:root{--bg:#ECEAE2;--surface:#FAF9F5;--surface-2:#F1EFE8;--ink:#1B1F2A;--muted:#5F6473;--line:#D3D0C5;--line-strong:#B9B5A8;--lapis:#1E4B9B;--lapis-ink:#163B7B;--lapis-soft:#E1E8F6;--gold:#A8801F;--gold-soft:#F1E7CB;--shadow:0 1px 2px rgba(27,31,42,.06),0 8px 24px rgba(27,31,42,.06);--serif:"Amiri","Iowan Old Style","Palatino Linotype",Georgia,serif;--sans:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;--mono:"IBM Plex Mono","SFMono-Regular",Menlo,Consolas,monospace}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#13161E;--surface:#1B1F29;--surface-2:#222734;--ink:#E9E7E0;--muted:#A3A7B2;--line:#313746;--line-strong:#454C5E;--lapis:#86A9F0;--lapis-ink:#A9C2F5;--lapis-soft:#23304A;--gold:#D8B45C;--gold-soft:#3A3220;--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35)}}
:root[data-theme="dark"]{--bg:#13161E;--surface:#1B1F29;--surface-2:#222734;--ink:#E9E7E0;--muted:#A3A7B2;--line:#313746;--line-strong:#454C5E;--lapis:#86A9F0;--lapis-ink:#A9C2F5;--lapis-soft:#23304A;--gold:#D8B45C;--gold-soft:#3A3220;--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35)}
*{box-sizing:border-box}html{color-scheme:light dark}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.55;padding-inline:16px;padding-block:0 48px;-webkit-font-smoothing:antialiased}
a{color:var(--lapis)}:focus-visible{outline:2px solid var(--lapis);outline-offset:2px}
.wrap{max-width:860px;margin:0 auto}
.crumbs{font-size:13px;color:var(--muted);padding-top:14px}.crumbs a{text-decoration:none}.crumbs a:hover{text-decoration:underline}.crumbs span{margin:0 6px}
.top{padding-block:26px 18px;border-bottom:1px solid var(--line)}
.top h1{margin:0;font-family:var(--serif);font-weight:400;font-size:40px;line-height:1.1;text-wrap:balance}
.top .sub{display:block;font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:8px}
.lede{max-width:62ch;color:var(--muted);margin:18px 0 8px}
.subjects{list-style:none;margin:22px 0 0;padding:0;display:flex;flex-direction:column;gap:14px}
.subject{background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);padding:20px 24px}
.subject h2{margin:0 0 4px;font-family:var(--serif);font-weight:400;font-size:26px;line-height:1.2}
.subject h2 a{color:inherit;text-decoration:none}.subject h2 a:hover{color:var(--lapis)}
.subject .k{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.chapters{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.chapter{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:baseline;padding:12px 14px;border:1px solid var(--line);border-radius:9px;background:var(--surface-2);text-decoration:none;color:var(--ink)}
.chapter:hover{border-color:var(--lapis);background:var(--surface)}
.chapter .num{font-family:var(--serif);font-size:26px;line-height:1;color:var(--lapis);font-weight:700;min-width:1.2em}
.chapter .t{font-family:var(--serif);font-size:19px;line-height:1.3}
.chapter .d{display:block;font-family:var(--sans);font-size:13px;color:var(--muted);margin-top:2px}
.chapter .go{font-family:var(--mono);font-size:12px;color:var(--lapis);white-space:nowrap}
.soon{font-size:13px;color:var(--muted);margin-top:10px}
footer{margin-top:40px;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
@media (max-width:520px){.top h1{font-size:32px}.chapter{grid-template-columns:auto 1fr}.chapter .go{grid-column:2}}