/* ============================================
   CSS Variables
============================================= */
:root {
    --bg-gradient-start: #f0f4f8;
    --bg-gradient-end: #e2e8f0;
    --bg-card: #ffffff;
    --editor-bg: #1a1f2e;
    --audio-track-bg: #242b3d;
    --transcript-track-bg: #2d3548;
    --track-border: #3d4558;
    --pill-bg-gradient-start: #667eea;
    --pill-bg-gradient-end: #764ba2;
    --pill-text: #ffffff;
    --accent-primary: #667eea;
    --reader-bg: rgba(255, 255, 255, 0.95);
    --reader-text: #1f2937;
    --highlight-word: #2563eb;
    --highlight-bg: #dbeafe;
    --unmatched-color: #ef4444;
}

/* ============================================
   Base Styles
============================================= */
* { box-sizing: border-box; }

body { 
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    font-family: 'Inter', sans-serif;
    color: #1e293b;
    min-height: 100vh;
    padding: 20px 0 100px 0;
}

.main-container { 
    max-width: 1400px; 
    margin: 0 auto; 
    padding: 0 20px; 
}

/* ============================================
   App Header
============================================= */
.app-header {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--pill-bg-gradient-end) 100%);
    color: white; 
    padding: 24px 32px; 
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.3);
    margin-bottom: 32px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center;
}

.version-badge {
    background: rgba(255, 255, 255, 0.25); 
    padding: 8px 16px; 
    border-radius: 50px;
    font-weight: 700; 
    font-size: 14px; 
    backdrop-filter: blur(10px);
}

/* ============================================
   Input Card & Tabs
============================================= */
.input-card {
    background: var(--bg-card); 
    border-radius: 20px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08); 
    border: 1px solid rgba(0, 0, 0, 0.05);
    margin-bottom: 32px; 
    overflow: hidden; 
    position: relative;
}

.nav-tabs .nav-link { 
    color: #64748b; 
    font-weight: 600; 
    border: none; 
    padding: 1rem 1.5rem; 
}

.nav-tabs .nav-link.active { 
    color: var(--accent-primary); 
    border-bottom: 3px solid var(--accent-primary); 
    background: transparent; 
}

/* ============================================
   Quill Editor Styles
============================================= */
#quill-editor { 
    height: 300px; 
    font-family: 'Lora', serif; 
    font-size: 18px; 
    line-height: 1.8; 
    color: #333; 
    border: none; 
}

.ql-container.ql-snow { 
    border: none !important; 
}

.ql-toolbar.ql-snow { 
    border: none !important; 
    border-bottom: 1px solid #f0f0f0 !important; 
    background: #fafafa; 
}

.editor-actions {
    background: #fafafa; 
    border-top: 1px solid #eee; 
    padding: 15px 20px;
    display: flex; 
    justify-content: space-between; 
    align-items: center;
}

/* ============================================
   Bulk Editor (Notion-like)
============================================= */
.notion-editor-wrapper {
    position: relative;
    min-height: 500px;
    background: #fff;
    padding: 40px;
    font-family: 'Lora', serif;
}

#bulk-editor {
    outline: none;
    font-size: 18px;
    line-height: 1.8;
    color: #333;
    min-height: 60vh;
    height: auto; 
    overflow-y: visible; 
    padding-bottom: 100px;
}

#bulk-editor p { margin-bottom: 1em; }
#bulk-editor h1 { 
    font-size: 2em; 
    font-weight: bold; 
    margin: 1em 0 0.5em; 
    font-family: 'Poppins', sans-serif; 
}
#bulk-editor h2 { 
    font-size: 1.5em; 
    font-weight: bold; 
    margin: 1em 0 0.5em; 
    font-family: 'Poppins', sans-serif; 
}
#bulk-editor h3 { 
    font-size: 1.2em; 
    font-weight: bold; 
    margin: 1em 0 0.5em; 
    font-family: 'Poppins', sans-serif; 
}

