/* ============================================
   Design Tokens
   ============================================ */
:root {
    /* Color — brand & semantic */
    --color-primary: #4caf50;
    --color-primary-dark: #2e7d32;
    --color-primary-light: #e8f5e9;
    --color-bg: #f5f5f5;
    --color-surface: #fff;
    --color-surface-alt: #f9f9f9;
    --color-surface-hover: #e8e8e8;
    --color-text: #333;
    --color-text-secondary: #555;
    --color-text-muted: #666;
    --color-text-faint: #999;
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    --color-border-lighter: #eee;
    --color-danger: #d32f2f;
    --color-danger-light: #ffcdd2;
    --color-danger-bg: #fff3f3;
    --color-accent: #ff9800;
    --color-accent-purple: #8b00ff;
    --color-accent-purple-light: #f5e6ff;
    --color-accent-blue: #2196f3;
    --color-accent-blue-light: #e3f2fd;
    --color-accent-blue-bg: #f0f9ff;
    --color-white: #fff;
    --color-text-dim: #888;
    --color-surface-dim: #f8f8f8;
    --color-border-active: #ccc;

    /* Radius scale */
    --radius-xs: 6px;
    --radius-sm: 8px;
    --radius-md: 0.75rem;   /* 12px */
    --radius-lg: 1rem;       /* 16px */
    --radius-xl: 1.25rem;    /* 20px */
    --radius-2xl: 1.5rem;    /* 24px — not used yet, reserved */
    --radius-pill: 1.25rem;  /* 20px pill */

    /* Shadows */
    --shadow-sm: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.05);
    --shadow-md: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 0.25rem 1.25rem rgba(0, 0, 0, 0.08);

    /* Spacing scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;

    /* Type scale */
    --text-2xs: 0.6rem;
    --text-xs: 0.65rem;
    --text-sm: 0.7rem;
    --text-sm-md: 0.75rem;
    --text-md: 0.8rem;
    --text-md-lg: 0.85rem;
    --text-base: 0.9rem;
    --text-lg: 1rem;
    --text-xl: 1.1rem;
    --text-2xl: 1.2rem;
    --text-3xl: 1.4rem;
    --text-4xl: 1.5rem;
    --text-5xl: 2rem;
    --text-6xl: 2.5rem;
    --text-7xl: 3.5rem;
    --text-8xl: 4rem;

    /* Motion */
    --transition-fast: 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh; /* legacy fallback */
    min-height: 100dvh; /* dynamic viewport — modern browsers */
    overflow-x: hidden;
}

.app {
    max-width: 30rem;
    margin: 0 auto;
    min-height: 100vh; /* legacy fallback */
    min-height: 100dvh; /* dynamic viewport — modern browsers */
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
}

/* ============================================
   Header
   ============================================ */
.header {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: var(--space-3);
}

.header-text {
    min-width: 0;
    flex: 1;
    overflow: hidden;
}

.header h1 {
    font-size: var(--text-3xl);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.subtitle {
    font-size: var(--text-md-lg);
    opacity: 0.9;
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ============================================
   Views
   ============================================ */
.view {
    display: none;
    padding: var(--space-6);
    overflow-y: auto;
    padding-bottom: 5rem;
}

.view.active {
    display: block;
}

/* ============================================
   Session Info
   ============================================ */
.session-info {
    text-align: center;
    margin-bottom: var(--space-6);
    color: var(--color-text-muted);
    font-size: var(--text-base);
}

/* ============================================
   Karte (Word Card)
   ============================================ */
.card {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem 1.25rem;
    text-align: center;
    margin-bottom: var(--space-6);
    box-shadow: var(--shadow-sm);
    position: relative;
}

.word-box-badge {
    position: absolute;
    right: 1.375rem;
    top: -0.8125rem;
    font-size: var(--text-sm-md);
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-pill);
    background: var(--color-border);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.word-display {
    font-size: var(--text-6xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-3);
    letter-spacing: 1px;
}

.word-hint {
    font-size: var(--text-md-lg);
    color: var(--color-text-faint);
}

/* ============================================
   Feedback Area
   ============================================ */
.feedback-area {
    margin-bottom: var(--space-6);
    text-align: center;
}

