/* --- MUI-like Design System --- */
:root {
    /* Font */
    --font-family: 'Roboto', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --mobile-composer-lift: 0px;
    --mobile-composer-reserve: 0px;

    /* Spacing Unit */
    --spacing-unit: 8px;

    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;

    /* Transitions */
    --transition-duration: 0.2s;
    --transition-timing: ease-in-out;

    /* Shadows (Elevation) */
    --shadow-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --shadow-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --shadow-4: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);
    --shadow-5: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);

    /* Light Mode Palette */
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #eeeeee;
    --bg-input: #f0f0f0;
    --bg-user-message: #e3f2fd;
    --bg-model-message: #ffffff;
    --bg-system-message: #fffde7;
    --bg-error-message: #ffebee;
    --bg-button: #1976d2;
    --bg-button-hover: #1565c0;
    --bg-button-disabled: rgba(0, 0, 0, 0.12);
    --bg-button-action: #757575;
    --bg-button-action-hover: #616161;
    --bg-button-delete: #d32f2f;
    --bg-button-delete-hover: #c62828;
    --bg-button-retry: #388e3c;
    --bg-button-retry-hover: #2e7d32;
    --bg-button-edit: #ffa000;
    --bg-button-edit-hover: #ff8f00;
    --bg-button-duplicate: #546e7a;
    --bg-button-duplicate-hover: #455a64;
    --bg-button-export: #0288d1;
    --bg-button-export-hover: #0277bd;
    --bg-button-save: #388e3c;
    --bg-button-save-hover: #2e7d32;
    --bg-button-cancel: #757575;
    --bg-button-cancel-hover: #616161;
    --bg-button-update: #1976d2;
    --bg-button-update-hover: #1565c0;
    --header-color-default: #1976d2;
    --bg-header: var(--header-color-custom, var(--header-color-default));
    --bg-message-actions: rgba(255, 255, 255, 0.9);
    --message-bubble-opacity: 1;
    --overlay-opacity-value: 0.75;
    --bg-overlay-light: rgba(255, 255, 255, var(--overlay-opacity-value));

    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #ffffff;
    --text-disabled: rgba(0, 0, 0, 0.26);
    --text-error: #b71c1c;
    --text-link: #1976d2;
    --text-placeholder: #9e9e9e;
    --text-system: #5d4037;

    --border-primary: #e0e0e0;
    --border-secondary: #bdbdbd;
    --border-tertiary: #f5f5f5;
    --border-danger: #ef9a9a;
    --border-system: #fff59d;

    --badge-color: #ffab00;
    --badge-size: 10px;
}

body.dark-mode {
    /* Dark Mode Palette */
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #272727;
    --bg-input: #2c2c2c;
    --bg-user-message: #0d47a1;
    --bg-model-message: #272727;
    --bg-system-message: #28354A;
    --bg-error-message: #4e1010;
    --bg-button: #90caf9;
    --bg-button-hover: #e3f2fd;
    --bg-button-disabled: rgba(255, 255, 255, 0.12);
    --bg-button-action: #424242;
    --bg-button-action-hover: #616161;
    --bg-button-delete: #ef9a9a;
    --bg-button-delete-hover: #ffcdd2;
    --bg-button-retry: #a5d6a7;
    --bg-button-retry-hover: #c8e6c9;
    --bg-button-edit: #ffe082;
    --bg-button-edit-hover: #fff8e1;
    --bg-button-duplicate: #b0bec5;
    --bg-button-duplicate-hover: #eceff1;
    --bg-button-export: #81d4fa;
    --bg-button-export-hover: #b3e5fc;
    --bg-button-save: #a5d6a7;
    --bg-button-save-hover: #c8e6c9;
    --bg-button-cancel: #bdbdbd;
    --bg-button-cancel-hover: #e0e0e0;
    --bg-button-update: #90caf9;
    --bg-button-update-hover: #e3f2fd;
    --header-color-default: #007aff;
    --bg-header: var(--header-color-custom, var(--header-color-default));
    --bg-message-actions: rgba(40, 40, 40, 0.9);
    --bg-overlay-dark: rgba(18, 18, 18, var(--overlay-opacity-value));

    --text-primary: #e0e0e0;
    --text-secondary: #bdbdbd;
    --text-light: #121212;
    --text-disabled: rgba(255, 255, 255, 0.3);
    --text-error: #ffcdd2;
    --text-link: #90caf9;
    --text-placeholder: #757575;
    --text-system: #B0C4DE;

    --border-primary: #424242;
    --border-secondary: #616161;
    --border-tertiary: #212121;
    --border-danger: #ef9a9a;
    --border-system: #3A506B;
}

/* --- Base Styles & Resets --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html, body {
    height: 100%;
    font-family: var(--font-family);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    overscroll-behavior-y: contain;
    transition: background-color var(--transition-duration) var(--transition-timing), color var(--transition-duration) var(--transition-timing);
    overflow: hidden;
    font-size: 14px;
    line-height: 1.5;
}
button {
    cursor: pointer;
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius-sm);
    border: none;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    background-color: var(--bg-button);
    color: var(--text-light);
    transition: background-color var(--transition-duration) var(--transition-timing), box-shadow var(--transition-duration) var(--transition-timing);
    box-shadow: var(--shadow-1);
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-unit);
    -webkit-tap-highlight-color: transparent;
    position: relative;
    overflow: hidden;
}
button:hover:not(:disabled) {
    background-color: var(--bg-button-hover);
    box-shadow: var(--shadow-2);
}
button:disabled {
    background-color: var(--bg-button-disabled);
    color: var(--text-disabled);
    box-shadow: none;
    cursor: not-allowed;
}
input, select, textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    margin-bottom: var(--spacing-unit);
    background-color: var(--bg-input);
    color: var(--text-primary);
    transition: background-color var(--transition-duration) var(--transition-timing), border-color var(--transition-duration) var(--transition-timing);
}
input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--bg-button);
    outline-offset: -1px;
    border-color: var(--bg-button);
}
textarea {
    min-height: 100px;
    resize: vertical;
}
label {
    display: block;
    margin-bottom: var(--spacing-unit);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
}
::placeholder { color: var(--text-placeholder); opacity: 1; }
.hidden { display: none !important; }

/* --- App Structure --- */
.app-container {
    display: flex;
    position: relative;
    height: 100%;
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--bg-primary);
    overflow: hidden;
}
body:not(.dark-mode) .app-container {
    box-shadow: var(--shadow-4);
}

/* --- Header --- */
.app-header {
    display: flex;
    align-items: center;
    padding: calc(var(--spacing-unit) + var(--safe-area-top)) calc(var(--spacing-unit) * 2) var(--spacing-unit);
    background-color: var(--bg-header);
    color: var(--text-light);
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 10;
    transition: background-color var(--transition-duration) var(--transition-timing);
    gap: 8px; /* 要素間のスペースを再設定 */
    box-shadow: var(--shadow-2);
}

.app-header h1 {
    font-size: 1.1rem;
    font-weight: 500;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    margin: 0;
    margin-right: auto;
    /* ボタンの高さに合わせるための行の高さを指定 */
    line-height: 40px; /* header-buttonのpadding(8*2) + icon-size(24) = 40px */
}



.header-button {
    background: none;
    border: none;
    color: var(--text-light);
    padding: var(--spacing-unit);
    line-height: 1;
    min-width: auto;
    flex-shrink: 0;
    border-radius: 50%;
    box-shadow: none;
}

.header-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}
#history-screen .app-header {
    flex-direction: row-reverse;
    justify-content: flex-start;
}
#history-screen .app-header h1#history-title {
    margin-right: 0;
    margin-left: auto;
    text-align: right;
}
.header-save-button {
    padding: 6px 12px;
    font-size: 0.8rem;
    background-color: transparent;
    border: 1px solid var(--text-light);
}
.header-save-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}
.new-chat-button {
    padding: 6px 12px;
    font-size: 0.8rem;
    background-color: var(--bg-button-save);
    color: var(--text-primary);
}
body.dark-mode .new-chat-button {
    color: var(--text-light);
}



/* --- Screen Transitions --- */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease-in-out;
    background-color: var(--bg-secondary);
    z-index: 0;
}
.screen.active {
    transform: translateX(0);
    z-index: 1;
}

/* --- Chat Screen --- */
#chat-screen {
    position: relative;
    z-index: 0;
    background-size: cover;
    background-position: center;
    /* background-imageプロパティを削除 */
    /* フェードインは一旦廃止し、シンプルな切り替えにする */
    transition: background-image 0.3s ease-in-out; 
}

