:root{--bg:#F7F5EF;--surface:#FFFFFF;--line:#E4E0D4;--navy:#1F3A5F;--on-navy:#F7F5EF;--gold:#C9A24B;--text:#2B2F36;--muted:#6A707B;--sage:#6B9E7F;--tint:#EEF1F5;--danger:#A94442;--link:#1F3A5F}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#161B26;--surface:#1E2533;--line:#2D3547;--navy:#27456E;--on-navy:#E6E6E0;--gold:#D4B063;--text:#E6E6E0;--muted:#9AA1AE;--sage:#7FB293;--tint:#222B3C;--danger:#D9827F;--link:#D4B063}}
:root[data-theme="dark"]{--bg:#161B26;--surface:#1E2533;--line:#2D3547;--navy:#27456E;--on-navy:#E6E6E0;--gold:#D4B063;--text:#E6E6E0;--muted:#9AA1AE;--sage:#7FB293;--tint:#222B3C;--danger:#D9827F;--link:#D4B063}
*{box-sizing:border-box;margin:0}
html{height:100%}
body{background:var(--bg);color:var(--text);font:400 16px/1.5 Figtree,system-ui,sans-serif;min-height:100%;padding-bottom:calc(76px + env(safe-area-inset-bottom,0px))}
body.plain{padding-bottom:calc(24px + env(safe-area-inset-bottom,0px))}
.app{max-width:480px;margin:0 auto}
h1,h2,h3{font-family:Newsreader,Georgia,serif;font-weight:600;line-height:1.25}
.top{position:sticky;top:0;z-index:5;background:var(--navy);color:var(--on-navy);padding:calc(10px + env(safe-area-inset-top,0px)) 16px 10px;display:flex;align-items:center;gap:10px}
.top h1{font-size:21px;flex:1}
.ib{width:40px;height:40px;border-radius:50%;border:0;background:rgba(255,255,255,.12);color:inherit;display:grid;place-items:center;cursor:pointer}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.hidden{display:none!important}
main{padding:14px 16px}
.btn{display:inline-block;background:var(--navy);color:var(--on-navy);border:0;font:inherit;font-weight:600;font-size:15px;padding:12px 20px;border-radius:10px;cursor:pointer;text-align:center}
.btn:disabled{opacity:.6;cursor:wait}
.btn.ghost{background:transparent;color:var(--danger);border:1px solid var(--line)}
label.f{display:block;font-size:14px;font-weight:600;margin:14px 0 6px}
.in{width:100%;font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px}
textarea.in{min-height:240px;resize:vertical;line-height:1.6}
.row{display:flex;gap:10px}.row>div{flex:1;min-width:0}
.msg{font-size:14px;margin-top:10px;min-height:20px}
.msg.err{color:var(--danger)}.msg.ok{color:var(--sage)}
/* auth */
.brand{background:var(--navy);color:var(--on-navy);padding:calc(28px + env(safe-area-inset-top,0px)) 20px 26px}
.brand .logo{font-family:Newsreader,Georgia,serif;font-size:30px;font-weight:600}
.brand .logo b{color:var(--gold);font-weight:600}
.brand p{margin-top:6px;opacity:.9}
.tabs{display:flex;border-bottom:1px solid var(--line);margin-bottom:6px}
.tabs button{flex:1;background:none;border:0;border-bottom:3px solid transparent;font:inherit;font-weight:600;color:var(--muted);padding:14px 0;cursor:pointer}
.tabs button[aria-selected="true"]{color:var(--text);border-bottom-color:var(--gold)}
.auth .btn{width:100%;margin-top:20px}
/* notes */
.tools{background:var(--navy);padding:4px 16px 16px}
.search{display:flex;align-items:center;gap:10px;background:var(--surface);color:var(--muted);border-radius:12px;padding:0 14px}
.search input{flex:1;border:0;background:transparent;color:var(--text);font:inherit;padding:13px 0;min-width:0}
.search input:focus-visible{outline:none}
.search:focus-within{outline:2px solid var(--gold)}
.chips{display:flex;gap:8px;overflow-x:auto;padding:12px 16px 2px;scrollbar-width:none}
.chip{flex:none;border:1px solid var(--line);background:var(--surface);color:var(--text);font:inherit;font-size:14px;padding:7px 14px;border-radius:999px;cursor:pointer}
.chip[aria-pressed="true"]{background:var(--navy);color:var(--on-navy);border-color:var(--navy)}
.count{font-size:14px;color:var(--muted);margin-bottom:10px}