/* ============================================
   Floating Action Buttons
============================================= */
.floating-controls {
    position: fixed;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 1000;
}

.floating-btn {
    width: 60px; 
    height: 60px;
    border-radius: 50%;
    border: none;
    color: white;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: all 0.3s;
    display: flex; 
    align-items: center; 
    justify-content: center;
    font-size: 24px;
    position: relative;
}

.floating-btn:hover { transform: scale(1.1); }
.floating-btn.chapter-btn { background: linear-gradient(135deg, #FF6B6B 0%, #EE5253 100%); }
.floating-btn.section-btn { background: linear-gradient(135deg, #4834d4 0%, #686de0 100%); }

.tooltip-text {
    position: absolute; 
    right: 70px; 
    background: rgba(0,0,0,0.7);
    color: white; 
    padding: 5px 10px; 
    border-radius: 5px; 
    font-size: 12px;
    opacity: 0; 
    pointer-events: none; 
    transition: opacity 0.2s; 
    white-space: nowrap;
}

.floating-btn:hover .tooltip-text { opacity: 1; }

/* ============================================
   Chapter/Section Markers
============================================= */
.editor-marker {
    padding: 15px;
    margin: 20px 0;
    border-radius: 10px;
    user-select: none;
    cursor: default;
    position: relative;
    border: 1px solid rgba(0,0,0,0.1);
}

.chapter-marker {
    background: #fff0f0; 
    border-left: 5px solid #FF6B6B;
}

.section-marker {
    background: #f0f0ff; 
    border-left: 5px solid #4834d4;
    margin-left: 20px;
}

.marker-header {
    display: flex; 
    align-items: center; 
    gap: 15px; 
    flex-wrap: wrap;
}

.marker-title { 
    font-family: 'Poppins', sans-serif; 
    font-weight: 700; 
    text-transform: uppercase; 
    letter-spacing: 1px; 
    font-size: 14px; 
}

.chapter-marker .marker-title { color: #d63031; }
.section-marker .marker-title { color: #4834d4; }

.marker-controls { 
    display: flex; 
    align-items: center; 
    gap: 10px; 
}

/* ============================================
   Audio Control Panel
============================================= */
.control-panel {
    background: var(--bg-card); 
    border-radius: 16px; 
    padding: 15px 25px; 
    margin-bottom: 24px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08); 
    display: flex; 
    gap: 16px; 
    flex-wrap: wrap; 
    align-items: center; 
    justify-content: space-between;
}

/* ============================================
   Timeline/Waveform Editor
============================================= */
.timeline-wrapper {
    background-color: var(--editor-bg); 
    border-radius: 20px; 
    position: relative;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2); 
    overflow-x: scroll; 
    overflow-y: hidden;
    margin-bottom: 40px; 
    padding-bottom: 10px;
}

.timeline-wrapper::-webkit-scrollbar { 
    height: 12px; 
    background: #1a1f2e; 
}

.timeline-wrapper::-webkit-scrollbar-thumb { 
    background: #4b5563; 
    border-radius: 10px; 
    border: 2px solid #1a1f2e; 
}

.timeline-content { 
    position: relative; 
    min-width: 100%; 
}

#timeline-ruler { 
    height: 25px; 
    background: #1a1f2e; 
    border-bottom: 1px solid var(--track-border); 
    position: sticky; 
    top: 0; 
    z-index: 50; 
}

.audio-track-container { 
    background: var(--audio-track-bg); 
    border-bottom: 3px solid var(--track-border); 
    height: 120px; 
    padding: 10px 0; 
    position: relative; 
}

.transcription-track-container { 
    background: var(--transcript-track-bg); 
    height: 120px; 
    padding: 10px 0; 
    position: relative; 
}