/* 背景画像用の擬似要素を追加 */
#chat-screen::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: var(--chat-background-image, none); /* CSS変数から画像を設定 */
    background-size: cover;
    background-position: center;
    opacity: 0; /* 初期状態は透明 */
    transition: opacity 0.8s ease-in-out; /* フェード効果を0.8秒に設定 */
    z-index: 0; /* オーバーレイより後ろ */
}

/* このクラスが付与されたら、擬似要素をフェードインさせる */
#chat-screen.background-visible::before {
    opacity: 1;
}



#chat-overlay {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-color: var(--bg-overlay-light);
    opacity: var(--overlay-opacity-value, 0.75);
    transition: opacity 0.5s ease-in-out, background-color var(--transition-duration) var(--transition-timing);
    z-index: 0; /* コンテンツより後ろ、背景より手前 */
}

body.dark-mode #chat-overlay {
    background-color: var(--bg-overlay-dark);
}

.main-content {
    flex-grow: 1;
    overflow-y: auto;
    overflow-x: hidden; /* 横方向のスクロールを常に禁止する */
    padding: calc(var(--spacing-unit) * 2);
    position: relative;
    z-index: 1;
    touch-action: pan-y;
    padding-bottom: 40px;
}


#chat-screen .main-content {
    background-color: transparent;
    touch-action: pan-x pan-y pinch-zoom;
    scroll-padding-bottom: calc(120px + var(--mobile-composer-reserve));
    transition: padding-bottom var(--transition-duration) var(--transition-timing);
}
#chat-screen .app-header,
#chat-screen .chat-input-area {
    z-index: 2;
}

/* --- System Prompt --- */
.system-prompt-area {
    padding: calc(var(--spacing-unit) * 1.5);
    border: 1px solid var(--border-system);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-system-message);
    color: var(--text-system);
    transition: all var(--transition-duration) var(--transition-timing);
    position: relative;
    overflow: hidden;
    max-height: 500px;
    margin-top: 0;
    margin-bottom: calc(var(--spacing-unit) * 2);
}
.system-prompt-area summary {
    font-weight: 500;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-system);
}

/* --- Message Bubbles --- */
.message-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
}
.message {
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
    border-radius: var(--border-radius-lg);
    max-width: var(--message-max-width, 85%);
    min-width: 220px;
    position: relative;
    word-wrap: break-word;
    color: var(--text-primary);
    transition: background-color var(--transition-duration) var(--transition-timing), color var(--transition-duration) var(--transition-timing);
    box-shadow: var(--shadow-1);
    margin-top: calc(var(--spacing-unit) * 3);
    margin-bottom: calc(var(--spacing-unit) * 3);
}
.message:first-child { margin-top: 0; }
.message.user {
    background-color: color-mix(in srgb, var(--bg-user-message) calc(var(--message-bubble-opacity, 1) * 100%), transparent);
    align-self: flex-end;
    border-bottom-right-radius: var(--border-radius-sm);
}
.message.model {
    background-color: color-mix(in srgb, var(--bg-model-message) calc(var(--message-bubble-opacity, 1) * 100%), transparent);
    align-self: flex-start;
    border-bottom-left-radius: var(--border-radius-sm);
    max-width: 90%;
}
.message.error {
    background-color: var(--bg-error-message);
    color: var(--text-error);
}

/* --- Chat Input Area --- */
.chat-input-area {
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) + var(--safe-area-bottom));
    border-top: 1px solid var(--border-primary);
    background-color: var(--bg-primary);
    flex-shrink: 0;
    gap: var(--spacing-unit);
    transform: translateY(calc(-1 * var(--mobile-composer-lift)));
    transition: transform var(--transition-duration) var(--transition-timing), box-shadow var(--transition-duration) var(--transition-timing), padding-bottom var(--transition-duration) var(--transition-timing);
}
.chat-input-area textarea {
    flex-grow: 1;
    min-height: 44px;
    max-height: 150px;
    height: 44px;
    resize: none;
    margin-bottom: 0;
    padding: 10px;
    border-radius: var(--border-radius-lg);
    font-size: 16px;
    line-height: 1.4;
}
.chat-input-area button {
    height: 44px;
    width: 44px;
    padding: 0;
    font-size: 24px;
    flex-shrink: 0;
    border-radius: 50%;
}

body.dark-mode #attach-file-btn {
    color: var(--text-primary);
}
#send-button.sending {
    background-color: #ffc107;
    color: #333;
}
body.mobile-keyboard-open .chat-input-area {
    box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.12);
}

/* --- History Screen --- */
.history-list {
    list-style: none;
    padding: 0;
}
.history-item {
    padding: calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-unit);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-duration) var(--transition-timing), box-shadow var(--transition-duration) var(--transition-timing);
    cursor: pointer;
    box-shadow: var(--shadow-1);
}
.history-item:hover {
    background-color: var(--bg-tertiary);
    box-shadow: var(--shadow-2);
}
.history-item-actions button {
    padding: var(--spacing-unit);
    min-width: auto;
    border-radius: 50%;
    box-shadow: none;
}
.history-item-actions button .material-symbols-outlined { font-size: 1.25rem; }

/* --- Settings Screen --- */
.settings-group {
    margin-bottom: calc(var(--spacing-unit) * 3);
    padding: calc(var(--spacing-unit) * 2);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-1);
}
.settings-group h3 {
    margin-bottom: calc(var(--spacing-unit) * 2);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-primary);
    padding-bottom: var(--spacing-unit);
}

/* ダークモード時の設定画面のリンク色をピンク色に変更 */
body.dark-mode #settings-screen a {
    color: #ff91af;
}
body.dark-mode #settings-screen a:hover {
    color: #ffb3cc;
    text-decoration: underline;
}

/* --- Custom Dialog Styles (Alert, Confirm, Prompt) --- */
.custom-dialog {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: none;
    border-radius: var(--border-radius-md);
    padding: calc(var(--spacing-unit) * 3);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-5);
    min-width: 300px;
    max-width: calc(100vw - 32px);
    width: auto;
    box-sizing: border-box;
    z-index: 100;
}
.custom-dialog::backdrop {
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.custom-dialog.animating {
    animation: dialog-fade-in 0.2s ease-out;
}
@keyframes dialog-fade-in {
    from { opacity: 0; transform: translate(-50%, -45%); }
    to { opacity: 1; transform: translate(-50%, -50%); }
}

.custom-dialog .dialog-message {
    margin: 0 0 20px 0;
    font-size: 1rem;
    line-height: 1.6;
    white-space: pre-line;
}
.custom-dialog .dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-unit);
    margin-top: calc(var(--spacing-unit) * 2);
}

/* --- Other Styles --- */
.danger-zone {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid var(--border-danger);
}
.danger-zone button { width: 100%; }
.install-app-status {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}
.install-app-btn {
    width: 100%;
    justify-content: center;
    text-transform: none;
    background-color: var(--bg-button-update);
}
.install-app-btn:hover:not(:disabled) {
    background-color: var(--bg-button-update-hover);
}
.install-manual-hint {
    margin-top: 12px;
    padding: 12px 14px;
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.6;
}
.install-manual-hint p {
    margin: 0;
}
#update-app-btn { background-color: var(--bg-button-update); }
#update-app-btn:hover { background-color: var(--bg-button-update-hover); }
#clear-data-btn { background-color: var(--bg-button-delete); }
#clear-data-btn:hover { background-color: var(--bg-button-delete-hover); }

