* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #1f2937; background: #f6f7fb; line-height: 1.7; }
.topnav { background: #fff; border-bottom: 1px solid #e5e7eb; padding: 10px 20px; font-size: 0.875rem; }
.topnav a { color: #6b7280; text-decoration: none; }
.topnav a:hover { color: #1f2937; text-decoration: none; }
.container { max-width: 720px; margin: 0 auto; padding: 40px 20px 80px; }
h1 { font-size: 1.5rem; font-weight: 700; line-height: 1.4; margin: 0 0 4px; }
.subtitle { font-size: 0.95rem; color: #6b7280; margin: 0 0 1.5em; }
h2 { font-size: 1.15rem; font-weight: 700; margin: 2.2em 0 0.5em; padding: 8px 12px; background: #eef2ff; border-left: 3px solid #6366f1; border-radius: 0 4px 4px 0; position: sticky; top: 0; z-index: 10; }
h3 { font-size: 1rem; font-weight: 600; margin: 1.5em 0 0.4em; color: #374151; background: #f0f4ff; border-left: 2px solid #a5b4fc; padding: 4px 10px; border-radius: 0 3px 3px 0; }
h4, h5, h6 { font-size: 1rem; font-weight: 600; margin: 1.5em 0 0.4em; color: #374151; border-left: 2px solid #c7d2fe; padding: 2px 8px; }
p { margin: 0.5em 0 0.8em; }
.container img { display: block; width: auto; max-width: min(100%, 640px); max-height: min(720px, 78vh); height: auto; margin: 0.8em auto 1em; }
ul, ol { margin: 0.4em 0 0.8em; padding-left: 1.6em; }
li { margin: 0.3em 0; }
code { font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: 0.88em; background: #e5e7eb; padding: 1px 5px; border-radius: 4px; }
pre { background: #1f2937; color: #f3f4f6; padding: 14px 16px; border-radius: 8px; overflow-x: auto; margin: 0.6em 0 1em; }
pre code { background: none; padding: 0; font-size: 0.875rem; color: inherit; }
.code-block { margin: 0.6em 0 1em; }
.code-block pre { margin: 0; border-radius: 0 0 8px 8px; }
.code-header { display: flex; justify-content: space-between; align-items: center; padding: 5px 12px; border-radius: 8px 8px 0 0; }
.code-header.header-terminal { background: #111827; }
.code-header.header-bash { background: #374151; }
.code-header.header-claude { background: #3b0764; }
.code-header.header-default { background: #374151; }
.code-label { color: #d1d5db; font-size: 0.62rem; font-weight: 600; letter-spacing: 0.06em; }
.copy-area { display: flex; align-items: center; gap: 6px; }
.copy-toast { color: #6ee7b7; font-size: 0.62rem; opacity: 0; transition: opacity 0.15s; pointer-events: none; }
.copy-toast.show { opacity: 1; }
.copy-btn { background: transparent; border: none; color: #6b7280; padding: 2px 2px; border-radius: 4px; cursor: pointer; display: flex; align-items: center; }
.copy-btn:hover { color: #d1d5db; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }
blockquote { background: #fff; border-left: 3px solid #d1d5db; padding: 10px 14px; border-radius: 0 6px 6px 0; margin: 0.8em 0; color: #4b5563; font-size: 0.93em; }
blockquote p { margin: 0; }
hr { border: none; border-top: 1px solid #e5e7eb; margin: 2em 0 0; }
hr + p { font-size: 0.875rem; color: #6b7280; margin-top: 0.5em; }
table { border-collapse: collapse; width: 100%; margin: 0.6em 0 1em; }
th, td { border: 1px solid #e5e7eb; padding: 8px 12px; text-align: left; }
th { background: #f3f4f6; font-weight: 600; }
.warning { background: #fef3c7; border-left: 4px solid #f59e0b; padding: 12px 16px; border-radius: 0 6px 6px 0; margin: 1em 0; }
.caption { font-size: 0.82rem; color: #6b7280; text-align: center; margin: -0.5em auto 1em; }
.toc { background: #eef2ff; border-radius: 8px; padding: 12px 18px; margin: 1.5em 0 2em; font-size: 0.82rem; line-height: 1.5; }
.toc ul { margin: 0.15em 0; padding-left: 1.3em; }
.toc > ul { padding-left: 0; list-style: none; }
.toc li { margin: 0.15em 0; }
.toc a { color: #4b5563; }
.toc a:hover { color: #1f2937; text-decoration: underline; }