/* Layout: slim navy rail + content. Look follows cswithrizwan.com: off-white ground, navy ink, Fraunces headings, Inter body, near-black pill buttons, amber highlight. */
:root{--bg:#f9fafb;--surface:#fff;--ink:#10182b;--muted:#4a5468;--line:#e4e7ed;--accent:#232024;--accent-ink:#fff;--accent-soft:#fbf0dc;--hi:#e7a33e;--warn:#8a5a0b;--warn-soft:#fbf0dc;--ok:#10182b;--ok-soft:#e9ebf0;--rail:#ffffff;--rail-ink:#4a5468;--rail-line:#e4e7ed;
--sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;--serif:'Fraunces',Georgia,serif;--mono:'JetBrains Mono',ui-monospace,Menlo,monospace}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0d1220;--surface:#151c2e;--ink:#eef1f7;--muted:#9aa4b8;--line:#272f44;--accent:#f1f3f7;--accent-ink:#10182b;--accent-soft:#3a2f18;--hi:#e7a33e;--warn:#e7a33e;--warn-soft:#3a2f18;--ok:#eef1f7;--ok-soft:#272f44;--rail:#0d1220;--rail-ink:#9aa4b8;--rail-line:#272f44;color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0d1220;--surface:#151c2e;--ink:#eef1f7;--muted:#9aa4b8;--line:#272f44;--accent:#f1f3f7;--accent-ink:#10182b;--accent-soft:#3a2f18;--hi:#e7a33e;--warn:#e7a33e;--warn-soft:#3a2f18;--ok:#eef1f7;--ok-soft:#272f44;--rail:#0d1220;--rail-ink:#9aa4b8;--rail-line:#272f44;color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font:15px/1.55 var(--sans);margin:0}
button,input,select{font:inherit;color:inherit}
a{color:var(--ink);text-underline-offset:3px}
.app{display:grid;grid-template-columns:232px minmax(0,1fr);min-height:100vh}
.rail{background:var(--rail);color:var(--rail-ink);border-right:1px solid var(--rail-line);padding:20px 14px;display:flex;flex-direction:column;gap:4px;position:sticky;top:0;height:100vh;overflow:auto}
.brand{font:600 19px var(--serif);color:var(--ink);padding:4px 10px 14px}
.logo{display:block;width:168px;max-width:100%;height:auto}
.logo-d{display:none}
.eyebrow{font:500 12px var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 10px}
.eyebrow:before{content:"// ";color:var(--hi)}
.brand small{display:block;font:400 11px var(--mono);color:var(--rail-ink);margin-top:6px}
.role{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--rail-line);border-radius:100px;padding:3px;margin:0 4px 14px}
.role button{border:0;background:none;color:var(--rail-ink);padding:7px;border-radius:100px;cursor:pointer;font-weight:600}
.role button[aria-pressed=true]{background:var(--accent);color:var(--accent-ink)}
.nav a{display:block;padding:9px 12px;color:var(--rail-ink);text-decoration:none;font-weight:500;border-bottom:2px solid transparent;width:max-content;max-width:100%}
.nav a:hover{color:var(--ink)}
.nav a[aria-current=page]{color:var(--ink);border-bottom-color:var(--hi)}
.role.mode{margin-top:auto}.role.mode+.foot{margin-top:0}.rail .foot{font:400 11px/1.5 var(--mono);padding:10px}
main{padding:28px max(16px,env(safe-area-inset-right,0px)) 48px 32px;min-width:0}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:-.02em;font-optical-sizing:auto}
h1{font-size:38px;line-height:1.12;letter-spacing:-.025em;margin:0 0 8px;text-wrap:balance}
.sub{color:var(--muted);margin:0 0 22px}
h2{font-size:22px;line-height:1.25;margin:0 0 12px}
.grid{display:grid;gap:16px}
.stats{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));margin-bottom:20px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.stat b{display:block;font:500 26px var(--mono);font-variant-numeric:tabular-nums}
.stat span{color:var(--muted);font-size:13px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px}