.param-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 15px; }
.image-upload-controls { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.background-thumbnail { max-width: 100px; max-height: 60px; border-radius: 4px; border: 1px solid var(--border-tertiary); object-fit: cover; }
.message-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    cursor: pointer;
}
#image-modal-overlay { background-color: rgba(0, 0, 0, 0.85); }
.citation-details, .function-call-details { margin-top: var(--spacing-unit); font-size: 0.8rem; border-top: 1px dashed var(--border-secondary); padding-top: var(--spacing-unit); }
.message-edit-area { margin-top: 5px; }
.message-edit-area textarea { min-height: 60px; margin-bottom: 5px; width: 100%; }
.message-edit-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 5px; }
.message-edit-actions button { padding: 4px 10px; font-size: 12px; }
.message-edit-actions .save-edit-btn { background-color: var(--bg-button-save); }
.message-edit-actions .save-edit-btn:hover { background-color: var(--bg-button-save-hover); }
.message-edit-actions .cancel-edit-btn { background-color: var(--bg-button-cancel); }
.message-edit-actions .cancel-edit-btn:hover { background-color: var(--bg-button-cancel-hover); }
.chat-input-area button#attach-file-btn.has-attachments .attachment-badge { display: block; }
#loading-indicator { position: fixed; bottom: 70px; right: 20px; background-color: var(--bg-tertiary); color: var(--text-secondary); padding: 6px 12px; border-radius: 15px; font-size: 11px; z-index: 3; box-shadow: var(--shadow-2); transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease; opacity: 0; visibility: hidden; transform: translateY(10px); pointer-events: none; }
#loading-indicator:not(.hidden) { opacity: 1; visibility: visible; transform: translateY(0); }
.network-status-banner {
    position: fixed;
    top: calc(var(--safe-area-top) + 12px);
    left: 50%;
    transform: translateX(-50%);
    width: min(560px, calc(100vw - 24px));
    background-color: #fff3cd;
    color: #7a5300;
    border: 1px solid #f0d98c;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-2);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    z-index: 1100;
    text-align: center;
    line-height: 1.5;
}
body.dark-mode .network-status-banner {
    background-color: #4c3b08;
    color: #ffe08a;
    border-color: #7d6110;
}
.network-status-banner .material-symbols-outlined {
    font-size: 20px;
    flex-shrink: 0;
}
.network-status-banner.hidden {
    display: none;
}
.history-item-details { overflow: hidden; min-width: 0; width: 100%; margin-bottom: 8px; }
.history-item-title { font-size: 15px; font-weight: bold; margin-bottom: 0px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; display: block; color: var(--text-primary); }
.history-item-bottom-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.history-item-dates { font-size: 9px; color: var(--text-secondary); flex-shrink: 0; line-height: 1.3; text-align: left; }
.history-item-dates span { display: block; white-space: nowrap; }
.history-item-actions { display: flex; gap: 8px; flex-shrink: 0; flex-wrap: nowrap; cursor: default; }
.js-history-item-template { display: none !important; }
#no-history-message { text-align: center; color: var(--text-secondary); margin-top: 20px; }
.checkbox-label { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; cursor: pointer; color: var(--text-primary); }
.checkbox-label input[type="checkbox"] { width: auto; margin-bottom: 0; cursor: pointer; }
.settings-slider-container { margin-top: 15px; }
.settings-slider-container label { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 8px; background: var(--bg-tertiary); border: 1px solid var(--border-primary); border-radius: 5px; outline: none; padding: 0; margin: 0; }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 20px; height: 20px; background: var(--bg-button); cursor: pointer; border-radius: 50%; border: 2px solid var(--bg-primary); }
input[type="range"]::-moz-range-thumb { width: 18px; height: 18px; background: var(--bg-button); cursor: pointer; border-radius: 50%; border: 2px solid var(--bg-primary); }
.settings-color-picker-container { display: flex; align-items: center; gap: 10px; margin-top: 15px; }
.settings-color-picker-container label { margin-bottom: 0; flex-shrink: 0; }
input[type="color"] { -webkit-appearance: none; appearance: none; width: 40px; height: 30px; padding: 0; border: none; background: none; cursor: pointer; margin-bottom: 0; }
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch { border: 1px solid var(--border-primary); border-radius: 4px; }
input[type="color"]::-moz-color-swatch { border: 1px solid var(--border-primary); border-radius: 4px; }
.settings-reset-button { background-color: var(--bg-button-action); color: var(--text-light); padding: 4px 10px; font-size: 12px; border-radius: 4px; margin-left: auto; }
.settings-reset-button:hover { background-color: var(--bg-button-action-hover); }
.message-content > *:first-child { margin-top: 0; }
.message-content > *:last-child { margin-bottom: 0; }
.message-content h1, .message-content h2, .message-content h3, .message-content h4, .message-content h5, .message-content h6 { margin-top: 1.2em; margin-bottom: 0.6em; font-weight: bold; line-height: 1.3; color: inherit; }
.message-content p { margin-bottom: 0.8em; }
.message-content ul, .message-content ol { margin-bottom: 0.8em; padding-left: 2em; }
.message-content li { margin-bottom: 0.3em; }
.message-content pre { background-color: var(--bg-secondary); padding: 10px; border-radius: 5px; overflow-x: auto; margin: 1em 0; font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace; font-size: 13px; border: 1px solid var(--border-tertiary); color: var(--text-secondary); }
.message.user .message-content pre { background-color: transparent; padding: 0; margin: 0; border: none; border-radius: 0; color: inherit; font-family: inherit; font-size: inherit; line-height: inherit; white-space: pre-wrap; word-wrap: break-word; overflow-x: visible; }
.message-content code:not(pre > code) { background-color: var(--bg-secondary); padding: 0.2em 0.4em; border-radius: 3px; font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace; font-size: 0.9em; border: 1px solid var(--border-tertiary); color: var(--text-secondary); }
.message-content blockquote { margin: 1em 0; padding-left: 1em; border-left: 4px solid var(--border-primary); color: var(--text-secondary); }
.message-content a { color: var(--text-link); text-decoration: underline; }
.message-content table { border-collapse: collapse; margin: 1em 0; width: auto; border: 1px solid var(--border-secondary); }
.message-content th, .message-content td { border: 1px solid var(--border-secondary); padding: 6px 10px; text-align: left; }
.message-content th { background-color: var(--bg-tertiary); font-weight: bold; }
.message-content hr { border: none; border-top: 1px solid var(--border-secondary); margin: 1.5em 0; }
.message.editing.show-actions .message-actions, .message.editing.show-actions .message-cascade-controls { display: none !important; }
.message-actions .token-count-display { font-size: 0.8rem; color: var(--text-secondary); vertical-align: middle; line-height: 1.5; white-space: nowrap; }
.thought-summary-details { margin-bottom: 10px; font-size: 13px; border: 1px solid var(--border-tertiary); border-radius: 5px; background-color: var(--bg-tertiary); }
.thought-summary-details summary { cursor: pointer; font-weight: 500; color: var(--text-secondary); list-style: none; padding: 6px 10px; outline: none; display: flex; align-items: center; gap: 5px; user-select: none; }
.thought-summary-details summary::before { content: '🧠'; font-size: 14px; display: inline-block; }
.thought-summary-details[open] summary { border-bottom: 1px solid var(--border-tertiary); }
.thought-summary-content { padding: 8px 10px; font-size: 13px; line-height: 1.5; color: var(--text-primary); word-wrap: break-word; }
.attachment-details { margin-top: 10px; font-size: 12px; border: 1px solid var(--border-attachment-details); border-radius: 5px; background-color: var(--bg-attachment-details); }
.attachment-details summary { cursor: pointer; font-weight: normal; color: var(--text-attachment-summary); list-style: none; padding: 5px 10px; outline: none; display: flex; align-items: center; gap: 5px; }
.attachment-details summary::before { content: '📎'; font-size: 14px; display: inline-block; }
.attachment-details[open] summary { border-bottom: 1px solid var(--border-attachment-details); }
.attachment-list { list-style: none; padding: 8px 10px 5px 10px; margin: 0; }
.attachment-list li { margin-bottom: 4px; font-size: 10px; color: var(--text-attachment-filename); overflow-wrap: break-word; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; line-height: 1.4; }
#fileUploadDialog {
    min-width: 320px;
    max-width: 600px;
    width: 90%;
    max-height: calc(100vh - 40px - var(--safe-area-top) - var(--safe-area-bottom));
}
.dialog-content {
    margin-bottom: 20px;
    overflow-y: auto;
}
.file-upload-area { margin-bottom: 15px; text-align: center; }
.file-upload-area .dialog-button {
    /* ボタンらしい見た目を再現するためのスタイル */
    display: inline-block; /* 中央揃えとpaddingを正しく適用するため */
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    color: var(--text-light);
    background-color: var(--bg-button);
    border: none;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-1);
    cursor: pointer;
    text-align: center;
    user-select: none; /* テキスト選択を防止 */
    -webkit-tap-highlight-color: transparent; /* モバイルでのタップ時のハイライトを無効化 */
    transition: background-color var(--transition-duration) var(--transition-timing), box-shadow var(--transition-duration) var(--transition-timing);
}

/* ホバー時のスタイルも追加 */
.file-upload-area .dialog-button:hover {
    background-color: var(--bg-button-hover);
    box-shadow: var(--shadow-2);
}
#selected-files-list { list-style: none; padding: 0; margin: 0; max-height: 200px; overflow-y: auto; border: 1px solid var(--border-secondary); border-radius: 5px; background-color: var(--bg-secondary); }
.selected-file-item { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--border-tertiary); background-color: var(--bg-tertiary); }
.selected-file-item:last-child { border-bottom: none; }
.selected-file-info { flex-grow: 1; overflow: hidden; margin-right: 10px; min-width: 0; }
.selected-file-name { display: block; font-size: 14px; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.selected-file-size { display: block; font-size: 11px; color: var(--text-secondary); }
.remove-file-btn { background-color: var(--bg-button-delete); color: var(--text-light); border: none; border-radius: 15%; width: 22px; height: 22px; min-width: 0 !important; font-size: 14px; line-height: 1; padding: 0; cursor: pointer; flex-shrink: 0; display: flex; justify-content: center; align-items: center; }
#file-upload-notice { font-size: 11px; color: var(--text-secondary); margin-top: 10px; text-align: center; }

