/* ================================================
   Hindi Typing Tutorial - Main Styles
   Modern, Playful, Gamified Learning Experience
   ================================================ */

/* Google Font - Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');

/* Kruti Dev 010 Hindi Font
   Path is relative to this CSS file (/tutorial/css/),
   so ../../fonts/ reaches /hindi/fonts/ */
@font-face {
    font-family: 'KrutiDev010';
    src: url('../../fonts/Kruti_Dev_010.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

/* ================================================
   CSS VARIABLES
   Core theme vars come from the site main.css.
   Tutorial extras are defined here.
   ================================================ */
:root {
    /* Per-font accent colour (overridden by JS from FONT_CONFIG.themeColor) */
    --font-accent:      var(--theme-accent, #FF6B35);

    /* Gamification accent palette */
    --accent-primary:   var(--font-accent);
    --accent-secondary: #4ECDC4;
    --accent-tertiary:  #6C63FF;
    --accent-gold:      #FFD93D;
    --accent-green:     #25A55F;
    --accent-orange:    #FF6B35;
    --accent-correct:   #48c78e;
    --accent-wrong:     #ff6b6b;

    /* Gradients */
    --gradient-hero:   linear-gradient(135deg, var(--theme-card) 0%, var(--theme-surface) 100%);
    --gradient-card:   linear-gradient(180deg, var(--theme-card) 0%, var(--theme-surface) 100%);
    --gradient-button: linear-gradient(135deg, var(--theme-accent) 0%, var(--theme-accent-dk) 100%);
    --gradient-xp:     linear-gradient(90deg, #FFD93D 0%, #FF6B35 100%);
    --gradient-glow:   radial-gradient(circle, var(--theme-glow) 0%, transparent 70%);

    /* Gamification tokens */
    --xp-glow:    var(--theme-glow);
    --streak-fire: #FF6B35;
    --level-badge: var(--theme-accent-dk, #6C63FF);

    /* Spacing */
    --spacing-xs:  4px;
    --spacing-sm:  8px;
    --spacing-md:  16px;
    --spacing-lg:  24px;
    --spacing-xl:  32px;
    --spacing-xxl: 48px;

    /* Border radius */
    --radius-sm:   8px;
    --radius-md:   12px;
    --radius-lg:   20px;
    --radius-xl:   28px;
    --radius-full: 50%;

    /* Shadows */
    --shadow-sm:   0 2px 8px  var(--boxshadow-color);
    --shadow-md:   0 4px 16px var(--boxshadow-color);
    --shadow-lg:   0 8px 32px var(--boxshadow-color);
    --shadow-glow: 0 0 20px   var(--xp-glow);

    /* Transitions */
    --transition-fast:   0.15s ease;
    --transition-normal: 0.3s  ease;
    --transition-slow:   0.5s  ease;

    /* Hindi font */
    --font-hindi: 'KrutiDev010', serif;
}

/* ================================================
   BASE STYLES
   ================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--theme-bg, var(--background-color));
    color: var(--text-color);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover { color: var(--accent-primary); }

/* Hindi text class */
.hindi-text {
    font-family: var(--font-hindi), 'KrutiDev010', serif;
}

/* Quick start cards */
.quick-start-card {
    cursor: pointer;
    transition: all var(--transition-normal);
}

.quick-start-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-secondary) !important;
    box-shadow: var(--shadow-lg);
}

/* Section cards */
.section-card {
    cursor: pointer;
    transition: all var(--transition-normal);
}

.section-card:hover { transform: translateY(-3px); }

/* ================================================
   TUTORIAL LAYOUT
   ================================================ */
.tutorial-container {
    max-width: 1170px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.tutorial-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-lg);
    min-height: calc(100vh - 200px);
}

/* ================================================
   SIDEBAR
   ================================================ */
.tutorial-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Font Switcher Nav */
.font-switcher {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.font-switch-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 50px;
    border: 2px solid var(--fscolor, rgba(255,255,255,0.15));
    background: rgba(255,255,255,0.04);
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: background 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
}

.font-switch-btn:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--fscolor, rgba(255,255,255,0.5));
    box-shadow: 0 0 14px var(--fscolor, rgba(255,255,255,0.3));
    transform: translateY(-2px);
    color: var(--text-color);
    text-decoration: none;
}