.two{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}
.tablewrap{overflow-x:auto}
table{border-collapse:collapse;width:100%;min-width:520px}
th{font:500 11px var(--mono);text-transform:uppercase;letter-spacing:.08em;color:var(--muted);text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
td{padding:10px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:last-child td{border-bottom:0}
.pill{display:inline-block;padding:2px 10px;border-radius:99px;font-size:12px;font-weight:600;background:var(--accent-soft);color:var(--ink)}
.pill.warn{background:var(--warn-soft);color:var(--warn)}.pill.ok{background:var(--ok-soft);color:var(--ok)}
.btn{background:var(--accent);color:var(--accent-ink);border:0;border-radius:100px;padding:10px 20px;font-weight:600;cursor:pointer;text-decoration:none;display:inline-block}
.btn.ghost{background:none;color:var(--ink);border:1px solid var(--line)}
.btn.sm{padding:4px 12px;font-size:13px}
.btn:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,.row:focus-visible{outline:2px solid var(--hi);outline-offset:2px}
.field{display:grid;gap:5px;margin-bottom:12px}
.field label{font-weight:600;font-size:13px}
input[type=text],input[type=search],select{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:9px 11px;width:100%}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:14px}
.toolbar select,.toolbar input{width:auto;min-width:200px}
.lec{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--line)}
.lec:last-child{border-bottom:0}
.lec .t{flex:1;min-width:0;overflow-wrap:anywhere}
.lec code{font:400 11px var(--mono);color:var(--muted)}
.msg{font-size:13px;margin-top:8px;min-height:20px}
.msg.err{color:var(--warn);font-weight:600}.msg.good{color:var(--ink);font-weight:600}
.courses{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.course{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px;display:grid;gap:10px;align-content:start}
.course h3{margin:0;font-size:24px;line-height:1.2}
.meta{font-size:13px;color:var(--muted)}
.bar{height:8px;background:var(--line);border-radius:9px;overflow:hidden;display:flex}
.bar i{display:block;height:100%;background:var(--ink)}
.bar i.part{background:var(--hi)}
.big{font:500 28px var(--mono);font-variant-numeric:tabular-nums}
.resume{display:flex;gap:14px;flex-wrap:wrap;align-items:center;justify-content:space-between;background:var(--accent-soft);border-radius:12px;padding:14px 18px;margin-bottom:18px}
.resume b{display:block}
.watch{grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);align-items:start}
.player{aspect-ratio:16/9;background:#000;border-radius:12px;display:grid;place-items:center;color:#a9b2c4;text-align:center;padding:16px;font-size:14px}
.player b{display:block;color:#fff;font:600 19px var(--serif);margin-bottom:6px}
.lp{margin:14px 0}
.lp .top{display:flex;justify-content:space-between;font-size:13px;margin-bottom:6px;gap:10px;flex-wrap:wrap}
.actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.sim{margin-top:14px;font-size:12px;color:var(--muted);border-top:1px dashed var(--line);padding-top:12px}
.sim input{width:100%;accent-color:var(--hi)}
.row{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:10px;cursor:pointer;border:1px solid transparent}
.row:hover{background:var(--bg)}
.row[aria-current=true]{background:var(--accent-soft);border-color:var(--hi)}
.row .tt{flex:1;min-width:0}
.row .pc{font:400 12px var(--mono);color:var(--muted);white-space:nowrap}