/* --- Animations & Effects --- */
@keyframes pop-in {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}
.message:nth-last-child(-n+2) {
    animation: pop-in 0.3s var(--transition-timing) forwards;
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}
.ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    animation: ripple 0.6s linear;
    background-color: rgba(255, 255, 255, 0.7);
}
body.dark-mode .ripple {
    background-color: rgba(0, 0, 0, 0.7);
}

/* --- Message Actions --- */
.message-actions, .message-cascade-controls {
    position: absolute;
    display: flex;
    opacity: 0;
    transform: translateY(8px);
    flex-wrap: nowrap;
    gap: var(--spacing-unit);
    background: var(--bg-message-actions);
    padding: var(--spacing-unit);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-2);
    z-index: 2;
    transition: opacity var(--transition-duration) var(--transition-timing), transform var(--transition-duration) var(--transition-timing);
    width: max-content;
    white-space: nowrap;
    /* pointer-events: none; を削除 */
    will-change: opacity, transform;
}

.message-actions { bottom: calc(-1 * var(--spacing-unit) * 5.5); }
.message-cascade-controls {
    top: calc(-1 * var(--spacing-unit) * 5.5);
    left: 0;
    align-items: center;
}

.message:hover .message-actions,
.message:hover .message-cascade-controls {
  opacity: 1;
  transform: translateY(0);
  /* pointer-events: auto; はデフォルト値なので不要 */
}

/* 編集中のメッセージでは、ホバーしてもメニューを表示しないようにする */
.message.editing:hover .message-actions,
.message.editing:hover .message-cascade-controls {
  opacity: 0;
}

.message.user .message-actions { right: 0; }
.message.model .message-actions { left: var(--spacing-unit); }

.message-actions button, .message-cascade-controls button {
    padding: calc(var(--spacing-unit) * 0.5) var(--spacing-unit);
    font-size: 0.75rem;
    min-width: auto;
    gap: 4px;
    box-shadow: none;
    white-space: nowrap;
    flex: 0 0 auto;
}
.message-actions button .material-symbols-outlined, .message-cascade-controls button .material-symbols-outlined {
    font-size: 1rem;
}
.message-cascade-controls .cascade-indicator {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0 var(--spacing-unit);
    white-space: nowrap;
    font-weight: 500;
}
.message-cascade-controls .cascade-delete-btn {
    background-color: var(--bg-button-delete);
    color: var(--text-light);
}
body.dark-mode .message-cascade-controls .cascade-delete-btn {
    color: var(--text-primary);
}
.message-cascade-controls .cascade-delete-btn:hover {
    background-color: var(--bg-button-delete-hover);
}
.message.retrying-hidden {
    display: none !important;
}

.thought-summary-details {
    margin-bottom: 10px;
    font-size: 13px;
    border: 1px solid var(--border-tertiary);
    border-radius: 5px;
    background-color: var(--bg-tertiary);
}
.thought-summary-details summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    list-style: none;
    padding: 6px 10px;
    outline: none;
    display: flex;
    align-items: center;
    gap: 5px;
    user-select: none;
}
.thought-summary-details summary::before {
    content: '🧠';
    font-size: 14px;
    display: inline-block;
}
.thought-summary-details {
    margin-bottom: 10px;
    font-size: 13px;
    border: 1px solid var(--border-tertiary);
    border-radius: 5px;
    background-color: var(--bg-secondary);
}

.thought-summary-content ul,
.thought-summary-content ol {
    padding-left: 2em; 
}

.thought-summary-content {
    padding: 8px 10px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-primary);
    word-wrap: break-word;
}

.thought-summary-content {
    padding: 8px 10px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-primary);
    word-wrap: break-word;
}

/* --- Prism.js Custom Overrides --- */
.message-content pre[class*="language-"],
.message-content pre[class*="language-"] code {
    white-space: pre-wrap;
    word-break: break-all;
}

/* --- Drag and Drop Styles --- */
#chat-screen.drag-over::after {
    content: 'ここにファイルをドロップ';
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-light);
    background-color: rgba(0, 0, 0, 0.5);
    border: 3px dashed var(--bg-button);
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-unit);
    z-index: 100;
    pointer-events: none; /* After要素がイベントを奪わないように */
}

body.dark-mode #chat-screen.drag-over::after {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.5);
}

/* --- Attachment Button Badge Fix --- */
#attach-file-btn {
    position: relative;
    background-color: transparent;
    color: var(--text-secondary);
    box-shadow: none;
    display: grid; /* Gridレイアウトで重ね合わせる */
    place-items: center;
    overflow: visible; /* バッジがはみ出せるように */
}

#attach-file-btn .attach-icon-container,
#attach-file-btn .attach-badge-container {
    grid-area: 1 / 1; /* アイコンとバッジを同じセルに配置 */
}

#attach-file-btn .attach-icon-container {
    z-index: 1; /* アイコンを奥に */
}

#attach-file-btn .attach-badge-container {
    z-index: 2; /* バッジコンテナを手前に */
    width: 100%;
    height: 100%;
    position: relative; /* バッジの配置基準 */
}

.attachment-badge {
    position: absolute;
    top: 5px;   /* 位置を微調整 */
    right: 5px; /* 位置を微調整 */
    width: var(--badge-size);
    height: var(--badge-size);
    background-color: var(--badge-color);
    border-radius: 50%;
    border: 1px solid var(--bg-primary);
    display: none;
}

/* 既存の表示切り替えルールはそのまま利用 */
.chat-input-area button#attach-file-btn.has-attachments .attachment-badge {
    display: block;
}

/* --- Function Call & Search Results Details --- */
.function-call-details {
    margin-top: var(--spacing-unit);
    font-size: 0.8rem;
    border-top: 1px dashed var(--border-secondary); /* 上部に点線の区切り */
    padding-top: var(--spacing-unit);
}
.function-call-details summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    list-style: none;
    padding: 0 0 4px 0; /* 下方向の余白を少し確保 */
    outline: none;
    display: flex;
    align-items: center;
    gap: 5px;
    user-select: none;
}
.function-call-details[open] summary {
    margin-bottom: 6px; /* 展開時にリストとの間に少し余白 */
}
.function-call-list {
    padding-left: 25px; /* リストのインデント */
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.6;
}
.function-call-list li {
    margin-bottom: 4px;
}

/* --- 連続するツールブロックの区切り線を消す --- */
.function-call-details + .function-call-details {
    border-top: none;
    padding-top: 0;
    margin-top: calc(var(--spacing-unit) / 2); /* 連続する場合のブロック間の余白を少し詰める */
}

/* --- Image Modal Styles --- */
#image-modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

#image-modal-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-5);
}

#image-modal-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 30px;
    color: white;
    cursor: pointer;
    font-weight: bold;
    line-height: 1;
    text-shadow: 0 0 5px black;
}

/* --- Profile Card Styles (Header) --- */
.app-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
}
.app-header h1#chat-title {
    margin: 0;
    margin-right: auto;
    font-size: 1.1rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-grow: 1;
    min-width: 50px;
}
.profile-card-wrapper {
    position: relative;
    flex-shrink: 0;
}
.app-header .profile-card {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px;
    border-radius: 20px;
    cursor: pointer;
    transition: background-color var(--transition-duration) var(--transition-timing);
    max-width: 180px;
    background-color: rgba(255, 255, 255, 0.1); 
    border: 1px solid rgba(255, 255, 255, 0.2);
}
.app-header .profile-card:hover {
    background-color: rgba(255, 255, 255, 0.2);
}
.profile-icon-container {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.3);
    overflow: hidden;
}

.profile-icon-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.profile-icon-container .material-symbols-outlined {
    font-size: 24px;
    color: var(--text-light);
}
.profile-card-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-light);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 4px;
}
.profile-card-arrow {
    font-size: 20px;
    color: var(--text-light);
}
.app-header .header-button,
.app-header .new-chat-button {
    flex-shrink: 0;
}

/* --- Profile Menu (Dropdown) --- */
.app-header .profile-menu,
#settings-screen .profile-menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-3);
    z-index: 100;
    overflow: hidden;
    min-width: 180px;
    border: 1px solid var(--border-primary);
}
.profile-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    cursor: pointer;
    transition: background-color var(--transition-duration) var(--transition-timing);
    color: var(--text-primary);
    font-size: 0.9rem;
}
.profile-menu-item:hover {
    background-color: var(--bg-tertiary);
}
.profile-menu-item.active {
    font-weight: 700;
    background-color: var(--bg-secondary);
}
.profile-menu-item .profile-icon-container {
    width: 24px;
    height: 24px;
}
.profile-menu-item .material-symbols-outlined {
    font-size: 20px;
}

