/* === MOBILE-FIRST DESIGN SYSTEM === */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

:root {
    /* iOS Colors */
    --ios-blue: #007AFF;
    --ios-blue-light: #5AC8FA;
    --ios-green: #34C759;
    --ios-red: #FF3B30;
    --ios-orange: #FF9500;
    --ios-gray: #8E8E93;
    --ios-gray-2: #AEAEB2;
    --ios-gray-3: #C7C7CC;
    --ios-gray-4: #D1D1D6;
    --ios-gray-5: #E5E5EA;
    --ios-gray-6: #F2F2F7;
    
    /* Backgrounds */
    --bg-primary: #F2F2F7;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #FAFAFA;
    
    /* Text */
    --text-primary: #000000;
    --text-secondary: #3C3C43;
    --text-tertiary: #3C3C4399;
    --text-quaternary: #3C3C4360;
    
    /* System Font */
    --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    
    /* Spacing (using 8px grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    
    /* Radius */
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 17px;
    line-height: 1.47059;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === LAYOUT === */
.app-container {
    min-height: 100vh;
    background: var(--bg-primary);
}

.app-header {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--ios-gray-4);
    padding: var(--space-4);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 980px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 44px;
}

.app-title {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.4px;
}

.header-actions {
    display: flex;
    gap: var(--space-2);
}

.main-content {
    max-width: 980px;
    margin: 0 auto;
    padding: var(--space-6) var(--space-4) var(--space-12);
}

/* === BUTTONS === */
.btn {
    font-family: var(--font);
    font-size: 17px;
    font-weight: 600;
    padding: 11px 20px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    user-select: none;
    -webkit-user-select: none;
}

.btn:active:not(:disabled) {
    transform: scale(0.96);
    opacity: 0.8;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--ios-blue);
    color: white;
}

.btn-secondary {
    background: var(--ios-gray-6);
    color: var(--ios-blue);
}

.btn-success {
    background: var(--ios-green);
    color: white;
}

.btn-sm {
    font-size: 15px;
    padding: 6px 14px;
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--ios-gray-6);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 20px;
    transition: all 0.2s;
}

.icon-btn:active {
    transform: scale(0.9);
    background: var(--ios-gray-5);
}

/* === READER CONTAINER === */
.reader-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
}

.reader-header {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--ios-gray-4);
    padding: var(--space-4);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.reader-title {
    flex: 1;
}

.reader-title h2 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.progress-info {
    font-size: 13px;
    color: var(--text-tertiary);
}

.progress-bar {
    height: 4px;
    background: var(--ios-gray-5);
    border-radius: 2px;
    margin-top: var(--space-2);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--ios-blue);
    transition: width 0.3s ease;
}

.reader-actions {
    display: flex;
    gap: var(--space-2);
}

/* === READER CONTENT === */
.reader-content {
    flex: 1;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: var(--space-8) var(--space-4) var(--space-12);
    font-family: 'Merriweather', serif;
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-primary);
    
    /* CRITICAL: Prevent layout breaking on Android/mobile */
    overflow-x: hidden;
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    box-sizing: border-box;
}

.section-content {
    margin-bottom: var(--space-8);
    
    /* Ensure sections don't overflow */
    max-width: 100%;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

.section-content p {
    margin-bottom: var(--space-5);
    max-width: 100%;
    overflow-wrap: break-word;
}

.section-content strong {
    font-weight: 700;
}

.section-content em {
    font-style: italic;
}

.section-content.translating {
    opacity: 0.9;
}

.streaming-text {
    /* Ensure streaming text wraps properly */
    word-wrap: break-word;
    overflow-wrap: break-word;
    word-break: break-word;
    max-width: 100%;
}

/* Handle long continuous characters like ==================== */
.reader-content pre,
.section-content pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    overflow-x: auto;
}

/* TL Notes styling */
.tl-note {
    color: var(--ios-gray);
    font-size: 0.9em;
    font-style: italic;
    margin-left: 4px;
}

/* Learned Terms Popup */
.learned-terms-popup {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.learned-terms-popup .popup-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.learned-terms-popup .popup-content {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    max-width: 400px;
    margin: var(--space-4);
    position: relative;
    z-index: 1;
    box-shadow: var(--shadow-lg);
}

.learned-terms-popup h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.learned-terms-popup p {
    margin-bottom: var(--space-5);
    color: var(--text-secondary);
}

.learned-terms-popup .popup-actions {
    display: flex;
    gap: var(--space-3);
}

.learned-terms-popup .popup-actions .btn {
    flex: 1;
}

/* Interruption Warning */
.interruption-warning {
    margin: var(--space-4) 0;
}

