/* ============================================================
   COHORT — "Signal" dark-first design system
   Shared across all prototype pages
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Instrument+Serif:ital@0;1&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  --bg:#09090B; --surface:#111113; --card:#18181B; --elev:#27272A;
  --border:#27272A; --border-2:#3F3F46;
  --text:#FAFAFA; --text-2:#A1A1AA; --text-3:#71717A;
  --em:#10B981; --em-d:#059669; --em-soft:rgba(16,185,129,.12);
  --violet:#8B5CF6; --violet-soft:rgba(139,92,246,.14);
  --amber:#F59E0B; --red:#EF4444; --sky:#38BDF8; --pink:#F472B6;
  --r:12px; --r-sm:8px;
  --on-accent:#04120C;
  --rail:64px; --subrail:236px; --topbar:60px;
  --shadow:0 20px 50px rgba(0,0,0,.4);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:'Inter',sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
h1,h2,h3,h4{font-weight:700;line-height:1.12;letter-spacing:-.025em}
img{max-width:100%;display:block}
.mono{font-family:'JetBrains Mono',monospace}
.serif{font-family:'Instrument Serif',serif;font-style:italic;font-weight:400}
::selection{background:var(--em-soft);color:var(--em)}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:var(--elev);border-radius:99px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:var(--border-2)}

/* ---------- buttons ---------- */
.btn{font-family:'Inter';font-weight:600;font-size:14px;padding:9px 16px;border-radius:8px;cursor:pointer;border:1px solid transparent;transition:.16s;display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.btn-em{background:var(--em);color:var(--on-accent)}
.btn-em:hover{background:var(--em-d)}
.btn-ghost{background:var(--card);color:var(--text);border-color:var(--border-2)}
.btn-ghost:hover{border-color:var(--text-3);background:var(--elev)}
.btn-sm{padding:6px 12px;font-size:13px}
.btn-icon{width:36px;height:36px;padding:0;justify-content:center;border-radius:8px;background:var(--card);border:1px solid var(--border);color:var(--text-2)}
.btn-icon:hover{color:var(--text);border-color:var(--border-2)}
.eyebrow{font-family:'JetBrains Mono',monospace;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--em)}
.pill{font-family:'JetBrains Mono';font-size:10.5px;padding:3px 9px;border-radius:6px;background:var(--em-soft);color:var(--em);white-space:nowrap}
.pill-violet{background:var(--violet-soft);color:var(--violet)}
.pill-amber{background:rgba(245,158,11,.14);color:var(--amber)}
.pill-gray{background:var(--elev);color:var(--text-2)}

/* avatars */
.av{border-radius:8px;background:linear-gradient(135deg,var(--em),var(--sky));display:grid;place-items:center;color:var(--on-accent);font-weight:700;flex-shrink:0;overflow:hidden}
.av.round{border-radius:50%}
.av.g1{background:linear-gradient(135deg,var(--em),var(--sky))}
.av.g2{background:linear-gradient(135deg,var(--violet),var(--sky))}
.av.g3{background:linear-gradient(135deg,var(--amber),var(--red))}
.av.g4{background:linear-gradient(135deg,var(--pink),var(--violet))}
.av.g5{background:linear-gradient(135deg,var(--sky),var(--em))}
.av.g6{background:linear-gradient(135deg,var(--em),var(--amber))}

/* ============================================================
   APP SHELL
   ============================================================ */
.app{display:grid;grid-template-columns:var(--rail) var(--subrail) 1fr;min-height:100vh}
.app.no-subrail{grid-template-columns:var(--rail) 1fr}

/* icon rail */
.icon-rail{position:sticky;top:0;height:100vh;border-right:1px solid var(--border);background:var(--surface);display:flex;flex-direction:column;align-items:center;padding:14px 0;gap:6px;z-index:30}
.icon-rail .brand{width:38px;height:38px;border-radius:10px;background:var(--em);color:var(--on-accent);display:grid;place-items:center;font-weight:800;font-size:18px;margin-bottom:10px}
.ir{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-size:18px;color:var(--text-3);cursor:pointer;transition:.15s;position:relative}
.ir:hover{background:var(--card);color:var(--text)}
.ir.active{background:var(--em-soft);color:var(--em)}
.ir .tip{position:absolute;left:52px;top:50%;transform:translateY(-50%) scale(.95);background:var(--elev);color:var(--text);font-size:12px;font-weight:600;padding:5px 10px;border-radius:7px;white-space:nowrap;opacity:0;pointer-events:none;transition:.15s;border:1px solid var(--border-2);z-index:40}
.ir:hover .tip{opacity:1;transform:translateY(-50%) scale(1)}
.icon-rail .sp{flex:1}

