:root{--bg:#fbfaf7;--fg:#1c1c21;--muted:#6b6b75;--line:#e4e2dc;--tile:#fff;--accent:#5b4bdb;--rail-w:68px;--rail-w-open:248px;--serif:Georgia, "Times New Roman", serif;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#141418;--fg:#ececf1;--muted:#9a9aa6;--line:#2c2c34;--tile:#1d1d23;--accent:#9d92ff;color-scheme:dark}}:root[data-theme=dark]{--bg:#141418;--fg:#ececf1;--muted:#9a9aa6;--line:#2c2c34;--tile:#1d1d23;--accent:#9d92ff;color-scheme:dark}*,:before,:after{box-sizing:border-box}html{background:var(--bg)}body{background:var(--bg);min-height:100vh;color:var(--fg);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.6}a{color:var(--accent)}.page{min-height:100vh;padding:48px 32px 0 calc(var(--rail-w) + 32px);flex-direction:column;display:flex}.page>main{flex:1}.site-footer{border-top:1px solid var(--line);color:var(--muted);text-align:center;margin-top:48px;padding:18px 0;font-size:.85rem}.page h1{margin:0 0 16px;font-size:2rem;line-height:1.2}.home{place-items:center;display:grid}.home h1{letter-spacing:.02em;text-align:center;margin:0;font-size:clamp(2.5rem,8vw,5rem)}.rail{--r-bg:#16161b;--r-fg:#a4a4b0;--r-fg-hi:#fff;--r-active:#26262e;--r-line:#34343e;z-index:50;width:var(--rail-w);background:var(--r-bg);color:var(--r-fg);flex-direction:column;justify-content:space-between;padding:24px 4px 16px;transition:width .22s;display:flex;position:fixed;inset:0 auto 0 0;overflow:hidden}.rail ul{flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;display:flex}.rail a{height:54px;color:var(--r-fg);white-space:nowrap;border-radius:12px;align-items:center;gap:16px;padding:0 18px;text-decoration:none;display:flex}.rail a:hover,.rail a:focus-visible,.rail a[aria-current=page]{color:var(--r-fg-hi);background:var(--r-active)}.rail a:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.rail svg{fill:none;stroke:currentColor;stroke-width:1.7px;stroke-linecap:round;stroke-linejoin:round;flex:none;width:24px;height:24px}.rail .label{opacity:0;transition:opacity .15s}.rail .sub-wrap{grid-template-rows:0fr;transition:grid-template-rows .22s;display:grid}.rail .sub{gap:2px;min-height:0;position:relative;overflow:hidden}.rail .sub:before{content:"";background:var(--r-line);border-radius:1px;width:2px;position:absolute;top:8px;bottom:6px;left:29px}.rail .sub li:first-child{margin-top:4px}.rail .sub a{gap:12px;height:42px;margin-left:34px;padding:0 8px;font-size:.92rem}.rail .sub svg{width:20px;height:20px;margin:0 2px}.rail li.open>a:not([aria-current=page]){color:var(--r-fg-hi)}@media (hover:hover) and (width>=761px){.rail:hover,.rail:focus-within{width:var(--rail-w-open)}.rail:hover .label,.rail:focus-within .label{opacity:1;transition-delay:80ms}.rail li.has-sub:hover>.sub-wrap,.rail li.has-sub:focus-within>.sub-wrap,.rail:hover li.has-sub.open>.sub-wrap,.rail:focus-within li.has-sub.open>.sub-wrap{grid-template-rows:1fr}}.menu-btn,.backdrop{display:none}@media (width<=760px),(hover:none){.page{padding:72px 16px 0}.menu-btn{z-index:40;border:1px solid var(--line);background:var(--tile);width:44px;height:44px;color:var(--fg);cursor:pointer;border-radius:10px;place-items:center;display:grid;position:fixed;top:12px;left:16px}.menu-btn svg{fill:none;stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;width:22px;height:22px}.rail{width:var(--rail-w-open);transition:transform .22s;transform:translate(-100%)}.rail.drawer-open{transform:none}.rail .label{opacity:1}.rail .sub-wrap{grid-template-rows:1fr}.backdrop{z-index:45;background:#00000080;display:block;position:fixed;inset:0}.backdrop[hidden]{display:none}}#loader{z-index:100;pointer-events:none;display:none;position:fixed;inset:0}html.loading #loader{pointer-events:auto;display:block}#loader .panel{background:var(--bg);width:50.2%;transition:transform .9s cubic-bezier(.7,0,.2,1);position:absolute;top:0;bottom:0}#loader .panel-l{border-right:1px solid var(--line);left:0}#loader .panel-r{border-left:1px solid var(--line);right:0}html.loading .page,html.loading .rail,html.loading .menu-btn{opacity:0}html.loading .page{transform:scale(.97)}html.loading.open .page,html.loading.open .rail,html.loading.open .menu-btn{opacity:1;transition:opacity .9s}html.loading.open .page{transition:opacity .9s,transform .9s;transform:none}html.loading.open .panel-l{transform:translate(-100%)}html.loading.open .panel-r{transform:translate(100%)}@media (prefers-reduced-motion:reduce){#loader .panel{transition:none}html.loading.open .panel-l,html.loading.open .panel-r{transform:none}#loader{transition:opacity .6s}html.loading.open #loader{opacity:0}html.loading .page{transform:none}}.settings{width:100%;max-width:760px;margin:0 auto}.section-title{margin:24px 0 4px;font-size:1.1rem}.theme-tiles{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:8px 0 32px;display:grid}.theme-tile{border:1px solid var(--line);background:var(--tile);color:var(--fg);font:inherit;cursor:pointer;border-radius:12px;flex-direction:column;align-items:center;gap:10px;padding:18px 8px;display:flex}.theme-tile svg{fill:none;stroke:currentColor;stroke-width:1.7px;stroke-linecap:round;stroke-linejoin:round;width:28px;height:28px}.theme-tile[aria-pressed=true]{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent);color:var(--accent)}.theme-tile:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.help h2{margin:0 0 8px;font-size:1.1rem}.help ul{margin:0;padding-left:1.4em}.help li{margin-bottom:10px}@media (width<=760px){.theme-tiles{gap:8px}.theme-tile{text-align:center;padding:14px 4px;font-size:.85rem}}.calc-page{width:100%;max-width:760px;margin:0 auto}.calc-page .lead{color:var(--muted);margin:0 0 24px}.calc-form{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:28px;display:grid}.field{flex-direction:column;gap:6px;display:flex}.field-label{color:var(--muted);font-size:.85rem;font-weight:600}.pair{grid-template-columns:1fr 1fr;gap:8px;display:grid}.calc-page select{border:1px solid var(--line);background:var(--tile);width:100%;min-height:44px;color:var(--fg);font:inherit;border-radius:10px;padding:8px 12px}.calc-page select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.note-row{flex-wrap:wrap;gap:10px;display:flex}.note-chip{border:1px solid var(--line);background:var(--tile);border-radius:12px;flex-direction:column;align-items:center;min-width:64px;padding:10px 14px;display:flex}.note-name{font-family:var(--serif);font-size:1.6rem;line-height:1.2}.note-interval{color:var(--muted);font-size:.75rem}.summary{color:var(--muted);margin:20px 0 0}@media (width<=760px){.note-chip{min-width:56px;padding:8px 10px}}