.streaming-text {
    white-space: pre-wrap;
    word-wrap: break-word;
}

.cursor {
    display: inline-block;
    width: 2px;
    height: 1.2em;
    background: var(--ios-blue);
    animation: blink 1s infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

/* === BOTTOM NAVIGATION === */
.bottom-nav {
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-top: 0.5px solid var(--ios-gray-4);
    padding: var(--space-4);
    position: sticky;
    bottom: 0;
    z-index: 100;
    display: flex;
    gap: var(--space-3);
    justify-content: center;
}

.bottom-nav .btn {
    flex: 1;
    max-width: 200px;
}

/* === CARDS === */
.card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 0.5px solid var(--ios-gray-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-body {
    padding: var(--space-5);
}

.card-title {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.card-subtitle {
    font-size: 15px;
    color: var(--text-tertiary);
}

/* === NOVEL CARDS === */
.novels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
}

.novel-card {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-5);
    cursor: pointer;
    position: relative;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

.novel-card:active {
    transform: scale(0.98);
}

.novel-card-title {
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -0.2px;
    margin-bottom: var(--space-2);
    padding-right: var(--space-8);
}

.novel-card-author {
    font-size: 15px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-2);
}

.novel-card-meta {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-3);
}

.novel-card-stats {
    font-size: 15px;
    color: var(--text-tertiary);
}

/* Edit Mode Controls */
.novel-edit-controls {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    display: none;
    gap: var(--space-2);
    z-index: 10;
}

.novel-card.edit-mode .novel-edit-controls {
    display: flex;
}

.novel-edit-btn,
.novel-delete-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.novel-edit-btn {
    background: rgba(0, 122, 255, 0.1);
    color: var(--ios-blue);
}

.novel-edit-btn:hover {
    background: rgba(0, 122, 255, 0.2);
}

.novel-edit-btn:active {
    transform: scale(0.9);
    background: var(--ios-blue);
    color: white;
}

.novel-delete-btn {
    background: rgba(255, 59, 48, 0.1);
    color: var(--ios-red);
}

.novel-delete-btn:hover {
    background: rgba(255, 59, 48, 0.2);
}

.novel-delete-btn:active {
    transform: scale(0.9);
    background: var(--ios-red);
    color: white;
}

/* === CHAPTER LIST === */
.chapters-container {
    padding: var(--space-4);
}

.chapter-item {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

.chapter-item:active {
    transform: scale(0.98);
    background: var(--ios-gray-6);
}

.chapter-info {
    flex: 1;
}

.chapter-title {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.chapter-meta {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.badge {
    font-size: 13px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.badge-blue { background: rgba(0, 122, 255, 0.1); color: var(--ios-blue); }
.badge-green { background: rgba(52, 199, 89, 0.1); color: var(--ios-green); }
.badge-orange { background: rgba(255, 149, 0, 0.1); color: var(--ios-orange); }
.badge-gray { background: var(--ios-gray-6); color: var(--ios-gray); }
.badge.canon { background: rgba(0, 122, 255, 0.1); color: var(--ios-blue); }
.badge.auto { background: rgba(52, 199, 89, 0.1); color: var(--ios-green); }
.badge.romanized { background: rgba(255, 149, 0, 0.1); color: var(--ios-orange); }
.badge.confidence { background: var(--ios-gray-6); color: var(--ios-gray); }

/* === FORMS === */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-2);
}

.form-control,
input[type="text"],
input[type="password"],
input[type="number"],
input[type="email"],
select,
textarea {
    width: 100%;
    font-family: var(--font);
    font-size: 17px;
    padding: 11px 14px;
    border: 1px solid var(--ios-gray-4);
    border-radius: var(--radius-sm);
    background: white;
    transition: all 0.2s;
}

.form-control:focus,
input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--ios-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

textarea.form-control,
textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.5;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.checkbox-group label {
    font-size: 15px;
    font-weight: 400;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

/* === FILE UPLOAD === */
.file-upload-area {
    border: 2px dashed var(--ios-gray-4);
    border-radius: var(--radius-md);
    padding: var(--space-8);
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--ios-gray-6);
}

.file-upload-area:hover {
    border-color: var(--ios-blue);
    background: rgba(0, 122, 255, 0.05);
}

.file-upload-icon {
    font-size: 48px;
    margin-bottom: var(--space-3);
}

.file-upload-text {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.file-upload-hint {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* === MODAL === */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    animation: fadeIn 0.2s;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    max-width: 540px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.modal-large {
    max-width: 720px;
}

.modal-header {
    padding: var(--space-5);
    border-bottom: 0.5px solid var(--ios-gray-5);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.close-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--ios-gray-6);
    border: none;
    font-size: 20px;
    font-weight: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.close-btn:active {
    transform: scale(0.9);
}