.dot{width:16px;height:16px;border-radius:50%;border:2px solid var(--line);flex:none}
.dot.half{border-color:var(--hi);background:linear-gradient(90deg,var(--hi) 50%,transparent 50%)}
.dot.done{background:var(--ink);border-color:var(--ink)}
.list{max-height:480px;overflow:auto}
.mini{display:inline-block;width:90px;height:6px;background:var(--line);border-radius:9px;overflow:hidden;vertical-align:middle;margin-right:8px}
.mini i{display:block;height:100%;background:var(--hi)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .logo-l{display:none}:root:not([data-theme="light"]) .logo-d{display:block}}
:root[data-theme="dark"] .logo-l{display:none}:root[data-theme="dark"] .logo-d{display:block}
.count{display:inline-block;background:var(--hi);color:#10182b;font:600 11px var(--mono);border-radius:99px;padding:0 7px;margin-left:4px}
.banner{display:flex;gap:10px;flex-wrap:wrap;align-items:baseline;background:var(--accent-soft);border-radius:12px;padding:12px 16px;margin-bottom:18px}
.banner span{color:var(--muted);font-size:14px}
.stat .bar.sm{height:5px;margin-top:8px}
.ringtile{display:flex;align-items:center;gap:12px}
.badges{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px}
.bdg{border:1px solid var(--hi);border-radius:12px;padding:12px;display:grid;gap:2px;background:var(--accent-soft)}
.bdg span{font-size:13px;color:var(--muted)}.bdg em{font:500 11px var(--mono);text-transform:uppercase;letter-spacing:.08em;font-style:normal}
.bdg.lock{border-color:var(--line);background:none;opacity:.6}
.titlerow{display:flex;gap:10px;justify-content:space-between;align-items:flex-start;margin-top:16px}
.tabs{display:flex;gap:4px;flex-wrap:wrap;margin:18px 0 10px;border-bottom:1px solid var(--line)}
.tabs button{background:none;border:0;border-bottom:2px solid transparent;padding:9px 12px;cursor:pointer;color:var(--muted);font-weight:600}
.tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--hi)}
.tabs button:focus-visible{outline:2px solid var(--hi)}
textarea{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:9px 11px;width:100%;resize:vertical}
textarea:focus-visible{outline:2px solid var(--hi);outline-offset:2px}
.notes,.res{padding-left:18px;margin:12px 0 0}.notes li{margin-bottom:6px}.res{list-style:none;padding:0}.res li{display:grid;padding:9px 0;border-bottom:1px solid var(--line)}
.qq{margin-bottom:14px}.qq p{margin:0 0 8px}.opts{display:flex;gap:8px;flex-wrap:wrap}
.opt{background:var(--surface);border:1px solid var(--line);border-radius:100px;padding:7px 16px;cursor:pointer}
.opt:hover:not(:disabled){border-color:var(--ink)}
.opt.right{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.opt.wrong{border-color:var(--warn);color:var(--warn);text-decoration:line-through}
.opt:disabled{cursor:default}
.result{font-weight:600;margin:6px 0 10px}
.dbt{border-top:1px solid var(--line);padding:10px 0}.dbt p{margin:2px 0}
.topic{display:flex;gap:10px;justify-content:space-between;align-items:center;flex-wrap:wrap;padding:8px 0;border-bottom:1px solid var(--line)}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:100px;overflow:hidden}
.seg button{background:none;border:0;padding:5px 12px;font-size:13px;cursor:pointer;color:var(--muted)}
.seg button[aria-pressed=true]{background:var(--accent);color:var(--accent-ink)}
.lb{display:flex;gap:12px;align-items:center;padding:11px 8px;border-bottom:1px solid var(--line)}.lb:last-child{border-bottom:0}
.lb .rk{font:500 15px var(--mono);width:26px}.lb .nm{flex:1;font-weight:600}.lb .xp{font:500 14px var(--mono)}
