/**
 * VoiceTube TransLive - 歷史字幕頁面樣式
 * 設計原則：與 simple.css 共用設計語言，極簡、系統化、零硬編碼
 */

/* Lucide icon defaults */
.lucide {
    width: 18px;
    height: 18px;
    stroke-width: 1.75;
    vertical-align: -0.15em;
    flex-shrink: 0;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Header (同 simple.css 設計語言) ===== */
.subtitles-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--header-bg);
    border-bottom: var(--header-border, 1px solid var(--color-border));
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
}

.brand-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-icon-bg);
    border-radius: 10px;
    box-shadow: var(--brand-icon-shadow);
    color: var(--color-brand);
}

.brand-icon .lucide {
    width: 24px;
    height: 24px;
}

.brand-title {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-brand) 0%, var(--color-success) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-divider {
    width: 1px;
    height: 20px;
    background: var(--header-divider);
}

.page-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.header-right {
    display: flex;
    align-items: center;
}

/* ===== User Dropdown (同 simple.css) ===== */
.user-profile {
    position: relative;
}

.user-profile-main {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.user-profile-main:hover {
    background: rgba(var(--overlay-rgb), 0.06);
}

.user-name {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.dropdown-arrow {
    color: var(--color-text-tertiary);
    transition: transform var(--transition-fast);
    display: flex;
}

.dropdown-arrow .lucide {
    width: 14px;
    height: 14px;
}

.user-profile.expanded .dropdown-arrow {
    transform: rotate(180deg);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 200px;
    margin-top: 6px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all var(--transition-fast);
    z-index: 1000;
    padding: 4px 0;
}

.user-profile.expanded .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 15px;
    transition: background var(--transition-fast);
}

.dropdown-menu-toggle:hover {
    background: rgba(var(--overlay-rgb), 0.05);
}

.menu-toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-primary);
}

.menu-toggle-label .lucide {
    width: 16px;
    height: 16px;
}

.ui-lang-select {
    appearance: none;
    -webkit-appearance: none;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text-primary);
    font-size: 13px;
    padding: 4px 8px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
}
.ui-lang-select:hover { border-color: var(--color-brand); }

.dropdown-menu-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 10px 15px;
    background: transparent;
    border: none;
    font-size: 14px;
    color: var(--color-text-primary);
    cursor: pointer;
    text-decoration: none;
    transition: background var(--transition-fast);
}

.dropdown-menu-btn:hover {
    background: rgba(var(--overlay-rgb), 0.05);
}

.dropdown-menu-btn .menu-icon {
    opacity: 0.4;
    display: flex;
}

.dropdown-menu-btn .menu-icon .lucide {
    width: 14px;
    height: 14px;
}

/* Toggle switch (同 simple.css) */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: var(--toggle-track);
    transition: background-color var(--transition-normal);
    border-radius: 24px;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--toggle-knob, #fff);
    transition: transform var(--transition-normal);
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--color-brand);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

.dropdown-divider {
    height: 1px;
    background: rgba(var(--overlay-rgb), 0.08);
    margin: 4px 0;
}

.dropdown-logout-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 10px 15px;
    background: transparent;
    border: none;
    font-size: 14px;
    color: var(--color-error);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.dropdown-logout-btn:hover {
    background: rgba(var(--error-rgb), 0.06);
}

.dropdown-logout-btn .logout-icon {
    opacity: 0.4;
    display: flex;
}

.dropdown-logout-btn .logout-icon .lucide {
    width: 14px;
    height: 14px;
}

/* ===== Main Layout ===== */
.subtitles-container {
    display: flex;
    height: calc(100vh - 77px);
}

/* ===== Sessions Panel (左側) ===== */
.sessions-panel {
    width: 380px;
    min-width: 380px;
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 {
    margin: 0;
    color: var(--color-text-primary);
    font-size: 16px;
    font-weight: 600;
}

.btn-refresh {
    background: var(--btn-secondary-bg);
    border: 1px solid var(--btn-secondary-border);
    color: var(--color-text-secondary);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-refresh .lucide {
    width: 16px;
    height: 16px;
}

.btn-refresh:hover {
    color: var(--color-text-primary);
    background: var(--btn-secondary-hover-bg);
    border-color: var(--color-text-tertiary);
}

