/**
 * SRS Review Styles
 * Flashcard-based vocabulary review UI
 */

/* Overlay (Strict Mode) */
.srs-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    /* Darker, solid backdrop */
    backdrop-filter: blur(4px);
    z-index: 10000;
    /* High Z-Index */
    pointer-events: auto;
    /* Block interactions */
}

/* Main Panel */
.srs-panel {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -55%) scale(0.95);
    width: 92%;
    max-width: 600px;
    max-height: 90vh;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.25);
    z-index: 10001;
    display: flex;
    flex-direction: column;
    padding: 32px;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Centralized Desktop Layout */
@media (min-width: 1000px) {
    .srs-panel {
        max-width: 640px;
        /* Slightly wider for central bottom buttons */
    }
}

.srs-panel.active {
    display: flex;
    /* Ensure flex when active */
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

/* Header */
/* Header */
.srs-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
    background: transparent;
    padding: 0;
    border: none;
}

.srs-header h2 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: #111827;
    display: flex;
    align-items: center;
    gap: 8px;
}

.srs-close-btn {
    background: transparent;
    border: none;
    color: #9CA3AF;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px;
    transition: color 0.2s;
}

.srs-close-btn:hover {
    color: #111827;
    background: transparent;
}

/* Stats Row */
.srs-stats {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding: 0;
    background: transparent;
    border: none;
}

.srs-stats span {
    font-size: 0.875rem;
    color: #9CA3AF;
    font-weight: 500;
}

#srs-streak {
    color: #F59E0B;
}

/* Flashcard Container - NO SCROLL NEEDED */
.srs-flashcard-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 16px;
    margin-bottom: 32px;
    /* Increased margin to prevent overlap */
    flex-shrink: 0;
    /* Prevent shrinking */
    width: 100%;
}

/* SRS Element Box Sizing */
.srs-panel,
.srs-panel *,
.srs-overlay {
    box-sizing: border-box;
}

/* Flashcard */
.srs-flashcard {
    width: 100%;
    max-width: 420px;
    /* Consistently narrower */
    height: 380px;
    /* Increased from 320px to fit examples + results */
    perspective: 1000px;
    position: relative;
    z-index: 10;
}

.srs-flashcard-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.srs-flashcard.flipped .srs-flashcard-inner {
    transform: rotateY(180deg);
}

.srs-flashcard-front,
.srs-flashcard-back {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px;
    border-radius: var(--radius-xl);
    background: var(--primary-tonal);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    color: var(--text-main);
    overflow-y: hidden;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.srs-flashcard-front::after,
.srs-flashcard-back::after {
    content: '';
    position: absolute;
    top: 0;
    left: -150%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.4),
            transparent);
    transform: skewX(-20deg);
    transition: 0.6s;
}

.srs-flashcard:hover .srs-flashcard-front::after,
.srs-flashcard:hover .srs-flashcard-back::after {
    left: 150%;
}

.srs-flashcard-back {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    transform: rotateY(180deg);
}

/* Word Display */
.srs-word,
.srs-word-front {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-main) !important;
    margin-bottom: 8px;
    text-align: center;
    letter-spacing: -0.02em;
}

/* Pronunciation Row */
.srs-pronunciation-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.srs-phonetic,
.srs-phonetic-back {
    font-size: 15px;
    color: #6B7280 !important;
    font-family: 'Times New Roman', serif;
    background: transparent;
    padding: 0;
    margin: 0;
}

/* Small Audio Button */
.srs-audio-btn-small {
    background: var(--primary);
    border: none;
    color: white;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-pill);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.2);
}

.srs-audio-btn-small:hover {
    transform: scale(1.1);
    background: #2563eb;
}

.srs-audio-btn {
    background: linear-gradient(145deg, #3b82f6, #2563eb);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 12px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.srs-audio-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.srs-audio-btn:active {
    transform: scale(0.98);
}

/* Back of Card */
/* Vietnamese Translation */
.srs-vietnamese {
    font-size: 16px;
    font-weight: 600;
    color: #3B82F6;
    /* Blue accent */
    text-align: center;
    margin-bottom: 8px;
    display: block;
}

.srs-vietnamese:empty {
    display: none;
}

/* Definition */
.srs-definition {
    font-size: 15px;
    /* Slightly smaller */
    color: #374151 !important;
    text-align: center;
    line-height: 1.4;
    margin-bottom: 8px;
    font-weight: 400;

    /* Clamp text to avoid overflow */
    display: -webkit-box;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