.lb.me{background:var(--accent-soft);border-radius:10px}
.miss{display:flex;gap:10px;align-items:center;margin-bottom:10px;flex-wrap:wrap}.miss>span:first-child{flex:1;min-width:150px}
.mini.wide{width:110px}
.chk{display:flex;gap:8px;align-items:center;font-size:14px;margin-bottom:12px}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);background:var(--accent);color:var(--accent-ink);padding:10px 18px;border-radius:100px;font-weight:600;font-size:14px;opacity:0;pointer-events:none;z-index:20;max-width:90vw}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media (prefers-reduced-motion:no-preference){.toast{transition:opacity .2s,transform .2s}}
.hero{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:24px;align-items:center;margin-bottom:18px}
.codecard{background:#000;border-radius:16px;padding:18px 20px;color:#c9d1e0;box-shadow:0 18px 40px -20px #10182b88}
.codecard .dts{display:flex;gap:6px;margin-bottom:14px}.codecard .dts i{width:9px;height:9px;border-radius:50%;background:#3a4262}
.codecard code{font:400 13px/1.8 var(--mono);display:block;overflow-wrap:anywhere}
.codecard .cm{color:#8a93ad}.codecard .kw{color:#e7a33e}.codecard .gn{color:#cfd6e6}
.cfoot{display:flex;justify-content:space-between;align-items:center;border-top:1px dashed #2a3150;margin-top:14px;padding-top:12px;font:400 11px var(--mono);color:#8a93ad;letter-spacing:.1em}
.astar{background:var(--hi);color:#10182b;font:700 18px var(--serif);border-radius:10px;padding:6px 14px;letter-spacing:0}
.sdots{display:flex;gap:6px;margin-top:8px}.sd{width:14px;height:14px;border-radius:50%;border:2px solid var(--line)}.sd.on{background:var(--hi);border-color:var(--hi)}
.gfx{display:block;max-width:100%}.gfx.radar{max-width:440px;margin:0 auto}
.donutrow{display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.course .donutrow{justify-content:flex-start;flex-wrap:nowrap}.course .donutrow h3{margin-bottom:4px}
.journey{display:flex;gap:0;overflow-x:auto;padding:10px 4px 6px}
.jn{background:none;border:0;cursor:pointer;display:grid;justify-items:center;gap:6px;position:relative;min-width:64px;color:var(--muted)}
.jn:before{content:"";position:absolute;top:15px;left:-50%;width:100%;height:3px;background:var(--line)}
.jn:first-child:before{display:none}
.jn.done:before,.jn.cur:before{background:var(--ink)}
.jn .nd{position:relative;z-index:1;width:32px;height:32px;border-radius:50%;border:3px solid var(--line);background:var(--surface);display:grid;place-items:center;font:600 11px var(--mono);color:var(--ink)}
.jn.done .nd{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.jn.cur .nd{border-color:var(--hi);background:var(--accent-soft)}
.jn .lb2{font:500 11px var(--mono)}
.jn:focus-visible{outline:2px solid var(--hi);outline-offset:2px}
.heat{display:grid;grid-template-columns:repeat(7,1fr);gap:5px;margin-bottom:10px;max-width:340px}
.heat .hd{font:400 10px var(--mono);color:var(--muted);text-align:center}
.heat i{aspect-ratio:1;border-radius:5px;background:var(--line)}
.heat i.h1{background:var(--hi);opacity:.35}.heat i.h2{background:var(--hi);opacity:.65}.heat i.h3{background:var(--hi)}
.bb{margin-bottom:14px}.bbh{display:flex;justify-content:space-between;gap:8px;margin-bottom:6px;font-weight:600;flex-wrap:wrap}
.cf{position:fixed;top:-12px;width:9px;height:14px;border-radius:2px;z-index:30;pointer-events:none;animation:cf 1.9s ease-in forwards}
