:root{--bg:#060807;--panel:#0d110e;--panel2:#131a15;--line:#233025;--text:#eef1e8;--mut:#93a08c;--a1:#d4af37;--a2:#2ecc71;--grad:linear-gradient(120deg,var(--a1),var(--a2));--ok:#2ecc71;--warn:#e0a526;--err:#ff6174;--r:16px;--shadow:0 20px 60px rgba(0,0,0,.55);--on-accent:#0a0c09;color-scheme:dark}
:root[data-theme=light]{--bg:#f6f7f1;--panel:#ffffff;--panel2:#eef2e8;--line:#d9dfd0;--text:#10150f;--mut:#566052;--a1:#9a7b12;--a2:#16803c;--shadow:0 20px 50px rgba(20,40,20,.12);--on-accent:#ffffff;color-scheme:light}
@media (prefers-color-scheme:light){:root:not([data-theme=dark]){--bg:#f6f7f1;--panel:#ffffff;--panel2:#eef2e8;--line:#d9dfd0;--text:#10150f;--mut:#566052;--a1:#9a7b12;--a2:#16803c;--shadow:0 20px 50px rgba(20,40,20,.12);--on-accent:#ffffff;color-scheme:light}}
*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:var(--bg);color:var(--text);font:15px/1.55 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;background:radial-gradient(900px 500px at 85% -10%,rgba(212,175,55,.16),transparent),radial-gradient(700px 500px at -10% 110%,rgba(46,204,113,.12),transparent);pointer-events:none;z-index:0}
#app{position:relative;z-index:1;display:grid;grid-template-columns:84px 1fr;min-height:100%}
.rail{position:sticky;top:0;height:100vh;display:flex;flex-direction:column;align-items:center;gap:6px;padding:16px 8px;border-right:1px solid var(--line);background:color-mix(in srgb,var(--panel) 80%,transparent);backdrop-filter:blur(14px)}
.logo{width:44px;height:44px;border-radius:14px;background:var(--grad);display:grid;place-items:center;font-weight:800;color:var(--on-accent);margin-bottom:12px;box-shadow:0 8px 24px rgba(212,175,55,.35)}
.nav{width:64px;padding:10px 0 8px;border-radius:14px;color:var(--mut);text-align:center;font-size:11px;cursor:pointer;border:0;background:none;transition:.15s}
.nav svg{display:block;margin:0 auto 4px;width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.nav:hover{background:var(--panel2);color:var(--text)}.nav.on{background:var(--panel2);color:var(--text);box-shadow:inset 0 0 0 1px var(--line)}.nav.on svg{stroke:url(#g)}
.spacer{flex:1}
main{padding:22px clamp(16px,3vw,40px) 60px;max-width:1500px;width:100%;min-width:0;box-sizing:border-box;margin:0 auto}
.top{display:flex;align-items:center;gap:12px;margin-bottom:18px;flex-wrap:wrap}.top h1{font-size:22px;margin:0;letter-spacing:-.01em}.top .sub{color:var(--mut)}
.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:99px;background:var(--panel2);border:1px solid var(--line);font-size:12px;color:var(--mut)}.dot{width:8px;height:8px;border-radius:50%;background:var(--mut)}.dot.ok{background:var(--ok);box-shadow:0 0 10px var(--ok)}.dot.bad{background:var(--err)}
.grow{flex:1}
.btn{border:1px solid var(--line);background:var(--panel2);color:var(--text);padding:9px 14px;border-radius:12px;cursor:pointer;font:inherit;transition:.15s}.btn:hover{border-color:#3a4260;transform:translateY(-1px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn.primary{background:var(--grad);border:0;color:var(--on-accent);font-weight:700;padding:12px 22px;box-shadow:0 10px 30px rgba(212,175,55,.3)}.btn.small{padding:5px 10px;font-size:13px;border-radius:10px}.btn.ghost{background:none}
.goals{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:12px;margin-bottom:16px}
.goal{position:relative;overflow:hidden;text-align:left;border:1px solid var(--line);background:var(--panel);border-radius:var(--r);padding:16px 16px 14px;cursor:pointer;color:var(--text);transition:.2s;font:inherit}
.goal::after{content:"";position:absolute;inset:0;background:var(--grad);opacity:0;transition:.2s}.goal:hover{transform:translateY(-2px);border-color:#3a4260}.goal.on{border-color:transparent;box-shadow:0 0 0 2px var(--a1),var(--shadow)}.goal.on::after{opacity:.09}
.goal b{display:block;font-size:17px}.goal span{color:var(--mut);font-size:13px}.goal i{font-style:normal;font-size:11px;display:inline-block;margin-top:9px;color:var(--mut);border:1px solid var(--line);padding:1px 8px;border-radius:99px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:16px}
