/* =====================================================
   VERB MASTER - Modern Learning Game UI
   Target: 12-13 year old student (5ème)
   Aesthetic: Playful-Modern, Warm & Energetic
   ===================================================== */

/* CSS Variables */
:root {
    /* Main palette - warm coral to teal */
    --primary: #FF6B6B;
    --primary-dark: #ee5a5a;
    --secondary: #4ECDC4;
    --secondary-dark: #3dbdb5;
    --accent: #FFE66D;
    --accent-dark: #ffd93d;

    /* Backgrounds */
    --bg-main: #1a1a2e;
    --bg-card: rgba(255, 255, 255, 0.08);
    --bg-card-hover: rgba(255, 255, 255, 0.12);
    --bg-input: rgba(255, 255, 255, 0.1);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* Feedback colors */
    --success: #4ECDC4;
    --success-bg: rgba(78, 205, 196, 0.2);
    --error: #FF6B6B;
    --error-bg: rgba(255, 107, 107, 0.2);
    --warning: #FFE66D;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 50px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(255, 107, 107, 0.3);

    /* Typography */
    --font-display: 'Fredoka', sans-serif;
    --font-body: 'Nunito', sans-serif;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-body);
    background: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    line-height: 1.5;
}

/* App container */
.app {
    min-height: 100vh;
    min-height: 100dvh;
    position: relative;
    overflow: hidden;
}

/* Animated background blobs */
.bg-decoration {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: blobFloat 20s ease-in-out infinite;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary);
    bottom: -50px;
    left: -50px;
    animation-delay: -7s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.1); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 40px) scale(1.05); }
}

/* Container */
.container {
    position: relative;
    z-index: 1;
    max-width: 600px;
    margin: 0 auto;
    padding: var(--space-md);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 0;
    margin-bottom: var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

.logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-stats {
    display: flex;
    gap: var(--space-sm);
}

.stat-pill {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-card);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-icon {
    font-size: 0.875rem;
}

.score-pill {
    color: var(--accent);
}

.timer-pill {
    color: var(--primary);
    display: none;
}

.timer-pill.visible {
    display: flex;
}

.timer-pill.warning {
    animation: timerPulse 0.5s ease infinite;
    background: var(--error-bg);
}

.streak-pill {
    color: var(--secondary);
    display: none;
}

.streak-pill.visible {
    display: flex;
}

@keyframes timerPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Main content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Screens */
.screen {
    display: none;
    animation: screenFadeIn 0.3s ease;
}

.screen.active {
    display: flex;
    flex-direction: column;
    flex: 1;
}

@keyframes screenFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =====================================================
   MENU SCREEN
   ===================================================== */

.menu-hero {
    text-align: center;
    margin-bottom: var(--space-xl);
    padding-top: var(--space-lg);
}

.hero-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--space-sm);
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.card-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

/* Toggle group (list selector) */
.toggle-group {
    display: flex;
    gap: var(--space-sm);
}

.toggle-option {
    flex: 1;
    cursor: pointer;
}

.toggle-option input {
    display: none;
}

.toggle-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-input);
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    transition: var(--transition-normal);
}

.toggle-option input:checked + .toggle-btn {
    background: var(--success-bg);
    border-color: var(--secondary);
}

.toggle-label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.toggle-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Game modes grid */
.modes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.mode-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg) var(--space-md);
    background: var(--bg-input);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    color: var(--text-primary);
    position: relative;
    overflow: hidden;
}

.mode-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: var(--transition-normal);
}

.mode-btn:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.2);
}

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

.mode-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    display: block;
}

.mode-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 4px;
}

.mode-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.3;
}

/* Mode-specific colors */
.mode-classique:hover { background: rgba(78, 205, 196, 0.15); border-color: var(--secondary); }
.mode-sprint:hover { background: rgba(255, 107, 107, 0.15); border-color: var(--primary); }
.mode-sansfaute:hover { background: rgba(255, 230, 109, 0.15); border-color: var(--accent); }
.mode-zen:hover { background: rgba(156, 136, 255, 0.15); border-color: #9C88FF; }