@keyframes cf{to{transform:translate(var(--dx),105vh) rotate(540deg);opacity:.9}}
@media (prefers-reduced-motion:no-preference){
.bg{transform-box:fill-box;transform-origin:50% 100%;animation:grow .7s ease-out both}
@keyframes grow{from{transform:scaleY(0)}}
.arc{animation:sweep 1s ease-out both}
@keyframes sweep{from{stroke-dashoffset:1000}}
.ln{stroke-dasharray:900;animation:dash 1.1s ease-out both}
@keyframes dash{from{stroke-dashoffset:900}to{stroke-dashoffset:0}}
.rd{transform-box:fill-box;transform-origin:center;animation:pop .7s ease-out both}
@keyframes pop{from{transform:scale(.2);opacity:0}}
.course,.panel,.stat{transition:transform .15s,box-shadow .15s}
.course:hover{transform:translateY(-2px);box-shadow:0 10px 24px -16px #10182b66}}
.att{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.ac{border:1px solid var(--line);border-radius:12px;padding:10px 12px;display:grid;gap:2px}
.ac span{font-size:13px}.ac em{font:400 11px var(--mono);font-style:normal;color:var(--muted)}
.ac.P{background:var(--ink);color:var(--bg);border-color:var(--ink)}.ac.P em{color:inherit;opacity:.7}
.ac.L{background:var(--accent-soft);border-color:var(--hi)}
.ac.A{border-style:dashed;color:var(--warn)}
table.sm{min-width:0}
.mkin{max-width:110px;font-family:var(--mono)}
@media (max-width:860px){.hero{grid-template-columns:minmax(0,1fr)}}
@media (max-width:860px){
.app{grid-template-columns:1fr}
.rail{position:static;height:auto;flex-direction:row;flex-wrap:wrap;align-items:center;padding:12px max(16px,env(safe-area-inset-left,0px))}
.rail{border-right:0;border-bottom:1px solid var(--rail-line)}.rail .foot{display:none}.brand{padding:0 10px 0 0}.logo{width:130px}.brand small{display:none}.role{margin:0}.nav{display:flex;flex-wrap:wrap;width:100%}
main{padding:20px max(16px,env(safe-area-inset-right,0px)) 40px max(16px,env(safe-area-inset-left,0px))}
.two,.watch{grid-template-columns:minmax(0,1fr)}}
@media (prefers-reduced-motion:no-preference){.bar i{transition:width .3s}}
/* ===== Motion layer: aurora backdrop, glass cards, sliding nav, typed code, ticker, command palette ===== */
.aurora{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.aurora i{position:absolute;border-radius:50%;filter:blur(80px)}
.aurora i:nth-child(1){width:560px;height:560px;background:var(--hi);top:-200px;right:-140px;opacity:.22}
.aurora i:nth-child(2){width:520px;height:520px;background:#2b3a6b;bottom:-220px;left:18%;opacity:.14}
.aurora i:nth-child(3){width:320px;height:320px;background:var(--hi);top:42%;left:48%;opacity:.10}
.aurora::after{content:"";position:absolute;inset:0;background-image:radial-gradient(color-mix(in srgb,var(--ink) 13%,transparent) 1px,transparent 1.2px);background-size:24px 24px;-webkit-mask-image:linear-gradient(to bottom,#000 0%,transparent 75%);mask-image:linear-gradient(to bottom,#000 0%,transparent 75%)}
.app{position:relative;z-index:1}

.panel,.stat,.course{position:relative;isolation:isolate;background:var(--surface);background:color-mix(in srgb,var(--surface) 80%,transparent);-webkit-backdrop-filter:blur(14px) saturate(1.15);backdrop-filter:blur(14px) saturate(1.15);border-color:color-mix(in srgb,var(--line) 85%,transparent);box-shadow:0 1px 0 color-mix(in srgb,var(--surface) 60%,transparent) inset,0 12px 30px -24px #10182b55}
.panel::before,.stat::before,.course::before{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(380px circle at var(--mx,50%) var(--my,50%),color-mix(in srgb,var(--hi) 16%,transparent),transparent 62%);opacity:0;transition:opacity .35s;pointer-events:none;z-index:-1}
