:root {
    --primary: #3b82f6;
    --primary-dark: #1e40af;
    --gold: #fbbf24;
    --gold-dark: #b45309;
    --danger: #ef4444;
    --success: #22c55e;
    --bg-dark: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-light: #f8fafc;
    --text-dim: #94a3b8;
}

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

body {
    font-family: 'Outfit', 'Inter', sans-serif;
    background-color: var(--bg-dark);
    background-image: radial-gradient(circle at top right, #1e293b, #0f172a);
    color: var(--text-light);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

#app {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.screen {
    transition: all 0.5s ease-in-out;
}

.hidden {
    display: none !important;
}

/* Glassmorphism Card */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.glow-text {
    color: var(--gold);
    text-shadow: 0 0 15px rgba(251, 191, 36, 0.5);
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 0.5rem;
}

.subtitle {
    text-align: center;
    color: var(--text-dim);
    margin-bottom: 2rem;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
    color: var(--text-dim);
}

select, input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.75rem;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

select:focus, input:focus {
    border-color: var(--primary);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(59, 130, 246, 0.5);
}

.btn-large {
    width: 100%;
    padding: 1rem;
    font-size: 1.25rem;
    margin-top: 1rem;
}

.btn-gold {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: #000;
}

.btn-outline {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: white;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Top Controls (View Modes & A11y) */
.top-controls {
    position: fixed;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 1000;
}

.control-btn {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
}

.control-btn:hover { background: var(--primary); }

#app {
    margin: 0 auto;
    padding: 4rem 1rem 2rem;
    transition: max-width 0.5s ease-in-out;
}

.mode-desktop { width: 100%; max-width: 900px; }
.mode-mobile { width: 100%; max-width: 400px; }

/* Battle Stage Layout */
.battle-stage {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    height: 180px;
    padding: 0 2rem;
    position: relative;
    margin-bottom: 1rem;
    background: radial-gradient(circle at bottom, rgba(59, 130, 246, 0.1), transparent 70%);
    border-radius: 2rem;
}

.hero-area, .dragon-area {
    width: 100px;
    text-align: center;
}

#hero-sprite {
    font-size: 5rem;
    color: var(--primary);
    filter: drop-shadow(0 0 15px rgba(59, 130, 246, 0.5));
    transition: transform 0.3s ease-out;
}

#dragon-sprite {
    font-size: 7rem;
    color: var(--danger);
    filter: drop-shadow(0 0 20px rgba(239, 68, 68, 0.4));
}

.hero-idle { animation: float-hero 2.5s ease-in-out infinite; }
@keyframes float-hero {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.dragon-idle { animation: float 3s ease-in-out infinite; }
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.dragon-hit {
    animation: dragon-shake 0.4s ease-in-out;
    filter: drop-shadow(0 0 30px rgba(239, 68, 68, 0.8)) sepia(1) hue-rotate(-50deg) saturate(3) !important;
}

@keyframes dragon-shake {
    0%, 100% { transform: translateX(0) scale(1); }
    25% { transform: translateX(-15px) rotate(-5deg) scale(0.9); }
    50% { transform: translateX(15px) rotate(5deg) scale(1.1); }
    75% { transform: translateX(-10px) rotate(-3deg) scale(0.95); }
}

.dragon-die {
    animation: dragon-death 1.5s forwards;
}

@keyframes dragon-death {
    0% { transform: scale(1); opacity: 1; filter: grayscale(0); }
    50% { transform: scale(0.8) translateY(20px); opacity: 0.8; filter: grayscale(0.5); }
    100% { transform: scale(0) translateY(50px) rotate(180deg); opacity: 0; filter: grayscale(1); }
}

.dragon-hp-container {
    margin: 0 1rem 2rem;
}

.hp-label-container {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.25rem;
    font-weight: bold;
    color: var(--danger);
    text-shadow: 0 0 5px rgba(239, 68, 68, 0.3);
}

.hp-bar {
    width: 100%;
    height: 1.5rem;
    background: rgba(0, 0, 0, 0.5);
    border-radius: 1rem;
    overflow: hidden;
    border: 2px solid rgba(239, 68, 68, 0.3);
}

.hp-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--danger), #b91c1c);
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal-content {
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 1rem;
}

.close-modal {
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
}

/* Table Styles */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-light);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

th {
    color: var(--gold);
    font-weight: 700;
}

tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Quiz UI */
.quiz-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    color: var(--text-dim);
    font-weight: 700;
}

.question-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
    gap: 1rem;
}

.question-box {
    font-size: 1.25rem;
    font-weight: 700;
    flex-grow: 1;
}

.tts-btn {
    flex-shrink: 0;
    padding: 0.5rem;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.option-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    padding: 1rem 1.5rem;
    border-radius: 1rem;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-light);
    font-size: 1rem;
    width: 100%;
}

.option-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
    transform: translateX(5px);
}

.option-btn.correct {
    background: rgba(34, 197, 94, 0.2);
    border-color: var(--success);
    color: #4ade80;
}

.option-btn.wrong {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--danger);
    color: #f87171;
}

/* Result UI */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-item {
    background: rgba(0,0,0,0.3);
    padding: 1.5rem;
    border-radius: 1rem;
    text-align: center;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--gold);
}

.message-box {
    text-align: center;
    font-size: 1.25rem;
    margin-bottom: 2rem;
    font-weight: 700;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (min-width: 640px) {
    .action-buttons {
        grid-template-columns: 1fr 1fr;
    }
    .btn-gold { grid-column: span 2; }
}

/* Review UI */
.review-area {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
}

.review-item {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.review-question {
    font-weight: 700;
    margin-bottom: 1rem;
}

.review-meta {
    font-size: 0.875rem;
    color: var(--text-dim);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.explanation-box {
    background: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--primary);
    padding: 1rem;
    margin-top: 1rem;
    border-radius: 0 0.5rem 0.5rem 0;
    font-size: 0.9375rem;
}

/* Animations */
@keyframes fadeOut {
    to { opacity: 0; transform: scale(0.5) rotate(10deg); }
}

/* Accessibility (A11y) Modes */
.a11y-font-large { font-size: 1.2rem; }
.a11y-font-large .question-box { font-size: 1.5rem; }
.a11y-font-large .option-btn { font-size: 1.2rem; }
.a11y-font-xlarge { font-size: 1.5rem; }
.a11y-font-xlarge .question-box { font-size: 1.8rem; }
.a11y-font-xlarge .option-btn { font-size: 1.5rem; }

.a11y-contrast-high {
    background-color: #000 !important;
    color: #fff !important;
}
.a11y-contrast-high .glass-card {
    background: #000;
    border: 2px solid #ff0;
}
.a11y-contrast-high .option-btn {
    border-color: #fff;
}
.a11y-contrast-high .option-btn.correct {
    background: #0f0; color: #000;
}
.a11y-contrast-high .option-btn.wrong {
    background: #f00; color: #000;
}

.a11y-font-dyslexia {
    font-family: 'Comic Sans MS', sans-serif !important;
    letter-spacing: 0.1em;
    word-spacing: 0.2em;
    line-height: 2;
}