/* Typing Speed Test - Clean Terminal Aesthetic */
:root {
    --bg-primary: #0c0c10;
    --bg-secondary: #14141a;
    --bg-card: #1a1a22;
    --accent-cyan: #00d9ff;
    --accent-cyan-glow: rgba(0, 217, 255, 0.3);
    --accent-green: #00ff88;
    --accent-red: #ff4757;
    --accent-yellow: #f7a600;
    --accent-purple: #a855f7;
    --text-primary: #e2e8f0;
    --text-secondary: #64748b;
    --text-muted: #475569;
    --text-correct: #00ff88;
    --text-error: #ff4757;
    --text-current: #00d9ff;
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition-fast: 100ms ease;
    --transition-base: 200ms ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; overflow-x: hidden; }
body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 50% 0%, rgba(0, 217, 255, 0.03) 0%, transparent 50%);
    color: var(--text-primary);
}

/* Navigation */
.game-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(12, 12, 16, 0.95);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid rgba(0, 217, 255, 0.1);
}

.back-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}
.back-link svg { width: 20px; height: 20px; }
.back-link:hover { color: var(--accent-cyan); }

.game-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.nav-spacer { width: 100px; }

/* Container */
.game-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5rem 1.5rem 2rem;
}

/* Screens */
.screen { display: none; width: 100%; max-width: 800px; animation: fadeIn 0.3s ease; }
.screen.active { display: block; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.screen-content {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 217, 255, 0.1);
    text-align: center;
}

/* Intro Screen */
.game-icon { font-size: 4rem; margin-bottom: 1rem; }

.intro-screen h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.tagline { color: var(--text-secondary); margin-bottom: 2rem; }

/* Duration Selector */
.duration-selector { margin-bottom: 2rem; }
.duration-selector h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.duration-options { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.duration-btn {
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-base);
}
.duration-btn:hover { border-color: var(--accent-cyan); color: var(--text-primary); }
.duration-btn.active { 
    border-color: var(--accent-cyan); 
    background: rgba(0, 217, 255, 0.1);
    color: var(--accent-cyan);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, #00a8cc 100%);
    color: var(--bg-primary);
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 9999px;
    cursor: pointer;
    transition: var(--transition-base);
    font-family: var(--font-sans);
}
.btn-primary svg { width: 20px; height: 20px; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 40px var(--accent-cyan-glow); }

.btn-secondary {
    padding: 0.75rem 1.5rem;
    background: transparent;
    border: 2px solid var(--text-muted);
    color: var(--text-secondary);
    border-radius: 9999px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    font-family: var(--font-sans);
}
.btn-secondary:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }

/* Best Scores */
.best-scores {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.best-score-item { text-align: center; }
.best-score-item .label { display: block; font-size: 0.85rem; color: var(--text-muted); }
.best-score-item .value { font-size: 1.75rem; font-weight: 700; color: var(--accent-yellow); font-family: var(--font-mono); }

/* Game Screen */
.game-screen { max-width: 900px; }

.game-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2rem;
}
.stat-box { text-align: center; }
.stat-box .stat-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
    line-height: 1;
}
.stat-box.highlight .stat-value { color: var(--accent-cyan); text-shadow: 0 0 20px var(--accent-cyan-glow); }
.stat-box .stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Typing Area */
.typing-area {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 217, 255, 0.1);
    padding: 2rem;
    position: relative;
}

.text-display {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    line-height: 2;
    letter-spacing: 0.02em;
    color: var(--text-muted);
    text-align: left;
    min-height: 150px;
    margin-bottom: 1.5rem;
    user-select: none;
}

.text-display .char { transition: color var(--transition-fast); }
.text-display .char.correct { color: var(--text-correct); }
.text-display .char.error { color: var(--text-error); text-decoration: underline; }
.text-display .char.current { 
    color: var(--text-current); 
    border-left: 2px solid var(--accent-cyan);
    animation: blink 1s infinite;
    margin-left: -1px;
    padding-left: 1px;
}
@keyframes blink { 0%, 100% { border-color: var(--accent-cyan); } 50% { border-color: transparent; } }

.input-area {
    width: 100%;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 2px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    resize: none;
    outline: none;
    transition: var(--transition-base);
}
.input-area:focus { border-color: var(--accent-cyan); box-shadow: 0 0 20px var(--accent-cyan-glow); }
.input-area::placeholder { color: var(--text-muted); }

.keyboard-hint {
    margin-top: 1.5rem;
    text-align: center;
}
.hint-text {
    font-size: 0.85rem;
    color: var(--text-muted);
}
kbd {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--text-muted);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    margin: 0 0.1rem;
}

/* Results Screen */
.results-header { margin-bottom: 2rem; }
.wpm-result { display: inline-block; }
.wpm-value {
    font-size: 5rem;
    font-weight: 800;
    font-family: var(--font-mono);
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}
.wpm-label {
    display: block;
    font-size: 1.25rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.accuracy-bar {
    position: relative;
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: 2rem;
}
.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-green) 0%, var(--accent-cyan) 100%);
    border-radius: 9999px;
    transition: width 1s ease;
}
.bar-label {
    position: absolute;
    right: 0;
    top: -1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-green);
    font-family: var(--font-mono);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}
.result-item { text-align: center; }
.result-item .result-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
}
.result-item.correct .result-value { color: var(--accent-green); }
.result-item.error .result-value { color: var(--accent-red); }
.result-item .result-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.new-record {
    background: rgba(247, 166, 0, 0.1);
    border: 1px solid var(--accent-yellow);
    color: var(--accent-yellow);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    margin-bottom: 1.5rem;
    animation: glow 2s infinite;
}
@keyframes glow { 0%, 100% { box-shadow: 0 0 10px rgba(247, 166, 0, 0.2); } 50% { box-shadow: 0 0 25px rgba(247, 166, 0, 0.4); } }

.results-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Responsive */
@media (max-width: 768px) {
    .game-nav { padding: 0.75rem 1rem; }
    .game-title { font-size: 1rem; }
    .nav-spacer { display: none; }
    .screen-content { padding: 1.5rem; }
    .game-stats { gap: 1.5rem; }
    .stat-box .stat-value { font-size: 1.75rem; }
    .typing-area { padding: 1.25rem; }
    .text-display { font-size: 1.1rem; min-height: 120px; }
    .wpm-value { font-size: 3.5rem; }
    .results-grid { grid-template-columns: repeat(2, 1fr); }
    .best-scores { gap: 2rem; }
}

@media (max-width: 480px) {
    .duration-options { flex-wrap: wrap; }
    .duration-btn { flex: 1; min-width: 60px; }
}