/* sub-rail */
.sub-rail{position:sticky;top:0;height:100vh;overflow-y:auto;border-right:1px solid var(--border);background:var(--surface);padding:18px 12px;z-index:20}
.sr-head{padding:0 8px 14px;border-bottom:1px solid var(--border);margin-bottom:12px}
.sr-head .name{font-size:15px;font-weight:700;display:flex;align-items:center;gap:9px}
.sr-head .name .badge{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--em),var(--sky));display:grid;place-items:center;font-size:13px;color:var(--on-accent);font-weight:800}
.sr-head .meta{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3);margin-top:5px;padding-left:2px}
.rnav{display:flex;flex-direction:column;gap:2px}
.rnav a{display:flex;align-items:center;gap:11px;padding:9px 11px;border-radius:8px;font-size:13.5px;color:var(--text-2);font-weight:500;transition:.14s}
.rnav a .i{width:17px;text-align:center;font-size:14px}
.rnav a .count{margin-left:auto;font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3);background:var(--card);padding:1px 7px;border-radius:99px}
.rnav a.active{background:var(--card);color:var(--text)}
.rnav a.active .count{background:var(--em-soft);color:var(--em)}
.rnav a:not(.active):hover{background:var(--card);color:var(--text)}
.sr-sec{font-family:'JetBrains Mono';font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-3);padding:18px 11px 8px;display:flex;justify-content:space-between;align-items:center}
.sr-sec .add{cursor:pointer;color:var(--text-3)}
.sr-sec .add:hover{color:var(--em)}
.sr-progress{margin:14px 8px 0;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:13px}
.sr-progress .lvl{display:flex;justify-content:space-between;font-size:12px;font-weight:600;margin-bottom:8px}
.sr-progress .lvl .xp{font-family:'JetBrains Mono';color:var(--em)}
.bar{height:6px;background:var(--elev);border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--em);border-radius:99px;transition:width .5s ease}
.sr-progress .sub{font-family:'JetBrains Mono';font-size:10px;color:var(--text-3);margin-top:7px}

/* main */
.main{min-width:0;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;height:var(--topbar);background:rgba(9,9,11,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:16px;padding:0 24px;z-index:25}
.topbar .crumb{font-size:16px;font-weight:700;display:flex;align-items:center;gap:9px}
.topbar .crumb .sub{font-family:'JetBrains Mono';font-size:11px;color:var(--text-3);font-weight:500}
.topbar .search{flex:1;max-width:360px;margin-left:8px;display:flex;align-items:center;gap:9px;background:var(--card);border:1px solid var(--border);border-radius:9px;padding:8px 13px;color:var(--text-3);font-size:13px}
.topbar .search input{flex:1;background:transparent;border:none;outline:none;color:var(--text);font-family:inherit;font-size:13px}
.topbar .search kbd{font-family:'JetBrains Mono';font-size:10px;background:var(--elev);padding:2px 6px;border-radius:5px;color:var(--text-3)}
.topbar .sp{flex:1}
.topbar .tb-actions{display:flex;align-items:center;gap:10px}
.topbar .me{width:34px;height:34px;border-radius:9px;font-size:13px}
.content{padding:26px 24px;flex:1;width:100%}
.content.narrow{max-width:1160px;margin:0 auto}
.page-head{margin-bottom:22px}
.page-head h1{font-size:26px}
.page-head p{color:var(--text-2);font-size:14.5px;margin-top:6px}
.page-head .serif{color:var(--em)}

/* ============================================================
   COMMUNITY / FEED
   ============================================================ */
.feed-grid{display:grid;grid-template-columns:1fr 300px;gap:22px;align-items:start}
.composer{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:14px;margin-bottom:16px}
.composer .top{display:flex;align-items:center;gap:12px}
.composer .top .av{width:38px;height:38px}
.composer input.ci{flex:1;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:10px 13px;color:var(--text);font-family:inherit;font-size:14px;outline:none}
.composer input.ci:focus{border-color:var(--border-2)}
.composer .tools{display:none;margin-top:12px;padding-top:12px;border-top:1px solid var(--border);align-items:center;gap:6px}
.composer.open .tools{display:flex}
.composer .tool{width:34px;height:34px;border-radius:8px;display:grid;place-items:center;color:var(--text-3);cursor:pointer;font-size:15px}
.composer .tool:hover{background:var(--elev);color:var(--text)}
.composer .cat-sel{margin-left:auto;background:var(--surface);border:1px solid var(--border);color:var(--text-2);font-family:inherit;font-size:12.5px;padding:7px 10px;border-radius:8px;outline:none}
.chips{display:flex;gap:7px;margin-bottom:16px;flex-wrap:wrap}
.chip{font-family:'JetBrains Mono';font-size:11.5px;padding:6px 13px;border-radius:8px;border:1px solid var(--border);background:var(--card);cursor:pointer;color:var(--text-2);transition:.14s}
.chip:hover{border-color:var(--border-2);color:var(--text)}
.chip.active{background:var(--em-soft);color:var(--em);border-color:var(--em)}

