:root {
    --bg-color: #0b0c10;
    --card-bg: rgba(22, 26, 37, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-border-glow: rgba(255, 107, 139, 0.25);
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    
    --accent-pink: #ff6b8b;
    --accent-pink-glow: rgba(255, 107, 139, 0.4);
    --accent-teal: #2ed573;
    --accent-teal-glow: rgba(46, 213, 115, 0.4);
    --accent-purple: #a55eea;
    --accent-purple-glow: rgba(165, 94, 234, 0.4);
    --accent-gold: #ffa502;
    --accent-gold-glow: rgba(255, 165, 2, 0.4);
    
    --font-sans: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;
    --font-japanese: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", sans-serif;
    
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(255, 107, 139, 0.2);
    
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(165, 94, 234, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(255, 107, 139, 0.08) 0%, transparent 40%);
    background-attachment: fixed;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-pink);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header & Navigation */
header {
    margin-bottom: 30px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    position: relative;
    border: 1px solid var(--card-border);
}

.hero-banner {
    height: 220px;
    background-image: url('../assets/hero.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: flex-end;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(11, 12, 16, 0.95) 10%, rgba(11, 12, 16, 0.4) 100%);
}

.hero-text {
    position: relative;
    z-index: 2;
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    width: 100%;
}

.hero-title h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #fff 30%, var(--accent-pink) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 5px;
}

.hero-title p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.stats-badge {
    background: rgba(255, 255, 255, 0.05);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 50px;
    display: flex;
    gap: 15px;
    font-size: 0.9rem;
}

.stats-badge span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.stats-badge strong {
    color: var(--accent-gold);
}

nav {
    background: rgba(18, 22, 33, 0.8);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    display: flex;
    overflow-x: auto;
    padding: 10px;
    gap: 5px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-tab {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 12px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition-smooth);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-tab:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.03);
}

.nav-tab.active {
    color: #fff;
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    box-shadow: 0 4px 15px var(--accent-pink-glow);
}

/* Tabs Content Container */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

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

/* Base Card Design */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    padding: 25px;
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-soft);
    margin-bottom: 25px;
    transition: var(--transition-smooth);
}

.glass-card:hover {
    border-color: var(--card-border-glow);
    box-shadow: var(--shadow-soft), var(--shadow-glow);
}

.card-title {
    font-size: 1.4rem;
    font-weight: 750;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
}

.card-title span.badge {
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 6px;
    background: rgba(255, 107, 139, 0.15);
    color: var(--accent-pink);
    border: 1px solid var(--accent-pink);
}

/* Day Curriculum Section */
.curriculum-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 25px;
}

@media (max-width: 900px) {
    .curriculum-grid {
        grid-template-columns: 1fr;
    }
}

.day-selector {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.day-pane {
    display: none;
    animation: slideIn 0.3s ease;
}

.day-pane.active {
    display: block;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(15px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Kana Grid Layout */
.kana-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    gap: 15px;
    flex-wrap: wrap;
}

.toggle-group {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px;
    border-radius: 10px;
    border: 1px solid var(--card-border);
}

.toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.toggle-btn.active {
    background: var(--card-bg);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.kana-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

@media (max-width: 600px) {
    .kana-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 8px;
    }
}

.kana-cell {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 15px 10px;
    text-align: center;
    cursor: pointer;
    position: relative;
    transition: var(--transition-smooth);
    user-select: none;
}

.kana-cell:hover:not(.empty) {
    background: rgba(255, 107, 139, 0.08);
    border-color: var(--accent-pink);
    transform: translateY(-3px);
}

.kana-cell.empty {
    border: none;
    background: transparent;
    cursor: default;
    pointer-events: none;
}

.kana-char {
    font-family: var(--font-japanese);
    font-size: 2.2rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 2px;
    line-height: 1.1;
}

.kana-romaji {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.kana-cell:hover:not(.empty) .kana-romaji {
    color: var(--accent-pink);
}

.play-icon {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 0.65rem;
    color: var(--text-muted);
    opacity: 0;
    transition: var(--transition-smooth);
}

.kana-cell:hover:not(.empty) .play-icon {
    opacity: 0.6;
}

/* Practice Canvas Writer */
.canvas-container {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 25px;
}