.hub-btn { --fscolor: rgba(255,255,255,0.35); }
.font-switch-icon { font-size: 1rem; line-height: 1; }

/* Profile & XP Section */
.profile-section {
    background: var(--theme-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.profile-avatar {
    width: 60px; height: 60px;
    border-radius: var(--radius-full);
    background: var(--gradient-button);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; font-weight: 800;
    color: var(--theme-invert);
}

.profile-info h3 { margin-bottom: 0; font-size: 1.1rem; }

.level-badge {
    display: inline-block;
    background: var(--level-badge);
    color: var(--theme-invert);
    padding: 2px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem; font-weight: 600;
}

.level-title { color: var(--accent-gold); font-size: 0.85rem; }

/* XP Progress Bar */
.xp-section { margin-top: var(--spacing-md); }

.xp-label {
    display: flex; justify-content: space-between;
    font-size: 0.85rem; margin-bottom: var(--spacing-xs);
}

.xp-current { color: var(--accent-gold); font-weight: 600; }
.xp-next { color: var(--text-color); opacity: 0.7; }

.xp-bar {
    height: 12px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden; position: relative;
}

.xp-fill {
    height: 100%;
    background: var(--gradient-xp);
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
    position: relative;
}

.xp-fill::after {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: xpShimmer 2s infinite;
}

@keyframes xpShimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.stat-item {
    background: var(--theme-surface); border: 1px solid var(--border-color);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm); text-align: center;
}

.stat-value { font-size: 1.25rem; font-weight: 700; color: var(--accent-primary); }
.stat-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.5px; opacity: 0.7; }
.streak-item .stat-value { color: var(--streak-fire); }

/* Lesson Selector */
.lesson-selector {
    background: var(--theme-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    flex: 1; overflow-y: auto; max-height: 500px;
}

.lesson-selector h4 {
    margin-bottom: var(--spacing-md);
    display: flex; align-items: center; gap: var(--spacing-sm);
}

.section-group { margin-bottom: var(--spacing-lg); }

.section-header {
    display: flex; align-items: center; gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--theme-surface); border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    cursor: pointer; transition: background var(--transition-fast);
}

.section-header:hover { background: var(--theme-card); }

.section-icon {
    width: 32px; height: 32px;
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem;
}

.section-icon.section-1 { background: var(--accent-primary); }
.section-icon.section-2 { background: var(--accent-secondary); }
.section-icon.section-3 { background: var(--accent-tertiary); }
.section-icon.section-4 { background: var(--accent-green); }
.section-icon.section-5 { background: var(--accent-gold); color: #333; }
.section-icon.section-6 { background: var(--accent-orange); }

.section-title { flex: 1; font-size: 0.9rem; font-weight: 600; }
.section-progress { font-size: 0.75rem; opacity: 0.7; }

.lesson-list {
    display: none; flex-direction: column;
    gap: var(--spacing-xs); padding-left: var(--spacing-lg);
}

.lesson-list.active { display: flex; }

.lesson-item {
    display: flex; align-items: center; gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--theme-surface);
    border-radius: var(--radius-sm);
    cursor: pointer; transition: all var(--transition-fast);
    border: 2px solid var(--border-color);
}

.lesson-item:hover:not(.locked) { background: var(--theme-card); border-color: var(--accent-secondary); }
.lesson-item.active { background: rgba(255, 107, 53, 0.2); border-color: var(--accent-primary); }
.lesson-item.completed { background: rgba(37, 165, 95, 0.15); border-color: var(--accent-green); }
.lesson-item.locked { opacity: 0.5; cursor: not-allowed; }

.lesson-number {
    width: 28px; height: 28px;
    border-radius: var(--radius-full);
    background: var(--border-color);
    color: var(--a-color);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.8rem; font-weight: 600;
}

.lesson-item.completed .lesson-number { background: var(--accent-green); }
.lesson-item.locked .lesson-number { background: var(--border-color); opacity: 0.5; }
.lesson-name { flex: 1; font-size: 0.85rem; }
.lesson-status { font-size: 1rem; }