.post{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:17px;margin-bottom:13px;transition:.15s}
.post:hover{border-color:var(--border-2)}
.post .ph{display:flex;align-items:center;gap:11px;margin-bottom:11px}
.post .ph .av{width:38px;height:38px}
.post .ph .nm{font-size:13.5px;font-weight:600;display:flex;align-items:center;gap:7px}
.post .ph .lvlbadge{font-family:'JetBrains Mono';font-size:9.5px;color:var(--violet);background:var(--violet-soft);padding:1px 6px;border-radius:5px}
.post .ph .sub{font-family:'JetBrains Mono';font-size:11px;color:var(--text-3)}
.post .ph .cat{margin-left:auto}
.post h3.pt{font-size:16px;margin-bottom:6px}
.post .pb{font-size:14px;color:var(--text-2)}
.post .pinned-flag{display:inline-flex;align-items:center;gap:5px;font-family:'JetBrains Mono';font-size:10px;color:var(--amber);margin-bottom:8px}
.post .media{margin-top:12px;border-radius:10px;height:190px;background:linear-gradient(135deg,var(--elev),var(--surface));border:1px solid var(--border);display:grid;place-items:center;color:var(--text-3);font-size:13px}
.post .media.g{background:linear-gradient(135deg,#12241C,#1a1030)}
.pactions{display:flex;gap:6px;margin-top:14px;font-size:12.5px;color:var(--text-3);font-weight:500}
.pactions .a{display:flex;gap:6px;align-items:center;cursor:pointer;padding:5px 10px;border-radius:7px;transition:.14s}
.pactions .a:hover{background:var(--elev);color:var(--text)}
.pactions .a.liked{color:var(--em)}
.pactions .sp{flex:1}

/* right widgets */
.widget{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:15px;margin-bottom:14px}
.widget h4{font-size:13px;margin-bottom:12px;display:flex;align-items:center;gap:7px}
.widget h4 .view-all{margin-left:auto;font-family:'JetBrains Mono';font-size:10px;color:var(--em);font-weight:500;cursor:pointer}
.lbrow{display:flex;align-items:center;gap:10px;padding:6px 0;font-size:12.5px}
.lbrow .rk{width:18px;font-family:'JetBrains Mono';font-weight:600;color:var(--text-3);text-align:center}
.lbrow .rk.top{color:var(--em)}
.lbrow .av{width:26px;height:26px;font-size:10px}
.lbrow .nm{font-weight:500}
.lbrow .pts{margin-left:auto;font-family:'JetBrains Mono';font-weight:600;color:var(--em)}
.evrow{display:flex;gap:12px;padding:9px 0;border-bottom:1px solid var(--border)}
.evrow:last-child{border:none}
.evrow .date{text-align:center;width:40px;flex-shrink:0;background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:5px 0}
.evrow .date b{display:block;font-size:16px;line-height:1}
.evrow .date span{font-family:'JetBrains Mono';font-size:9px;text-transform:uppercase;color:var(--em)}
.evrow .et b{font-size:12.5px;display:block;font-weight:600}
.evrow .et span{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}
.stat-mini{display:flex;justify-content:space-between;padding:5px 0;font-size:12.5px;color:var(--text-2)}
.stat-mini b{font-family:'JetBrains Mono';color:var(--text)}

