/* MemeRadar Academy — design system
   Premium fintech × space observatory × modern education.
   Dark by design: near-black grounds, off-white type, restrained amber and cyan accents. */
:root{
  --bg:#07090c; --bg2:#0a0d11; --panel:#0f1318; --panel2:#151a21; --raise:#1a2029;
  --line:#232b36; --line2:#1a2029; --fg:#e8eaed; --fg2:#c3c9d2; --mute:#8b95a3; --dim:#5f6977;
  --amber:#d4a24c; --amber-hi:#e2b566; --amber-ink:#17120a; --amber-soft:rgba(212,162,76,.12);
  --cyan:#6cc4d1; --cyan-soft:rgba(108,196,209,.1);
  --good:#4caf87; --good-soft:rgba(76,175,135,.12); --warn:#d9a441; --warn-soft:rgba(217,164,65,.1); --bad:#e07070; --bad-soft:rgba(224,112,112,.1);
  --accent:#6cc4d1; --coral:#d4a24c; --gl-line:#566273; --brand:#d4a24c; --glow:rgba(0,0,0,.35);
  --f-body:"Instrument Sans","Segoe UI",system-ui,-apple-system,Roboto,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r:10px; --r-sm:7px;
  --t-micro:180ms; --t-page:420ms; --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 var(--f-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
::selection{background:rgba(212,162,76,.3)}
a{color:var(--cyan);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#8fd6e0}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:4px}
.wrap{max-width:1120px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:var(--panel);padding:8px 12px;z-index:50}
h1,h2,h3{font-family:var(--f-body);text-wrap:balance;color:var(--fg)}
h1{font-weight:600;font-size:clamp(30px,4.2vw,48px);line-height:1.08;letter-spacing:-.032em;margin:0 0 14px}
h2{font-weight:600;font-size:clamp(20px,2.2vw,26px);line-height:1.2;letter-spacing:-.02em;margin:0 0 12px}
h3{font-weight:600;font-size:18px;letter-spacing:-.01em;margin:22px 0 8px}
p{margin:0 0 14px}
.lead{font-size:18px;color:var(--fg2);max-width:58ch;line-height:1.6}
.hint{font-size:13.5px;color:var(--mute)}
.eyebrow,.label{font:500 11px/1.2 var(--f-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--mute)}
.eyebrow b{color:var(--amber);font-weight:500}
code{font-family:var(--f-mono);font-size:.92em}

/* ---------- header ---------- */
header.top{position:sticky;top:0;z-index:20;background:rgba(7,9,12,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line2);padding-top:env(safe-area-inset-top,0px)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-block:13px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:-.01em;font-size:15px;color:var(--fg);text-decoration:none;white-space:nowrap}
.brand svg{width:24px;height:24px;flex:none}
.brand span{color:var(--mute);font-weight:500}
.hdr-r{display:flex;align-items:center;gap:10px;min-width:0}
.stats{display:flex;gap:8px;align-items:center;flex-wrap:nowrap;font-size:13px}
.chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);color:var(--fg2);padding:4px 10px;border-radius:999px;white-space:nowrap;font:500 11.5px/1.3 var(--f-mono);background:transparent}
.chip.bump{animation:bump .5s var(--ease)}
@keyframes bump{40%{transform:scale(1.08);border-color:var(--amber)}}
.sync{display:inline-flex;align-items:center;gap:6px;font:500 11px var(--f-mono);color:var(--mute);white-space:nowrap}
.sync::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--good)}
.sync.saving::before{background:var(--amber);animation:blink 1s infinite}
.sync.err::before{background:var(--bad)}
@keyframes blink{50%{opacity:.3}}
.avatar{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--panel2);border:1px solid var(--line);font:600 12px var(--f-body);color:var(--fg2);text-decoration:none}