#srs-example {
    font-size: 13px;
    color: #6B7280 !important;
    font-style: italic;
    opacity: 1 !important;
    text-align: center;
    margin-bottom: 4px;
    /* Reduced margin */

    /* Clamp text */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.srs-example::before {
    content: '"';
}

.srs-example::after {
    content: '"';
}

.srs-example:empty {
    display: none;
}

.srs-example:empty::before,
.srs-example:empty::after {
    content: none;
}

/* Controls - FIXED POSITION AREA */
.srs-controls {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 12px 0 8px 0;
    background: #FAFAFA;
    flex-shrink: 0;
}

.srs-quality-btns {
    display: flex;
    width: 100%;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 16px 0;
    margin-top: 8px;
    border-top: 1px solid #f3f4f6;

    /* Animation: Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.5s ease-in-out;
    max-height: 0;
    overflow: hidden;
    pointer-events: none;
}

.srs-quality-btns.visible {
    /* Animation: Show */
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    max-height: 300px;
    /* Allow enough space */
    pointer-events: auto;
}

.srs-skip-btn {
    margin-top: 8px;
    padding: 8px 20px;
    background: transparent;
    border: 1px solid #d1d5db;
    border-radius: 20px;
    color: #6b7280;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.srs-skip-btn:hover {
    background: #f3f4f6;
    border-color: #9ca3af;
    color: #374151;
}

.srs-quality-prompt {
    font-size: 15px;
    font-weight: 600;
    color: #374151;
    margin: 0 0 8px 0;
    text-align: center;
}

.srs-quality-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    width: 100%;
    max-width: 100%;
    gap: 8px;
}

/* Base Quality Button */
.quality-option {
    width: 100%;
    padding: 12px 8px;
    border: none;
    border-radius: 12px;
    background: #ffffff;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    min-height: 70px;
}

.quality-option:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.quality-option:active {
    transform: scale(0.96);
}

/* Keyboard hint */
.quality-kbd {
    font-size: 10px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.7);
    background: rgba(0, 0, 0, 0.15);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', 'Monaco', monospace;
}

/* Label */
.quality-label {
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Interval */
.quality-interval {
    font-size: 11px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
}

/* Again Button - Red */
.quality-again {
    background: linear-gradient(145deg, #ef4444, #dc2626);
}

.quality-again:hover {
    background: linear-gradient(145deg, #f87171, #ef4444);
}

/* Hard Button - Orange */
.quality-hard {
    background: linear-gradient(145deg, #f59e0b, #d97706);
}

.quality-hard:hover {
    background: linear-gradient(145deg, #fbbf24, #f59e0b);
}

/* Good Button - Green */
.quality-good {
    background: linear-gradient(145deg, #10b981, #059669);
}

.quality-good:hover {
    background: linear-gradient(145deg, #34d399, #10b981);
}

/* Easy Button - Blue */
.quality-easy {
    background: linear-gradient(145deg, #3b82f6, #2563eb);
}

.quality-easy:hover {
    background: linear-gradient(145deg, #60a5fa, #3b82f6);
}

/* Legacy classes for backward compatibility */
.quality-1day {
    border-left: 4px solid #EF4444;
}

.quality-3days {
    border-left: 4px solid #F59E0B;
}

.quality-6days {
    border-left: 4px solid #10B981;
}

.quality-14days {
    border-left: 4px solid #3B82F6;
}

/* Mobile: 2x2 grid */
@media (max-width: 480px) {
    .srs-quality-options {
        grid-template-columns: repeat(2, 1fr);
    }

    .quality-option {
        min-height: 60px;
        padding: 10px 6px;
    }

    .quality-label {
        font-size: 12px;
    }
}

/* Pronunciation Practice Button */
.srs-practice-pronunciation-btn {
    margin-top: 12px;
    padding: 10px 20px;
    background: linear-gradient(135deg, #10B981, #059669);
    border: none;
    border-radius: 20px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.srs-practice-pronunciation-btn:hover {
    transform: scale(1.03);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.srs-practice-pronunciation-btn.recording {
    background: linear-gradient(135deg, #0891b2, #0e7490);
    animation: pulse-recording 1.5s infinite;
}

@keyframes pulse-recording {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}

.srs-pronunciation-result {
    margin-top: 8px;
    padding: 8px 12px;
    background: #F0FDF4;
    border-radius: 8px;
    font-size: 13px;
    text-align: center;
}

.srs-pronunciation-result.correct {
    background: #D1FAE5;
    color: #065F46;
}