/* ================================================
   MAIN CONTENT AREA
   ================================================ */
.tutorial-main {
    display: flex; flex-direction: column; gap: var(--spacing-lg);
}

/* Typing Area */
.typing-area {
    background: var(--theme-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

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

.lesson-title {
    display: flex; align-items: center; gap: var(--spacing-md);
}

.lesson-title h2 { margin-bottom: 0; }

.lesson-badge {
    background: var(--accent-secondary);
    color: var(--theme-invert);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem; font-weight: 600;
}

.live-stats { display: flex; gap: var(--spacing-lg); }
.live-stat { text-align: center; }
.live-stat-value { font-size: 1.5rem; font-weight: 700; color: var(--accent-primary); }
.live-stat-label { font-size: 0.7rem; text-transform: uppercase; opacity: 0.7; }

/* Character Display */
.character-display {
    background: var(--theme-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    min-height: 80px;
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}

.character-sequence {
    display: flex; flex-wrap: wrap; justify-content: center;
    gap: 4px;
    font-family: var(--font-hindi);
    font-size: 2rem; line-height: 1.2;
}

.char {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 50px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.char.active {
    background: rgba(255, 217, 61, 0.25);
    border: 2px solid var(--accent-gold);
    transform: scale(1.1);
    box-shadow: 0 0 10px rgba(255, 217, 61, 0.5);
}

.char.active::after {
    content: '';
    position: absolute; bottom: -4px; left: 50%;
    transform: translateX(-50%);
    width: 30px; height: 3px;
    background: var(--accent-primary);
    border-radius: 2px;
    animation: cursorBlink 0.8s infinite;
}

@keyframes cursorBlink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.char.correct { color: var(--accent-correct); background: rgba(37, 165, 95, 0.25); }
.char.incorrect {
    color: var(--accent-wrong);
    background: rgba(255, 89, 90, 0.35);
    border: 2px solid rgba(255, 89, 90, 0.6);
    animation: shake 0.3s ease-in-out;
}
.char.expected { border: 2px dashed var(--accent-gold); animation: pulse 1s infinite; }

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255, 217, 61, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(255, 217, 61, 0); }
}

.hidden-input { position: absolute; opacity: 0; pointer-events: none; }

.lesson-progress {
    display: flex; justify-content: space-between;
    font-size: 0.85rem; opacity: 0.7; margin-bottom: var(--spacing-md);
}

.keyboard-section {
    background: var(--theme-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.keyboard-section h4 {
    margin-bottom: var(--spacing-sm);
    display: flex; align-items: center; gap: var(--spacing-sm);
}

/* ================================================
   ACTION BUTTONS
   ================================================ */
.action-buttons {
    display: flex; justify-content: center;
    gap: var(--spacing-md); margin-top: var(--spacing-lg);
}

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none; border-radius: var(--radius-md);
    font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 0.9rem;
    cursor: pointer; transition: all var(--transition-fast);
    display: flex; align-items: center; gap: var(--spacing-sm);
}

.btn-primary { background: var(--gradient-button); color: var(--theme-invert); box-shadow: var(--shadow-sm); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--theme-surface); color: var(--text-color); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: var(--theme-card); }
.btn-success { background: var(--accent-green); color: var(--theme-invert); }

/* ================================================
   RESULTS MODAL
   ================================================ */
.results-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.75);
    display: none; align-items: center; justify-content: center;
    z-index: 1000; animation: fadeIn 0.3s ease;
}

.results-overlay.active { display: flex; }

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.results-card {
    background: var(--theme-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xxl);
    max-width: 500px; width: 90%;
    text-align: center;
    animation: slideUp 0.4s ease;
    position: relative; overflow: hidden;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.results-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 5px;
    background: var(--gradient-xp);
}

.results-icon { font-size: 4rem; margin-bottom: var(--spacing-md); }
.results-title { font-size: 1.75rem; margin-bottom: var(--spacing-sm); }
.results-subtitle { opacity: 0.7; margin-bottom: var(--spacing-lg); }

.results-stats {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md); margin-bottom: var(--spacing-lg);
}

