/* ============================================================================
   ASVAB Vocabulary Study - Flashcard Styles
   ============================================================================ */

/* Page Layout */
.vocabulary-page {
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    min-height: 100vh;
}

.vocabulary-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================================================
   Header
   ============================================================================ */

.vocab-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.back-link {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

.back-link:hover {
    color: var(--color-secondary);
    text-decoration: none;
}

.vocab-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-secondary);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.vocab-logo:hover {
    opacity: 0.7;
    text-decoration: none;
}

.vocab-badge {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-left: var(--spacing-md);
}

.header-center {
    flex: 1;
    max-width: 400px;
    margin: 0 var(--spacing-xl);
}

.progress-container {
    width: 100%;
}

.progress-text {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.progress-bar {
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-secondary) 0%, var(--color-highlight) 100%);
    border-radius: 3px;
    transition: width 0.3s ease;
}

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

.mastered-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(34, 197, 94, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.mastered-icon {
    color: var(--color-success);
    font-weight: bold;
}

.mastered-count {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-success);
}

.mastered-label {
    font-size: 0.75rem;
    color: var(--color-success);
}

/* ============================================================================
   Smart Study Panel - Beautiful Category & Focus Mode Selector
   ============================================================================ */

.smart-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(6, 182, 212, 0.05) 100%);
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.panel-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.panel-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.panel-buttons {
    display: flex;
    gap: 4px;
    background: var(--color-bg-elevated);
    padding: 4px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.pill-btn {
    padding: 6px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.pill-btn:hover {
    color: var(--color-secondary);
    background: rgba(37, 99, 235, 0.08);
}

.pill-btn.active {
    color: white;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.panel-divider {
    width: 1px;
    height: 32px;
    background: var(--color-border);
}

.panel-actions {
    margin-left: auto;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 16px;
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.test-btn {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(6, 182, 212, 0.3);
}

.test-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(6, 182, 212, 0.4);
    text-decoration: none;
}

.action-icon {
    font-size: 1rem;
}

/* ============================================================================
   Resume Banner - Shows when user has saved progress
   ============================================================================ */

.resume-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.08) 0%, rgba(22, 163, 74, 0.12) 100%);
    border-bottom: 1px solid rgba(34, 197, 94, 0.2);
}

.resume-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text);
    font-size: 0.9rem;
}

.resume-icon {
    font-size: 1.25rem;
}

.resume-message strong {
    color: var(--color-success);
    font-family: var(--font-mono);
}

.resume-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.resume-btn-primary {
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--color-success) 0%, #16a34a 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.3);
}

.resume-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(34, 197, 94, 0.4);
}

.resume-btn-secondary {
    padding: 8px 16px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.resume-btn-secondary:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

/* ============================================================================
   Main Card Area
   ============================================================================ */

.vocab-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.flashcard-container {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

/* ============================================================================
   Flashcard
   ============================================================================ */

.flashcard {
    width: 100%;
    height: 400px;
    perspective: 1000px;
    cursor: pointer;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

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

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.card-front {
    background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%);
    color: white;
}

.card-back {
    background: var(--color-bg-elevated);
    transform: rotateY(180deg);
    border: 1px solid var(--color-border);
}

/* Card Front Styles */
.card-category {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.card-word {
    font-size: 3.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.speak-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.speak-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.card-back .speak-btn {
    background: var(--color-secondary);
    border: none;
    color: white;
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-lg);
}

.card-back .speak-btn:hover {
    background: var(--color-accent);
}

.card-hint {
    position: absolute;
    bottom: var(--spacing-lg);
    font-size: 0.75rem;
    opacity: 0.6;
    color: inherit;
}

.card-back .card-hint {
    color: var(--color-text-muted);
}

/* Card Image Container */
.card-image-container {
    width: 100%;
    max-height: 120px;
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: center;
    align-items: center;
}

.card-image {
    max-width: 100%;
    max-height: 120px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    object-fit: contain;
}

/* Card Back Styles */
.card-meaning-section,
.card-example-section {
    width: 100%;
    text-align: center;
}

.card-meaning-section {
    margin-bottom: var(--spacing-xl);
}

.card-meaning-label,
.card-example-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.card-meaning {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.card-example {
    font-size: 1.125rem;
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    font-style: italic;
}


/* ============================================================================
   Speech Controls Panel - Modern Design
   ============================================================================ */

.speech-controls-panel {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 16px 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.control-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.control-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.control-icon {
    font-size: 1.2rem;
    opacity: 0.9;
}

.control-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: #374151;
}

.control-divider {
    width: 1px;
    height: 28px;
    background: #e5e7eb;
}

/* Modern Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

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

.toggle-track {
    display: inline-block;
    width: 48px;
    height: 26px;
    background: #d1d5db;
    border-radius: 13px;
    position: relative;
    transition: background 0.3s ease;
}

.toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.toggle-switch input:checked + .toggle-track {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
}

.toggle-switch input:checked + .toggle-track .toggle-thumb {
    transform: translateX(22px);
}

/* Modern Select Dropdown */
.control-select {
    appearance: none;
    -webkit-appearance: none;
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    padding: 10px 36px 10px 14px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #1f2937;
    cursor: pointer;
    transition: all 0.2s ease;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M3 4.5L6 7.5L9 4.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    min-width: 140px;
}

.control-select:hover {
    border-color: #6366f1;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.15);
}

.control-select:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

#voice-select {
    min-width: 160px;
}

/* Responsive */
@media (max-width: 768px) {
    .speech-controls-panel {
        padding: 14px 18px;
    }
    
    .control-row {
        flex-wrap: wrap;
        gap: 16px;
    }
    
    .control-divider {
        display: none;
    }
}

@media (max-width: 480px) {
    .control-select {
        min-width: 120px;
        padding: 8px 30px 8px 12px;
        font-size: 0.85rem;
    }
    