.stage{min-height:min(60vh,560px);display:grid;place-items:center;border-radius:var(--r);background:var(--panel);border:1px solid var(--line);overflow:hidden;position:relative}
.stage img,.stage video{max-width:100%;max-height:68vh;display:block;border-radius:10px}
.empty{text-align:center;color:var(--mut);padding:30px;max-width:460px}.empty h2{color:var(--text);margin:0 0 6px}
.shimmer{position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(212,175,55,.12) 50%,transparent 70%);background-size:220% 100%;animation:sh 1.6s linear infinite}@keyframes sh{to{background-position:-220% 0}}
.run{position:relative;text-align:center}.run b{font-size:34px;font-variant-numeric:tabular-nums;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.run small{display:block;color:var(--mut)}
.composer{margin-top:14px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:12px;box-shadow:var(--shadow)}
textarea,input[type=text],input[type=search]{width:100%;background:var(--panel2);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:12px 14px;font:inherit;resize:vertical}textarea:focus,input:focus{outline:2px solid var(--a1);outline-offset:1px}
textarea{min-height:84px}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:10px}
.chip{padding:6px 12px;border-radius:99px;border:1px solid var(--line);background:var(--panel2);color:var(--mut);cursor:pointer;font:inherit;font-size:13px}.chip.on{color:var(--on-accent);font-weight:600;border-color:transparent;background:var(--grad)}.chip:hover:not(.on){color:var(--text)}
label.lbl{font-size:12px;color:var(--mut);margin-right:2px}
.kv{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:13px}.kv dt{color:var(--mut)}.kv dd{margin:0;word-break:break-word}
.side h3,.card h3{margin:0 0 10px;font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--mut)}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:8px}.thumb{aspect-ratio:1;border-radius:12px;overflow:hidden;background:var(--panel2);border:1px solid var(--line);cursor:pointer;position:relative}.thumb img,.thumb video{width:100%;height:100%;object-fit:cover;display:block}.thumb:hover{border-color:var(--a1)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.course{cursor:pointer;transition:.15s;display:flex;flex-direction:column;gap:6px}.course:hover{transform:translateY(-2px);border-color:#3a4260}.course .code{font-size:12px;color:var(--a2);font-weight:700;letter-spacing:.06em}.course h4{margin:0;font-size:16px}.course p{margin:0;color:var(--mut);font-size:13px}.course .by{font-size:12px;color:var(--mut);margin-top:auto}
.tabs{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap}
.lvl{display:flex;align-items:baseline;gap:12px;margin:22px 0 10px}.lvl h2{margin:0;font-size:26px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.lvl span{color:var(--mut)}
.md{max-width:820px}.md h1{font-size:30px;line-height:1.2;letter-spacing:-.02em}.md h2{margin-top:30px;font-size:21px}.md h3{font-size:17px}.md p,.md li{color:color-mix(in srgb,var(--text) 92%,transparent)}
.md code{background:var(--panel2);padding:1px 6px;border-radius:6px;font:13px ui-monospace,SFMono-Regular,Menlo,monospace}.md pre{background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:14px;overflow:auto}.md pre code{background:none;padding:0}
.md table{border-collapse:collapse;width:100%;font-size:14px;display:block;overflow:auto}.md th,.md td{border:1px solid var(--line);padding:6px 10px;text-align:left}.md th{background:var(--panel2)}.md blockquote{margin:12px 0;padding:6px 14px;border-left:3px solid var(--warn);background:var(--panel2);border-radius:0 10px 10px 0;color:var(--mut)}
.md a{color:var(--a2)}
.q{margin:12px 0;padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.q.ok{border-color:var(--ok)}.q.no{border-color:var(--err)}.opt{display:block;width:100%;text-align:left;margin:6px 0;padding:9px 12px;border-radius:10px;border:1px solid var(--line);background:var(--panel2);color:var(--text);cursor:pointer;font:inherit}.opt:hover{border-color:var(--a1)}
.graphbox{overflow:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--panel);padding:10px;max-height:70vh}
