/* ------ Three.js Git 図解 共通スタイル ------ */

/* --- canvas コンテナ --- */
.git-diagram-canvas-wrapper {
    position: relative;
    width: 100%;
    max-width: 560px;
    margin: 0 auto;
    aspect-ratio: 720 / 400;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.git-diagram-canvas-wrapper[data-diagram="commit-graph"] {
    aspect-ratio: 720 / 400;
}

.git-diagram-canvas-wrapper[data-diagram="branch-pointer"] {
    aspect-ratio: 720 / 620;
}

.git-diagram-canvas-wrapper[data-diagram="merge"] {
    aspect-ratio: 720 / 700;
}

.git-diagram-canvas-wrapper canvas {
    display: block;
    width: 100%;
    height: 100%;
    touch-action: pan-y;
}

/* --- コントロールボタン --- */
.git-diagram-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.git-diagram-btn {
    padding: 8px 16px;
    border: 1px solid var(--color-accent);
    background: rgba(96, 165, 250, 0.1);
    color: var(--color-accent);
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: 0.85rem;
    transition: background 0.2s ease, color 0.2s ease;
}

.git-diagram-btn:hover {
    background: var(--color-accent);
    color: var(--color-bg-dark);
}

.git-diagram-btn:disabled {
    opacity: 0.4;
    cursor: default;
    background: rgba(96, 165, 250, 0.1);
    color: var(--color-accent);
}

/* --- フォールバック SVG --- */
.git-diagram-fallback {
    max-width: 100%;
    height: auto;
}

.git-diagram-fallback.is-hidden {
    display: none;
}

/* --- レスポンシブ --- */
@media (max-width: 640px) {
    .git-diagram-canvas-wrapper {
        aspect-ratio: 720 / 320;
    }

    .git-diagram-canvas-wrapper[data-diagram="commit-graph"] {
        aspect-ratio: 720 / 260;
    }

    .git-diagram-canvas-wrapper[data-diagram="branch-pointer"] {
        aspect-ratio: 720 / 620;
    }

    .git-diagram-canvas-wrapper[data-diagram="merge"] {
        aspect-ratio: 720 / 700;
    }

    .git-diagram-btn {
        padding: 10px 14px;
        font-size: 0.9rem;
    }
}