.btn-refresh:hover .lucide {
    animation: spin 0.6s ease-in-out;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== Search Bar ===== */
.search-bar {
    padding: 8px 12px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-bar .lucide {
    width: 16px;
    height: 16px;
    color: var(--color-text-tertiary);
    flex-shrink: 0;
}

.search-bar input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-size: 13px;
    color: var(--color-text-primary);
    padding: 4px 0;
}

.search-bar input::placeholder {
    color: var(--color-text-tertiary);
}

/* ===== Sessions List ===== */
.sessions-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

/* ===== Session Cards ===== */
.session-card {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    margin-bottom: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.session-card:hover {
    border-color: var(--color-border-hover);
    background: var(--color-bg-tertiary);
}

.session-card.active {
    border-color: var(--color-brand);
    background: rgba(var(--brand-rgb), 0.06);
}

.session-card.keyboard-focus {
    border-color: var(--color-brand);
    box-shadow: 0 0 0 1px var(--color-brand);
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
}

.session-title-group {
    flex: 1;
    min-width: 0;
}

.session-time {
    color: var(--color-text-primary);
    font-size: 14px;
    font-weight: 500;
}

.session-ai-title {
    color: var(--color-text-primary);
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.session-time-sub {
    color: var(--color-text-tertiary);
    font-size: 12px;
    margin-top: 2px;
}

.session-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.session-line-count {
    color: var(--color-text-tertiary);
    font-size: 12px;
}

.btn-delete-session {
    background: transparent;
    border: none;
    color: var(--color-text-tertiary);
    padding: 4px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
}

.btn-delete-session .lucide {
    width: 14px;
    height: 14px;
}

.session-card:hover .btn-delete-session {
    opacity: 0.5;
}

.btn-delete-session:hover {
    opacity: 1 !important;
    color: var(--color-error);
    background: rgba(var(--error-rgb), 0.08);
}

.session-lang {
    margin-top: 6px;
    color: var(--color-text-secondary);
    font-size: 12px;
}

/* Empty state for sessions */
.empty-state-sessions {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    color: var(--color-text-secondary);
    gap: 12px;
}

.empty-state-sessions p {
    margin: 0;
    font-size: 13px;
    color: var(--color-text-tertiary);
}

.btn-start {
    font-size: 13px;
    color: var(--color-brand);
    text-decoration: none;
    padding: 6px 16px;
    border: 1px solid var(--color-brand);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.btn-start:hover {
    background: rgba(var(--brand-rgb), 0.08);
}

/* 更多記錄提示 */
.info-message {
    padding: 12px;
    margin: 8px 0;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--color-text-secondary);
    text-align: center;
}

/* ===== Preview Panel (右側) ===== */
.preview-panel {
    flex: 1;
    background: var(--color-bg-primary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Empty / Error State */
.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    min-height: 200px;
    padding: 40px 20px;
}

.empty-icon {
    margin-bottom: 16px;
    color: var(--color-text-tertiary);
    opacity: 0.3;
}

.empty-icon .lucide {
    width: 48px;
    height: 48px;
}

.empty-state h3 {
    color: var(--color-text-primary);
    margin: 0 0 6px 0;
    font-size: 16px;
    font-weight: 600;
}

.empty-state p {
    margin: 0;
    font-size: 13px;
    color: var(--color-text-tertiary);
}

/* ===== Preview Content ===== */
.preview-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.preview-header {
    padding: 16px 24px;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-info h3 {
    margin: 0 0 6px 0;
    color: var(--color-text-primary);
    font-size: 16px;
    font-weight: 600;
}

.preview-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.meta-item {
    color: var(--color-text-secondary);
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.meta-item::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--color-text-tertiary);
}

.meta-item:first-child::before {
    display: none;
}

/* ===== Preview Actions ===== */
.preview-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.btn-icon {
    background: var(--btn-secondary-bg);
    color: var(--color-text-secondary);
    border: 1px solid var(--btn-secondary-border);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-icon .lucide {
    width: 16px;
    height: 16px;
}

.btn-icon:hover {
    color: var(--color-text-primary);
    background: var(--btn-secondary-hover-bg);
    border-color: var(--color-text-tertiary);
}

.btn-icon.copied {
    color: var(--color-success);
    border-color: var(--color-success);
}