.srs-pronunciation-result.incorrect {
    background: #FEE2E2;
    color: #991B1B;
}

/* Input Styling */
.srs-input-container {
    width: 100%;
    margin-top: 12px;
}

.srs-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #E5E7EB;
    border-radius: 12px;
    background: #F9FAFB;
    color: #111827;
    font-size: 16px;
    text-align: center;
    outline: none;
}

.srs-input:focus {
    border-color: #3B82F6;
    background: #FFFFFF;
}

/* Pagination */
.srs-progress {
    text-align: center;
    font-size: 14px;
    color: #9CA3AF;
    padding: 0;
    border: none;
    background: transparent;
}

.srs-progress-bar {
    display: none;
}

/* Hide bar, show text only? User said "Pagination: 14px normal centered" */
/* Actually keeping bar but making it subtle? User didn't design bar. Assuming text only or subtle. */
/* I'll hide the bar for now as per "Pagination: 14px, normal, centered" usually implies text "1 / 10" */


.srs-progress-bar {
    height: 8px;
    background: #cbd5e1;
    /* Clearer track */
    border-radius: 4px;
    overflow: hidden;
}

.srs-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #6366f1, #8b5cf6);
    border-radius: 3px;
    transition: width 0.3s ease;
    width: 0%;
}

/* Session Summary */
.srs-summary {
    display: none;
    padding: 32px 24px;
    text-align: center;
}

.srs-summary-content h3 {
    font-size: 1.5rem;
    color: #f1f5f9;
    margin-bottom: 24px;
}

.srs-summary-stats {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 24px;
}

.srs-summary-stats .stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.srs-summary-stats .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: #6366f1;
}

.srs-summary-stats .stat-label {
    font-size: 0.8rem;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.srs-points-earned {
    background: linear-gradient(145deg, rgba(34, 197, 94, 0.2), rgba(22, 163, 74, 0.1));
    border: 1px solid rgba(34, 197, 94, 0.3);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 16px;
}

.srs-points-earned span {
    color: #22c55e;
    font-size: 1.1rem;
    font-weight: 600;
}

.srs-points-earned .bonus {
    display: block;
    font-size: 0.85rem;
    color: #86efac;
    margin-top: 4px;
}

.srs-all-done {
    color: #22c55e;
    font-size: 1rem;
    margin-bottom: 20px;
}

.srs-remaining {
    color: #94a3b8;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.srs-done-btn {
    background: linear-gradient(145deg, #6366f1, #4f46e5);
    border: none;
    color: white;
    padding: 14px 48px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.srs-done-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

/* Start Review Button (in Vocab Book) */
.srs-start-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    background: linear-gradient(145deg, #8b5cf6, #7c3aed);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 16px;
}

.srs-start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
}

.srs-start-btn:disabled {
    background: #475569;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.srs-due-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* No Words Due State */
.srs-no-due {
    text-align: center;
    padding: 20px;
    color: #94a3b8;
}

.srs-next-review {
    font-size: 0.9rem;
    color: #64748b;
    margin-top: 8px;
}

/* Mobile Styles */
@media (max-width: 640px) {
    .srs-panel {
        width: 95%;
        max-height: 90vh;
        border-radius: 20px;
    }

    .srs-word {
        font-size: 1.75rem;
    }

    .srs-quality-btns {
        flex-wrap: wrap;
    }

    .srs-quality-btns button {
        min-width: 45%;
        padding: 12px 8px;
    }

    .srs-summary-stats {
        gap: 16px;
    }

    .srs-summary-stats .stat-value {
        font-size: 1.5rem;
    }
}

/* Input Styling */
.srs-input-container {
    width: 100%;
    margin-top: 24px;
    padding: 0 16px;
    box-sizing: border-box;
}

.srs-input {
    width: 100%;
    padding: 16px;
    background: #ffffff;
    border: 2px solid #cbd5e1;
    border-radius: 12px;
    color: #0f172a;
    font-size: 1.2rem;
    text-align: center;
    transition: all 0.2s;
    box-sizing: border-box !important;
    /* Force fix overflow */
    box-shadow: inner 0 2px 4px rgba(0, 0, 0, 0.05);
}

.srs-input:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

/* Record Button */
.srs-record-btn {
    background: linear-gradient(145deg, #ef4444, #dc2626);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 12px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.srs-record-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.srs-record-btn.recording {
    background: linear-gradient(145deg, #0891b2, #0e7490);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }

    100% {
        opacity: 1;
    }
}

/* Result Display */
.srs-result-container {
    margin-top: 8px;
    /* Reduced from 16px */
    text-align: center;
    padding: 8px 12px;
    /* More compact */
    background: #F0FDF4;
    /* Light green tint for correct, will be overridden by JS if needed */
    border-radius: 12px;
    width: 100%;
    box-sizing: border-box;
}

.srs-result-message {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
    color: #111827;
}

.srs-result-message.correct {
    color: #10B981;
    /* Match Good button */
}

.srs-result-message.incorrect {
    color: #EF4444;
    /* Match Again button */
}

.srs-user-input-display {
    font-size: 14px;
    color: #6B7280;
    font-style: italic;
}

.srs-definition-prompt {
    font-size: 16px;
    color: #374151 !important;
    /* Dark Gray - must be visible */
    text-align: center;
    line-height: 1.5;
}

/* Feedback Toast */
.srs-feedback-toast {
    position: absolute;
    bottom: 80px;
    /* Lower, above controls */
    left: 50%;
    transform: translateX(-50%) scale(0.9);
    background: rgba(31, 41, 55, 0.95);
    color: white;
    padding: 16px 32px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 2000;
    text-align: center;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.srs-feedback-toast.show {
    opacity: 1;
    transform: translateX(-50%) scale(1);
    margin-top: 0;
}

/* Writing Prompt Styled as Info Box */
.srs-writing-prompt {
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    color: #065f46;
    padding: 16px;
    border-radius: 12px;
    margin: 12px 0 16px 0;
    text-align: center;
    font-weight: 500;
    font-size: 1.1rem;
    line-height: 1.5;
}

/* Auto-Continue Button (Auto-Assign Mode) */
.srs-auto-continue-btn {
    width: 100%;
    max-width: 320px;
    padding: 16px 24px;
    margin: 12px auto;
    background: linear-gradient(145deg, #10B981, #059669);
    border: none;
    border-radius: 16px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.srs-auto-continue-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.3);
}

.srs-auto-continue-btn:active {
    transform: translateY(0);
}

.auto-continue-text {
    font-size: 1.1rem;
    font-weight: 700;
}

.auto-continue-hint {
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.85;
}

/* =========================================
   Dashboard SRS Summary
   ========================================= */
.dashboard-srs-summary {
    margin-top: 12px;
    padding: 10px 16px;
    background-color: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 12px;
    font-size: 0.95rem;
    color: #ffffff;
    display: none;
    /* Managed by JS */
    align-items: center;
    gap: 8px;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.dashboard-srs-summary.has-due {
    background-color: rgba(251, 191, 36, 0.25);
    border-color: rgba(251, 191, 36, 0.45);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    font-weight: 600;
}

.dashboard-srs-summary .icon {
    font-size: 1.1em;
}

.dashboard-cta-card:hover .dashboard-srs-summary {
    background-color: rgba(37, 99, 235, 0.2);
    border-color: rgba(37, 99, 235, 0.3);
}

/* =========================================
   Mobile UI Optimizations
   ========================================= */
@media (max-width: 640px) {

    /* Full Screen Modal */
    .srs-panel {
        width: 100% !important;
        height: 100% !important;
        max-width: none !important;
        max-height: none !important;
        top: 0 !important;
        left: 0 !important;
        transform: none !important;
        border-radius: 0 !important;
        padding: 16px !important;
        justify-content: space-between;
        /* Space out header, content, footer */
    }

    .srs-panel.active {
        transform: none !important;
    }

    /* Compact Header */
    .srs-header {
        margin-bottom: 12px;
        flex-shrink: 0;
    }

    .srs-header h2 {
        font-size: 1.2rem;
    }

    .srs-stats {
        margin-bottom: 16px;
    }

    /* Flexible Flashcard Container */
    .srs-flashcard-container {
        padding: 0;
        margin: 0;
        flex: 1;
        /* Take all available vertical space */
        justify-content: center;
        /* Center vertically */
        display: flex;
        flex-direction: column;
        width: 100%;
        max-height: 55vh;
        /* Don't be too tall */
    }

    .srs-flashcard {
        width: 100%;
        max-width: 100%;
        height: 100%;
        /* Fill container */
        min-height: 300px;
        /* Increased from 220px to fit content */
    }

    .srs-flashcard-front,
    .srs-flashcard-back {
        padding: 16px;
        justify-content: center;
        /* Center content vertically */
    }

    .srs-word,
    .srs-word-front {
        font-size: 2rem;
        /* Readable size */
        margin-bottom: 8px;
    }