/* ---------- buttons (micro interactions) ---------- */
.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--r-sm);background:var(--fg);color:#0a0c10;font:600 15px/1 var(--f-body);letter-spacing:-.005em;padding:13px 20px;cursor:pointer;text-decoration:none;transition:transform var(--t-micro) var(--ease),background-color var(--t-micro),border-color var(--t-micro),color var(--t-micro),box-shadow var(--t-micro);will-change:transform}
.btn:hover{background:#fff;color:#0a0c10}
.btn:active{transform:translateY(1px) scale(.985)}
.btn.primary{background:var(--amber);color:var(--amber-ink)}
.btn.primary:hover{background:var(--amber-hi);box-shadow:0 8px 28px -12px rgba(212,162,76,.55)}
.btn.ghost{background:transparent;color:var(--fg);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--mute);background:rgba(255,255,255,.03)}
.btn.sm{padding:9px 14px;font-size:14px}
.btn.lg{padding:17px 26px;font-size:16px;letter-spacing:.01em}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn .arr{transition:transform var(--t-micro) var(--ease)}
.btn:hover .arr{transform:translateX(3px)}
.linkbtn{background:none;border:0;padding:0;color:var(--cyan);font:inherit;cursor:pointer;text-decoration:underline;text-underline-offset:3px}

/* ---------- forms ---------- */
label{display:block;font-weight:500;font-size:14px;margin:16px 0 6px;color:var(--fg2)}
input[type=text],input[type=email],select{width:100%;padding:13px 14px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--bg2);color:var(--fg);font:inherit;transition:border-color var(--t-micro),box-shadow var(--t-micro)}
input[type=text]:focus,input[type=email]:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px rgba(212,162,76,.15)}
input[aria-invalid="true"]{border-color:var(--bad)}
.ferr{color:var(--bad);font-size:13px;margin-top:6px}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}
@media (max-width:560px){.frow{grid-template-columns:1fr}}

/* ---------- surfaces ---------- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--r)}
.callout{background:var(--cyan-soft);border:1px solid rgba(108,196,209,.22);padding:13px 16px;border-radius:var(--r-sm);margin:16px 0}
.callout.warn{background:var(--warn-soft);border-color:rgba(217,164,65,.28)}
.callout.err{background:var(--bad-soft);border-color:rgba(224,112,112,.3)}
.callout.ok{background:var(--good-soft);border-color:rgba(76,175,135,.3)}
main{min-height:70vh}
main.pad{padding-block:34px 70px}

/* ---------- landing ---------- */
.land{position:relative;isolation:isolate}
.land-hero{position:relative;min-height:min(860px,100svh);display:flex;align-items:center;padding-block:40px 60px;overflow:hidden}
.earth{position:absolute;inset:0;z-index:-1}
.earth canvas{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:0;transition:opacity 1.2s ease}
.earth.earth-ready canvas{opacity:1}
.earth.earth-fallback::after{content:"";position:absolute;width:min(62vh,520px);aspect-ratio:1;right:6%;top:50%;transform:translateY(-50%);border-radius:50%;background:radial-gradient(circle at 32% 38%,rgba(255,255,255,.12),transparent 42%),radial-gradient(circle at 70% 60%,rgba(0,0,0,.85),transparent 60%),var(--fallback-tex,#173052) center/cover;box-shadow:0 0 60px -10px rgba(80,140,255,.35),inset -40px -20px 80px rgba(0,0,0,.8)}
.land-hero::after{content:"";position:absolute;inset:auto 0 0 0;height:160px;background:linear-gradient(transparent,var(--bg));z-index:-1;pointer-events:none}
.land-copy{max-width:520px;position:relative}
.land-copy h1{font-size:clamp(34px,5vw,60px);margin:18px 0 18px}
.price{display:flex;align-items:baseline;gap:12px;margin:26px 0 20px}
.price b{font:600 34px/1 var(--f-body);letter-spacing:-.03em}
.price span{color:var(--mute);font-size:14px}
.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px 20px}
.trust{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:22px;color:var(--mute);font-size:13px}
.trust span{display:inline-flex;align-items:center;gap:7px}
.trust svg{width:14px;height:14px;flex:none;color:var(--fg2)}
.coord{position:absolute;right:max(20px,env(safe-area-inset-right,0px));bottom:28px;font:500 10.5px/1.6 var(--f-mono);letter-spacing:.12em;color:var(--dim);text-align:right;pointer-events:none}
.sec{padding-block:72px;border-top:1px solid var(--line2)}
.sec-h{display:flex;align-items:baseline;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:28px}
.sec-h h2{margin:0}
.gets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line2);border:1px solid var(--line2);border-radius:var(--r);overflow:hidden}
.gets>div{background:var(--bg2);padding:24px 22px;min-width:0}
.gets svg{width:22px;height:22px;color:var(--amber);margin-bottom:14px}
.gets b{display:block;font-weight:600;margin-bottom:4px}
.gets span{color:var(--mute);font-size:14.5px}
.outline{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 40px;padding:0;margin:0}
.outline li{list-style:none;display:grid;grid-template-columns:40px 1fr auto;gap:12px;align-items:baseline;padding:14px 0;border-bottom:1px solid var(--line2)}
.outline .n{font:500 12px var(--f-mono);color:var(--dim)}
.outline .tt{font-weight:500}
.outline .tm{font:500 11.5px var(--f-mono);color:var(--mute)}
.outline-meta{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:22px;color:var(--mute);font-size:14px}
.outline-meta b{color:var(--fg);font-weight:600}
.signin-box{max-width:460px}
.fee{max-width:70ch;color:var(--dim);font-size:12.5px;line-height:1.6;margin-top:28px}
.facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.fact{padding:18px 20px;border:1px solid var(--line2);border-radius:var(--r);background:var(--bg2)}
.fact b{display:block;margin-bottom:4px;font-weight:600}
.fact span{color:var(--mute);font-size:14.5px}
.land-ui{transition:opacity .45s ease,transform .6s var(--ease)}
.land.leaving .land-ui{opacity:0;transform:scale(.985)}