.result-stat {
    background: var(--theme-surface); border: 1px solid var(--border-color);
    padding: var(--spacing-md); border-radius: var(--radius-md);
}

.result-stat-value { font-size: 1.75rem; font-weight: 700; color: var(--accent-gold); }
.result-stat-label { font-size: 0.75rem; text-transform: uppercase; opacity: 0.7; }

.xp-earned {
    background: rgba(255, 217, 61, 0.1); border: 2px solid var(--accent-gold);
    border-radius: var(--radius-md); padding: var(--spacing-md); margin-bottom: var(--spacing-lg);
}

.xp-earned-value { font-size: 2rem; font-weight: 800; color: var(--accent-gold); }
.xp-earned-label { font-size: 0.85rem; opacity: 0.7; }

.new-achievement {
    background: linear-gradient(135deg, var(--accent-tertiary), var(--accent-primary));
    border-radius: var(--radius-md); padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg); display: none;
}

.new-achievement.unlocked { display: block; animation: achievementPop 0.5s ease; }

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

.achievement-badge { font-size: 2rem; margin-bottom: var(--spacing-xs); }
.achievement-name { font-weight: 600; color: var(--theme-invert); }

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

/* ================================================
   LESSON SELECTION (INDEX) PAGE
   ================================================ */
.tutorial-hero {
    background: var(--theme-card); border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl) var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    position: relative; overflow: hidden;
    transition: background-color 0.3s;
}

.tutorial-hero::before {
    content: '';
    position: absolute; top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, var(--gradient-glow) 0%, transparent 50%);
    animation: heroGlow 10s linear infinite;
}

@keyframes heroGlow {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.tutorial-hero h1 {
    position: relative; font-size: 3rem; line-height: 1.5;
    padding-top: 0.2em; margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-gold));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.tutorial-hero p {
    position: relative; font-size: 1.1rem; opacity: 0.8;
    max-width: 100%; margin: var(--spacing-md) 0 0 0; text-align: left;
}

.quick-start {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg); margin-top: var(--spacing-xl);
}

.quick-start-card {
    background: var(--theme-card); border-radius: var(--radius-lg);
    padding: var(--spacing-xl); text-align: center;
    cursor: pointer; transition: all var(--transition-normal);
    border: 2px solid var(--border-color);
}

.quick-start-card:hover {
    transform: translateY(-5px); border-color: var(--accent-secondary); box-shadow: var(--shadow-lg);
}

.quick-start-icon { font-size: 3rem; margin-bottom: var(--spacing-md); }
.quick-start-card h3 { margin-bottom: var(--spacing-sm); }
.quick-start-card p { font-size: 0.9rem; opacity: 0.7; }

/* ================================================
   RESPONSIVE DESIGN
   ================================================ */
@media (max-width: 1024px) {
    .tutorial-layout { grid-template-columns: 1fr; }
    .tutorial-sidebar { flex-direction: row; flex-wrap: wrap; }
    .profile-section { flex: 1; min-width: 250px; }
    .lesson-selector { max-height: 300px; flex: 2; min-width: 300px; }
    .keyboard-section { display: none; }
}

@media (max-width: 768px) {
    .tutorial-container { padding: var(--spacing-md); }
    .tutorial-hero h1 { font-size: 2rem; line-height: 1.5; }
    .character-sequence { font-size: 1.8rem; }
    .char { width: 35px; height: 45px; }
    .live-stats { gap: var(--spacing-md); }
    .results-stats { grid-template-columns: repeat(2, 1fr); }
    .action-buttons { flex-wrap: wrap; }
    .btn { flex: 1; justify-content: center; min-width: 120px; }
}

@media (max-width: 480px) {
    .profile-section { min-width: 100%; }
    .stats-grid { grid-template-columns: repeat(4, 1fr); }
    .stat-item { padding: var(--spacing-xs); }
    .stat-value { font-size: 1rem; }
}

/* ================================================
   UTILITY CLASSES
   ================================================ */
.text-center { text-align: center; }
.text-gold { color: var(--accent-gold); }
.text-green { color: var(--accent-green); }
.text-primary { color: var(--accent-primary); }
.text-secondary { color: var(--accent-secondary); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }
.visible { display: block !important; }