    .control-label {
        font-size: 0.85rem;
    }
}

/* ============================================================================
   Mastery Buttons
   ============================================================================ */

.mastery-actions {
    display: flex;
    gap: var(--spacing-md);
    width: 100%;
}

.mastery-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-elevated);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 1rem;
    font-weight: 600;
}

.mastery-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.mastery-btn.not-mastered:hover {
    border-color: var(--color-warning);
    background: rgba(245, 158, 11, 0.1);
}

.mastery-btn.not-mastered .mastery-icon {
    color: var(--color-warning);
}

.mastery-btn.mastered:hover {
    border-color: var(--color-success);
    background: rgba(34, 197, 94, 0.1);
}

.mastery-btn.mastered .mastery-icon {
    color: var(--color-success);
}

.mastery-icon {
    font-size: 1.5rem;
}

.mastery-text {
    color: var(--color-text);
}

/* ============================================================================
   Footer Navigation
   ============================================================================ */

.vocab-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg-elevated);
    border-top: 1px solid var(--color-border);
}

.nav-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition-fast);
}

.nav-btn:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

.nav-btn.primary {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
    border: none;
    color: white;
}

.nav-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.keyboard-hints {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.keyboard-hints kbd {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    margin: 0 var(--spacing-xs);
}

/* ============================================================================
   Star Button
   ============================================================================ */

.star-btn {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
}

.star-btn:hover {
    background: rgba(255, 193, 7, 0.3);
    border-color: #ffc107;
    transform: scale(1.1);
}

.star-btn.starred {
    background: rgba(255, 193, 7, 0.4);
    border-color: #ffc107;
}

.star-btn.starred .star-icon {
    color: #ffc107;
}

.star-btn .star-icon {
    color: white;
    transition: all 0.3s ease;
}

.star-btn.starred .star-icon::before {
    content: '★';
}

.star-btn:not(.starred) .star-icon::before {
    content: '☆';
}

/* Starred display in header */
.starred-display {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 193, 7, 0.1);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 193, 7, 0.2);
    margin-right: var(--spacing-sm);
}

.starred-icon {
    font-size: 1rem;
}

.starred-count {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
    color: #d97706;
}

/* ============================================================================
   Shuffle Toggle Styling
   ============================================================================ */

.toggle-switch input:checked + .shuffle-track {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

/* ============================================================================
   Toast Notification
   ============================================================================ */

.toast-notification {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(30, 41, 59, 0.95);
    color: white;
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast-notification.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* ============================================================================
   Floating Stats Button - Moved to LEFT side
   ============================================================================ */

.floating-stats-btn {
    position: fixed;
    bottom: calc(80px + var(--spacing-xl));  /* Above footer */
    right: var(--spacing-xl);  /* Right side to avoid overlap with Previous */
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-accent) 100%);
    border: none;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    font-size: 1.5rem;
    transition: var(--transition-fast);
    z-index: 50;
}

.floating-stats-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

/* ============================================================================
   Stats Modal
   ============================================================================ */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.modal-content h3 {
    margin-bottom: var(--spacing-xl);
    color: var(--color-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stats-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.stat-item {
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.stat-item.stat-success {
    background: rgba(34, 197, 94, 0.08);
    border-color: rgba(34, 197, 94, 0.2);
}

.stat-item.stat-success .stat-value {
    color: #16a34a;
}

.stat-item.stat-starred {
    background: rgba(255, 193, 7, 0.08);
    border-color: rgba(255, 193, 7, 0.2);
}

.stat-item.stat-starred .stat-value {
    color: #d97706;
}

.stat-item.stat-warning {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.2);
}

.stat-item.stat-warning .stat-value {
    color: #dc2626;
}

.stat-item.stat-due {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.2);
}

.stat-item.stat-due .stat-value {
    color: #4f46e5;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Large progress bar in modal */
.progress-bar-large {
    position: relative;
    height: 32px;
    background: var(--color-border);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.progress-fill-large {
    height: 100%;
    background: linear-gradient(90deg, var(--color-success) 0%, #16a34a 100%);
    border-radius: 16px;
    transition: width 0.5s ease;
}

.progress-text-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--color-text);
}

.srs-info {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.btn-danger {
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* ============================================================================
   Speaking Animation
   ============================================================================ */

.speak-btn.speaking {
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 768px) {
    .vocab-header {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .header-center {
        order: 3;
        flex: none;
        width: 100%;
        max-width: none;
        margin: 0;
    }
    
    .smart-panel {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }
    
    .panel-divider {
        width: 100%;
        height: 1px;
    }
    
    .panel-section {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .panel-actions {
        margin-left: 0;
    }
    
    .resume-banner {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .flashcard {
        height: 350px;
    }
    
    .card-word {
        font-size: 2.5rem;
    }
    
    .card-meaning {
        font-size: 2rem;
    }
    
    .card-example {
        font-size: 1rem;
    }
    
    .speech-controls-panel .control-row {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .mastery-actions {
        flex-direction: column;
    }
    
    .keyboard-hints {
        display: none;
    }
    
    .vocab-footer {
        justify-content: space-between;
    }
    
    .footer-center {
        display: none;
    }
}

@media (max-width: 480px) {
    .flashcard {
        height: 300px;
    }
    
    .card-front,
    .card-back {
        padding: var(--spacing-lg);
    }
    
    .card-word {
        font-size: 2rem;
    }
    
    .card-meaning {
        font-size: 1.5rem;
    }
    
    .nav-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
    
    .pill-btn {
        padding: 4px 8px;
        font-size: 0.75rem;
    }
}