/* =============================================================================
   Space Invaders AI — Styles
   Matches the dino app.css aesthetic: Apple-like, clean, minimal
   ============================================================================= */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f7f7f7;
    color: #1d1d1f;
    line-height: 1.6;
}

.si-page {
    max-width: 740px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    text-align: center;
    margin-bottom: 4px;
}

.si-subtitle {
    text-align: center;
    color: #6e6e73;
    font-size: 15px;
    margin-bottom: 32px;
}

h2 {
    font-size: 22px;
    font-weight: 700;
    margin: 48px 0 12px;
    letter-spacing: -0.3px;
}

p {
    margin-bottom: 12px;
    font-size: 15px;
    color: #1d1d1f;
}

.si-prose {
    margin-bottom: 20px;
    font-size: 15px;
    line-height: 1.65;
}

.si-prose em {
    font-style: italic;
}

/* Game container */
.si-game-box {
    background: #fff;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    margin: 16px 0 20px;
}

.si-game-box canvas {
    display: block;
    border-radius: 4px;
    image-rendering: pixelated;
    width: 100%;
    max-width: 600px;
}

/* Controls row */
.si-controls {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-top: 10px;
    flex-wrap: wrap;
}

.si-help {
    color: #86868b;
    font-size: 12px;
    margin-top: 6px;
}

/* Buttons */
.si-btn {
    padding: 6px 16px;
    border-radius: 8px;
    border: 1px solid #d2d2d7;
    background: #fff;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    color: #1d1d1f;
    transition: background 0.15s;
    font-family: inherit;
}
.si-btn:hover { background: #f0f0f5; }

.si-btn.active {
    background: #0071e3;
    color: #fff;
    border-color: #0071e3;
}
.si-btn.active:hover { background: #0062c4; }

.si-btn.danger {
    color: #e8453c;
    border-color: #e8453c;
}
.si-btn.danger:hover { background: #fef2f1; }

/* Speed slider */
.si-speed {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: #6e6e73;
}

.si-speed input[type=range] {
    width: 100px;
    accent-color: #0071e3;
}

/* Stats line */
.si-stats {
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: #6e6e73;
    margin-top: 6px;
}

/* Demo / visualization boxes */
.si-viz-box {
    background: #fff;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    margin: 12px 0;
}

.si-viz-box h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
}

.si-viz-box .si-caption {
    color: #86868b;
    font-size: 12px;
    margin-top: 8px;
}

/* NN SVG styles */
.nn-node {
    transition: fill 0.15s;
}
.nn-input {
    fill: #f0f0f5;
    stroke: #c7c7cc;
    stroke-width: 1;
}
.nn-hidden {
    fill: #f0f0f5;
    stroke: #d2d2d7;
    stroke-width: 1;
}
.nn-output {
    fill: #f0f0f5;
    stroke: #d2d2d7;
    stroke-width: 1;
}
.nn-edge {
    stroke-linecap: round;
}
.nn-label {
    font-size: 10px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    fill: #6e6e73;
}
.nn-label-right {
    font-weight: 600;
}
.nn-layer-title {
    font-size: 11px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    fill: #86868b;
    font-weight: 500;
}

/* Chart canvas */
.si-chart-canvas {
    width: 100%;
    max-width: 500px;
    height: 200px;
    display: block;
}

/* Placeholder sections */
.si-placeholder {
    color: #86868b;
    font-style: italic;
    padding: 24px;
    text-align: center;
    background: #f0f0f5;
    border-radius: 8px;
    margin: 16px 0;
    font-size: 14px;
}

/* Agent Showdown grid */
.si-showdown-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.si-showdown-cell {
    background: #fff;
    border-radius: 10px;
    padding: 10px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    width: 224px;
    text-align: center;
}

.si-showdown-cell canvas {
    display: block;
    width: 204px;
    height: 136px;
    border-radius: 4px;
    image-rendering: pixelated;
    margin: 0 auto;
}

.si-showdown-label {
    font-size: 12px;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 6px;
}

.si-showdown-score {
    font-family: 'Courier New', monospace;
    font-size: 11px;
    color: #6e6e73;
    margin-top: 6px;
}

/* Disabled button style */
.si-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.si-btn:disabled:hover {
    background: #fff;
}