.feedback-text {
    font-size: var(--text-lg);
    font-weight: 500;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-md);
    background: var(--color-accent-blue-bg);
    color: var(--color-accent-blue);
    border: 2px solid var(--color-accent-blue-light);
    line-height: 1.4;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: block;
    width: 100%;
    padding: 1.125rem;
    font-size: var(--text-xl);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
    margin-bottom: var(--space-3);
    min-height: 3.5rem;
}

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

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

.btn-wrong {
    background: var(--color-accent-purple);
    color: var(--color-white);
}

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

.btn:hover {
    opacity: 0.9;
}

/* ============================================
   Form
   ============================================ */
.form-group {
    margin-bottom: var(--space-6);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 600;
    color: var(--color-text-secondary);
}

input[type="text"] {
    width: 100%;
    padding: var(--space-6);
    font-size: var(--text-2xl);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
}

input[type="text"]:focus {
    border-color: var(--color-accent-blue);
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
    text-align: center;
    padding: 2.5rem 1.25rem;
}

.empty-icon {
    font-size: var(--text-8xl);
    margin-bottom: var(--space-6);
}

.empty-state h2 {
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.empty-state p {
    color: var(--color-text-muted);
}

/* ============================================
   Reward GIF
   ============================================ */
.reward-gif {
    margin-top: 1.25rem;
    text-align: center;
}

.reward-gif img {
    max-width: 100%;
    max-height: 15.625rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Word List
   ============================================ */
.word-list {
    margin-top: 1.5rem;
}

.word-list h3 {
    margin-bottom: var(--space-3);
    color: var(--color-text-secondary);
}

.filter-input-wrapper {
    position: relative;
    margin-bottom: var(--space-6);
    flex: 1;
}

.filter-input-wrapper input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem var(--space-6);
    font-size: var(--text-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
}

.filter-input-wrapper input:focus {
    border-color: var(--color-accent-blue);
}

.filter-clear {
    position: absolute;
    right: var(--space-2);
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-border);
    border: none;
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    font-size: 1.2rem;
    line-height: 1;
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 0 2px 0;
}

.filter-clear:active {
    background: var(--color-border-active);
}

.word-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem;
    background: var(--color-surface-alt);
    border-radius: 0.625rem;
    margin-bottom: var(--space-2);
    gap: var(--space-2);
}

.word-item .word-text {
    font-size: var(--text-xl);
    font-weight: 500;
    flex: 1;
    min-width: 0;
}

.word-item .word-box {
    font-size: var(--text-sm-md);
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-pill);
    background: var(--color-border);
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.word-item .word-actions {
    display: flex;
    gap: 0.375rem;
    flex-shrink: 0;
}

/* ============================================
   Stats
   ============================================ */
.view--stats h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-top: 1.25rem;
    margin-bottom: 0.625rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--color-surface-alt);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    text-align: center;
}

.stat-number {
    font-size: var(--text-5xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--text-md);
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.boxes {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-2);
}

.box-item {
    background: var(--color-surface-alt);
    padding: 0.75rem 0.375rem;
    border-radius: 0.625rem;
    text-align: center;
    transition: transform 0.1s, background 0.2s;
}

.box-item.clickable {
    cursor: pointer;
}

.box-item.clickable:active {
    transform: scale(0.95);
    background: var(--color-surface-hover);
}

.box-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.box-count {
    font-size: var(--text-5xl);
    font-weight: 700;
    color: var(--color-accent-blue);
}

.box-hint {
    font-size: var(--text-2xs);
    color: var(--color-text-faint);
    margin-top: 2px;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-around;
    padding: var(--space-2) 0;
    z-index: 100;
    max-width: 30rem;
    margin: 0 auto;
}

.nav-btn {
    flex: 1;
    background: none;
    border: none;
    padding: var(--space-2);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
    cursor: pointer;
    line-height: 1.4;
}

.nav-btn.active {
    color: var(--color-primary);
    font-weight: 600;
}

/* ============================================
   Feedback Animations
   ============================================ */
@keyframes success-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.success-pulse {
    animation: success-pulse 0.3s ease;
}

@keyframes revive-pulse {
    0% { transform: scale(1); }
    25% { transform: scale(0.95); }
    50% { transform: scale(1.02); }
    75% { transform: scale(0.98); }
    100% { transform: scale(1); }
}

.revive-pulse {
    animation: revive-pulse 0.5s ease;
}

/* ============================================
   Modal
   ============================================ */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 200;
    display: none;
}