@media (max-width: 768px) {
    .canvas-container {
        grid-template-columns: 1fr;
    }
}

.canvas-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 15px;
    padding: 20px;
    border: 1px solid var(--card-border);
}

canvas {
    background: #14161f;
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    cursor: crosshair;
    touch-action: none;
    max-width: 100%;
}

.canvas-controls {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    width: 100%;
    justify-content: center;
}

.btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 8px;
    user-select: none;
}

.btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    border: none;
    color: #fff;
}

.btn-primary:hover {
    box-shadow: 0 4px 15px var(--accent-pink-glow);
    transform: translateY(-1px);
}

.btn-teal {
    background: linear-gradient(135deg, var(--accent-teal), #10ac84);
    border: none;
    color: #fff;
}

.btn-teal:hover {
    box-shadow: 0 4px 15px var(--accent-teal-glow);
    transform: translateY(-1px);
}

.btn-gold {
    background: linear-gradient(135deg, var(--accent-gold), #e67e22);
    border: none;
    color: #fff;
}

.btn-gold:hover {
    box-shadow: 0 4px 15px var(--accent-gold-glow);
    transform: translateY(-1px);
}

.canvas-guide-card {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.guide-char-box {
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 15px;
    height: 180px;
    border: 1px solid var(--card-border);
    position: relative;
}

.guide-char {
    font-family: var(--font-japanese);
    font-size: 7.5rem;
    color: #fff;
    opacity: 0.95;
    text-shadow: 0 0 20px rgba(255,255,255,0.1);
}

.guide-char-romaji {
    position: absolute;
    bottom: 10px;
    right: 15px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-pink);
    text-transform: uppercase;
}

.guide-char-type {
    position: absolute;
    top: 10px;
    left: 15px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(255,255,255,0.06);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--text-muted);
}

.canvas-guide-nav {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

/* Flashcards 3D Card Flip */
.flashcard-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
    max-width: 500px;
    margin: 0 auto;
    padding: 20px 0;
}

.flashcard-container {
    perspective: 1000px;
    width: 100%;
    height: 300px;
    cursor: pointer;
}

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

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

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 30px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-soft);
}

.card-front {
    background: linear-gradient(135deg, #181d28, #111520);
    color: #fff;
    border-color: rgba(255, 107, 139, 0.15);
}

.card-front::after {
    content: "Tap to Flip";
    position: absolute;
    bottom: 20px;
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
    animation: pulse 2s infinite;
}

.card-back {
    background: linear-gradient(135deg, #121622, #0d101a);
    color: #fff;
    transform: rotateY(180deg);
    border-color: rgba(165, 94, 234, 0.15);
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

.flashcard-main-txt {
    font-size: 6rem;
    font-family: var(--font-japanese);
    margin-bottom: 10px;
    line-height: 1;
}

.flashcard-sub-txt {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-pink);
    margin-bottom: 5px;
}

.flashcard-meaning {
    font-size: 1.8rem;
    font-weight: 750;
    text-align: center;
    margin-bottom: 5px;
}

.flashcard-romaji {
    font-size: 1.1rem;
    color: var(--accent-purple);
    font-weight: 600;
    text-transform: uppercase;
}

.flashcard-type {
    position: absolute;
    top: 20px;
    left: 20px;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(255,255,255,0.05);
    padding: 3px 8px;
    border-radius: 4px;
}

.flashcard-btn-row {
    display: flex;
    gap: 15px;
    width: 100%;
}

.flashcard-btn-row button {
    flex: 1;
}

/* Sentence Builder */
.sentence-builder-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.word-bank {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    background: rgba(0,0,0,0.2);
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    min-height: 60px;
    align-items: center;
}

.word-chip {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition-smooth);
    user-select: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.word-chip:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.3);
}

.word-chip.particle {
    background: rgba(165, 94, 234, 0.1);
    border-color: var(--accent-purple);
    color: #fff;
    font-weight: 700;
}

.word-chip.particle:hover {
    background: rgba(165, 94, 234, 0.2);
    box-shadow: 0 0 10px var(--accent-purple-glow);
}

.chip-ja {
    font-family: var(--font-japanese);
    font-size: 1.15rem;
    font-weight: 600;
}