/* --- Profile Management Styles (Settings Screen) --- */
#profile-management-group {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    padding-bottom: 12px;
}

#profile-management-group h3 {
    display: none;
}

.profile-display-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background-color: var(--bg-tertiary);
    padding: 12px 16px;
    border-radius: var(--border-radius-lg);
    margin-bottom: 16px;
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-1);
}
.profile-display-icon-wrapper {
    position: relative;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
}
.profile-display-icon-wrapper label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    background-color: var(--bg-secondary);
    cursor: pointer;
}
.profile-display-icon-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.profile-display-icon-wrapper .default-icon-placeholder .material-symbols-outlined {
    font-size: 40px;
    color: var(--text-secondary);
}
.profile-display-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex-grow: 1;
    min-width: 0;
}
.profile-display-name-wrapper {
    display: flex;
    align-items: center;
    gap: 4px;
}
.profile-display-name-main {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.profile-display-name-sub {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-display-status {
    display: none;
}

.icon-button {
    background: none;
    border: none;
    padding: 4px;
    box-shadow: none;
    color: var(--text-secondary);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.icon-button .material-symbols-outlined {
    font-size: 18px;
}
.icon-button:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}
.icon-button-overlay {
    position: absolute;
    top: -4px;
    right: -4px;
    background-color: var(--bg-button-delete);
    color: var(--text-light) !important;
    width: 24px;
    height: 24px;
    padding: 0;
    opacity: 0;
    transition: opacity var(--transition-duration) var(--transition-timing);
}
.profile-display-icon-wrapper:hover .icon-button-overlay {
    opacity: 1;
}
.icon-button-overlay .material-symbols-outlined {
    font-size: 16px;
}
.profile-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 12px;
    margin-top: 0; 
    border-top: none; 
    padding-top: 0;
}
.profile-actions button {
    font-size: 0.8rem;
    padding: 8px 12px;
    justify-content: flex-start;
    background-color: var(--bg-button-action);
    color: var(--text-light);
}
.profile-actions button:hover {
    background-color: var(--bg-button-action-hover);
}
/* ダークモード時のボタン文字色を調整 */
body.dark-mode .profile-actions button {
    color: var(--text-primary);
}

/* --- Profile Management Button Color Fix --- */

/* 基本のボタンスタイル */
#profile-management-group .profile-actions button {
    background-color: var(--bg-button-action);
    color: var(--text-light);
}
#profile-management-group .profile-actions button:hover {
    background-color: var(--bg-button-action-hover);
}

/* ダークモード時のボタンスタイルを明示的に指定 */
body.dark-mode #profile-management-group .profile-actions button {
    background-color: #424242;
    color: var(--text-primary);
}
body.dark-mode #profile-management-group .profile-actions button:hover {
    background-color: #616161;
}

/* --- Footer Profile Card --- */
.chat-input-area .profile-card-wrapper {
    position: relative;
    flex-shrink: 0;
    align-self: flex-end; 
}

.chat-input-area .profile-card {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color var(--transition-duration) var(--transition-timing);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    height: 44px;
    width: 44px;
}

.chat-input-area .profile-card:hover {
    background-color: var(--border-primary);
}

.chat-input-area .profile-icon-container {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-secondary);
    overflow: hidden;
}

.chat-input-area .profile-icon-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-input-area .profile-icon-container .material-symbols-outlined {
    font-size: 28px;
    color: var(--text-secondary);
}

/* --- Footer Dropdown Menu Position --- */
.chat-input-area .profile-menu {
    position: absolute;
    bottom: calc(100% + 4px);
    left: 0;
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-3);
    z-index: 100;
    overflow: hidden;
    min-width: 200px;
    border: 1px solid var(--border-primary);
}

/* --- Profile Menu Item Layout --- */
.profile-menu-item {
    gap: 10px;
    padding: 8px 12px;
}

.profile-menu-text-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden; 
}

.profile-menu-name {
    font-size: 0.85rem; 
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-menu-model {
    font-size: 0.7rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-menu-item.active .profile-menu-name {
    font-weight: 700;
}

/* --- Profile Actions Note --- */
.profile-actions-note {
    font-size: 0.7rem;
    color: var(--text-secondary);
    text-align: right;
    margin-top: 8px;
    line-height: 1.4;
}

.profile-actions-note a {
    color: var(--text-link);
    text-decoration: none;
}

.profile-actions-note a:hover {
    text-decoration: underline;
}

/* --- Empty Model Bubble Fix --- */
.message.model:not(:has(.thought-summary-details)):has(.message-content:empty) {
    padding: 0;
    margin: 0;
    border: none;
    box-shadow: none;
    min-height: 20px; /* 瞬時に表示される際のレイアウトシフトを最小限に抑えるための高さ確保 */
    background-color: transparent;
}

#chat-screen { transform: translateX(0); }
#history-screen { transform: translateX(-100%); }
#settings-screen { transform: translateX(100%); }

/* --- Lazy Load Image Styles --- */
.lazy-load-image {
    background-color: var(--bg-tertiary);
    min-height: 100px; /* 読み込み中の高さを確保 */
    display: block;
    border-radius: var(--border-radius-md);
    margin-top: 8px;
    transition: opacity 0.3s ease-in-out;
    opacity: 0.5;
}

.lazy-load-image[src] {
    min-height: auto; /* 読み込み後は高さを自動に */
    background-color: transparent;
    opacity: 1;
}

.lazy-load-image.load-error {
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-error);
    border: 1px dashed var(--border-danger);
}
/* --- App Update Notification --- */
.update-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-3);
    display: flex;
    align-items: center;
    gap: 15px;
    z-index: 1000;
    animation: slide-up 0.5s ease-out forwards;
}

.update-notification.hidden {
    display: none;
}

@keyframes slide-up {
    from {
        transform: translate(-50%, 100px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%);
        opacity: 1;
    }
}

#reload-for-update-btn {
    padding: 6px 16px;
    font-size: 0.8rem;
    background-color: var(--bg-button-update);
    color: var(--text-light);
    box-shadow: none;
}
body.dark-mode #reload-for-update-btn {
    color: var(--text-primary);
}

/* --- Wide Mode Styles (for PC) --- */
@media screen and (min-width: 801px) {
    body.wide-mode-enabled .app-container {
        max-width: 1600px;
    }
}

/* --- Asset Management Styles --- */
.asset-count-display {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-align: center;
}

.asset-actions {
    display: grid;
    /* 3つのボタンを均等な幅で横に並べる */
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 8px;
}

.asset-actions button {
    font-size: 0.8rem;
    padding: 10px 12px;
    /* アイコンとテキストを中央揃えにする */
    justify-content: center;
    background-color: var(--bg-button-action);
    color: var(--text-light);
    /* アイコンとテキストの間のスペース */
    gap: 8px;
}
.asset-actions button:hover {
    background-color: var(--bg-button-action-hover);
}
body.dark-mode .asset-actions button {
    color: var(--text-primary);
}


/* --- Asset Conflict Dialog Styles --- */
#assetConflictDialog .dialog-title {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--text-primary);
}
#assetConflictDialog .dialog-actions-main {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-top: 20px;
}
#assetConflictDialog .dialog-actions-main .dialog-button {
    flex-grow: 1;
    padding: 10px;
    font-size: 0.8rem;
    background-color: var(--bg-button-action);
}
body.dark-mode #assetConflictDialog .dialog-actions-main .dialog-button {
    color: var(--text-primary);
}
#assetConflictDialog .dialog-actions-sub {
    margin-top: 15px;
    border-top: 1px solid var(--border-primary);
    padding-top: 15px;
}
#assetConflictDialog .checkbox-label {
    justify-content: center;
    font-size: 0.8rem;
    margin-bottom: 0;
}

/* --- Memory Settings --- */
.settings-group-subsection {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-primary);
}

#memory-options-container {
    margin-top: 16px;
    padding-left: 0; /* 左のパディングを削除してインデントをなくす */
}


/* --- Memory Management Dialog --- */
#memoryManagementDialog {
    width: 90%;
    max-width: 600px;
}

.dialog-title {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.memory-list-container {
    max-height: 40vh;
    overflow-y: auto;
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    margin-bottom: 16px;
    padding: 8px;
    background-color: var(--bg-secondary);
}

.memory-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-primary);
    margin-bottom: 8px;
}

