/* 共通スタイル */
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* スクロールバー - ミニマル */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: #e4e4e7; /* zinc-200 */
    border-radius: 3px;
}
.dark ::-webkit-scrollbar-thumb {
    background: #27272a; /* zinc-800 */
}
::-webkit-scrollbar-thumb:hover { background: #d4d4d8; /* zinc-300 */ }
.dark ::-webkit-scrollbar-thumb:hover { background: #3f3f46; /* zinc-700 */ }

/* Markdown スタイル - 枠線なしで美しいタイポグラフィに依存 */
.markdown-body {
    color: #52525b; /* zinc-600 */
    line-height: 1.8;
    font-size: 1.125rem;
}
.dark .markdown-body { color: #a1a1aa; /* zinc-400 */ }

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
    color: #09090b; /* zinc-950 */
    font-weight: 800;
    margin-bottom: 1.5rem;
    margin-top: 3rem;
    letter-spacing: -0.025em;
}
.dark .markdown-body h1, .dark .markdown-body h2, .dark .markdown-body h3 {
    color: #fafafa; /* zinc-50 */
}
.markdown-body h1 { font-size: 2.5rem; }
.markdown-body h2 { font-size: 2rem; }
.markdown-body h3 { font-size: 1.5rem; }
.markdown-body p { margin-bottom: 1.5rem; }

.markdown-body a { 
    color: #09090b; 
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
    text-decoration-color: #d4d4d8;
    transition: all 0.2s; 
    font-weight: 600;
}
.dark .markdown-body a {
    color: #fafafa;
    text-decoration-color: #3f3f46;
}
.markdown-body a:hover { 
    text-decoration-color: #09090b;
}
.dark .markdown-body a:hover {
    text-decoration-color: #fafafa;
}

.markdown-body code {
    background-color: #f4f4f5; /* zinc-100 */
    padding: 0.25rem 0.5rem;
    border-radius: 0.5rem;
    font-size: 0.875em;
    color: #18181b; /* zinc-900 */
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-weight: 600;
}
.dark .markdown-body code {
    background-color: #18181b; /* zinc-900 */
    color: #f4f4f5; /* zinc-100 */
}

.markdown-body pre {
    background-color: #fafafa; /* zinc-50 */
    padding: 2rem;
    border-radius: 1.5rem;
    overflow-x: auto;
    margin: 2rem 0;
}
.dark .markdown-body pre {
    background-color: #09090b; /* zinc-950 */
}
.markdown-body pre code {
    background-color: transparent;
    padding: 0;
    color: inherit;
    font-weight: 400;
}

.markdown-body ul, .markdown-body ol {
    padding-left: 1.5rem;
    margin-bottom: 2rem;
}
.markdown-body ul { list-style-type: disc; }
.markdown-body ol { list-style-type: decimal; }
.markdown-body li { margin-bottom: 0.75rem; }

.markdown-body blockquote {
    border-left: 4px solid #09090b; /* zinc-950 */
    padding: 1rem 0 1rem 1.5rem;
    margin: 2rem 0;
    font-style: italic;
    color: #71717a; /* zinc-500 */
}
.dark .markdown-body blockquote {
    border-left-color: #fafafa; /* zinc-50 */
    color: #a1a1aa; /* zinc-400 */
}
.markdown-body strong {
    color: #09090b;
    font-weight: 800;
}
.dark .markdown-body strong { color: #fafafa; }

/* トースト通知 - ミニマル */
.toast {
    background-color: #18181b; /* zinc-900 */
    color: #fafafa; /* zinc-50 */
    padding: 1rem 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    display: flex;
    align-items: center;
    gap: 1rem;
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: auto;
    font-weight: 600;
}
.dark .toast {
    background-color: #ffffff; /* white */
    color: #09090b; /* zinc-950 */
}
.toast.show {
    transform: translateY(0);
    opacity: 1;
}

/* カスタムアニメーション */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
/* Favorite Button Active State */
.fav-btn.active svg {
    fill: currentColor;
}