/* ---------- onboarding / welcome / complete ---------- */
.center-stage{min-height:calc(100svh - 64px);display:grid;place-items:center;padding-block:40px;position:relative;isolation:isolate;overflow:hidden}
.center-stage .earth{position:absolute;inset:0;z-index:-1}
.stage-card{width:100%;max-width:560px}
.welcome-h{font:600 clamp(34px,6vw,64px)/1.02 var(--f-body);letter-spacing:-.035em;text-transform:uppercase;margin:12px 0 18px}
.keybox{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--bg2);margin:18px 0}
.keybox code{font:500 17px var(--f-mono);letter-spacing:.08em;color:var(--fg);user-select:all}
.keybox .hint{flex-basis:100%;margin:0}
.ov{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line2);border:1px solid var(--line2);border-radius:var(--r);overflow:hidden;margin:24px 0}
.ov>div{background:var(--panel);padding:16px}
.ov b{display:block;font:600 24px/1.1 var(--f-body);letter-spacing:-.02em}
.ov span{font-size:13px;color:var(--mute)}
@media (max-width:560px){.ov{grid-template-columns:1fr 1fr}.ov>div:last-child{grid-column:1/-1}}

/* ---------- dashboard ---------- */
.dash-top{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:28px;align-items:stretch;margin-bottom:28px}
.resume{padding:28px;display:flex;flex-direction:column;gap:6px;position:relative;overflow:hidden}
.resume::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;border:1px solid var(--line);box-shadow:0 0 0 30px rgba(255,255,255,.012),0 0 0 60px rgba(255,255,255,.01);pointer-events:none}
.resume h1{font-size:clamp(28px,3.6vw,40px);margin:6px 0 4px}
.resume .where{color:var(--fg2);margin-bottom:18px}
.resume .where b{color:var(--fg)}
.resume .btn{align-self:flex-start}
.ringbox{display:flex;align-items:center;gap:22px;padding:24px}
.ring{--p:0;width:118px;height:118px;flex:none;border-radius:50%;background:conic-gradient(var(--amber) calc(var(--p)*1%),var(--line) 0);display:grid;place-items:center;position:relative}
.ring::before{content:"";position:absolute;inset:7px;border-radius:50%;background:var(--panel)}
.ring b{position:relative;font:600 26px var(--f-body);letter-spacing:-.03em}
.ring small{position:relative;display:block;font:500 10px var(--f-mono);letter-spacing:.12em;color:var(--mute);text-align:center;margin-top:-4px}
.kpis{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line2);border:1px solid var(--line2);border-radius:var(--r);overflow:hidden;margin-bottom:34px}
.kpis>div{background:var(--panel);padding:16px 18px;min-width:0}
.kpis b{display:block;font:600 22px/1.15 var(--f-body);letter-spacing:-.02em;margin-top:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chlist{border:1px solid var(--line2);border-radius:var(--r);overflow:hidden}
.chrow{display:grid;grid-template-columns:44px minmax(0,1fr) 150px 110px;gap:16px;align-items:center;padding:16px 18px;border-top:1px solid var(--line2);background:var(--panel);text-decoration:none;color:var(--fg);transition:background-color var(--t-micro)}
.chrow:first-child{border-top:0}
a.chrow:hover{background:var(--panel2);color:var(--fg)}
.chrow .n{font:500 12px var(--f-mono);color:var(--dim)}
.chrow .t{font-weight:500;min-width:0}
.chrow .t small{display:block;color:var(--mute);font-size:13px;font-weight:400;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chrow .st{font:500 11px var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--mute);text-align:right}
.chrow.done .st{color:var(--good)}
.chrow.cur .st{color:var(--amber)}
.chrow.lock{opacity:.55;cursor:default}
.pbar{height:4px;border-radius:4px;background:var(--line);overflow:hidden}
.pbar i{display:block;height:100%;background:var(--fg2);border-radius:4px;transition:width .6s var(--ease)}
.chrow.done .pbar i{background:var(--good)}
.chrow.cur .pbar i{background:var(--amber)}
@media (max-width:860px){.dash-top{grid-template-columns:1fr}.kpis{grid-template-columns:1fr 1fr}.chrow{grid-template-columns:34px minmax(0,1fr) 84px}.chrow .pbar{display:none}}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.badge{border:1px solid var(--line2);border-radius:var(--r-sm);padding:12px 14px;background:var(--bg2);font-size:13px;color:var(--mute)}
