/* 15 themes, switched via <html data-theme="...">, saved in localStorage. Default is apple. */
html[data-theme="apple"]{--bg:#f5f5f7;--text:#1d1d1f;--muted:#6e6e73;--card:#ffffff;--border:#d2d2d7;--accent:#0071e3;--btn-bg:#ffffff;--btn-text:#1d1d1f;--btn-primary-bg:#0071e3;--btn-primary-text:#ffffff;--radius:18px}
html[data-theme="apple"] body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","PingFang SC","Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}
html[data-theme="apple"] .top{background:rgba(251,251,253,.8);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.08)}
html[data-theme="apple"] .hero h1{font-size:48px;font-weight:700;letter-spacing:-.02em;line-height:1.1}
html[data-theme="apple"] .card,html[data-theme="apple"] .post-item,html[data-theme="apple"] .article{box-shadow:0 4px 24px rgba(0,0,0,.06);border-color:transparent}
html[data-theme="apple"] .btn{border-radius:999px;padding:8px 16px}
html[data-theme="apple"] .btn.primary{background:#0071e3}
html[data-theme="minecraft"]{--bg:#e8f5d0;--text:#1a1a1a;--muted:#4a5d23;--card:#fffbe8;--border:#7a5c2e;--accent:#2e7d32;--btn-bg:#c8e6a0;--btn-text:#1a1a1a;--btn-primary-bg:#5b8c2a;--btn-primary-text:#fff;--radius:0px}
html[data-theme="minecraft"] .card,html[data-theme="minecraft"] .post-item,html[data-theme="minecraft"] .article{box-shadow:4px 4px 0 #7a5c2e;border-width:3px}
html[data-theme="minecraft"] body{font-family:ui-monospace,"PingFang SC","Microsoft YaHei",monospace}
html[data-theme="scifi"]{--bg:#050816;--text:#d7f6ff;--muted:#7dd3fc;--card:#0b1226;--border:#164e63;--accent:#22d3ee;--btn-bg:#0b1226;--btn-text:#d7f6ff;--btn-primary-bg:#0891b2;--btn-primary-text:#fff;--code-bg:#020617;--code-text:#67e8f9}
html[data-theme="scifi"] body{background-image:linear-gradient(rgba(34,211,238,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(34,211,238,.06) 1px,transparent 1px);background-size:32px 32px}
html[data-theme="ai"]{--bg:#eef2ff;--text:#1e1b4b;--muted:#6366f1;--card:rgba(255,255,255,.85);--border:#c7d2fe;--accent:#7c3aed;--btn-bg:#fff;--btn-text:#312e81;--btn-primary-bg:linear-gradient(135deg,#7c3aed,#2563eb);--btn-primary-text:#fff}
html[data-theme="ai"] .card,html[data-theme="ai"] .post-item{backdrop-filter:blur(6px)}
html[data-theme="hacker"]{--bg:#000;--text:#00ff41;--muted:#00c853;--card:#050505;--border:#00ff41;--accent:#00ff41;--btn-bg:#000;--btn-text:#00ff41;--btn-primary-bg:#00ff41;--btn-primary-text:#000;--code-bg:#000;--code-text:#00ff41}
html[data-theme="hacker"] body{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
html[data-theme="sketch"]{--bg:#fdfbf7;--text:#222;--muted:#666;--card:#fffdf5;--border:#222;--accent:#111;--btn-bg:#fff;--btn-text:#111;--btn-primary-bg:#111;--btn-primary-text:#fff}
html[data-theme="sketch"] .card,html[data-theme="sketch"] .post-item,html[data-theme="sketch"] .article{border-style:dashed;border-width:2px;border-radius:6px}
html[data-theme="diary"]{--bg:#fef3c7;--text:#44403c;--muted:#78716c;--card:#fffbeb;--border:#d6c79a;--accent:#b45309;--btn-bg:#fffbeb;--btn-text:#44403c;--btn-primary-bg:#92400e;--btn-primary-text:#fff}
html[data-theme="diary"] body{font-family:Georgia,"Songti SC",serif;background-image:repeating-linear-gradient(transparent,transparent 31px,rgba(180,83,9,.12) 32px)}
html[data-theme="forest"]{--bg:#ecfdf5;--text:#14532d;--muted:#15803d;--card:#fff;--border:#a7f3d0;--accent:#15803d;--btn-primary-bg:#166534;--btn-primary-text:#fff}
html[data-theme="ocean"]{--bg:#eff6ff;--text:#0c4a6e;--muted:#0284c7;--card:#fff;--border:#bae6fd;--accent:#0284c7;--btn-primary-bg:#0369a1;--btn-primary-text:#fff}
html[data-theme="sunset"]{--bg:#fff7ed;--text:#431407;--muted:#ea580c;--card:#fff;--border:#fed7aa;--accent:#ea580c;--btn-primary-bg:#ea580c;--btn-primary-text:#fff}
html[data-theme="night"]{--bg:#0f172a;--text:#e2e8f0;--muted:#94a3b8;--card:#1e293b;--border:#334155;--accent:#38bdf8;--btn-bg:#1e293b;--btn-text:#e2e8f0;--btn-primary-bg:#38bdf8;--btn-primary-text:#0f172a;--code-bg:#020617;--code-text:#e2e8f0}
html[data-theme="magazine"]{--bg:#fff;--text:#111;--muted:#555;--card:#fff;--border:#111;--accent:#dc2626;--btn-primary-bg:#111;--btn-primary-text:#fff;--radius:0px}
html[data-theme="magazine"] h1,html[data-theme="magazine"] h2{font-family:Georgia,serif;letter-spacing:-.02em}
html[data-theme="sakura"]{--bg:#fff1f2;--text:#500724;--muted:#be185d;--card:#fff;--border:#fecdd3;--accent:#e11d48;--btn-primary-bg:#e11d48;--btn-primary-text:#fff;--radius:20px}
html[data-theme="candy"]{--bg:#fdf4ff;--text:#3b0764;--muted:#a855f7;--card:#fff;--border:#f5d0fe;--accent:#d946ef;--btn-primary-bg:#c026d3;--btn-primary-text:#fff;--radius:24px}
html[data-theme="minimal"]{--bg:#fafafa;--text:#111;--muted:#666;--card:#fff;--border:#e5e5e5;--accent:#111;--btn-primary-bg:#111;--btn-primary-text:#fff}