.panel:hover::before,.stat:hover::before,.course:hover::before{opacity:1}
.stat{transition:transform .25s cubic-bezier(.2,.7,.2,1),box-shadow .25s}
.stat:hover{transform:translateY(-3px);box-shadow:0 18px 34px -22px #10182b66}
.course{transition:transform .2s ease-out,box-shadow .25s;transform-style:preserve-3d}
.course:hover{box-shadow:0 24px 40px -26px #10182b77}

.rail{background:color-mix(in srgb,var(--rail) 86%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}
.navpill{position:absolute;left:0;top:0;border-radius:10px;background:var(--accent-soft);box-shadow:inset 3px 0 0 var(--hi);opacity:0;pointer-events:none;z-index:0;transition:transform .5s cubic-bezier(.3,1.35,.5,1),width .35s,height .35s,opacity .25s}
.nav{position:relative;z-index:1}
.nav a{width:auto;border-bottom:0!important;border-radius:10px;transition:color .2s,padding-left .25s}
.nav a:hover{padding-left:16px}
.nav a[aria-current=page]{color:var(--ink);font-weight:600;padding-left:16px}
.cmdk-btn{display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0 4px 12px;padding:8px 12px;border:1px solid var(--rail-line);border-radius:10px;background:var(--bg);color:var(--muted);cursor:pointer;font-size:14px}
.cmdk-btn:hover{border-color:var(--hi);color:var(--ink)}
kbd{font:500 11px var(--mono);border:1px solid var(--line);border-bottom-width:2px;border-radius:6px;padding:1px 6px;background:var(--surface);color:var(--muted)}

.eyebrow:after{content:"_";color:var(--hi);margin-left:2px}
.btn{position:relative;overflow:hidden;transition:transform .18s cubic-bezier(.2,.7,.2,1),box-shadow .25s,background .2s}
.btn:hover{transform:translateY(-1px);box-shadow:0 10px 22px -12px color-mix(in srgb,var(--ink) 80%,transparent)}
.btn:active{transform:translateY(0) scale(.97)}
.btn::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.32) 50%,transparent 70%);transform:translateX(-130%);pointer-events:none}
.btn.ghost::after{background:linear-gradient(110deg,transparent 30%,color-mix(in srgb,var(--hi) 30%,transparent) 50%,transparent 70%)}
.row{transition:background .2s,transform .2s,border-color .2s}
.row:hover{transform:translateX(4px)}
.opt{transition:transform .15s,background .2s,border-color .2s}
.opt:hover:not(:disabled){transform:translateY(-2px)}
.bdg{transition:transform .25s}
.bdg:not(.lock):hover{transform:translateY(-3px) rotate(-1deg)}

/* typed code card */
.codecard{position:relative;overflow:hidden}
.codecard::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:conic-gradient(from var(--ang,0deg),transparent 0 70%,var(--hi) 85%,transparent 100%);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask:linear-gradient(#000 0 0) content-box exclude,linear-gradient(#000 0 0);pointer-events:none}
.cl{display:block;white-space:pre;overflow:hidden;max-width:100%;width:calc(var(--n)*1ch)}
.caret{display:inline-block;width:.6ch;height:1.1em;background:var(--hi);vertical-align:-2px}
@property --ang{syntax:'<angle>';inherits:false;initial-value:0deg}

/* ticker */
.ticker{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:100px;background:color-mix(in srgb,var(--surface) 75%,transparent);margin-bottom:22px;padding:8px 0;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.tk-track{display:flex;gap:40px;width:max-content;font-size:13px;font-weight:500}
.tk-track span{display:inline-flex;align-items:center;gap:10px;white-space:nowrap}