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

.sentence-workspace {
    background: rgba(11, 12, 16, 0.8);
    border: 2px dashed rgba(255, 107, 139, 0.2);
    border-radius: 15px;
    padding: 25px;
    min-height: 100px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    transition: var(--transition-smooth);
}

.sentence-workspace.dragover {
    background: rgba(255, 107, 139, 0.03);
    border-color: var(--accent-pink);
}

.sentence-workspace.correct {
    border-color: var(--accent-teal);
    background: rgba(46, 213, 115, 0.03);
}

.sentence-workspace .word-chip {
    animation: scalePop 0.2s ease;
}

@keyframes scalePop {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.sentence-builder-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.sentence-feedback {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 24px;
}

.sentence-feedback.success {
    color: var(--accent-teal);
}

.sentence-feedback.error {
    color: var(--accent-pink);
}

/* Grammar Table styling inside Day Curriculums */
.grammar-table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

.grammar-table th, .grammar-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}

.grammar-table th {
    color: var(--accent-pink);
    font-weight: 600;
}

.grammar-table td span.ja-word {
    font-family: var(--font-japanese);
    font-size: 1.1rem;
    color: #fff;
}

.grammar-card {
    background: rgba(255, 255, 255, 0.02);
    border-left: 4px solid var(--accent-purple);
    padding: 15px;
    border-radius: 0 12px 12px 0;
    margin: 15px 0;
}

.grammar-card-title {
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--accent-purple);
}

.bullet-list {
    list-style: none;
    margin: 10px 0;
}

.bullet-list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
}

.bullet-list li::before {
    content: "🌸";
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 0.8rem;
}

/* Interactive speaker symbol for lessons */
.speak-btn {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    padding: 2px 8px;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-muted);
    gap: 4px;
    transition: var(--transition-smooth);
}

.speak-btn:hover {
    background: rgba(255, 107, 139, 0.1);
    border-color: var(--accent-pink);
    color: var(--accent-pink);
}

.speak-btn i {
    font-size: 0.75rem;
}

/* ========================================= */
/* RPG AND GAME MECHANICS EXTENSIONS        */
/* ========================================= */

/* Game Status HUD */
.game-hud {
    background: linear-gradient(135deg, rgba(22, 26, 37, 0.85) 0%, rgba(13, 16, 26, 0.95) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 18px;
    padding: 15px 25px;
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

.hud-stat {
    flex: 1;
    min-width: 150px;
}

.stat-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}

.hud-bar-container {
    width: 100%;
    height: 12px;
    background: rgba(0,0,0,0.4);
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.hud-bar-fill {
    height: 100%;
    width: 100%;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.hud-bar-fill.hp {
    background: linear-gradient(90deg, #ff4d4d, var(--accent-teal));
    box-shadow: 0 0 10px rgba(46, 213, 115, 0.2);
}

.hud-bar-fill.xp {
    background: linear-gradient(90deg, var(--accent-pink), var(--accent-purple));
    box-shadow: 0 0 10px rgba(165, 94, 234, 0.2);
}

.hud-gold {
    font-size: 1.1rem;
    font-weight: 750;
    color: var(--accent-gold);
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 165, 2, 0.1);
    padding: 8px 16px;
    border-radius: 30px;
    border: 1px solid rgba(255, 165, 2, 0.2);
}

.hud-level {
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 16px;
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Quest Levels Selection Grid */
.quest-selection-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .quest-selection-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 480px) {
    .quest-selection-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.quest-tier-btn {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 12px 8px;
    text-align: center;
    cursor: pointer;
    font-weight: 700;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.quest-tier-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.quest-tier-btn.active {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    color: #fff;
    border: none;
    box-shadow: 0 4px 12px var(--accent-pink-glow);
}

/* RPG Quest Arena Layout */
.rpg-arena {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 25px;
}

@media (max-width: 900px) {
    .rpg-arena {
        grid-template-columns: 1fr;
    }
}

/* Enemy Monster Box */
.enemy-panel {
    background: radial-gradient(circle at center, rgba(165, 94, 234, 0.05) 0%, rgba(20, 24, 33, 0.9) 100%);
    border: 1px solid var(--card-border);
    border-radius: 18px;
    padding: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 320px;
    position: relative;
    overflow: hidden;
}