.badge b{display:block;color:var(--fg);font-size:14px;font-weight:600}
.badge.off{opacity:.45}.badge.on{border-color:rgba(212,162,76,.35)}
.badge .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--line);margin-right:7px;vertical-align:1px}.badge.on .dot{background:var(--amber)}
.sect{margin-top:40px}
details.more{margin-top:40px;border-top:1px solid var(--line2);padding-top:18px}
details.more summary{cursor:pointer;color:var(--fg2);font-weight:500}

/* ---------- chapter layout ---------- */
.chhead{display:flex;align-items:center;gap:22px;margin:0 0 26px;padding:16px 20px 16px 14px;border:1px solid var(--line2);border-radius:var(--r);background:var(--panel)}
.chh-t{min-width:0}
.crumbs{font-size:13px;color:var(--mute);margin-bottom:4px}.crumbs a{color:var(--mute);text-decoration:none}.crumbs a:hover{color:var(--fg)}
.chtitle{font-size:clamp(20px,2.4vw,28px);margin:0 0 8px}
.chmeta{display:flex;flex-wrap:wrap;gap:6px 16px;font:500 10.5px/1 var(--f-mono);letter-spacing:.12em;color:var(--mute);text-transform:uppercase}
.emb{flex:none;width:112px;height:112px;position:relative}
.emb canvas{position:absolute;inset:-12px;width:calc(100% + 24px);height:calc(100% + 24px);display:block}
.emb.noemb{display:none}
.chlayout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:40px;align-items:start}
.steps{position:sticky;top:84px;list-style:none;margin:0;padding:0;display:grid;gap:2px}
.steps button{width:100%;text-align:left;display:flex;gap:10px;align-items:center;background:none;border:0;border-radius:var(--r-sm);padding:9px 10px;font:500 14px var(--f-body);color:var(--mute);cursor:pointer;transition:background-color var(--t-micro),color var(--t-micro)}
.steps button:hover:not(:disabled){background:var(--panel);color:var(--fg2)}
.steps button:disabled{opacity:.4;cursor:not-allowed}
.steps .dot{flex:none;width:18px;height:18px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;font-size:10px;color:var(--bg)}
.steps .done .dot{background:var(--good);border-color:var(--good)}
.steps .cur{background:var(--panel);color:var(--fg)}
.steps .cur .dot{border-color:var(--amber)}
.stephead{font:500 11px var(--f-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--amber);margin-bottom:6px}
#step{min-width:0;max-width:720px}
.lesson-body{max-width:66ch;font-size:16.5px;line-height:1.72}
.lesson-body ul,.lesson-body ol{padding-left:22px;margin:0 0 16px}.lesson-body li{margin-bottom:7px}
.lesson-body b{color:#fff;font-weight:600}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin:16px 0}
.mini{border:1px solid var(--line2);border-radius:var(--r-sm);padding:14px 16px;background:var(--bg2)}
.mini b{display:block;margin-bottom:3px;font-weight:600}.mini span{color:var(--mute);font-size:14.5px}
.mini.bad{border-left:2px solid var(--bad)}
.defs{display:grid;grid-template-columns:max-content 1fr;gap:12px 22px;margin:0 0 16px}
.defs dt{font-weight:600;color:var(--fg)}.defs dd{margin:0;color:var(--mute)}
@media (max-width:560px){.defs{grid-template-columns:1fr;gap:2px}.defs dd{margin-bottom:12px}}
.tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin:16px 0}
.tool{border:1px solid var(--line2);border-radius:var(--r-sm);padding:14px 16px;background:var(--bg2)}
.tool b{font-size:15.5px}.tool .tag{margin-left:8px;font:500 10.5px var(--f-mono);letter-spacing:.06em;color:var(--cyan);border:1px solid rgba(108,196,209,.3);padding:2px 7px;border-radius:99px;text-transform:uppercase}
.tool p{margin:6px 0 0;color:var(--mute);font-size:14.5px}
.nav{display:flex;justify-content:space-between;gap:12px;margin-top:32px;padding-top:22px;border-top:1px solid var(--line2);flex-wrap:wrap}
@media (max-width:860px){.chlayout{grid-template-columns:1fr;gap:16px}.steps{position:static;grid-auto-flow:column;grid-auto-columns:max-content;overflow-x:auto;gap:4px;padding-bottom:6px;scrollbar-width:none}.steps button{white-space:nowrap}}
@media (max-width:560px){.chhead{gap:12px;padding:10px 12px 10px 6px}.emb{width:70px;height:70px}.emb canvas{inset:-8px;width:calc(100% + 16px);height:calc(100% + 16px)}}