.track-label {
    position: absolute; 
    left: 20px; 
    top: 10px; 
    font-size: 10px; 
    font-weight: 800;
    letter-spacing: 2px; 
    text-transform: uppercase; 
    color: rgba(255,255,255,0.5);
    background: rgba(0,0,0,0.3); 
    padding: 4px 10px; 
    border-radius: 6px; 
    z-index: 100; 
    pointer-events: none;
}

/* ============================================
   Playhead
============================================= */
#custom-playhead {
    position: absolute; 
    top: 0; 
    bottom: 0; 
    width: 2px; 
    background-color: #ef4444;
    z-index: 300; 
    left: 0; 
    cursor: ew-resize; 
    pointer-events: all;
}

#custom-playhead::after {
    content: ''; 
    position: absolute; 
    top: 0; 
    left: -6px;
    border-left: 7px solid transparent; 
    border-right: 7px solid transparent; 
    border-top: 10px solid #ef4444;
}

/* ============================================
   Word Pills (Transcription)
============================================= */
.word-pill {
    position: absolute; 
    display: flex; 
    align-items: center; 
    justify-content: center;
    background: linear-gradient(135deg, var(--pill-bg-gradient-start) 0%, var(--pill-bg-gradient-end) 100%);
    color: var(--pill-text); 
    border-radius: 4px; 
    font-size: 12px; 
    font-weight: 600;
    cursor: grab; 
    border: 1px solid rgba(255,255,255,0.2); 
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    top: 50%; 
    transform: translateY(-50%); 
    white-space: nowrap; 
    overflow: hidden;
    text-overflow: ellipsis; 
    user-select: none; 
    z-index: 200; 
    padding: 0 5px;
}

.word-pill.selected { 
    border-color: #fcd34d; 
    box-shadow: 0 0 0 2px rgba(252, 211, 77, 0.4); 
    z-index: 210; 
}

.resize-handle { 
    position: absolute; 
    top: 0; 
    bottom: 0; 
    width: 5px; 
    cursor: ew-resize; 
    z-index: 220; 
}

.resize-handle-left { left: 0; }
.resize-handle-right { right: 0; }

/* ============================================
   Interactive Reader
============================================= */
.reader-section {
    background-color: var(--reader-bg); 
    backdrop-filter: blur(12px); 
    border-radius: 1rem;
    padding: 3rem 4rem; 
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.08); 
    border: 1px solid rgba(255, 255, 255, 0.4);
    margin-top: 40px; 
    animation: fadeIn 0.5s ease-in-out; 
    min-height: 400px;
}

.reader-header {
    font-family: "Poppins", sans-serif; 
    font-weight: 700; 
    font-size: 1.5rem;
    color: #111827; 
    margin-bottom: 1rem; 
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 1rem; 
    display: flex; 
    justify-content: space-between; 
    align-items: center;
}

.story-text-container { 
    font-family: "Lora", serif; 
    font-size: 24px; 
    line-height: 2.1; 
    color: var(--reader-text); 
    cursor: text; 
}

.story-text-container h1, 
.story-text-container h2 { 
    font-family: "Poppins", sans-serif; 
    margin-top: 1.5em; 
    font-weight: 700; 
}

.story-text-container p { margin-bottom: 1.2em; }

/* ============================================
   Word Highlighting
============================================= */
.word {
    transition: background-color 0.15s; 
    border-radius: 3px; 
    padding: 2px 0;
    display: inline; 
    cursor: pointer; 
    border-bottom: 2px solid transparent;
}

.word:hover { background-color: #f1f5f9; }

.show-mismatches .word.unmatched { 
    color: var(--unmatched-color); 
    text-decoration: underline wavy var(--unmatched-color); 
    opacity: 1 !important; 
}

.current-word { 
    color: var(--highlight-word); 
    text-decoration: underline; 
    text-decoration-thickness: 3px; 
    text-underline-offset: 3px; 
    font-weight: 700; 
}

.current-sentence-bg { 
    background-color: var(--highlight-bg); 
    box-decoration-break: clone; 
    -webkit-box-decoration-break: clone; 
    border-radius: 6px; 
}