.enemy-panel::before {
    content: "";
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(255, 107, 139, 0.08) 0%, transparent 60%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.enemy-info {
    text-align: center;
    width: 100%;
    z-index: 2;
}

.enemy-name {
    font-size: 1.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 5px;
    letter-spacing: 0.5px;
}

.enemy-hp-container {
    width: 80%;
    margin: 0 auto 15px auto;
}

.monster-sprite {
    font-size: 6rem;
    font-family: var(--font-japanese);
    color: #fff;
    animation: floatMonster 3s ease-in-out infinite;
    text-align: center;
    margin: 15px 0;
    text-shadow: 0 0 30px rgba(255, 107, 139, 0.4);
    font-weight: 700;
    z-index: 2;
}

@keyframes floatMonster {
    0% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-12px) scale(1.05); }
    100% { transform: translateY(0) scale(1); }
}

.monster-sub {
    font-size: 0.95rem;
    color: var(--accent-pink);
    font-weight: 600;
    margin-top: 5px;
    z-index: 2;
}

/* Combat Interactive Battle Logs */
.battle-logs-wrapper {
    background: #08090d;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 12px;
    width: 100%;
    height: 90px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.log-entry {
    margin-bottom: 4px;
    border-bottom: 1px solid rgba(255,255,255,0.02);
    padding-bottom: 2px;
}

.log-entry.damage { color: #ff4d4d; }
.log-entry.heal { color: var(--accent-teal); }
.log-entry.system { color: var(--accent-gold); }
.log-entry.critical { color: var(--accent-purple); font-weight: bold; }

/* Combat Options / Answers Box */
.combat-controls {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.combat-question-box {
    margin-bottom: 20px;
}

.combat-question-title {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.combat-question-text {
    font-size: 1.6rem;
    font-weight: 750;
    color: #fff;
    line-height: 1.4;
}

.combat-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 15px;
}

@media (max-width: 480px) {
    .combat-options-grid {
        grid-template-columns: 1fr;
    }
}

/* Inventory Item HUD Slots */
.hud-inventory-box {
    display: flex;
    gap: 10px;
    background: rgba(0,0,0,0.2);
    padding: 10px 15px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    align-items: center;
}

.inventory-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
}

.inventory-slot {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px dashed var(--card-border);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.1rem;
    cursor: pointer;
    position: relative;
    transition: var(--transition-smooth);
}

.inventory-slot:hover:not(.empty) {
    background: rgba(255, 255, 255, 0.08);
    transform: scale(1.08);
}

.inventory-slot.empty {
    cursor: default;
    color: rgba(255,255,255,0.05);
}

.inventory-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--accent-pink);
    color: #fff;
    font-size: 0.65rem;
    font-weight: bold;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Shop Grid Layout */
.shop-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 15px;
}

@media (max-width: 768px) {
    .shop-grid {
        grid-template-columns: 1fr;
    }
}

.shop-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    border-radius: 15px;
    padding: 20px;
    text-align: center;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.shop-card:hover {
    border-color: var(--accent-gold);
    background: rgba(255, 165, 2, 0.03);
    transform: translateY(-3px);
}

.shop-icon {
    font-size: 2.2rem;
    color: var(--accent-gold);
    margin-bottom: 10px;
}

.shop-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 5px;
}

.shop-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 15px;
    line-height: 1.4;
}

.shop-cost {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--accent-gold);
    margin-bottom: 15px;
}

/* Telugu-Japanese Grammar Bridge */
.telugu-header {
    background: linear-gradient(135deg, rgba(165, 94, 234, 0.15), rgba(46, 213, 115, 0.15));
    border-left: 4px solid var(--accent-teal);
    padding: 15px;
    border-radius: 0 12px 12px 0;
    margin-bottom: 25px;
}

.telugu-header h3 {
    font-size: 1.2rem;
    color: #fff;
    margin-bottom: 5px;
}

.telugu-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.telugu-table th, .telugu-table td {
    padding: 14px;
    border-bottom: 1px solid var(--card-border);
    text-align: left;
}