/* ---------- exercises ---------- */
.opts{display:grid;gap:10px;margin:10px 0 6px}
.opt{margin:0;font-weight:400;display:flex;gap:12px;align-items:flex-start;padding:13px 15px;border:1px solid var(--line);border-radius:var(--r-sm);cursor:pointer;background:var(--bg2);color:var(--fg);transition:border-color var(--t-micro),background-color var(--t-micro),transform var(--t-micro) var(--ease)}
.opt:hover{border-color:var(--mute)}
.opt:active{transform:scale(.995)}
.opt input{margin-top:4px;accent-color:var(--amber);flex:none}
.opt:has(input:checked),.opt.sel{border-color:var(--amber);background:var(--amber-soft)}
.opt.right{border-color:var(--good);background:var(--good-soft)}.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.myth{border:1px solid var(--line2);border-radius:var(--r-sm);padding:15px 16px;margin-bottom:10px;background:var(--bg2)}
.myth .row{display:flex;gap:8px;margin-top:10px}
.myth .why{margin-top:10px;font-size:14.5px;padding:9px 12px;border-radius:var(--r-sm)}
.myth .why.ok{background:var(--good-soft)}.myth .why.no{background:var(--bad-soft)}
.coin{border:1px solid var(--line);border-radius:var(--r);background:var(--bg2);overflow:hidden;margin:16px 0;max-width:500px}
.coin h4{margin:0;padding:12px 16px;background:var(--panel2);font:500 14px var(--f-mono);display:flex;justify-content:space-between;gap:10px;border-bottom:1px solid var(--line)}
.coin h4 small{color:var(--mute)}
.coin table{width:100%;border-collapse:collapse;font-size:14.5px}
.coin td{padding:9px 16px;border-top:1px solid var(--line2);vertical-align:top}.coin tr:first-child td{border-top:0}.coin td:first-child{color:var(--mute);width:44%}
.fb{margin-top:14px;padding:14px 16px;border-radius:var(--r-sm);border:1px solid var(--line)}
.fb.best{background:var(--good-soft);border-color:rgba(76,175,135,.4)}.fb.ok{background:var(--warn-soft);border-color:rgba(217,164,65,.4)}.fb.bad{background:var(--bad-soft);border-color:rgba(224,112,112,.4)}
.fb b{display:block;margin-bottom:2px}
.check{margin:0 0 10px;font-weight:400;display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:1px solid var(--line2);border-radius:var(--r-sm);background:var(--bg2);cursor:pointer;color:var(--fg);transition:border-color var(--t-micro),background-color var(--t-micro)}
.check input{margin-top:4px;width:17px;height:17px;accent-color:var(--good);flex:none}
.check.on{border-color:rgba(76,175,135,.45);background:var(--good-soft)}
.check b{display:block;font-weight:600}.check span{color:var(--mute);font-size:14.5px}
.widget{border:1px solid var(--line2);border-radius:var(--r);background:var(--panel);padding:20px;margin:18px 0}
.widget svg{width:100%;height:auto;display:block;background:var(--bg2);border-radius:var(--r-sm)}
.widget .ctrl{display:grid;gap:4px;margin-top:12px}
.widget input[type=range]{width:100%;accent-color:var(--amber)}
.widget .out{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin-top:14px}
.widget .out div{background:var(--bg2);border:1px solid var(--line2);border-radius:var(--r-sm);padding:10px 12px;font-size:13px;color:var(--mute)}
.widget .out b{display:block;font-size:18px;color:var(--fg);margin-top:2px}
.widget .out .neg b{color:var(--bad)}.widget .out .pos b{color:var(--good)}
.ptr{transition:cx .5s ease,cy .5s ease}
.embed{border:1px solid var(--line2);border-radius:var(--r);overflow:hidden;background:var(--panel);margin:16px 0}
.embed iframe{width:100%;height:480px;border:0;display:block}
.bars{display:grid;grid-template-columns:repeat(11,1fr);gap:6px;height:90px;margin-top:16px;align-items:end}
.bars i{display:block;height:100%;border-radius:3px 3px 1px 1px;background:var(--fg2);opacity:.75;transform-origin:bottom;transition:transform .35s var(--ease)}
.bars i.low{background:var(--bad)}