.gn rect{fill:var(--panel2);stroke:var(--line)}.gn text{fill:var(--text);font:600 12px ui-sans-serif,system-ui}.gn .sub{fill:var(--mut);font:400 10.5px ui-monospace,monospace}.gw{fill:none;stroke:url(#g);stroke-width:1.6;opacity:.7}
.modal{position:fixed;inset:0;background:rgba(5,7,12,.82);backdrop-filter:blur(8px);z-index:50;display:grid;place-items:center;padding:20px}.modal .box{max-width:min(1100px,100%);max-height:100%;overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:16px;box-shadow:var(--shadow)}.modal img,.modal video{max-width:100%;max-height:70vh;border-radius:12px;display:block;margin:0 auto 12px}
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);background:var(--panel);border:1px solid var(--err);color:var(--text);padding:10px 16px;border-radius:12px;z-index:60;box-shadow:var(--shadow);max-width:90vw}
.warn{border-color:var(--warn);color:var(--warn)}.small{font-size:13px;color:var(--mut)}a{color:var(--a2)}
@media (max-width:900px){#app{grid-template-columns:1fr}.rail{position:fixed;top:auto;bottom:0;left:0;right:0;height:auto;flex-direction:row;justify-content:space-around;padding:6px;border-right:0;border-top:1px solid var(--line);z-index:40}.logo,.spacer{display:none}.nav{width:auto;flex:1;padding:6px 0;font-size:10px}main{padding-bottom:96px}.layout{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media (max-width:900px){.rail{overflow-x:auto}.nav{min-width:60px}}

/* ---- spectacle layer: all progressive enhancement, all off under reduced motion ---- */
h1,.empty h2,.lvl h2,.md h1,.md h2,.course h4{font-family:"Iowan Old Style","Palatino Linotype",Palatino,"Book Antiqua",Georgia,serif;letter-spacing:-.012em}
.top h1{font-size:clamp(26px,3vw,36px);background:linear-gradient(100deg,var(--text) 30%,var(--a1));-webkit-background-clip:text;background-clip:text;color:transparent}
.rail{backdrop-filter:blur(18px) saturate(1.5)}.composer{background:color-mix(in srgb,var(--panel) 80%,transparent);backdrop-filter:blur(16px) saturate(1.4);border-color:color-mix(in srgb,var(--a1) 22%,var(--line))}
.card,.goal,.thumb{transition:border-color .2s,transform .2s,box-shadow .2s}.card:hover,.goal:hover,.thumb:hover{border-color:color-mix(in srgb,var(--a1) 55%,var(--line));box-shadow:0 10px 40px rgba(212,175,55,.08)}
.btn.primary{position:relative;overflow:hidden}.btn.primary::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);transform:translateX(-120%);transition:transform .6s}.btn.primary:hover::after{transform:translateX(120%)}
:focus-visible{outline:2px solid var(--a1);outline-offset:3px;border-radius:10px}
.ring{width:112px;height:112px;margin:0 auto 12px;border-radius:50%;background:conic-gradient(from 0turn,var(--a1),var(--a2),transparent 72%);-webkit-mask:radial-gradient(circle 50px,transparent 97%,#000 100%);mask:radial-gradient(circle 50px,transparent 97%,#000 100%);animation:spin 1.3s linear infinite}
@keyframes spin{to{transform:rotate(1turn)}}
@keyframes drift{0%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(-2%,1.5%,0) scale(1.06)}100%{transform:translate3d(0,0,0) scale(1)}}
@keyframes rise{from{opacity:0;transform:translateY(18px) scale(.985)}to{opacity:1;transform:none}}
@keyframes vt-in{from{opacity:0;transform:translateY(10px)}}@keyframes vt-out{to{opacity:0;transform:translateY(-6px)}}
@media (prefers-reduced-motion:no-preference){
  body::before{animation:drift 26s ease-in-out infinite;will-change:transform}
  ::view-transition-old(root){animation:.16s ease-in both vt-out}::view-transition-new(root){animation:.3s ease-out both vt-in}
  @supports (animation-timeline:view()){.card,.goal,.thumb{animation:rise linear both;animation-timeline:view();animation-range:entry 0% cover 28%}}
}

/* ---- 3D layer ---- */
main{position:relative}.hero3d{position:absolute;top:-8px;right:0;width:min(440px,50vw);height:140px;pointer-events:none;z-index:0;opacity:.95;-webkit-mask-image:radial-gradient(closest-side,#000 55%,transparent);mask-image:radial-gradient(closest-side,#000 55%,transparent)}.hero3d canvas{width:100%;height:100%;display:block}
.top,.goals,.layout{position:relative;z-index:1}
@media (max-width:700px){.hero3d{display:none}}