.telugu-table th {
    background: rgba(255, 255, 255, 0.03);
    color: var(--accent-pink);
    font-weight: 700;
}

.telugu-table tr:hover {
    background: rgba(255, 255, 255, 0.01);
}

.telugu-script {
    font-family: var(--font-sans);
    font-size: 1.05rem;
    color: var(--accent-teal);
    font-weight: 600;
}

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

.japanese-script {
    font-family: var(--font-japanese);
    font-size: 1.2rem;
    color: #fff;
}

.formula-card {
    background: rgba(255,255,255,0.02);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
    border: 1px solid var(--card-border);
}

.formula-box {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    font-weight: 700;
    background: rgba(0,0,0,0.3);
    padding: 12px;
    border-radius: 8px;
    margin: 10px 0;
    color: #fff;
    flex-wrap: wrap;
}

.formula-arrow {
    color: var(--accent-pink);
}

/* SRS Animations & styles */
.flashcard-container.slide-out {
    transform: scale(0.9) translateX(200px);
    opacity: 0;
    transition: transform 0.4s ease-in-out, opacity 0.4s ease-in-out;
}

/* ========== MOBILE RESPONSIVE ========== */
@media (max-width: 768px) {
    .container { padding: 10px; }
    .hero-banner { min-height: 180px; }
    .hero-text { flex-direction: column; align-items: flex-start; gap: 12px; padding: 15px; }
    .hero-title h1 { font-size: 1.6rem; }
    .hero-title p { font-size: 0.8rem; }
    #main-nav { flex-wrap: wrap; gap: 4px; padding: 8px; }
    .nav-tab { font-size: 0.7rem; padding: 8px 10px; }
    .nav-tab i { display: none; }
    .glass-card { padding: 15px; }
    .card-title { font-size: 1rem; }
    .rpg-arena { grid-template-columns: 1fr !important; }
    .game-hud { flex-direction: column; gap: 10px; align-items: stretch; }
    .monster-sprite { font-size: 4rem; }
    .quest-tier-btn { padding: 6px 10px; font-size: 0.75rem; }
    .shop-grid { grid-template-columns: 1fr !important; }
    .curriculum-grid { grid-template-columns: 1fr !important; }
    .kana-grid { grid-template-columns: repeat(5, 1fr) !important; gap: 4px !important; }
    .kana-cell { padding: 8px; }
    .kana-char { font-size: 1.2rem; }
    .canvas-container { flex-direction: column; }
    .canvas-wrapper canvas { width: 100% !important; height: 280px !important; }
    .flashcard-container { width: 280px; height: 200px; }
    .flashcard-main-txt { font-size: 3rem; }
    .sentence-workspace, .word-bank { min-height: 60px; }
    .word-chip { padding: 6px 10px; font-size: 0.8rem; }
    .telugu-table { font-size: 0.75rem; }
    .telugu-table th, .telugu-table td { padding: 6px 8px; }
    .formula-card { padding: 12px; }
    .stats-badge { font-size: 0.75rem; gap: 10px; }
    .hud-inventory-box { gap: 6px; padding: 8px 12px; }
    .inventory-slot { width: 36px; height: 36px; font-size: 0.95rem; }
    #calc-grid-layout { grid-template-columns: 1fr !important; }
}

@media (max-width: 480px) {
    .hero-title h1 { font-size: 1.3rem; }
    .nav-tab { font-size: 0.65rem; padding: 6px 8px; }
    .flashcard-container { width: 240px; height: 180px; }
    .flashcard-main-txt { font-size: 2.5rem; }
    .monster-sprite { font-size: 3rem; }
}

/* Site footer / attribution */
.site-footer {
    margin-top: 40px;
    padding: 24px 16px;
    text-align: center;
    border-top: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.7;
}
.site-footer a {
    color: var(--accent-teal);
    text-decoration: none;
    font-weight: 700;
}
.site-footer a:hover { text-decoration: underline; }