.tk-track span::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--hi);box-shadow:0 0 0 4px color-mix(in srgb,var(--hi) 25%,transparent)}

/* command palette */
.cmdk[hidden],[hidden]{display:none!important}
.cmdk{position:fixed;inset:0;z-index:40;background:color-mix(in srgb,#10182b 45%,transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:grid;place-items:start center;padding:12vh max(16px,env(safe-area-inset-right,0px)) 16px max(16px,env(safe-area-inset-left,0px))}
.cmdk-box{width:min(600px,100%);background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 30px 80px -30px #10182b99;overflow:hidden}
.cmdk-box input{width:100%;border:0;border-bottom:1px solid var(--line);padding:16px 18px;font-size:16px;background:none;outline:none}
.cmdk-list{max-height:min(52vh,420px);overflow:auto;padding:6px}
.ck{display:grid;gap:1px;width:100%;text-align:left;border:0;background:none;padding:9px 12px;border-radius:10px;cursor:pointer}
.ck span{font-size:12px;color:var(--muted)}
.ck.on{background:var(--accent-soft);box-shadow:inset 3px 0 0 var(--hi)}
.cmdk-list .meta{padding:12px}
.cmdk-foot{font:400 11px var(--mono);color:var(--muted);padding:9px 14px;border-top:1px solid var(--line)}

.toast{transition:opacity .25s,transform .45s cubic-bezier(.34,1.56,.64,1)!important}

@media (prefers-reduced-motion:no-preference){
  .aurora i:nth-child(1){animation:drift1 24s ease-in-out infinite alternate}
  .aurora i:nth-child(2){animation:drift2 28s ease-in-out infinite alternate}
  .aurora i:nth-child(3){animation:drift3 20s ease-in-out infinite alternate}
  @keyframes drift1{to{transform:translate(-220px,160px) scale(1.15)}}
  @keyframes drift2{to{transform:translate(260px,-120px) scale(1.2)}}
  @keyframes drift3{to{transform:translate(-200px,-140px) scale(.85)}}
  .enter > *,.enter > .grid > *,.enter .hero > *{animation:rise .65s cubic-bezier(.2,.7,.2,1) backwards;animation-delay:calc(var(--i,0) * 60ms)}
  @keyframes rise{from{opacity:0;transform:translateY(18px) scale(.985);filter:blur(4px)}}
  .bar i,.mini i{animation:fill 1.1s cubic-bezier(.2,.7,.2,1) backwards;animation-delay:.25s}
  @keyframes fill{from{width:0}}
  .eyebrow:after{animation:blink 1s steps(1) infinite}
  .caret{animation:blink 1s steps(1) infinite}
  @keyframes blink{50%{opacity:0}}
  .btn:hover::after{transform:translateX(130%);transition:transform .7s ease}
  .codecard{animation:float 6s ease-in-out infinite}
  @keyframes float{50%{translate:0 -8px}}
  .codecard::before{animation:spin 6s linear infinite}
  @keyframes spin{to{--ang:360deg}}
  .cl{animation:type calc(var(--n) * 30ms) steps(var(--n)) backwards;animation-delay:calc(var(--d) * 420ms + 350ms)}
  @keyframes type{from{width:0}}
  .astar{animation:pop2 .6s cubic-bezier(.34,1.56,.64,1) 2.4s backwards}
  @keyframes pop2{from{transform:scale(.3) rotate(-12deg);opacity:0}}
  .tk-track{animation:tick 38s linear infinite}
  .ticker:hover .tk-track{animation-play-state:paused}
  @keyframes tick{to{transform:translateX(-50%)}}
  .jn.cur .nd{animation:pulse 1.8s ease-out infinite}
  @keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--hi) 60%,transparent)}100%{box-shadow:0 0 0 14px transparent}}
  .jn .nd{transition:transform .2s}.jn:hover .nd{transform:scale(1.15)}
  .heat i{animation:cell .5s cubic-bezier(.34,1.56,.64,1) backwards;animation-delay:calc(var(--k,0) * 18ms + .2s)}
  @keyframes cell{from{transform:scale(0)}}
  .sd.on{animation:cell .45s cubic-bezier(.34,1.56,.64,1) backwards}
