/* 幾何光学シミュレーション 共通スタイル
   brush_app ブランチ */

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP",
                 "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    font-size: 14px;
    color: #1a1a2e;
    margin: 0;
    padding: 8px 12px;
    background: #f5f5f5;
    line-height: 1.6;
}

h2 {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 6px 0;
    color: #222;
    letter-spacing: 0.01em;
}

canvas {
    display: block;
    margin-top: 4px;
    cursor: crosshair;
    border-radius: 4px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.18);
}

/* ── コントロール行 ── */
.controls, body > p, body > label, body > br ~ label {
    font-size: 13px;
    color: #444;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: #c8d0e0;
    outline: none;
    cursor: pointer;
    vertical-align: middle;
    margin: 0 4px;
    width: 120px;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #3b6bda;
    cursor: pointer;
    box-shadow: 0 0 0 2px #fff, 0 0 0 3px #3b6bda44;
    transition: background 0.15s;
}
input[type="range"]::-webkit-slider-thumb:hover {
    background: #2550b8;
}

output {
    display: inline-block;
    min-width: 26px;
    text-align: right;
    font-variant-numeric: tabular-nums;
    color: #333;
    font-size: 13px;
}

input[type="checkbox"] {
    accent-color: #3b6bda;
    margin-right: 4px;
    vertical-align: middle;
}

/* ── 印刷用（白背景）ボタン ── */
.hc-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin: 5px 0;
    padding: 4px 14px;
    font-size: 12px;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid #bfc7d4;
    border-radius: 6px;
    background: #ffffff;
    color: #444;
    user-select: none;
    transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.hc-btn::before {
    content: "🖨";
    font-size: 13px;
}

.hc-btn:hover {
    background: #f0f4ff;
    border-color: #8aabf5;
    box-shadow: 0 2px 6px rgba(59,107,218,0.12);
}

.hc-btn.hc-active {
    background: #ebf0ff;
    border-color: #3b6bda;
    color: #1d3ea8;
    font-weight: 600;
    box-shadow: 0 0 0 2px #3b6bda33;
}

.hc-btn.hc-active::before {
    content: "✓";
}

/* ── 印刷時: UIを非表示・キャンバスのみ表示 ── */
@media print {
    body {
        background: white !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    h2           { display: none !important; }
    input        { display: none !important; }
    output       { display: none !important; }
    .hc-btn      { display: none !important; }
    canvas {
        box-shadow: none !important;
        border-radius: 0 !important;
        margin: 0 !important;
        width: 100% !important;
    }
}