/* First-visit onboarding overlay */
.onboarding-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(6, 7, 12, 0.82);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    padding: 20px;
    overflow-y: auto;
    justify-content: center;
    align-items: flex-start;
}
.onboarding-overlay.show { display: flex; }
.onboarding-card { max-width: 640px; width: 100%; margin: auto; }
.onboarding-hero h2 { color: #fff; font-size: 1.6rem; margin-bottom: 8px; }
.onboarding-hero p { color: var(--text-muted); margin-bottom: 22px; }
.onboarding-section { margin-bottom: 22px; }
.onboarding-section h3 { color: #fff; font-size: 1.05rem; margin-bottom: 6px; }
.onboarding-hint { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 12px; }
.onboard-lang-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.onboard-lang-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 10px 14px;
    border-radius: 10px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}
.onboard-lang-btn:hover { border-color: rgba(255, 255, 255, 0.25); }
.onboard-lang-btn.active {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    border-color: var(--accent-pink);
    color: #fff;
}
.onboard-tour { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.onboard-tour-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 10px 12px;
}
.onboard-tour-item i { color: var(--accent-teal); font-size: 1.1rem; width: 22px; text-align: center; }
.onboard-tour-item strong { display: block; color: #fff; font-size: 0.85rem; }
.onboard-tour-item span { display: block; color: var(--text-muted); font-size: 0.75rem; }
.onboarding-actions { display: flex; align-items: center; gap: 16px; margin-top: 8px; }
.onboard-skip { color: var(--text-muted); font-size: 0.85rem; text-decoration: none; }
.onboard-skip:hover { color: var(--text-main); text-decoration: underline; }
@media (max-width: 480px) {
    .onboard-tour { grid-template-columns: 1fr; }
    .onboarding-hero h2 { font-size: 1.3rem; }
}

/* Floating help button + per-page help overlay */
.help-fab {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 900;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.4);
}
.help-fab:hover { filter: brightness(1.1); }
.help-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(6, 7, 12, 0.82);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    padding: 20px;
    justify-content: center;
    align-items: center;
}
.help-overlay.show { display: flex; }
.help-card { max-width: 460px; width: 100%; }
.help-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.help-head h3 { color: #fff; font-size: 1.2rem; }
.help-close { background: none; border: none; color: var(--text-muted); font-size: 1.6rem; line-height: 1; cursor: pointer; }
.help-close:hover { color: #fff; }
.help-overlay p { color: var(--text-muted); line-height: 1.6; margin-bottom: 18px; }
.help-actions { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }

/* Footer star / sponsor CTAs */
.site-footer .footer-cta { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 14px; }
.site-footer .footer-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 9px 16px; border-radius: 50px;
    font-weight: 700; font-size: 0.85rem; text-decoration: none;
    border: 1px solid var(--card-border);
    transition: var(--transition-smooth);
}
.site-footer .footer-btn:hover { text-decoration: none; }
.site-footer .footer-btn-star { color: var(--accent-gold); border-color: rgba(255, 165, 2, 0.4); background: rgba(255, 165, 2, 0.08); }
.site-footer .footer-btn-star:hover { background: rgba(255, 165, 2, 0.18); }
.site-footer .footer-btn-sponsor { color: var(--accent-pink); border-color: rgba(255, 107, 139, 0.4); background: rgba(255, 107, 139, 0.08); }
.site-footer .footer-btn-sponsor:hover { background: rgba(255, 107, 139, 0.18); }