/* ============================================================
   POST DETAIL / COMMENTS
   ============================================================ */
.thread{max-width:760px;margin:0 auto}
.back-link{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--text-3);margin-bottom:16px;font-weight:500}
.back-link:hover{color:var(--text)}
.comment{display:flex;gap:12px;padding:15px 0;border-top:1px solid var(--border)}
.comment .av{width:34px;height:34px;font-size:12px}
.comment .cbody{flex:1;min-width:0}
.comment .ch{display:flex;align-items:center;gap:8px;margin-bottom:3px}
.comment .ch b{font-size:13px;font-weight:600}
.comment .ch .sub{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}
.comment p{font-size:13.5px;color:var(--text-2)}
.comment .cact{display:flex;gap:14px;margin-top:7px;font-size:11.5px;color:var(--text-3);font-weight:500}
.comment .cact span{cursor:pointer}.comment .cact span:hover{color:var(--em)}
.comment.reply{margin-left:46px;border-top:1px dashed var(--border)}
.comment-box{display:flex;gap:12px;margin-top:18px;padding-top:18px;border-top:1px solid var(--border)}
.comment-box .av{width:34px;height:34px;font-size:12px}
.comment-box .cbwrap{flex:1}
.comment-box textarea{width:100%;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:11px 13px;color:var(--text);font-family:inherit;font-size:13.5px;resize:vertical;min-height:70px;outline:none}
.comment-box textarea:focus{border-color:var(--border-2)}
.comment-box .row{display:flex;justify-content:flex-end;margin-top:9px}

/* ============================================================
   CLASSROOM — catalog / course / lesson
   ============================================================ */
.cat-toolbar{display:flex;gap:10px;align-items:center;margin-bottom:20px;flex-wrap:wrap}
.cat-toolbar .search{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--border);border-radius:9px;padding:8px 13px;color:var(--text-3);font-size:13px;min-width:240px}
.cat-toolbar .search input{background:transparent;border:none;outline:none;color:var(--text);font-family:inherit;font-size:13px;flex:1}
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.ccard{background:var(--card);border:1px solid var(--border);border-radius:var(--r);overflow:hidden;cursor:pointer;transition:.18s;display:flex;flex-direction:column}
.ccard:hover{border-color:var(--border-2);transform:translateY(-3px)}
.ccard .cover{height:140px;position:relative;display:grid;place-items:center;font-size:34px}
.ccard .cover.c1{background:linear-gradient(135deg,#0d2b21,#10b98133)}
.ccard .cover.c2{background:linear-gradient(135deg,#1e1b3a,#8b5cf633)}
.ccard .cover.c3{background:linear-gradient(135deg,#2b1e0d,#f59e0b33)}
.ccard .cover.c4{background:linear-gradient(135deg,#2b0d1c,#f472b633)}
.ccard .cover.c5{background:linear-gradient(135deg,#0d1f2b,#38bdf833)}
.ccard .cover.c6{background:linear-gradient(135deg,#0d2b21,#10b98133)}
.ccard .cover .lvl{position:absolute;top:10px;left:10px}
.ccard .cbody{padding:16px;flex:1;display:flex;flex-direction:column}
.ccard h3{font-size:16px;margin-bottom:6px}
.ccard .desc{font-size:12.5px;color:var(--text-3);flex:1}
.ccard .cmeta{display:flex;align-items:center;gap:12px;margin-top:13px;font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}
.ccard .cprog{margin-top:12px}
.ccard .cprog .bar{margin-bottom:5px}
.ccard .cprog .t{font-family:'JetBrains Mono';font-size:10px;color:var(--text-3)}

/* course overview */
.course-hero{background:var(--card);border:1px solid var(--border);border-radius:var(--r);overflow:hidden;margin-bottom:22px;display:grid;grid-template-columns:1.5fr 1fr}
.course-hero .chl{padding:26px}
.course-hero .chl h1{font-size:28px;margin-bottom:10px}
.course-hero .chl p{color:var(--text-2);font-size:14.5px;margin-bottom:18px}
.course-hero .chmeta{display:flex;gap:22px;margin-bottom:20px;flex-wrap:wrap}
.course-hero .chmeta .m b{font-size:19px;display:block}
.course-hero .chmeta .m span{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}
.course-hero .chr{background:radial-gradient(circle at 60% 40%,#12241C,#0d1117);display:grid;place-items:center;font-size:60px;position:relative}
.course-hero .chr .play{width:74px;height:74px;border-radius:50%;background:var(--em);color:var(--on-accent);display:grid;place-items:center;font-size:26px;box-shadow:0 0 50px rgba(16,185,129,.4);cursor:pointer}
.course-layout{display:grid;grid-template-columns:1fr 320px;gap:22px;align-items:start}
.module{background:var(--card);border:1px solid var(--border);border-radius:var(--r);margin-bottom:12px;overflow:hidden}
.module .mh{display:flex;align-items:center;gap:12px;padding:15px 17px;cursor:pointer}
.module .mh .mnum{font-family:'JetBrains Mono';font-size:11px;color:var(--em)}
.module .mh h3{font-size:15px}
.module .mh .mmeta{margin-left:auto;font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}
.module .mh .chev{color:var(--text-3);transition:.2s}
.module.collapsed .mh .chev{transform:rotate(-90deg)}
.module .mlist{border-top:1px solid var(--border)}
.module.collapsed .mlist{display:none}
.lrow{display:flex;align-items:center;gap:12px;padding:12px 17px;font-size:13.5px;color:var(--text-2);border-bottom:1px solid var(--border);cursor:pointer;transition:.14s}
.lrow:last-child{border:none}
.lrow:hover{background:var(--surface);color:var(--text)}
.lrow .tick{width:22px;height:22px;border-radius:50%;border:1.5px solid var(--border-2);display:grid;place-items:center;font-size:10px;flex-shrink:0}
.lrow.done .tick{background:var(--em);border-color:var(--em);color:var(--on-accent)}
.lrow.now{background:var(--surface);color:var(--text)}
.lrow.now .tick{border-color:var(--em);color:var(--em)}
.lrow .type{font-family:'JetBrains Mono';font-size:9.5px;color:var(--text-3);border:1px solid var(--border);padding:1px 6px;border-radius:5px}
.lrow .dur{margin-left:auto;font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}
.side-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px;margin-bottom:16px}
.side-card h4{font-size:14px;margin-bottom:14px}
.instructor{display:flex;gap:12px;align-items:center;margin-bottom:14px}
.instructor .av{width:46px;height:46px}
.instructor b{font-size:14px;display:block}
.instructor span{font-family:'JetBrains Mono';font-size:11px;color:var(--text-3)}