  .sdots .sd:nth-child(2){animation-delay:.08s}.sdots .sd:nth-child(3){animation-delay:.16s}.sdots .sd:nth-child(4){animation-delay:.24s}.sdots .sd:nth-child(5){animation-delay:.32s}.sdots .sd:nth-child(6){animation-delay:.4s}.sdots .sd:nth-child(7){animation-delay:.48s}
  .cmdk:not([hidden]) .cmdk-box{animation:pop3 .3s cubic-bezier(.34,1.4,.64,1)}
  @keyframes pop3{from{transform:translateY(-12px) scale(.97);opacity:0}}
}
@media (max-width:860px){
  .rail{position:relative}
  .cmdk-btn{margin:0;order:2}
  .nav a:hover,.nav a[aria-current=page]{padding-left:12px}
  .navpill{box-shadow:inset 0 -3px 0 var(--hi)}
  .cmdk-btn kbd{display:none}
}

/* ===== portal additions ===== */
a.ck{color:inherit;text-decoration:none}
.toast.err{background:var(--warn);color:#fff}
a.row{color:inherit;text-decoration:none}
.row .num{font:500 12px var(--mono);color:var(--muted);min-width:34px}
.sec-title{font:500 11px var(--mono);text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin:16px 0 6px}
.sec-title:first-child{margin-top:0}
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:32px max(16px,env(safe-area-inset-right,0px)) 32px max(16px,env(safe-area-inset-left,0px));position:relative;z-index:1}
.login-card{width:min(420px,100%);padding:28px}
.login-card .logo{width:190px;margin:0 0 18px}
.err-box{background:var(--warn-soft);color:var(--warn);border-radius:10px;padding:10px 14px;font-size:14px;margin-bottom:14px;font-weight:500}
input[type=email],input[type=password],input[type=number],input[type=date]{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:9px 11px;width:100%}
.inline{display:inline}
.edit{border-top:1px solid var(--line)}
.edit summary{list-style:none;cursor:pointer;display:flex;gap:10px;align-items:center;padding:10px 0}
.edit summary::-webkit-details-marker{display:none}
.edit summary .t{flex:1;min-width:0;overflow-wrap:anywhere}
.edit[open] summary{color:var(--ink)}
.edit .body{padding:4px 0 14px;display:grid;gap:10px}
.edit .row2{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,2fr) auto;gap:10px;align-items:end}
.tag{display:inline-block;font:500 11px var(--mono);padding:1px 8px;border-radius:99px;background:var(--ok-soft);color:var(--muted)}
.tag.warn{background:var(--warn-soft);color:var(--warn)}
.grid-en th.c{writing-mode:vertical-rl;transform:rotate(180deg);text-transform:none;letter-spacing:0;font:500 12px var(--sans);max-height:180px;white-space:normal;padding:8px 6px}
.grid-en td.c{text-align:center}
.grid-en input[type=checkbox]{width:18px;height:18px;accent-color:var(--hi)}
.stick{position:sticky;bottom:12px;z-index:5;display:flex;justify-content:flex-end;margin-top:12px}
.player iframe{width:100%;height:100%;border:0;border-radius:12px}
.lesson-nav{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:14px}
.notes-text{white-space:pre-line;color:var(--muted);font-size:14px}
.userbox{font-size:13px;padding:10px;display:grid;gap:6px;border-top:1px solid var(--rail-line);margin-top:10px}
.userbox b{color:var(--ink)}
.linkbtn{background:none;border:0;padding:0;color:var(--muted);text-decoration:underline;cursor:pointer;font-size:13px;text-align:left}
@media (max-width:860px){.edit .row2{grid-template-columns:1fr}.userbox{display:none}}
.role .rb{border:0;background:none;color:var(--rail-ink);padding:7px;border-radius:100px;font-weight:600;text-align:center;text-decoration:none}
.role .rb[aria-pressed=true]{background:var(--accent);color:var(--accent-ink)}
a.brand{display:block;text-decoration:none}