/* Quick actions */
.quick-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: var(--font-body);
}

.action-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Progress banner */
.progress-banner {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    margin-top: auto;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
}

.progress-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.progress-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--secondary);
}

.progress-bar-container {
    height: 8px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.5s ease;
}

/* =====================================================
   GAME SCREEN
   ===================================================== */

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.back-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.back-btn:hover {
    background: var(--bg-card-hover);
}

.game-mode-badge {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
}

.game-progress {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.875rem;
}

/* Feedback area */
.feedback-area {
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-sm);
}

.feedback-message {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: var(--transition-normal);
}

.feedback-message.show {
    opacity: 1;
    transform: translateY(0);
}

.feedback-message.correct {
    background: var(--success-bg);
    color: var(--success);
}

.feedback-message.wrong {
    background: var(--error-bg);
    color: var(--error);
}

/* Verb card */
.verb-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 255, 255, 0.05) 100%);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.verb-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.verb-card-inner {
    position: relative;
    z-index: 1;
}

.verb-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.verb-word {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    transition: var(--transition-normal);
}

.verb-card.animate .verb-word {
    animation: verbBounce 0.4s ease;
}

@keyframes verbBounce {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* Input form */
.input-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.input-row {
    display: flex;
    gap: var(--space-md);
}

.input-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.input-field-full {
    flex: none;
}

.input-field label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-field input {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-input);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-body);
    transition: var(--transition-fast);
    -webkit-appearance: none;
}

.input-field input:focus {
    outline: none;
    border-color: var(--secondary);
    background: rgba(78, 205, 196, 0.1);
}

.input-field input::placeholder {
    color: var(--text-muted);
}

.input-field input.correct {
    border-color: var(--success);
    background: var(--success-bg);
}

.input-field input.wrong {
    border-color: var(--error);
    background: var(--error-bg);
}

/* Submit button */
.submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
}

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

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.submit-icon {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

.submit-btn:hover .submit-icon {
    transform: translateX(4px);
}

/* History section */
.history-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 150px;
    max-height: 250px;
}

.history-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.answers-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.answer-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-input);
    border-radius: var(--radius-md);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

.answer-item.correct {
    border-left: 3px solid var(--success);
}

.answer-item.incorrect {
    border-left: 3px solid var(--error);
}

.answer-item .verb {
    font-weight: 700;
    min-width: 60px;
}

.answer-item .responses {
    flex: 1;
    display: flex;
    gap: var(--space-sm);
    font-size: 0.85rem;
    flex-wrap: wrap;
}

.answer-item .response {
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
}

.answer-item .response.correct {
    color: var(--success);
}

.answer-item .response.incorrect {
    color: var(--error);
    text-decoration: line-through;
}

.answer-item .correct-answer {
    color: var(--success);
    font-weight: 600;
    margin-left: 4px;
}

/* =====================================================
   GAME OVER SCREEN
   ===================================================== */

.game-over-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-xl);
}

.result-emoji {
    font-size: 4rem;
    margin-bottom: var(--space-md);
    animation: resultBounce 0.6s ease;
}

@keyframes resultBounce {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.result-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.result-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.result-stats {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.result-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.result-stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary);
}

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

.save-score-section {
    display: flex;
    gap: var(--space-sm);
    width: 100%;
    max-width: 300px;
    margin-bottom: var(--space-lg);
}

.save-score-section input {
    flex: 1;
    padding: var(--space-md);
    background: var(--bg-input);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font-body);
}

.save-score-section input:focus {
    outline: none;
    border-color: var(--secondary);
}

/* Buttons */
.primary-btn {
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-dark) 100%);
    border: none;
    border-radius: var(--radius-md);
    color: var(--bg-main);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(78, 205, 196, 0.4);
}

.secondary-btn {
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-card);
    border: 2px solid var(--secondary);
    border-radius: var(--radius-md);
    color: var(--secondary);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.secondary-btn:hover {
    background: var(--success-bg);
}