/* Data-driven lesson curriculum nav (level-grouped) */
.lesson-nav { display: flex; flex-direction: column; gap: 6px; }
.lesson-level-header {
    font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1px;
    color: var(--accent-pink); font-weight: 800; margin: 14px 0 4px; padding-left: 2px;
}
.lesson-level-header:first-child { margin-top: 0; }
.lesson-soon { font-size: 0.8rem; color: var(--text-muted); padding: 4px 8px 8px; opacity: 0.65; }
.lesson-btn {
    display: flex; align-items: center; gap: 10px; text-align: left;
    background: rgba(255, 255, 255, 0.02); border: 1px solid var(--card-border);
    border-radius: 10px; padding: 12px 14px; cursor: pointer;
    transition: var(--transition-smooth); color: var(--text-main); width: 100%;
}
.lesson-btn:hover { background: rgba(255, 255, 255, 0.05); border-color: rgba(255, 255, 255, 0.2); }
.lesson-btn.active {
    background: linear-gradient(135deg, rgba(255, 107, 139, 0.15), rgba(165, 94, 234, 0.15));
    border-color: var(--accent-pink);
}
.lesson-btn-num { font-size: 0.7rem; font-weight: 800; color: var(--accent-pink); min-width: 34px; }
/* === 3D / battle juice === */
/* Pointer tilt (set via JS custom props; hover devices only) */
.tilt-3d {
    transform: perspective(800px) rotateX(var(--tilt-x, 0deg)) rotateY(var(--tilt-y, 0deg)) translateZ(0);
    transition: transform 0.15s ease-out;
    will-change: transform;
}
/* Monster idle breathing */
@keyframes monsterBreathe {
    0%, 100% { transform: scale(1) translateY(0); }
    50% { transform: scale(1.05) translateY(-6px); }
}
.monster-sprite { animation: monsterBreathe 3.2s ease-in-out infinite; }
/* Hit shake + red flash */
@keyframes fxHit {
    0% { transform: translateX(0) scale(1); filter: none; }
    20% { transform: translateX(-10px) scale(0.95); filter: drop-shadow(0 0 18px rgba(255, 77, 77, 0.9)); }
    45% { transform: translateX(9px) scale(1.04); }
    70% { transform: translateX(-5px); }
    100% { transform: translateX(0) scale(1); filter: none; }
}
.fx-hit { animation: fxHit 0.45s ease both !important; }
/* Whole-arena screen shake when the player takes damage */
@keyframes fxScreenshake {
    0%, 100% { transform: translate(0, 0); }
    20% { transform: translate(-7px, 3px); }
    40% { transform: translate(6px, -4px); }
    60% { transform: translate(-4px, 2px); }
    80% { transform: translate(3px, -1px); }
}
.fx-screenshake { animation: fxScreenshake 0.4s ease both; }
/* Victory flash on the enemy panel */
@keyframes fxVictory {
    0% { filter: brightness(1); transform: scale(1); }
    30% { filter: brightness(1.8) saturate(1.5); transform: scale(1.02); }
    100% { filter: brightness(1); transform: scale(1); }
}
.fx-victory { animation: fxVictory 0.7s ease both; }
/* Floating damage numbers */
.dmg-float {
    position: fixed;
    z-index: 950;
    font-weight: 800;
    font-size: 1.5rem;
    pointer-events: none;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
    animation: dmgFloat 1s ease-out both;
}
.dmg-float.dmg-enemy { color: #ffd166; }
.dmg-float.dmg-player { color: #ff4d4d; }
.dmg-float.dmg-block { color: var(--accent-teal); font-size: 1.1rem; }
@keyframes dmgFloat {
    0% { opacity: 0; transform: translateY(6px) scale(0.7); }
    15% { opacity: 1; transform: translateY(-6px) scale(1.25); }
    100% { opacity: 0; transform: translateY(-58px) scale(1); }
}
/* 3D battle canvas fills the sprite slot */
#enemy-sprite canvas { width: 100%; height: 100%; display: block; }
#enemy-sprite.arena3d-on {
    min-height: 300px;
    animation: none; /* the WebGL tile does its own motion */
    text-shadow: none;
    margin: 5px 0;
}
/* Respect reduced motion: no juice */
@media (prefers-reduced-motion: reduce) {
    .monster-sprite { animation: none; }
    .tilt-3d { transform: none !important; transition: none; }
    .fx-hit, .fx-screenshake, .fx-victory { animation: none !important; }
    .dmg-float { display: none; }
}

/* Native-language lesson summary box (injected when a language is selected) */
.lesson-native-summary {
    background: rgba(46, 213, 115, 0.07);
    border: 1px solid rgba(46, 213, 115, 0.3);
    border-left: 4px solid var(--accent-teal);
    border-radius: 10px;
    padding: 12px 16px;
    margin-bottom: 18px;
    color: var(--text-main);
    font-size: 0.95rem;
    line-height: 1.7;
}
.lesson-btn-title { font-size: 0.9rem; font-weight: 600; color: #fff; }

/* In-lesson tab links (data-goto-tab) */
a[data-goto-tab] { color: var(--accent-teal); font-weight: 700; text-decoration: none; }
a[data-goto-tab]:hover { text-decoration: underline; }