/* lesson player */
.lesson-layout{display:grid;grid-template-columns:300px 1fr;min-height:calc(100vh - var(--topbar))}
.lesson-outline{border-right:1px solid var(--border);background:var(--surface);padding:18px 14px;overflow-y:auto;height:calc(100vh - var(--topbar));position:sticky;top:var(--topbar)}
.lo-course{font-size:14px;font-weight:700}
.lo-prog{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3);margin:6px 0 10px}
.lo-mtitle{font-family:'JetBrains Mono';font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--text-3);margin:16px 0 8px}
.lesson-main{min-width:0}
.player{aspect-ratio:16/8.2;background:radial-gradient(circle at 50% 42%,#12241C,#09090B);display:grid;place-items:center;position:relative}
.player .play{width:78px;height:78px;border-radius:50%;background:var(--em);display:grid;place-items:center;font-size:26px;color:var(--on-accent);cursor:pointer;box-shadow:0 0 60px rgba(16,185,129,.4);transition:.2s}
.player .play:hover{transform:scale(1.06)}
.player .plabel{position:absolute;bottom:16px;left:20px;font-family:'JetBrains Mono';font-size:11px;color:var(--text-2);background:rgba(0,0,0,.55);padding:5px 12px;border-radius:6px}
.player .ptrack{position:absolute;bottom:0;left:0;right:0;height:4px;background:rgba(255,255,255,.12)}
.player .ptrack i{display:block;height:100%;width:35%;background:var(--em)}
.lesson-body{padding:26px 32px;max-width:820px}
.lesson-body .lb-actions{display:flex;gap:12px;align-items:center;margin:20px 0 26px;padding-bottom:26px;border-bottom:1px solid var(--border)}
.lesson-body h2{font-size:24px;margin:8px 0 12px}
.lesson-body p{font-size:15px;color:var(--text-2);margin-bottom:14px}
.lesson-body .reward{margin-left:auto;font-family:'JetBrains Mono';font-size:12px;color:var(--em);background:var(--em-soft);padding:7px 12px;border-radius:8px}
.resources{display:flex;flex-direction:column;gap:8px;margin:6px 0 26px}
.res{display:flex;align-items:center;gap:11px;background:var(--card);border:1px solid var(--border);border-radius:9px;padding:11px 14px;font-size:13px;cursor:pointer}
.res:hover{border-color:var(--border-2)}
.res .ri{color:var(--em)}
.res .dl{margin-left:auto;color:var(--text-3);font-family:'JetBrains Mono';font-size:11px}