.note{display:block;width:100%;text-align:left;font:inherit;color:inherit;background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:6px 12px 12px 6px;padding:14px 16px;margin-bottom:10px;cursor:pointer}
.note h3{font-size:18px;margin-bottom:2px}
.note .meta{font-size:13px;color:var(--muted)}
.note p{font-size:15px;margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty{text-align:center;padding:40px 16px;color:var(--muted)}
.empty h3{color:var(--text);margin-bottom:6px}
.fab{position:fixed;right:max(16px,calc(50% - 224px));bottom:calc(88px + env(safe-area-inset-bottom,0px));width:56px;height:56px;border-radius:50%;border:0;background:var(--gold);color:#1F2430;display:grid;place-items:center;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.fab svg{width:26px;height:26px}
.actions{display:flex;gap:10px;margin-top:18px}
.actions .btn:first-child{flex:1}
.nav{position:fixed;left:0;right:0;bottom:0;background:var(--surface);border-top:1px solid var(--line);display:flex;justify-content:center;padding-bottom:env(safe-area-inset-bottom,0px)}
.nav div{display:flex;width:100%;max-width:480px}
.nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:9px 0 8px;font-size:12px;color:var(--muted);text-decoration:none}
.nav a[aria-current]{color:var(--link);font-weight:600}
/* home */
.hero{background:var(--navy);color:var(--on-navy);padding:6px 16px 24px}
.hero h1{font-size:26px}
.hero .sub{opacity:.85;font-size:14px;margin:2px 0 14px}
section{margin-top:24px}
.sh{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:10px}
.sh h2{font-size:19px}
.sh a{color:var(--link);font-size:14px;font-weight:600;text-decoration:none}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tile{display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;color:var(--text);min-height:92px}
.tile svg{color:var(--link)}
.tile strong{font-weight:600;font-size:15px}
.tile span{font-size:13px;color:var(--muted);line-height:1.3}
.tile.soon{background:transparent;border-style:dashed}
.tile.soon svg,.tile.soon strong{opacity:.55}
.tile.wide{grid-column:span 2}
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:4px 16px}
.card .note{border:0;border-left:0;border-radius:0;border-bottom:1px solid var(--line);padding:12px 0;margin:0;background:transparent;text-decoration:none;display:block;color:inherit}
.card .note:last-child{border-bottom:0}
.card .empty{padding:22px 8px}
.card .empty .btn{margin-top:12px;text-decoration:none}
/* community */
.note.tip{border-left-color:var(--sage)}
.note .foot{font-size:13px;color:var(--muted);margin-top:8px}
.pill{display:inline-block;font-size:12px;font-weight:600;padding:2px 9px;border-radius:999px;background:var(--tint);color:var(--link);margin-right:6px}
.pill.tip{color:var(--sage)}
.thread{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px}
.thread h2{font-size:21px;margin:8px 0}
.thread .body{white-space:pre-wrap;overflow-wrap:anywhere}
.by{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.av{flex:none;width:34px;height:34px;border-radius:50%;background:var(--tint);color:var(--link);display:grid;place-items:center;font-weight:600;font-size:12px}
.by small{color:var(--muted);font-size:13px;display:block;line-height:1.2}
.by b{font-weight:600;font-size:15px;line-height:1.2;display:block}
.reply{padding:14px 0;border-bottom:1px solid var(--line)}
.reply .body{white-space:pre-wrap;overflow-wrap:anywhere;margin-left:44px}
.reply .x{margin:6px 0 0 44px;background:none;border:0;color:var(--danger);font:inherit;font-size:13px;cursor:pointer;padding:0}
.rbox textarea.in{min-height:90px}
/* courses */
.gh{font-family:Newsreader,Georgia,serif;font-size:19px;font-weight:600;margin:22px 0 8px;display:flex;justify-content:space-between;align-items:baseline}
.gh small{font:400 13px Figtree,system-ui,sans-serif;color:var(--muted)}