.tilt3d{transform:perspective(900px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transform-style:preserve-3d;transition:transform .12s ease-out,border-color .2s,box-shadow .2s;position:relative}
.tilt3d::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;opacity:calc(var(--gl,0)*.9);background:radial-gradient(260px circle at var(--gx,50%) var(--gy,50%),rgba(255,224,138,.18),transparent 62%);transition:opacity .2s}
.goal.tilt3d>*,.card.tilt3d>*{transform:translateZ(18px)}
/* Prime dock */
.prime{position:fixed;right:18px;bottom:18px;z-index:45;font-family:inherit}.orb{width:62px;height:62px;border:0;border-radius:50%;cursor:pointer;position:relative;background:radial-gradient(circle at 32% 28%,#fff6c9 0,var(--a1) 34%,var(--a2) 78%,#0a3d22 100%);box-shadow:0 10px 36px rgba(212,175,55,.35),inset -6px -8px 16px rgba(0,0,0,.35);animation:bob 4.2s ease-in-out infinite}
.orb::after{content:"";position:absolute;inset:-7px;border-radius:50%;border:1.5px solid color-mix(in srgb,var(--a2) 70%,transparent);animation:pulse 2.6s ease-out infinite}.orb.talk::after{animation-duration:1s}
@keyframes bob{50%{transform:translateY(-5px)}}@keyframes pulse{from{transform:scale(.92);opacity:.9}to{transform:scale(1.28);opacity:0}}
.pp{position:absolute;right:0;bottom:78px;width:min(380px,calc(100vw - 28px));max-height:min(560px,72vh);display:flex;flex-direction:column;background:color-mix(in srgb,var(--panel) 86%,transparent);backdrop-filter:blur(18px) saturate(1.5);border:1px solid color-mix(in srgb,var(--a1) 30%,var(--line));border-radius:20px;box-shadow:var(--shadow);overflow:hidden;transform-origin:bottom right;animation:rise .25s ease-out both}
.pp header{display:flex;align-items:center;gap:10px;padding:12px 14px;border-bottom:1px solid var(--line)}.pp header b{font-family:"Iowan Old Style",Palatino,Georgia,serif;font-size:17px}.pp .msgs{overflow:auto;padding:12px 14px;display:flex;flex-direction:column;gap:9px}
.msg{max-width:88%;padding:9px 12px;border-radius:14px;font-size:14px;line-height:1.45}.msg.bot{background:var(--panel2);border:1px solid var(--line);align-self:flex-start}.msg.me{background:var(--grad);color:var(--on-accent);align-self:flex-end;font-weight:500}
.pp form{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line)}.pp input{flex:1}
.tour-overlay{position:fixed;inset:0;z-index:70}.tour-overlay.dim{background:rgba(5,7,12,.62)}.tour-spotlight{position:fixed;border-radius:14px;box-shadow:0 0 0 9999px rgba(5,7,12,.62);border:2px solid var(--a1);pointer-events:none;transition:top .2s,left .2s,width .2s,height .2s}
.tour-card{position:fixed;left:50%;bottom:64px;transform:translateX(-50%);box-sizing:border-box;width:min(460px,calc(100vw - 32px));max-height:calc(100vh - 96px);overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
.tour-header{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--mut)}.tour-name{color:var(--a1);font-weight:700}.tour-title{margin:8px 0 6px;font-size:18px;color:var(--text)}.tour-text{margin:0;color:var(--text);line-height:1.45;font-size:14px}
.tour-dots{display:flex;gap:6px;margin:12px 0}.tour-dot{width:7px;height:7px;border-radius:50%;background:var(--line)}.tour-dot.on{background:var(--a1)}.tour-actions{display:flex;justify-content:flex-end;gap:8px}
.palette-overlay{position:fixed;inset:0;z-index:70;background:rgba(5,7,12,.7);backdrop-filter:blur(6px);display:flex;justify-content:center;align-items:flex-start;padding:12vh 16px 16px;box-sizing:border-box}
.palette-modal{width:min(560px,100%);max-height:100%;overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.palette-input{display:block;box-sizing:border-box;width:100%;padding:14px 16px;font:inherit;font-size:16px;color:var(--text);background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;outline:0}
.palette-list{list-style:none;margin:0;padding:6px}.palette-item{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:9px 10px;border-radius:10px;cursor:pointer;color:var(--text);font-size:14px}.palette-item:hover,.palette-item.active{background:var(--panel2)}.palette-hint{flex:none;max-width:45%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px;color:var(--mut)}