/* ============================================================
   CALENDAR / EVENTS
   ============================================================ */
.cal-layout{display:grid;grid-template-columns:1fr 340px;gap:22px;align-items:start}
.cal-panel{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:20px}
.cal-top{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.cal-top h3{font-size:18px}
.cal-top .nav{display:flex;gap:6px;margin-left:auto}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.cal-grid .dh{font-family:'JetBrains Mono';font-size:10px;color:var(--text-3);text-align:center;padding:6px 0;text-transform:uppercase}
.cell-day{aspect-ratio:1;border:1px solid var(--border);border-radius:9px;padding:7px;font-size:12px;color:var(--text-2);position:relative;background:var(--surface);cursor:pointer;transition:.14s;display:flex;flex-direction:column;gap:3px}
.cell-day:hover{border-color:var(--border-2)}
.cell-day.off{opacity:.35}
.cell-day.today{border-color:var(--em)}
.cell-day .dot{font-size:9px;padding:2px 5px;border-radius:5px;font-weight:600;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.cell-day .dot.em{background:var(--em-soft);color:var(--em)}
.cell-day .dot.violet{background:var(--violet-soft);color:var(--violet)}
.cell-day .dot.amber{background:rgba(245,158,11,.14);color:var(--amber)}
.ev-list-item{display:flex;gap:14px;background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:15px;margin-bottom:12px;cursor:pointer;transition:.15s}
.ev-list-item:hover{border-color:var(--border-2)}
.ev-list-item.sel{border-color:var(--em)}
.ev-list-item .date{text-align:center;width:52px;flex-shrink:0;background:var(--surface);border:1px solid var(--border);border-radius:9px;padding:8px 0;height:fit-content}
.ev-list-item .date b{display:block;font-size:20px;line-height:1}
.ev-list-item .date span{font-family:'JetBrains Mono';font-size:9.5px;text-transform:uppercase;color:var(--em)}
.ev-list-item h4{font-size:14.5px;margin-bottom:4px}
.ev-list-item .emeta{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3);display:flex;gap:10px;flex-wrap:wrap}
.ev-detail .hero{height:120px;border-radius:10px;background:linear-gradient(135deg,#12241C,#1a1030);margin-bottom:16px;display:grid;place-items:center;font-size:36px}
.ev-detail h3{font-size:19px;margin-bottom:10px}
.ev-detail .drow{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--text-2);margin-bottom:9px}
.ev-detail .drow .i{color:var(--em);width:18px}
.attendees{display:flex;margin:14px 0}
.attendees .av{width:30px;height:30px;font-size:10px;border:2px solid var(--card);margin-left:-8px}
.attendees .av:first-child{margin:0}
.attendees .more{width:30px;height:30px;border-radius:8px;background:var(--elev);display:grid;place-items:center;font-size:10px;font-family:'JetBrains Mono';color:var(--text-2);margin-left:-8px;border:2px solid var(--card)}

/* ============================================================
   MEMBERS
   ============================================================ */
.mem-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.mcard{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:20px;text-align:center;cursor:pointer;transition:.18s}
.mcard:hover{border-color:var(--border-2);transform:translateY(-3px)}
.mcard .av{width:64px;height:64px;font-size:22px;margin:0 auto 12px;border-radius:14px}
.mcard b{font-size:15px;display:block}
.mcard .role{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3);margin-top:3px}
.mcard .lvl{display:inline-flex;margin-top:10px}
.mcard .mstats{display:flex;justify-content:center;gap:16px;margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}
.mcard .mstats .s b{font-family:'JetBrains Mono';font-size:14px;display:block;color:var(--text)}
.mcard .mstats .s span{font-family:'JetBrains Mono';font-size:9px;color:var(--text-3)}

/* ============================================================
   LEADERBOARD
   ============================================================ */
.lb-tabs{display:inline-flex;gap:3px;padding:4px;background:var(--card);border:1px solid var(--border);border-radius:10px;margin-bottom:22px}
.lb-tab{font-weight:600;font-size:13px;padding:8px 16px;border-radius:7px;cursor:pointer;border:none;background:transparent;color:var(--text-2)}
.lb-tab.active{background:var(--elev);color:var(--text)}
.podium{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;align-items:end;margin-bottom:22px}
.pod{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:22px 16px;text-align:center}
.pod.first{background:linear-gradient(180deg,var(--em-soft),var(--card));border-color:var(--em);padding:30px 16px}
.pod .medal{font-size:26px}
.pod .av{width:58px;height:58px;font-size:20px;margin:10px auto;border-radius:15px}
.pod b{font-size:15px;display:block}
.pod .lvl{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3);margin-top:3px}
.pod .pts{font-family:'JetBrains Mono';font-weight:600;color:var(--em);margin-top:8px;font-size:15px}
.lb-list{background:var(--card);border:1px solid var(--border);border-radius:var(--r);overflow:hidden}
.lb-item{display:flex;align-items:center;gap:15px;padding:14px 18px;border-bottom:1px solid var(--border);font-size:14px}
.lb-item:last-child{border:none}
.lb-item.me{background:var(--em-soft)}
.lb-item .rk{width:28px;font-family:'JetBrains Mono';font-weight:600;font-size:15px;color:var(--text-3)}
.lb-item .av{width:40px;height:40px;font-size:14px}
.lb-item .nm b{font-weight:600}
.lb-item .nm .sub{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}
.lb-item .streak{font-family:'JetBrains Mono';font-size:12px;color:var(--amber);margin-left:auto}
.lb-item .score{font-family:'JetBrains Mono';font-weight:600;color:var(--em);font-size:16px;width:70px;text-align:right}