.ghost-btn {
    padding: var(--space-md) var(--space-lg);
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.ghost-btn:hover {
    color: var(--text-primary);
}

.game-over-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
}

/* =====================================================
   LEADERBOARD SCREEN
   ===================================================== */

.screen-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.screen-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.score-item {
    display: flex;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
}

.score-item:nth-child(1) { border-left: 3px solid gold; }
.score-item:nth-child(2) { border-left: 3px solid silver; }
.score-item:nth-child(3) { border-left: 3px solid #cd7f32; }

.score-rank {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    min-width: 40px;
    color: var(--text-muted);
}

.score-name {
    flex: 1;
    font-weight: 600;
}

.score-value {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--secondary);
}

/* =====================================================
   STATS SCREEN
   ===================================================== */

.stats-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-height: calc(100vh - 150px);
    overflow-y: auto;
}

.verb-stat-item {
    display: flex;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    gap: var(--space-md);
}

.verb-stat-info {
    flex: 1;
}

.verb-stat-word {
    font-weight: 700;
    margin-bottom: 2px;
}

.verb-stat-forms {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.verb-stat-progress {
    width: 100px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
}

.verb-stat-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.verb-stat-fill {
    height: 100%;
    background: var(--secondary);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
}

.verb-stat-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* =====================================================
   VERB LISTS SCREEN
   ===================================================== */

.verb-lists-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    max-height: calc(100vh - 150px);
    overflow-y: auto;
}

.verb-list-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
}

.verb-list-section h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

.verb-list {
    display: grid;
    gap: var(--space-sm);
}

.verb-list-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

.verb-list-item .verb-infinitif {
    font-weight: 700;
}

.verb-list-item .verb-forms {
    color: var(--text-muted);
    text-align: right;
}

/* =====================================================
   FEEDBACK POPUP (quick toast)
   ===================================================== */

.feedback-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-xl);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    opacity: 0;
    pointer-events: none;
    z-index: 1000;
    transition: var(--transition-normal);
}

.feedback-popup.show {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

.feedback-popup.correct {
    background: var(--success);
    color: var(--bg-main);
    box-shadow: 0 10px 40px rgba(78, 205, 196, 0.5);
}

.feedback-popup.wrong {
    background: var(--error);
    color: white;
    box-shadow: 0 10px 40px rgba(255, 107, 107, 0.5);
}

/* =====================================================
   CONFETTI
   ===================================================== */

.confetti-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 999;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    animation: confettiFall 3s ease-out forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(-100%) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

/* =====================================================
   SCROLLBAR
   ===================================================== */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* =====================================================
   RESPONSIVE - TABLET
   ===================================================== */

@media (min-width: 768px) {
    .container {
        padding: var(--space-lg);
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .verb-word {
        font-size: 4rem;
    }

    .modes-grid {
        gap: var(--space-md);
    }

    .mode-btn {
        padding: var(--space-xl);
    }
}

/* =====================================================
   RESPONSIVE - MOBILE
   ===================================================== */

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .container {
        padding: var(--space-sm);
    }

    .header {
        flex-wrap: wrap;
        gap: var(--space-sm);
    }

    .header-stats {
        width: 100%;
        justify-content: center;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .verb-word {
        font-size: 2.5rem;
    }

    .input-row {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .result-stats {
        flex-direction: column;
        gap: var(--space-md);
    }

    .game-over-actions {
        flex-direction: column;
        width: 100%;
    }

    .game-over-actions button {
        width: 100%;
    }

    .save-score-section {
        flex-direction: column;
    }

    .answer-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .answer-item .responses {
        width: 100%;
    }
}

/* =====================================================
   SAFE AREA (iPhone notch)
   ===================================================== */

@supports (padding-top: env(safe-area-inset-top)) {
    .app {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
}

/* =====================================================
   REDUCED MOTION
   ===================================================== */

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

    .blob {
        display: none;
    }
}