.memory-item-text {
    flex-grow: 1;
    font-size: 0.9rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
}

.memory-item-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.memory-item-actions button {
    padding: 4px;
    min-width: auto;
    box-shadow: none;
}
.memory-item-actions button .material-symbols-outlined {
    font-size: 16px;
}

.memory-add-form {
    display: flex;
    gap: 8px;
}

.memory-add-form textarea {
    flex-grow: 1;
    min-height: 60px;
    height: 60px;
    margin-bottom: 0;
}

.memory-add-form button {
    flex-shrink: 0;
    align-self: flex-end;
}

#memory-toggle-btn.active {
    color: var(--badge-color);
}

/* --- Header Auto-Hide Feature --- */

/* 機能が有効な時の基本設定 */
body.header-auto-hide #chat-screen .app-header {
    transform: translateY(-100%);
    transition: transform 0.3s ease-in-out;
    position: absolute;
    width: 100%;
    max-width: inherit;
    z-index: 12;
}

body.header-auto-hide #chat-screen .main-content {
    height: 100%;
}

/* PC向け: 画面上部の透明なトリガーエリア */
@media (hover: hover) and (pointer: fine) {
    body.header-auto-hide #header-trigger-area {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 40px;
        z-index: 11;
        /* background: rgba(255,0,0,0.2); */ /* デバッグ用 */
    }
}

/* JSによってこのクラスが付与されたときにヘッダーを表示 */
body.header-auto-hide.header-force-show #chat-screen .app-header {
    transform: translateY(0);
}

@media screen and (max-width: 600px) {
    #chat-screen .main-content {
        padding: calc(var(--spacing-unit) * 1.5);
        padding-bottom: calc(112px + var(--mobile-composer-reserve));
    }

    body.composer-focus-active #chat-screen .main-content {
        padding-bottom: calc(148px + var(--mobile-composer-reserve));
    }

    .chat-input-area {
        gap: 10px;
        padding: calc(var(--spacing-unit) * 1.25) calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 1.25 + var(--safe-area-bottom));
    }

    .chat-input-area textarea {
        min-height: 46px;
        max-height: min(34vh, 180px);
        padding: 12px 14px;
    }

    .chat-input-area button,
    .chat-input-area .profile-card {
        width: 46px;
        height: 46px;
    }

    .chat-input-area .profile-icon-container {
        width: 34px;
        height: 34px;
    }

    .chat-input-area .profile-menu {
        min-width: min(240px, calc(100vw - 24px));
        left: 0;
    }

    .custom-dialog {
        padding: calc(var(--spacing-unit) * 2);
    }

    .custom-dialog .dialog-actions {
        flex-wrap: wrap;
    }

    .custom-dialog .dialog-actions button {
        flex: 1 1 140px;
        min-height: 44px;
    }

    #fileUploadDialog {
        min-width: 0;
        width: calc(100vw - 20px);
        max-height: calc(100vh - 24px - var(--safe-area-top) - var(--safe-area-bottom));
    }

    #fileUploadDialog .dialog-content {
        max-height: calc(70vh - 96px);
    }

    #selected-files-list {
        max-height: min(34vh, 240px);
    }

    .network-status-banner {
        left: 12px;
        right: 12px;
        width: auto;
    }

    .sync-backup-header {
        flex-direction: column;
        align-items: stretch;
    }

    .sync-snapshot-item-header {
        flex-direction: column;
    }

    .sync-snapshot-item-time {
        white-space: normal;
    }
}

/* --- History Summary Feature --- */
#summaryDialog {
    width: 90%;
    max-width: 700px;
}

.summary-stats {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-align: center;
    background-color: var(--bg-tertiary);
    padding: 8px;
    border-radius: var(--border-radius-sm);
}

.summary-editor {
    width: 100%;
    min-height: 200px;
    max-height: 50vh;
    font-size: 0.9rem;
    line-height: 1.6;
}

.summary-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.summary-main-actions {
    display: flex;
    gap: 10px;
}

/* --- Summary Dialog Description --- */
.summary-description {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-md);
    padding: 10px 12px;
    margin-bottom: 12px;
}
.summary-description p {
    margin-bottom: 8px;
    font-weight: 500;
}
.summary-description ul {
    padding-left: 18px;
    margin: 0;
}
.summary-description li {
    margin-bottom: 4px;
}

/* --- Summary Marker in Chat --- */
.summary-marker {
    width: 80%;
    margin: 20px auto;
    text-align: center;
    border-bottom: 1px dashed var(--border-secondary);
    position: relative;
}
.summary-marker-text {
    font-size: 0.7rem;
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    padding: 0 10px;
    position: relative;
    top: 8px; /* 線の中央に来るように調整 */
}

/* --- Progress Dialog --- */
.progress-dialog {
    text-align: center;
}
.progress-dialog .dialog-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-bottom: 0;
}
.progress-dialog .dialog-message {
    margin-bottom: 0;
    font-size: 0.9rem;
}
.progress-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--bg-tertiary);
    border-top-color: var(--bg-button);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* --- Floating Action Panel --- */
.floating-action-panel {
    position: absolute;
    top: 60px; /* ヘッダー表示時のデフォルト位置 */
    left: 16px;
    display: flex;
    gap: 8px;
    z-index: 5;
    opacity: 0; /* 初期状態は非表示 */
    pointer-events: none; /* 非表示時はクリックできないように */
    transition: opacity 0.3s ease-in-out, top var(--transition-duration) var(--transition-timing);
}

.floating-action-panel.visible {
    opacity: 1;
    pointer-events: auto;
}

/* ヘッダー自動非表示が有効な場合、ボタンの初期位置を上に設定 */
body.header-auto-hide .floating-action-panel {
    top: 16px;
}

/* ヘッダー自動非表示が有効で、かつヘッダーが表示されている場合の位置 */
body.header-auto-hide.header-force-show .floating-action-panel {
    top: 60px;
}

.floating-action-panel .floating-action-button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    /* 半透明の背景色を常に表示 */
    background-color: rgba(255, 255, 255, 0.8);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-2);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all var(--transition-duration) var(--transition-timing);
    padding: 0;
}

.floating-action-panel .floating-action-button .material-symbols-outlined {
    font-size: 22px;
}

.floating-action-panel .floating-action-button:hover:not(:disabled) {
    background-color: var(--bg-button-action);
    color: #ffffff;
    box-shadow: var(--shadow-3);
    transform: scale(1.1);
}

.floating-action-panel .floating-action-button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: scale(1);
    /* disabledでもデザインを維持 */
    background-color: rgba(255, 255, 255, 0.8);
    color: var(--text-disabled);
    border: 1px solid var(--border-primary);
}

body.dark-mode .floating-action-panel .floating-action-button {
    background-color: rgba(40, 40, 40, 0.8);
    color: var(--text-primary);
    border-color: var(--border-secondary);
}

body.dark-mode .floating-action-panel .floating-action-button:hover:not(:disabled) {
    background-color: var(--bg-button-action-hover);
    color: #ffffff;
}

body.dark-mode .floating-action-panel .floating-action-button:disabled {
    background-color: rgba(40, 40, 40, 0.8);
    color: var(--text-disabled);
    border-color: var(--border-secondary);
}

.floating-action-panel .floating-action-button.active {
    color: var(--badge-color);
    /* アクティブ状態が分かりやすいように、少し背景を濃くする */
    background-color: rgba(255, 255, 255, 0.9); 
}

body.dark-mode .floating-action-panel .floating-action-button.active {
    background-color: rgba(60, 60, 60, 0.9);
}


/* --- Asset Management Dialog --- */
#assetManagementDialog {
    width: 90%;
    max-width: 700px;
}

.asset-list-container {
    max-height: 60vh;
    overflow-y: auto;
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    padding: 8px;
    background-color: var(--bg-secondary);
}

.asset-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-primary);
    margin-bottom: 8px;
    box-shadow: var(--shadow-1);
}
.asset-item:last-child {
    margin-bottom: 0;
}

.asset-thumbnail {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-tertiary);
    flex-shrink: 0;
}

.asset-info {
    flex-grow: 1;
    min-width: 0; /* flexアイテムの縮小問題を解決 */
}

.asset-name {
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: block; /* ブロック要素にしてellipsisを有効化 */
}

.asset-details {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.asset-actions-item button {
    padding: 6px;
    min-width: auto;
    box-shadow: none;
    background-color: var(--bg-button-delete);
}
.asset-actions-item button:hover {
    background-color: var(--bg-button-delete-hover);
}
.asset-actions-item button .material-symbols-outlined {
    font-size: 20px;
}