/* ---------- quiz stepper ---------- */
.quiz{max-width:640px}
.qhead{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:6px 0 10px}
.qprog{height:3px;background:var(--line);border-radius:3px;overflow:hidden;margin-bottom:22px}
.qprog i{display:block;height:100%;background:var(--amber);transition:width .4s var(--ease)}
.qcard{min-height:240px}
.qcard .qt{font-size:19px;font-weight:600;letter-spacing:-.01em;margin-bottom:14px;line-height:1.4}
.qnav{display:flex;justify-content:space-between;gap:10px;margin-top:18px}
.qcard.in-f{animation:qinF .34s var(--ease) both}
.qcard.in-b{animation:qinB .34s var(--ease) both}
@keyframes qinF{from{opacity:0;transform:translate3d(22px,0,0) scale(.985)}to{opacity:1;transform:none}}
@keyframes qinB{from{opacity:0;transform:translate3d(-22px,0,0) scale(.985)}to{opacity:1;transform:none}}
.score{font:600 54px/1 var(--f-body);letter-spacing:-.04em;margin:6px 0 10px}
.qrev{margin-top:20px;display:grid;gap:12px}
.qrev .item{padding:14px 16px;border:1px solid var(--line2);border-radius:var(--r-sm);background:var(--bg2)}
.qrev .item.r{border-left:2px solid var(--good)}.qrev .item.w{border-left:2px solid var(--bad)}
.qrev .item b{display:block;margin-bottom:4px}
.qrev .item p{margin:4px 0 0;color:var(--mute);font-size:14.5px}

/* ---------- chapter complete + certificate ---------- */
.donewrap{display:grid;grid-template-columns:minmax(0,620px) minmax(0,1fr);gap:30px;align-items:center}
.emb.big{width:100%;max-width:280px;height:auto;aspect-ratio:1;justify-self:center}
.emb.big canvas{inset:0;width:100%;height:100%}
@media (max-width:860px){.donewrap{grid-template-columns:1fr}.emb.big{max-width:200px;order:-1}}
.cert{border:1px solid var(--line);outline:1px solid var(--line2);outline-offset:6px;border-radius:4px;background:#f6f4ef;color:#15171c;padding:clamp(20px,4vw,48px);text-align:center;max-width:760px}
.cert .k{font:500 11px var(--f-mono);letter-spacing:.18em;text-transform:uppercase;color:#8a6a2e}
.cert h2{color:#15171c;font-size:clamp(22px,3vw,30px);margin:10px 0 18px}
.cert .nm{font:600 clamp(28px,5vw,42px)/1.15 var(--f-body);letter-spacing:-.02em;margin:8px 0 6px;color:#15171c}
.cert .ln{width:min(380px,80%);height:1px;background:#c9b48a;margin:10px auto 14px}
.cert p{color:#4b4f58;margin:0}
.cert .meta{font:500 11.5px var(--f-mono);color:#6b6f78;margin-top:20px;letter-spacing:.04em}