/* ============================================
   Loading Overlay
============================================= */
.loading-overlay {
    display: none; 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%;
    background: rgba(255,255,255,0.9); 
    z-index: 9999; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center;
}

/* ============================================
   Library Modal Items
============================================= */
.library-item {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
}

.library-item:hover {
    background: #f1f5f9;
    border-color: var(--accent-primary);
}

.library-item-info { flex: 1; }
.library-item-title { 
    font-weight: 600; 
    color: #1e293b; 
    margin-bottom: 4px; 
}
.library-item-meta { 
    font-size: 12px; 
    color: #64748b; 
}
.library-item-actions { 
    display: flex; 
    gap: 8px; 
}

/* ============================================
   Database Stats
============================================= */
.db-stats {
    background: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 100%);
    border-radius: 12px;
    padding: 15px 20px;
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.stat-item { text-align: center; }
.stat-value { 
    font-size: 24px; 
    font-weight: 700; 
    color: var(--accent-primary); 
}
.stat-label { 
    font-size: 12px; 
    color: #64748b; 
    text-transform: uppercase; 
    letter-spacing: 1px; 
}

/* ============================================
   Animations
============================================= */
@keyframes fadeIn { 
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    } 
    to { 
        opacity: 1; 
        transform: translateY(0); 
    } 
}

/* ============================================
   Image Upload Styles for Section Markers
============================================= */
.section-image-container {
    margin: 10px 0;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 8px;
    border: 2px dashed #dee2e6;
    transition: all 0.3s ease;
}

.section-image-container.drag-over {
    border-color: #667eea;
    background: #f0f4ff;
}

.section-image-container.has-image {
    border-style: solid;
    border-color: #28a745;
    background: #f8fff8;
}

.image-drop-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80px;
    cursor: pointer;
    color: #6c757d;
    font-size: 14px;
}

.image-drop-zone i {
    font-size: 24px;
    margin-bottom: 8px;
    color: #adb5bd;
}

.image-drop-zone:hover {
    color: #495057;
}

.image-drop-zone:hover i {
    color: #667eea;
}

.image-preview-wrapper {
    position: relative;
    display: inline-block;
    max-width: 100%;
}

.section-image-preview {
    max-width: 200px;
    max-height: 150px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    object-fit: contain;
}

.image-actions {
    position: absolute;
    top: 5px;
    right: 5px;
    display: flex;
    gap: 5px;
}

.image-actions button {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.9);
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: all 0.2s;
}

.image-actions button:hover {
    transform: scale(1.1);
}

.image-actions .btn-remove:hover {
    background: #dc3545;
    color: white;
}

.image-info {
    font-size: 11px;
    color: #6c757d;
    margin-top: 5px;
    text-align: center;
}

/* Hidden file input */
.image-file-input {
    display: none;
}

/* Save Button Styles */
.save-project-btn {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    border: none;
    color: white;
    font-weight: bold;
    padding: 8px 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.save-project-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
    color: white;
}

.save-project-btn:active {
    transform: translateY(0);
}

/* Section marker with image indicator */
.section-marker.has-image .marker-title::after {
    content: '🖼️';
    margin-left: 8px;
    font-size: 12px;
}

/* Image in editor content area */
.section-content-image {
    display: block;
    max-width: 300px;
    max-height: 200px;
    margin: 10px 0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* ============================================
   User Menu Styles
============================================= */
.dropdown-menu {
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(0, 0, 0, 0.05);
    padding: 8px;
}

.dropdown-item {
    border-radius: 8px;
    padding: 10px 16px;
    font-weight: 500;
    transition: all 0.2s;
}

.dropdown-item:hover {
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--pill-bg-gradient-end) 100%);
    color: white;
}

.dropdown-item i {
    width: 20px;
}

.dropdown-divider {
    margin: 8px 0;
}