/* --- Dialog Delete Button --- */
.dialog-delete-btn {
    background-color: var(--bg-button-delete);
    color: var(--text-light);
    margin-right: auto; /* 左端に配置 */
}
.dialog-delete-btn:hover {
    background-color: var(--bg-button-delete-hover);
}
body.dark-mode .dialog-delete-btn {
    /* ダークモード時は、背景が明るい赤になるため、文字色を暗くする */
    color: var(--text-light); /* In dark mode, this variable is a dark color */
}

/* --- Character Profile Dialog --- */
#characterProfileDialog {
    width: 95%;
    max-width: 800px;
    height: 80%;
    max-height: 700px;
    padding: 0; /* dialog自体のpaddingは不要 */
    overflow: hidden; /* ラッパーの角丸を有効にするため */
}

/* 新しいラッパーにFlexboxレイアウトを適用 */
.dialog-layout-wrapper {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary); /* 背景色をラッパーに移動 */
}

.profile-dialog-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    border-bottom: 1px solid var(--border-primary);
    flex-shrink: 0;
}
.profile-dialog-header .dialog-title {
    margin-bottom: 0;
}
.profile-dialog-header .header-button {
    color: var(--text-primary);
    box-shadow: none;
    padding: 4px;
}

#characterProfileDialog .dialog-content {
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    overflow-y: auto;
    flex-grow: 1;
    min-height: 0;
}

.profile-dialog-layout {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 16px;
    height: 100%;
}

.profile-character-list {
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    padding: 8px;
    background-color: var(--bg-secondary);
    overflow-y: auto;
    height: 100%;
}

.profile-character-item {
    padding: 10px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 500;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.profile-character-item:hover {
    background-color: var(--border-primary);
}
.profile-character-item.active {
    background-color: var(--bg-button);
    color: var(--text-light);
}

.profile-detail-pane {
    overflow-y: auto;
    padding-right: 8px;
    height: 100%;
}

.profile-detail-section {
    margin-bottom: 20px;
}
.profile-detail-section label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
.profile-detail-section input,
.profile-detail-section textarea,
.profile-detail-section select {
    margin-bottom: 0;
}
.profile-detail-section textarea {
    min-height: 80px;
}

.profile-relationships-grid {
    display: grid;
    gap: 12px;
}
.profile-relationship-card {
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    padding: 12px;
    background-color: var(--bg-secondary);
}
.profile-relationship-card h5 {
    font-size: 0.9rem;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-primary);
    padding-bottom: 6px;
}

#characterProfileDialog .dialog-actions {
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 3);
    border-top: 1px solid var(--border-primary);
    flex-shrink: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dialog-note {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* --- 戻るボタンの表示制御 --- */
/* デフォルト（PC含む）では、戻るボタンを非表示にする */
#profile-back-btn {
    display: none;
}
/* スマホサイズで、かつ詳細表示中の場合のみ、表示するように上書きする */
@media screen and (max-width: 600px) {
    #characterProfileDialog.details-visible #profile-back-btn {
        display: inline-flex;
    }
}


/* Responsive for Mobile */
@media screen and (max-width: 600px) {
    .profile-dialog-layout {
        display: block;
        height: auto;
    }
    .profile-character-list, .profile-detail-pane {
        height: auto;
    }
    .profile-detail-pane {
        display: none;
    }
    #characterProfileDialog.details-visible .profile-character-list {
        display: none;
    }
    #characterProfileDialog.details-visible .profile-detail-pane {
        display: block;
    }
    .profile-character-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .profile-character-item::after {
        content: '>';
        color: var(--text-secondary);
    }

    #profile-back-btn {
        display: none;
    }
    /* スマホで詳細表示中のみ、表示するように上書きする */
    #characterProfileDialog.details-visible #profile-back-btn {
        display: inline-flex;
    }
}

/* --- Character Profile Dialog Additions --- */
.profile-detail-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}
.profile-detail-section-header label {
    margin-bottom: 0;
}
.add-relationship-btn {
    padding: 2px 8px;
    font-size: 0.7rem;
    min-width: auto;
    background-color: var(--bg-button-action);
}
.add-relationship-btn:hover {
    background-color: var(--bg-button-action-hover);
}

.profile-relationship-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border-primary);
    padding-bottom: 6px;
}
.profile-relationship-card-header h5 {
    margin-bottom: 0;
    border-bottom: none;
    padding-bottom: 0;
}
.delete-relationship-btn {
    padding: 4px;
    min-width: auto;
    box-shadow: none;
    background-color: transparent;
    color: var(--text-secondary);
}
.delete-relationship-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-error);
}
.delete-relationship-btn .material-symbols-outlined {
    font-size: 18px;
}

.profile-delete-character-section {
    margin-top: 30px;
    padding-top: 15px;
    border-top: 1px solid var(--border-danger);
}
.delete-character-btn {
    width: 100%;
    background-color: var(--bg-button-delete);
    color: var(--text-light);
}
.delete-character-btn:hover {
    background-color: var(--bg-button-delete-hover);
}
body.dark-mode .delete-character-btn {
    color: var(--text-light);
}

/* --- データ同期セクションのデザイン (最終確定版) --- */
#data-sync-group {
    padding: 20px 24px;
}

.sync-header h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    /* 他のh3と同様の罫線と余白を追加 */
    margin-bottom: var(--spacing-unit);
    border-bottom: 1px solid var(--border-primary);
    padding-bottom: var(--spacing-unit);
}
.sync-header h3 svg {
    width: 24px;
    height: 24px;
    fill: var(--text-primary);
    flex-shrink: 0;
}

.sync-description {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
    display: flex;
    align-items: center;
    gap: 8px;
}
/* リンク色の視認性を改善 */
.sync-description a {
    color: var(--text-link);
}

/* --- 連携前 --- */
.sync-primary-btn {
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    background-color: #0061ff;
    color: #fff;
    border-radius: var(--border-radius-sm);
    gap: 8px;
    text-transform: none;
}
.sync-primary-btn svg {
    width: 20px;
    height: 20px;
}
.sync-primary-btn:hover:not(:disabled) {
    background-color: #0052d9;
}

/* --- 連携後 --- */
.sync-setting-row {
    margin-bottom: 16px;
}
.sync-setting-row label {
    /* 他のラベルと同様のスタイル */
    display: block;
    margin-bottom: var(--spacing-unit);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
}
.sync-setting-row select {
    /* 他のselectと同様に全幅を使用 */
    width: 100%;
    margin-bottom: 0;
}
.sync-setting-row input {
    margin-bottom: 0;
}
.sync-field-note {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 6px;
    line-height: 1.6;
}

.sync-status-indicator {
    display: inline-flex;
    align-items: center;
    /* 背景、パディング、角丸を削除してシンプルに */
    background-color: transparent;
    padding: 0;
    color: inherit; /* 親要素の色を継承 */
}


.sync-status-indicator .status-icon {
    font-size: 16px;
}

.sync-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 24px;
}
.sync-actions button {
    width: 100%;
    padding: 10px 12px;
    font-size: 0.8rem;
    justify-content: center;
}

#dropbox-sync-btn {
    background-color: var(--bg-button-save);
}
#dropbox-sync-btn:hover {
    background-color: var(--bg-button-save-hover);
}

#dropbox-disconnect-btn {
    background-color: var(--bg-button-delete);
}
#dropbox-disconnect-btn:hover {
    background-color: var(--bg-button-delete-hover);
}

/* Status Icon Colors */
#sync-status-indicator[data-status="idle"] .status-icon { color: #4caf50; }
#sync-status-indicator[data-status="dirty"] .status-icon { color: #ffa000; }
#sync-status-indicator[data-status="syncing"] .status-icon { color: var(--text-link); animation: spin 1.5s linear infinite; }
#sync-status-indicator[data-status="error"] .status-icon { color: #f44336; }



/* --- リンク色の視認性改善 (ダークモード) --- */
body.dark-mode {
    --text-link: #90caf9; /* 明るいブルーに変更 */
}

/* --- Sync Status Header Icon --- */
.sync-status-header-icon {
    font-family: 'Material Symbols Outlined';
    font-size: 22px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.3s ease-in-out, transform 0.3s ease-in-out;
    padding: 4px;
    border-radius: 50%;
    display: inline-block; /* 常に表示されるように変更 */
}

.sync-status-header-icon:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Status Styles */
.sync-status-header-icon[data-status="not-connected"] {
    color: var(--text-secondary); /* グレー */
}
.sync-status-header-icon[data-status="idle"] {
    color: #4caf50; /* 緑 */
}
.sync-status-header-icon[data-status="dirty"] {
    color: #ffa000; /* 黄/オレンジ */
}
.sync-status-header-icon[data-status="syncing"] {
    color: var(--text-link); /* 青 */
    animation: spin 1.5s linear infinite;
}
.sync-status-header-icon[data-status="error"] {
    color: #f44336; /* 赤 */
}