/* ============================================================
   PROFILE
   ============================================================ */
.prof-hero{background:var(--card);border:1px solid var(--border);border-radius:var(--r);overflow:hidden;margin-bottom:22px}
.prof-hero .banner{height:120px;background:linear-gradient(120deg,#0d2b21,#1e1b3a)}
.prof-hero .pbody{padding:0 26px 24px;display:flex;gap:20px;align-items:flex-end;margin-top:-40px}
.prof-hero .av{width:96px;height:96px;font-size:34px;border:4px solid var(--card);border-radius:22px}
.prof-hero .pinfo{flex:1;padding-bottom:4px}
.prof-hero .pinfo h1{font-size:24px;display:flex;align-items:center;gap:10px}
.prof-hero .pinfo .role{font-family:'JetBrains Mono';font-size:12px;color:var(--text-3);margin-top:4px}
.prof-hero .pinfo .bio{font-size:13.5px;color:var(--text-2);margin-top:10px;max-width:520px}
.prof-hero .pactions{padding-bottom:6px;display:flex;gap:10px}
.prof-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:22px}
.pstat{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px}
.pstat b{font-size:24px;display:block;letter-spacing:-.02em}
.pstat span{font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}
.prof-tabs{display:flex;gap:2px;border-bottom:1px solid var(--border);margin-bottom:20px}
.ptab{padding:11px 16px;font-size:13.5px;font-weight:600;color:var(--text-3);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.ptab.active{color:var(--text);border-color:var(--em)}
.ptab-panel{display:none}.ptab-panel.active{display:block}
.badge-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.badge{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px;text-align:center}
.badge.locked{opacity:.4;filter:grayscale(1)}
.badge .bico{font-size:30px}
.badge b{font-size:12.5px;display:block;margin-top:8px}
.badge span{font-family:'JetBrains Mono';font-size:9.5px;color:var(--text-3)}
.act-feed .act{display:flex;gap:12px;padding:13px 0;border-bottom:1px solid var(--border);font-size:13.5px;align-items:center}
.act-feed .act .ai{width:34px;height:34px;border-radius:9px;background:var(--elev);display:grid;place-items:center;color:var(--em);flex-shrink:0}
.act-feed .act .at{color:var(--text-2)}.act-feed .act .at b{color:var(--text)}
.act-feed .act .tm{margin-left:auto;font-family:'JetBrains Mono';font-size:10.5px;color:var(--text-3)}

/* ============================================================
   TOAST
   ============================================================ */
.toast-wrap{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);z-index:100;display:flex;flex-direction:column;gap:10px;align-items:center}
.toast{background:var(--elev);border:1px solid var(--border-2);border-radius:10px;padding:12px 18px;font-size:13.5px;font-weight:500;box-shadow:var(--shadow);display:flex;align-items:center;gap:10px;animation:tin .3s ease;max-width:90vw}
.toast .ti{color:var(--em)}
@keyframes tin{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.toast.out{opacity:0;transform:translateY(12px);transition:.3s}

/* section title */
.sec-title{font-size:16px;margin:26px 0 14px;display:flex;align-items:center;gap:9px}
.sec-title:first-child{margin-top:0}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:1100px){
  .course-grid,.mem-grid{grid-template-columns:repeat(2,1fr)}
  .badge-grid{grid-template-columns:repeat(4,1fr)}
  .feed-grid,.course-layout,.cal-layout{grid-template-columns:1fr}
  .feed-grid .rightcol,.course-layout .rightcol,.cal-layout .rightcol{display:none}
  .course-hero{grid-template-columns:1fr}
  .course-hero .chr{min-height:180px}
}
@media(max-width:820px){
  :root{--subrail:0px}
  .app{grid-template-columns:var(--rail) 1fr}
  .sub-rail{display:none}
  .topbar .search{display:none}
  .lesson-layout{grid-template-columns:1fr}
  .lesson-outline{display:none}
  .prof-stats,.podium{grid-template-columns:1fr 1fr}
  .course-grid,.mem-grid{grid-template-columns:1fr}
  .prof-hero .pbody{flex-direction:column;align-items:flex-start}
}