    .srs-definition {
        font-size: 14px;
        -webkit-line-clamp: 5;
        line-clamp: 5;
        /* Show more text if needed */
    }

    /* Controls at Bottom - FIXED POSITION to prevent push */
    .srs-controls {
        width: 100%;
        padding: 12px 16px 24px 16px;
        flex-shrink: 0;
        background: transparent;
        gap: 12px;

        /* Absolute positioning at bottom */
        position: absolute;
        bottom: 0;
        left: 0;
        z-index: 20;
    }

    /* Add padding to panel bottom to reserve space for controls */
    .srs-panel {
        padding-bottom: 90px !important;
        /* Reserve space for buttons */
    }

    /* When quality buttons appear, they overlay or slide up without moving card */
    .srs-quality-btns {
        position: absolute;
        bottom: 0px;
        left: 0;
        right: 0;
        background: #FAFAFA;
        /* Opaque background to cover anything behind */
        padding: 16px;
        border-radius: 20px 20px 0 0;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
        z-index: 30;
    }

    /* Big Friendly Buttons */
    .srs-audio-btn {
        width: 100%;
        padding: 14px;
        justify-content: center;
        font-size: 1.1rem;
        border-radius: 12px;
    }

    .srs-record-btn {
        width: 100%;
        padding: 14px;
        border-radius: 12px;
    }

    /* Quality Grid - 2x2 for buttons */
    .srs-quality-options {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        width: 100%;
    }

    .quality-option {
        padding: 12px;
        height: auto;
        justify-content: center;
        text-align: center;
        align-items: center;
    }

    .quality-days {
        font-size: 1.1rem;
        margin-bottom: 2px;
    }

    .quality-desc {
        display: none;
        /* Hide description to keep it clean */
    }

    .srs-quality-prompt {
        font-size: 0.9rem;
        margin-bottom: 8px;
        opacity: 0.8;
    }

    /* Writing Mode Mobile */
    .srs-writing-modal {
        width: 100% !important;
        height: 100% !important;
        max-width: none !important;
        border-radius: 0 !important;
        top: 0 !important;
        left: 0 !important;
        transform: none !important;
        padding: 16px !important;
        z-index: 99999 !important;
    }

    .srs-writing-input {
        font-size: 1.2rem;
        /* Larger text for input */
        padding: 12px;
    }
}

/* FIX: Tutorial Layering (Must be above SRS Panel z-index 10001 AND Writing Modal z-index 99999) */
.vocab-tutorial-overlay {
    z-index: 100000 !important;
}

.vocab-tutorial-spotlight {
    z-index: 100001 !important;
}

.vocab-tutorial-tooltip {
    z-index: 100002 !important;
    pointer-events: auto !important;
}

/* Ensure tutorial buttons are clickable */
.vocab-tutorial-tooltip .tutorial-actions,
.vocab-tutorial-tooltip .tutorial-next,
.vocab-tutorial-tooltip .tutorial-skip {
    pointer-events: auto !important;
    cursor: pointer !important;
}

/* SRS Settings UI */
.srs-settings-btn {
    background: transparent;
    border: none;
    color: #9CA3AF;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 4px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.srs-settings-btn:hover {
    color: #111827;
    transform: rotate(30deg);
}

.srs-settings-modal {
    animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.srs-settings-content {
    animation: slideUp 0.3s ease;
}

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

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.settings-header {
    margin-bottom: 12px;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 8px;
}

.ai-score {
    font-weight: 700;
    color: #6366f1;
    font-size: 1.1rem;
}

.ai-summary {
    color: #64748b;
    font-style: italic;
}

.ai-correction-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ai-correction-list li {
    background: white;
    padding: 10px;
    margin-bottom: 8px;
    border-radius: 8px;
    border-left: 3px solid #f59e0b;
    /* Default warning color */
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.ai-correction-original {
    text-decoration: line-through;
    color: #94a3b8;
    margin-right: 8px;
}

.ai-correction-arrow {
    color: #64748b;
    margin-right: 8px;
}

.ai-correction-replacement {
    color: #10b981;
    font-weight: 600;
}

.ai-correction-reason {
    font-size: 0.85rem;
    color: #64748b;
    margin-top: 4px;
}

.ai-perfect-msg {
    color: #10b981;
    text-align: center;
    font-weight: 600;
    padding: 8px;
}

/* Feedback Types via classes */
.srs-writing-feedback.ai-result {
    background: white;
    border: 1px solid #e2e8f0;
    padding: 0;
    /* Let inner content handle padding */
}