/* --- Sync Error Display --- */
.sync-error-display {
    background-color: var(--bg-error-message);
    border: 1px solid var(--border-danger);
    border-radius: var(--border-radius-md);
    padding: 12px 16px;
    margin-bottom: 16px;
}
.sync-error-header {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-error);
    font-weight: 700;
    font-size: 0.9rem;
}
.sync-error-header .material-symbols-outlined {
    font-size: 20px;
}
.sync-error-message {
    font-size: 0.8rem;
    color: var(--text-error);
    margin-top: 8px;
    margin-bottom: 4px;
    white-space: pre-wrap;
    word-break: break-word;
}
.sync-error-timestamp {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}
.clear-sync-error-btn {
    font-size: 0.75rem;
    padding: 4px 12px;
    background-color: var(--bg-button-action);
    color: var(--text-light);
}
.sync-error-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.clear-sync-error-btn:hover {
    background-color: var(--bg-button-action-hover);
}
body.dark-mode .clear-sync-error-btn {
    color: var(--text-primary);
}

/* --- Sync Notification --- */
.sync-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 12px 20px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-3);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    animation: slide-up 0.5s ease-out forwards;
    opacity: 1;
    transition: opacity 0.5s ease-out;
}
.sync-notification.hidden {
    display: none;
}
.sync-notification.success {
    background-color: #e8f5e9;
    color: #1b5e20;
}
body.dark-mode .sync-notification.success {
    background-color: #1b5e20;
    color: #e8f5e9;
}
.sync-notification.error {
    background-color: var(--bg-error-message);
    color: var(--text-error);
}

/* --- Sync Progress Text --- */
.sync-progress-text {
    margin-left: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    font-style: italic;
}

/* --- Last Sync Time Display --- */
.last-sync-time-display {
    font-size: 11px;
    color: var(--text-secondary);
    text-align: left;
    margin-top: -16px; /* 上の要素との間隔を詰める */
    margin-bottom: 20px;
    padding-left: 4px;
    white-space: pre-line;
}

.sync-backup-panel {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-primary);
}

.sync-backup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.sync-backup-header h4 {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.sync-backup-header button {
    min-height: 40px;
    font-size: 0.75rem;
    text-transform: none;
    background-color: var(--bg-button-export);
    color: var(--text-light);
}

.sync-backup-header button:hover {
    background-color: var(--bg-button-export-hover);
}

.sync-snapshot-empty {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background-color: var(--bg-secondary);
    border: 1px dashed var(--border-secondary);
    border-radius: var(--border-radius-sm);
    padding: 12px;
}

.sync-snapshot-list {
    display: grid;
    gap: 12px;
}

.sync-snapshot-item {
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-secondary);
    padding: 12px;
}

.sync-snapshot-item-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
    margin-bottom: 8px;
}

.sync-snapshot-item-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sync-snapshot-item-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.sync-snapshot-item-meta {
    font-size: 0.78rem;
    color: var(--text-secondary);
    white-space: pre-line;
    line-height: 1.6;
}

.sync-snapshot-item-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.sync-snapshot-item-actions button {
    flex: 1 1 140px;
    min-height: 40px;
    font-size: 0.75rem;
    text-transform: none;
}

.sync-snapshot-restore-btn {
    background-color: var(--bg-button-save);
}

.sync-snapshot-restore-btn:hover {
    background-color: var(--bg-button-save-hover);
}

.sync-snapshot-delete-btn {
    background-color: var(--bg-button-action);
}

.sync-snapshot-delete-btn:hover {
    background-color: var(--bg-button-action-hover);
}

/* --- History Screen Enhancements --- */
.header-delete-button {
    color: var(--text-light);
    background-color: transparent;
    border-radius: 50%;
    padding: var(--spacing-unit);
    box-shadow: none;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.header-delete-button:hover:not(:disabled) {
    background-color: var(--bg-button-delete-hover);
}

.header-delete-button:disabled {
    color: var(--text-disabled);
    background-color: transparent;
}

body.dark-mode .header-delete-button:disabled {
    color: var(--text-disabled);
}

.history-item-details {
    display: flex;
    flex-direction: column;
    gap: 8px; /* タイトルと統計情報の間のスペース */
}

.history-item-stats {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 11px;
    color: var(--text-secondary);
}

.stat-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.stat-item .material-symbols-outlined {
    font-size: 14px;
}

/* --- User Attachment Preview --- */
.attachment-details .attachment-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 8px;
}

.attachment-details .attachment-list li {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 6px;
    border: 1px solid var(--border-tertiary);
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-secondary);
    max-width: 120px; /* サムネイルの最大幅 */
}

.attachment-details .attachment-thumbnail {
    width: 100px;
    height: 75px;
    object-fit: cover;
    border-radius: var(--border-radius-xs);
    background-color: var(--bg-tertiary);
    cursor: pointer;
}

.attachment-details .attachment-filename {
    font-size: 11px;
    color: var(--text-secondary);
    word-break: break-all;
    text-align: center;
    max-height: 2.4em; /* 2行までに制限 */
    overflow: hidden;
}

/* --- Stable Diffusion Settings --- */
#stable-diffusion-settings .sd-description {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: -10px;
    margin-bottom: 15px;
    line-height: 1.5;
}

#stable-diffusion-settings .settings-group-subsection {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-primary);
}

#sd-test-connection-btn {
    width: auto;
    padding: 8px 16px;
    font-size: 0.8rem;
    margin-top: 8px;
    background-color: var(--bg-button-action);
}

body.dark-mode #sd-test-connection-btn {
    color: var(--text-primary);
}

#sd-quality-checker-options {
    margin-top: 16px;
    padding-left: 20px;
    border-left: 2px solid var(--border-tertiary);
}

#sync-status-settings-icon {
    cursor: default;
}
/* --- API Usage Counter --- */
.api-usage-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-tertiary);
    padding: 8px 12px;
    border-radius: var(--border-radius-sm);
    margin-top: -4px;
    margin-bottom: 12px;
}
.api-usage-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}
.profile-menu-model-line {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 8px;
}

.profile-menu-model {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 1; /* モデル名が長い場合に縮むように */
}

.profile-menu-api-count {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: normal;
    white-space: nowrap;
    flex-shrink: 0; /* カウント表示は縮まないように */
}

/* --- Settings Screen Header Profile Card --- */
#settings-screen .app-header .profile-card {
    /* 既存の背景色とボーダーをリセット */
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);

    /* 新しいグラデーション背景を適用 */
    background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(0, 0, 0, 0.1));

    /* 立体感とグラスエフェクトを追加 */
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px); /* Safari向け */

    /* パディングと形状を調整 */
    padding: 4px 12px 4px 4px;
    border-radius: 20px;
    transition: all 0.2s ease-in-out;
}

#settings-screen .app-header .profile-card:hover {
    /* ホバー時に少し明るくする */
    background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(0, 0, 0, 0.15));
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* テキストの可読性を向上 */
#settings-screen .app-header .profile-card .profile-card-name,
#settings-screen .app-header .profile-card .profile-card-arrow {
    color: #ffffff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* アイコンコンテナの背景を調整してコントラストを改善 */
#settings-screen .app-header .profile-card .profile-icon-container {
    background-color: rgba(255, 255, 255, 0.1);
}

/* --- Debug Log Dialog Styles --- */
#debugLogDialog[open] {
    width: 95%;
    max-width: 800px;
    height: 80%;
    max-height: 700px;
    display: flex;
    flex-direction: column;
}

.log-container {
    height: 100%;
    overflow-y: auto;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--border-radius-sm);
    padding: 8px;
    font-family: 'Menlo', 'Monaco', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
    flex-grow: 1;
}

.log-entry {
    padding: 4px 6px;
    border-bottom: 1px solid var(--border-tertiary);
    white-space: pre-wrap;
    word-break: break-all;
}
.log-entry:last-child {
    border-bottom: none;
}

.log-entry .log-timestamp {
    color: #999;
    margin-right: 8px;
}
.log-entry .log-type {
    font-weight: bold;
    margin-right: 8px;
    text-transform: uppercase;
}

.log-entry.log-type-log { color: var(--text-primary); }
.log-entry.log-type-info { color: #2196F3; }
.log-entry.log-type-warn { color: #FFC107; }
.log-entry.log-type-error { color: #F44336; font-weight: bold; }

.log-actions-left {
    display: flex;
    gap: 10px;
}

.log-entry.collapsible {
    cursor: pointer;
}

.log-entry .log-summary,
.log-entry .log-full {
    /* 将来的なスタイリングのために定義 */
    display: inline;
}