/* Notation Performs — Style */
/* The formula is the score / the canvas is the orchestra */

:root {
    --bg: #0a0a0f;
    --bg-piece: #12121a;
    --text: #e8e8f0;
    --text-dim: #888899;
    --accent: #6699ff;
    --accent-dim: #4466aa;
    --canvas-bg: #08080c;
    --border: #2a2a3a;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
header {
    text-align: center;
    padding: 4rem 2rem 3rem;
    border-bottom: 1px solid var(--border);
    position: relative;
}

.back-link {
    position: absolute;
    top: 1.5rem;
    left: 2rem;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--accent);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.tagline {
    color: var(--text-dim);
    font-size: 0.9rem;
    font-style: italic;
}

/* Main */
main {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

/* Intro Section */
.intro {
    text-align: center;
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 3rem;
}

.intro p {
    margin-bottom: 0.75rem;
    color: var(--text-dim);
}

.intro code {
    background: var(--bg-piece);
    padding: 0.2em 0.5em;
    border-radius: 3px;
    color: var(--accent);
    font-size: 0.95em;
}

/* Pieces */
.piece {
    background: var(--bg-piece);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 3rem;
}

.piece h2 {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: var(--text);
    letter-spacing: 0.05em;
}

/* Notation Display */
.notation-display {
    text-align: center;
    padding: 1.5rem 0;
    margin-bottom: 1.5rem;
}

.katex-formula {
    margin: 0.75rem 0;
}

.katex {
    font-size: 1.3em;
}

/* Canvas */
canvas {
    display: block;
    width: 100%;
    max-width: 600px;
    height: 300px;
    margin: 0 auto 1.5rem;
    background: var(--canvas-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
}

/* Interpretation */
.interpretation {
    color: var(--text-dim);
    font-size: 0.85rem;
    text-align: center;
    margin-bottom: 1.5rem;
    font-style: italic;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Piece Controls */
.piece-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Perform Button */
.perform-btn {
    padding: 0.75rem 2rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.1em;
}

.perform-btn:hover {
    background: var(--accent);
    color: var(--bg);
}

.perform-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.perform-btn.running {
    background: var(--accent-dim);
    border-color: var(--accent-dim);
    color: var(--bg);
}

/* Reset Button */
.reset-btn {
    padding: 0.75rem 1.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    background: transparent;
    color: var(--text-dim);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.1em;
}

.reset-btn:hover {
    border-color: var(--text-dim);
    color: var(--text);
}

.reset-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Footer */
footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.85rem;
}

footer p {
    margin-bottom: 0.5rem;
}

footer a {
    color: var(--accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    main {
        padding: 1rem;
    }
    
    .piece {
        padding: 1.5rem;
    }
    
    canvas {
        height: 200px;
    }
    
    .katex {
        font-size: 1.1em;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    .perform-btn {
        transition: none;
    }
}