/* ============================================================
   LIGHT THEME (Lumen) — toggled via html[data-theme="light"]
   ============================================================ */
html[data-theme="light"]{
  --bg:#F7F4EF; --surface:#FCFAF6; --card:#FDFBF7; --elev:#EFE7DE;
  --border:#DDD5C8; --border-2:#CDC1AF;
  --text:#1A1714; --text-2:#5A5148; --text-3:#8A8073;
  --em:#B5502F; --em-d:#9A4026; --em-soft:rgba(181,80,47,.10);
  --violet:#4A5D48; --violet-soft:rgba(74,93,72,.14);
  --amber:#C08A3E; --red:#C0392B; --sky:#7A9A6E; --pink:#C77B6B;
  --on-accent:#FFFFFF;
  --shadow:0 12px 34px rgba(26,23,20,.12);
}
html[data-theme="light"] body{color:var(--text)}
html[data-theme="light"] .topbar{background:rgba(247,244,239,.85)}
html[data-theme="light"] .ccard .cover.c1,html[data-theme="light"] .ccard .cover.c6{background:linear-gradient(135deg,#EFE7DE,#B5502F26)}
html[data-theme="light"] .ccard .cover.c2{background:linear-gradient(135deg,#EFE7DE,#4A5D4826)}
html[data-theme="light"] .ccard .cover.c3{background:linear-gradient(135deg,#EFE7DE,#C08A3E33)}
html[data-theme="light"] .ccard .cover.c4{background:linear-gradient(135deg,#EFE7DE,#C77B6B33)}
html[data-theme="light"] .ccard .cover.c5{background:linear-gradient(135deg,#EFE7DE,#7A9A6E33)}
html[data-theme="light"] .course-hero .chr{background:radial-gradient(circle at 60% 40%,#3A2E26,#1A1714)}
html[data-theme="light"] .player{background:radial-gradient(circle at 50% 42%,#3A2E26,#1A1714)}
html[data-theme="light"] .player .plabel{color:#F7F4EF}
html[data-theme="light"] .post .media.g,html[data-theme="light"] .ev-detail .hero{background:linear-gradient(135deg,#EFE7DE,#E9DED2)}
html[data-theme="light"] .prof-hero .banner{background:linear-gradient(120deg,#B5502F,#C08A3E)}
html[data-theme="light"] .player .play,html[data-theme="light"] .course-hero .chr .play{box-shadow:0 0 50px rgba(181,80,47,.30)}
html[data-theme="light"] .pill-amber,html[data-theme="light"] .cell-day .dot.amber{background:rgba(192,138,62,.16)}

/* ============================================================
   SVG ICON SYSTEM  (line icons inherit currentColor = brand)
   ============================================================ */
.ico{display:inline-flex;align-items:center;justify-content:center;line-height:0;vertical-align:middle}
.ico svg,[data-ic] svg{display:block;width:16px;height:16px;stroke-width:1.7}
.icon-rail .brand{color:var(--on-accent)}
.icon-rail .brand svg{width:22px;height:22px}
.ir > .ico svg{width:21px;height:21px}
.rnav .i{display:inline-flex;align-items:center;justify-content:center}
.rnav .i svg{width:15px;height:15px}
.tb-actions .btn-icon svg,.theme-toggle svg{width:17px;height:17px}
.topbar .search .ico svg{width:15px;height:15px}
.composer .tool svg{width:17px;height:17px}
.widget h4 .ico svg{width:15px;height:15px}
.sr-head .name .badge svg{width:15px;height:15px}
.cover .cover-ic svg{width:40px;height:40px;stroke-width:1.4;opacity:.92}
.badge .bico svg{width:27px;height:27px;stroke-width:1.5}
.act .ai svg{width:16px;height:16px}
.mcard .av svg{width:26px;height:26px}

/* theme toggle button */
.theme-toggle{width:36px;height:36px;border-radius:8px;background:var(--card);border:1px solid var(--border);color:var(--text-2);display:grid;place-items:center;cursor:pointer;transition:.16s;flex-shrink:0}
.theme-toggle:hover{color:var(--text);border-color:var(--border-2)}
.theme-toggle.floating{position:fixed;top:18px;right:18px;z-index:60;box-shadow:var(--shadow)}

.ic-xs svg{width:12px !important;height:12px !important}
.streak .ic-xs,.xp .ic-xs,.sub .ic-xs,.lvl .xp .ic-xs{vertical-align:-1px}