.crow{display:block;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:13px 16px;margin-bottom:8px;text-decoration:none;color:var(--text)}
.crow strong{display:block;font-weight:600;font-size:16px;line-height:1.3}
.crow .m{display:block;font-size:13px;color:var(--muted);margin-top:3px}
.crow .hit{display:block;font-size:13px;color:var(--link);margin-top:3px}
.legend{font-size:13px;color:var(--muted);margin:18px 0 6px}
.cinfo{margin:2px 0 6px}
.cinfo .pill{margin-bottom:6px}
.also{font-size:14px;color:var(--muted);margin-top:4px}
.topics{list-style:none;padding:0;margin:10px 0 0}
.topic{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-bottom:8px;overflow:hidden}
.topic>button{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;font:inherit;color:var(--text);background:none;border:0;padding:13px 16px;cursor:pointer}
.topic .n{flex:none;width:24px;height:24px;border-radius:50%;background:var(--tint);color:var(--link);display:grid;place-items:center;font-size:12px;font-weight:600;margin-top:1px}
.topic .t{flex:1;line-height:1.4}
.topic .body{padding:0 16px 14px 52px;font-size:14px;color:var(--muted)}
.topic .body a{color:var(--link);font-weight:600}
.soonbox{text-align:center;color:var(--muted);padding:30px 16px}
.soonbox h3{color:var(--text);margin-bottom:6px}
/* library notes */
.rich p{margin:0 0 12px}.rich ul{margin:0 0 12px;padding-left:22px}.rich li{margin-bottom:6px}
a.auth{color:var(--link);font-weight:600;text-decoration:underline;text-decoration-color:var(--gold);text-decoration-thickness:2px;text-underline-offset:3px}
.cit{font-size:13px;color:var(--muted)}
.nsec{margin-top:22px}.nsec h2{font-size:20px;margin-bottom:8px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.adm{background:var(--tint);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:6px 12px 12px 6px;padding:14px 16px;margin:12px 0}
.adm h3{font-size:16px;margin-bottom:6px}
.btns{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.btns .btn{padding:9px 14px;font-size:14px}
.btn.alt{background:transparent;color:var(--link);border:1px solid var(--line)}
.prog{height:8px;border-radius:4px;background:var(--line);overflow:hidden;margin-top:10px}
.prog i{display:block;height:100%;background:var(--sage);width:0;transition:width .3s}
.nsec textarea.in{min-height:200px}
.kv{margin-top:18px}.kv h2{font-size:18px;margin-bottom:4px}
.rel{padding:8px 0;border-bottom:1px solid var(--line)}.rel:last-child{border:0}
.crow .ok{color:var(--sage);font-weight:600}

mark{background:rgba(201,162,75,.28);color:inherit;border-radius:3px;padding:0 1px}

.rich{font-size:var(--rs,16px)}
html[data-read="reading"] .rich{font-family:Newsreader,Georgia,serif;line-height:1.75;max-width:62ch}
html[data-read="reading"] .rich p{margin-bottom:16px}
.opt{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 4px}
.opt button{flex:1 1 0;min-width:72px;min-height:44px;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:12px;font:inherit;cursor:pointer;padding:8px 10px}
.opt button[aria-pressed="true"]{background:var(--navy);color:var(--on-navy);border-color:var(--navy)}
.sset{margin-top:22px}.sset h2{font-family:Newsreader,Georgia,serif;font-size:19px;margin-bottom:2px}.sset p.d{font-size:14px;color:var(--muted);margin:0 0 4px}
.sample{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:10px}

.stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:6px}
.stats div{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.stats strong{display:block;font:600 26px Newsreader,Georgia,serif}
.stats span{font-size:13px;color:var(--muted)}
.crow .bar{display:block;height:6px;border-radius:3px;background:var(--tint);margin-top:8px;overflow:hidden}
.crow .bar i{display:block;height:100%;background:var(--sage);border-radius:3px}