.format-select {
    background: var(--btn-secondary-bg);
    color: var(--color-text-secondary);
    border: 1px solid var(--btn-secondary-border);
    padding: 7px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    outline: none;
    transition: all var(--transition-fast);
}

.format-select:hover,
.format-select:focus {
    color: var(--color-text-primary);
    border-color: var(--color-text-tertiary);
}

.btn-download {
    background: var(--btn-secondary-bg);
    color: var(--color-text-secondary);
    border: 1px solid var(--btn-secondary-border);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
}

.btn-download .lucide {
    width: 14px;
    height: 14px;
}

.btn-download:hover {
    color: var(--color-text-primary);
    background: var(--btn-secondary-hover-bg);
    border-color: var(--color-text-tertiary);
}

/* ===== Subtitle Lines ===== */
.subtitles-preview {
    flex: 1;
    overflow-y: auto;
    padding: 8px 24px;
}

.subtitle-line {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
}

.subtitle-line:last-child {
    border-bottom: none;
}

.subtitle-original {
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text-primary);
}

.subtitle-translation {
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* ===== Load More Button ===== */
.btn-load-more {
    display: block;
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-load-more:hover {
    color: var(--color-text-primary);
    border-color: var(--color-text-tertiary);
}

/* ===== Delete Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.modal-box {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    min-width: 320px;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform var(--transition-fast);
}

.modal-overlay.visible .modal-box {
    transform: scale(1);
}

.modal-box h3 {
    margin: 0 0 8px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
}

.modal-box p {
    margin: 0 0 20px 0;
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

.btn-modal-cancel {
    padding: 8px 16px;
    background: var(--btn-secondary-bg);
    border: 1px solid var(--btn-secondary-border);
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-modal-cancel:hover {
    color: var(--color-text-primary);
    background: var(--btn-secondary-hover-bg);
}

.btn-modal-confirm {
    padding: 8px 16px;
    background: var(--color-error);
    border: none;
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-modal-confirm:hover {
    opacity: 0.9;
}

/* ===== Loading State ===== */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--color-text-secondary);
}

.spinner {
    width: 28px;
    height: 28px;
    border: 2px solid var(--color-border);
    border-top: 2px solid var(--color-brand);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 12px;
}

.loading-state p {
    margin: 0;
    font-size: 13px;
    color: var(--color-text-tertiary);
}

/* ===== Scrollbar ===== */
.sessions-list::-webkit-scrollbar,
.subtitles-preview::-webkit-scrollbar {
    width: 6px;
}

.sessions-list::-webkit-scrollbar-track,
.subtitles-preview::-webkit-scrollbar-track {
    background: transparent;
}

.sessions-list::-webkit-scrollbar-thumb,
.subtitles-preview::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 3px;
}

.sessions-list::-webkit-scrollbar-thumb:hover,
.subtitles-preview::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .sessions-panel {
        width: 320px;
        min-width: 320px;
    }
}

@media (max-width: 768px) {
    .subtitles-header {
        padding: 12px 16px;
    }

    .header-divider,
    .page-label {
        display: none;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
    }

    .brand-icon .lucide {
        width: 20px;
        height: 20px;
    }

    .brand-title {
        font-size: 16px;
    }

    .subtitles-container {
        flex-direction: column;
        height: calc(100vh - 61px);
    }

    .sessions-panel {
        width: 100%;
        min-width: unset;
        max-height: 40vh;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
    }

    .preview-panel {
        flex: 1;
    }

    .preview-header {
        padding: 14px 16px;
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .preview-actions {
        width: 100%;
    }

    .btn-download {
        flex: 1;
        justify-content: center;
    }

    .subtitles-preview {
        padding: 12px 16px;
    }

    .user-name {
        display: none;
    }
}

@media (max-width: 480px) {
    .brand-title {
        font-size: 15px;
    }

    .panel-header {
        padding: 12px 16px;
    }

    .panel-header h2 {
        font-size: 15px;
    }

    .sessions-list {
        padding: 6px;
    }

    .session-card {
        padding: 12px 14px;
    }

    .search-bar {
        padding: 6px 10px;
    }
}

/* ===== AI Title Fade-in Animation ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-2px); }
    to { opacity: 1; transform: translateY(0); }
}

.session-ai-title.fade-in,
.session-time-sub.fade-in {
    animation: fadeIn 0.3s ease-out both;
}