.modal.active {
    display: block;
}

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

.modal-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 80vh; /* legacy fallback */
    max-height: 80dvh; /* dynamic viewport — modern browsers */
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: var(--text-2xl);
    color: var(--color-text);
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--text-4xl);
    color: var(--color-text-faint);
    cursor: pointer;
    padding: 0 0.25rem;
}

.modal-body {
    padding: var(--space-2) var(--space-6);
    overflow-y: auto;
    flex: 1;
}

.modal-word-item {
    padding: 0.875rem;
    border-bottom: 1px solid var(--color-border-light);
    font-size: var(--text-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-2);
}

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

.word-info {
    flex: 1;
    min-width: 0;
}

.word-text {
    font-weight: 500;
}

.word-review-date {
    font-size: var(--text-sm-md);
    color: var(--color-text-faint);
}

.word-actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

.word-btn {
    padding: 0.375rem 0.625rem;
    font-size: var(--text-md-lg);
    border: none;
    border-radius: var(--radius-xs);
    cursor: pointer;
    background: var(--color-border-light);
    color: var(--color-text-muted);
}

.word-btn:active {
    background: var(--color-border);
}

.word-item .word-btn {
    padding: 0.25rem 0.5rem;
    font-size: var(--text-sm-md);
}

.word-btn-delete {
    color: var(--color-danger);
}

.word-btn-edit {
    color: var(--color-accent-blue);
}

.word-btn-journey {
    color: var(--color-accent);
}

.modal-empty {
    padding: 2.5rem;
    text-align: center;
    color: var(--color-text-faint);
}

.confirm-text {
    font-size: var(--text-xl);
    margin-bottom: 1.5rem;
    text-align: center;
}

.confirm-text span {
    font-weight: 600;
}

.confirm-actions {
    display: flex;
    gap: var(--space-3);
}

.confirm-actions .btn {
    flex: 1;
    margin-bottom: 0;
}

/* ============================================
   Wort-Reise Timeline
   ============================================ */
.journey-timeline {
    padding: var(--space-6) var(--space-2);
}

.journey-item {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    position: relative;
}

.journey-item:last-child {
    margin-bottom: 0;
}

.journey-line {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
}

.journey-dot {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    border: 3px solid;
}

.journey-up .journey-dot {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.journey-down .journey-dot {
    border-color: var(--color-accent-purple);
    background: var(--color-accent-purple-light);
}

.journey-connector {
    width: 3px;
    flex: 1;
    min-height: 1.875rem;
    background: var(--color-border);
    margin-top: 0.25rem;
    border-radius: 2px;
}

.journey-content {
    flex: 1;
    padding-top: 0.25rem;
}

.journey-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.journey-title {
    font-weight: 600;
    font-size: var(--text-lg);
}

.journey-up .journey-title {
    color: var(--color-primary);
}

.journey-down .journey-title {
    color: var(--color-accent);
}

.journey-date {
    font-size: var(--text-md);
    color: var(--color-text-faint);
}

.journey-boxes {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.journey-note {
    font-size: var(--text-md-lg);
    color: var(--color-text-dim);
    font-style: italic;
}

/* ============================================
   Docs Section
   ============================================ */
.docs-section {
    margin-top: 2rem;
    padding-bottom: 2.5rem;
}

.docs-section h3 {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-2);
    border-bottom: 2px solid var(--color-border);
}

.docs-card {
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.docs-card h4 {
    font-size: var(--text-lg);
    color: var(--color-text);
    margin-bottom: 0.625rem;
}

.docs-card p {
    font-size: var(--text-base);
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: var(--space-3);
}

.docs-table {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.docs-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    background: var(--color-white);
    border-radius: var(--radius-sm);
}

.docs-box {
    font-weight: 600;
    color: var(--color-accent-blue);
    font-size: var(--text-base);
}

.docs-info {
    font-size: var(--text-md-lg);
    color: var(--color-text-muted);
}

.docs-list {
    list-style: none;
    padding: 0;
    margin: var(--space-2) 0;
}

.docs-list li {
    padding: 0.375rem 0;
    font-size: var(--text-base);
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border-lighter);
}

.docs-list li:last-child {
    border-bottom: none;
}

.docs-note {
    font-size: var(--text-md-lg);
    color: var(--color-text-dim);
    font-style: italic;
    margin-top: var(--space-2);
    padding: var(--space-2);
    background: var(--color-white);
    border-radius: var(--radius-xs);
}