/* ---------- static pages ---------- */
.doc{max-width:70ch}
.doc h2{margin-top:34px}
.doc p,.doc li{color:var(--fg2)}

/* ---------- states ---------- */
.loadbox{display:flex;align-items:center;gap:12px;padding:80px 0;font:500 13px var(--f-mono);color:var(--mute)}
.spin{width:16px;height:16px;border-radius:50%;border:2px solid var(--line);border-top-color:var(--amber);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.skel{background:linear-gradient(90deg,var(--panel) 25%,var(--panel2) 50%,var(--panel) 75%);background-size:200% 100%;animation:sk 1.4s ease infinite;border-radius:var(--r-sm)}
@keyframes sk{to{background-position:-200% 0}}
.netbar{position:fixed;left:50%;bottom:calc(18px + env(safe-area-inset-bottom,0px));transform:translate(-50%,0);z-index:40;background:var(--panel2);border:1px solid var(--line);color:var(--fg2);padding:10px 16px;border-radius:999px;font-size:13.5px;box-shadow:0 12px 30px -12px rgba(0,0,0,.6);max-width:calc(100vw - 32px);text-align:center}
.toast{position:fixed;left:50%;bottom:calc(22px + env(safe-area-inset-bottom,0px));transform:translate(-50%,24px);background:var(--panel2);color:var(--fg);border:1px solid var(--line);padding:10px 16px;border-radius:999px;font:500 13px var(--f-mono);opacity:0;pointer-events:none;transition:opacity .25s,transform .25s var(--ease);z-index:45;max-width:calc(100vw - 32px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}
.ownerbar{text-align:center;font:500 11px/1 var(--f-mono);letter-spacing:.08em;padding:8px 16px;background:var(--amber);color:var(--amber-ink)}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line2);padding-block:34px calc(44px + env(safe-area-inset-bottom,0px));color:var(--mute);font-size:13px}
footer p{max-width:92ch;margin:0 0 10px}
footer nav{display:flex;flex-wrap:wrap;gap:6px 18px;margin-bottom:14px}
footer nav a{color:var(--fg2);text-decoration:none}footer nav a:hover{color:var(--fg)}

/* ---------- transitions ---------- */
#main.pg-in{animation:pgIn var(--t-page) var(--ease) both}
@keyframes pgIn{from{opacity:0;transform:translate3d(0,10px,0)}to{opacity:1;transform:none}}
#step.st-f{animation:stF .38s var(--ease) both}
#step.st-b{animation:stB .38s var(--ease) both}
#step.st-0{animation:st0 .3s ease both}
@keyframes stF{from{opacity:0;transform:translate3d(28px,0,0)}to{opacity:1;transform:none}}
@keyframes stB{from{opacity:0;transform:translate3d(-28px,0,0)}to{opacity:1;transform:none}}
@keyframes st0{from{opacity:0;transform:translate3d(0,8px,0)}to{opacity:1;transform:none}}
.rv{opacity:0;transform:translate3d(0,16px,0);transition:opacity .6s ease,transform .7s var(--ease)}
.rv.in{opacity:1;transform:none}
.cine{position:fixed;inset:0;z-index:60;background:var(--bg);pointer-events:none;opacity:0;transition:opacity .5s ease}
.cine.on{opacity:1}
.burst{position:fixed;inset:0;width:100vw;height:100vh;pointer-events:none;z-index:30}

@media (max-width:860px){
  .land-hero{min-height:auto;align-items:flex-start;padding-top:min(70vw,440px)}
  .land-hero .earth{bottom:auto;height:min(80vw,540px)}
  .gets{grid-template-columns:1fr}
  .outline{grid-template-columns:1fr}
  .facts{grid-template-columns:1fr}
  .coord{display:none}
  .stats .hide-sm{display:none}
}
@media (max-width:480px){.brand span{display:none}.sec{padding-block:52px}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .rv{opacity:1;transform:none}
}