.modal-body {
    padding: var(--space-5);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--space-5);
    border-top: 0.5px solid var(--ios-gray-5);
    display: flex;
    gap: var(--space-3);
}

.modal-footer .btn {
    flex: 1;
}

/* === SETTINGS === */
.settings-section {
    margin-bottom: var(--space-6);
}

.settings-section h4 {
    font-size: 15px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-4);
}

.text-muted {
    color: var(--text-tertiary);
    font-size: 15px;
}

/* === GLOSSARY === */
.glossary-tabs {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.tab-btn {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: var(--ios-gray-6);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn.active {
    background: var(--ios-blue);
    color: white;
}

.glossary-container {
    max-height: 400px;
    overflow-y: auto;
}

.glossary-item {
    padding: var(--space-4);
    border-bottom: 0.5px solid var(--ios-gray-5);
}

.glossary-item:last-child {
    border-bottom: none;
}

.glossary-header {
    font-size: 17px;
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.glossary-meta {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-2);
}

.glossary-notes {
    font-size: 15px;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--space-2);
}

.glossary-ai-comment {
    font-size: 13px;
    color: var(--text-tertiary);
    background: var(--ios-gray-6);
    padding: var(--space-2) var(--space-3);
    border-radius: 6px;
    margin-bottom: var(--space-2);
}

.glossary-actions {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

/* === EMPTY STATE === */
.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-4);
}

.empty-state-icon,
.empty-icon {
    font-size: 64px;
    margin-bottom: var(--space-4);
    opacity: 0.3;
}

.empty-state-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.empty-state-subtitle {
    font-size: 17px;
    color: var(--text-tertiary);
    margin-bottom: var(--space-6);
}

.novel-detail {
    display: none;
}

.detail-header {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-bottom: var(--space-4);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.detail-title h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--space-2);
}

/* === MOBILE TEXT WRAPPING FIX === */
/* Prevent long lines from breaking mobile layout */
.reader-content,
.reader-content p,
.reader-content div,
.streaming-text,
.section-content {
    overflow-wrap: break-word;
    word-wrap: break-word;
    word-break: break-word;
    max-width: 100%;
}

.reader-container {
    overflow-x: hidden;
    width: 100%;
}

.reader-content {
    width: 100%;
    box-sizing: border-box;
}

/* Handle code blocks and pre-formatted text */
.reader-content pre,
.reader-content code,
.streaming-text pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    overflow-x: auto;
}

/* === ANIMATIONS === */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .app-title {
        font-size: 20px;
    }
    
    .novels-grid {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: var(--space-4);
    }
    
    .reader-content {
        padding: var(--space-6) var(--space-4);
        font-size: 17px;
    }
    
    .reader-header {
        flex-wrap: wrap;
    }
    
    .reader-title h2 {
        font-size: 17px;
    }
    
    .detail-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .bottom-nav .btn {
        flex: 1;
        max-width: none;
    }
    
    .checkbox-grid {
        grid-template-columns: 1fr;
    }
}

/* === DARK MODE === */
body.dark-theme {
    --bg-primary: #000000;
    --bg-secondary: #1C1C1E;
    --bg-tertiary: #2C2C2E;
    --text-primary: #FFFFFF;
    --text-secondary: #EBEBF5;
    --text-tertiary: #EBEBF599;
    --text-quaternary: #EBEBF560;
}

body.dark-theme .app-header,
body.dark-theme .reader-header,
body.dark-theme .bottom-nav {
    background: rgba(28, 28, 30, 0.72);
    border-color: rgba(84, 84, 88, 0.65);
}

body.dark-theme .card,
body.dark-theme .novel-card,
body.dark-theme .chapter-item,
body.dark-theme .modal-content,
body.dark-theme .detail-header {
    background: var(--bg-secondary);
}

body.dark-theme .form-control,
body.dark-theme input,
body.dark-theme select,
body.dark-theme textarea {
    background: var(--bg-tertiary);
    border-color: rgba(84, 84, 88, 0.65);
    color: var(--text-primary);
}

body.dark-theme .reader-container,
body.dark-theme .reader-content {
    background: var(--bg-primary);
    color: var(--text-primary);
}

body.dark-theme .file-upload-area {
    background: var(--bg-tertiary);
    border-color: rgba(84, 84, 88, 0.65);
}

body.dark-theme .glossary-ai-comment {
    background: var(--bg-tertiary);
}

.glossary-actions {
    margin-top: 12px;
    display: flex;
    gap: 8px;
}

.btn-danger {
    background: #FF3B30;
    color: white;
}

.btn-danger:hover {
    background: #FF2D1F;
}