/* ============================================
   Responsive
   ============================================ */
@media (min-width: 481px) {
    .app {
        border-left: 1px solid var(--color-border);
        border-right: 1px solid var(--color-border);
    }
}

/* ============================================
   List Controls (Filter + Sort)
   ============================================ */
.list-controls {
    display: flex;
    gap: 0.625rem;
    align-items: stretch;
    margin-bottom: var(--space-6);
}

.list-controls .filter-input-wrapper {
    flex: 1;
    margin-bottom: 0;
}

.sort-toggle {
    background: var(--color-surface-dim);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.75rem 1.125rem;
    font-size: var(--text-lg);
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.sort-toggle:active {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

/* ============================================
   Chart Container
   ============================================ */
.chart-container {
    position: relative;
    height: 15.625rem;
    margin-bottom: 1.5rem;
    padding: var(--space-3);
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
}

/* ============================================
   Login View
   ============================================ */
.view--login {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh; /* legacy fallback */
    min-height: 100dvh; /* dynamic viewport — modern browsers */
    padding: 1.5rem;
    padding-bottom: 1.5rem;
}

.view--login.active {
    display: flex;
}

.login-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: 2.5rem 1.75rem;
    width: 100%;
    max-width: 22.5rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.login-icon {
    font-size: var(--text-7xl);
    margin-bottom: var(--space-3);
}

.login-card h2 {
    font-size: var(--text-4xl);
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.login-subtitle {
    font-size: var(--text-base);
    color: var(--color-text-faint);
    margin-bottom: var(--space-6);
}

/* Mode-Toggle auf Login-Screen */
.mode-toggle {
    display: flex;
    gap: 0;
    margin-bottom: 1.25rem;
    background: var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 0.25rem;
}

.mode-btn {
    flex: 1;
    padding: 0.625rem var(--space-6);
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    font-size: var(--text-md-lg);
    font-weight: 600;
    color: var(--color-text-dim);
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 0.125rem 0.5rem rgba(76, 175, 80, 0.3);
}

.mode-btn:not(.active):hover {
    background: var(--color-border);
}

.login-card .form-group {
    margin-bottom: var(--space-3);
}

.login-card .btn {
    margin-top: var(--space-2);
}

.login-error {
    margin-top: var(--space-6);
    padding: var(--space-3) var(--space-6);
    background: var(--color-danger-bg);
    border: 2px solid var(--color-danger-light);
    border-radius: var(--radius-md);
    color: var(--color-danger);
    font-size: var(--text-base);
    font-weight: 500;
}

/* Login-Inputs speziell: auch password */
.login-card input[type="text"],
.login-card input[type="password"] {
    width: 100%;
    padding: var(--space-6);
    font-size: var(--text-2xl);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
}

.login-card input:focus {
    border-color: var(--color-primary);
}

/* ============================================
   Header mit User Info
   ============================================ */
.header-user {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
    white-space: nowrap;
}

.header-username {
    font-size: var(--text-md);
    opacity: 0.9;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-pill);
}

.logout-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--color-white);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    font-size: var(--text-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.logout-btn:active {
    background: rgba(255, 255, 255, 0.35);
}

/* ============================================
   Translation-Mode Styles
   Orientiert an bestehenden UI-Elementen
   ============================================ */
.word-translation {
    font-size: var(--text-5xl);
    font-weight: 600;
    color: var(--color-text);
    margin-top: var(--space-3);
    margin-bottom: var(--space-2);
    letter-spacing: 1px;
    min-height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.word-translation.hidden {
    color: var(--color-border-active);
    font-size: var(--text-4xl);
}

.word-translation.revealed {
    color: var(--color-primary);
    animation: revealFade 0.3s ease;
}

@keyframes revealFade {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.btn-reveal {
    background: var(--color-accent-blue);
    color: var(--color-white);
    margin: var(--space-2) auto 0;
    display: block;
    width: auto;
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-md);
    border: none;
    font-size: var(--text-lg);
    font-weight: 500;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.btn-reveal:hover {
    opacity: 0.9;
}

/* ============================================
   Accessibility
   ============================================ */

/* Keyboard-only focus ring (not on mouse/touch click) */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}