/* rootjavs — design system
   Layout: dark-first learning platform. Sticky top bar, wide 1200px canvas,
   course/lesson pages use a sidebar + reading column, labs use full-width workbenches. */
@import url("https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&family=Sora:wght@500;600;700;800&family=Figtree:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap");

:root{
  --bg:#070B14; --bg-2:#0B1120; --card:#0F1729; --card-2:#131E35; --raise:#18243F;
  --line:rgba(150,172,222,.14); --line-2:rgba(150,172,222,.24);
  --text:#E9EEFA; --muted:#97A5C2; --dim:#6B7894;
  --accent:#5B8CFF; --accent-2:#38C6E8; --accent-ink:#06102A;
  --gold:#FFC65C; --gold-ink:#2A1C00;
  --ok:#3DD68C; --ok-bg:rgba(61,214,140,.12); --bad:#FF6B6B; --bad-bg:rgba(255,107,107,.12); --warn:#FFC65C; --warn-bg:rgba(255,198,92,.12);
  --glow:0 0 0 1px rgba(91,140,255,.35),0 12px 40px -12px rgba(91,140,255,.45);
  --shadow:0 18px 50px -24px rgba(0,0,0,.7);
  --grid-line:rgba(120,150,220,.06);
  --cap:#1A2643; --cap-edge:#050811;
  --f-lp:#5A2C3A; --f-lr:#5E4426; --f-lm:#57532A; --f-li:#2D5236; --f-ri:#22505A; --f-rm:#2C3D6C; --f-rr:#47326B; --f-rp:#5C2F55; --f-th:#26324C;
  --display:"Sora","Segoe UI",system-ui,sans-serif;
  --body:"Figtree","Segoe UI",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
  --r:14px; --r-sm:9px;
  color-scheme:dark;
}
:root[data-theme="light"]{
  --bg:#F5F7FC; --bg-2:#EDF1F9; --card:#FFFFFF; --card-2:#F7F9FD; --raise:#EEF2FA;
  --line:rgba(30,50,100,.12); --line-2:rgba(30,50,100,.2);
  --text:#0E1630; --muted:#4F5C78; --dim:#7A86A0;
  --accent:#2F64F0; --accent-2:#0894B8; --accent-ink:#FFFFFF;
  --gold:#C98A00; --gold-ink:#FFFFFF;
  --ok:#14995A; --ok-bg:#E2F6EC; --bad:#D63B3B; --bad-bg:#FCE7E7; --warn:#B07800; --warn-bg:#FFF4D6;
  --glow:0 0 0 1px rgba(47,100,240,.3),0 12px 34px -14px rgba(47,100,240,.35);
  --shadow:0 18px 40px -26px rgba(20,40,90,.35);
  --grid-line:rgba(30,60,140,.05);
  --cap:#FFFFFF; --cap-edge:#B6C0D6;
  --f-lp:#F6C9D2; --f-lr:#F8DDB6; --f-lm:#F3EDB0; --f-li:#C8EBCF; --f-ri:#BFE6EE; --f-rm:#C9D5F6; --f-rr:#DECDF5; --f-rp:#F3C8E6; --f-th:#E1E6F0;
  color-scheme:light;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--body);font-size:16.5px;line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;
  background:
   radial-gradient(900px 500px at 85% -10%,rgba(91,140,255,.16),transparent 60%),
   radial-gradient(700px 420px at -10% 10%,rgba(56,198,232,.08),transparent 60%),
   linear-gradient(var(--grid-line) 1px,transparent 1px) 0 0/48px 48px,
   linear-gradient(90deg,var(--grid-line) 1px,transparent 1px) 0 0/48px 48px;}
img{max-width:100%}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
h1,h2,h3,h4{font-family:var(--display);line-height:1.15;margin:0;text-wrap:balance;letter-spacing:-.015em}
p{margin:0 0 12px}
.container{max-width:1200px;margin:0 auto;padding-inline:20px;width:100%}
main{flex:1;padding-block:32px 72px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}
.small{font-size:14px}
.eyebrow{font-family:var(--mono);font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-2)}
.grad{background:linear-gradient(92deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);background:color-mix(in srgb,var(--bg) 78%,transparent);border-bottom:1px solid var(--line)}
.hdr .container{display:flex;align-items:center;gap:22px;min-height:66px}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-family:var(--display);font-weight:800;font-size:20px;letter-spacing:-.02em}
.logo:hover{text-decoration:none}
.logo svg{width:32px;height:32px;flex:none}
.nav{display:flex;gap:2px;flex:1}
.nav a{color:var(--muted);font-weight:600;font-size:15px;padding:8px 12px;border-radius:8px}
.nav a:hover,.nav a.on{color:var(--text);background:var(--card-2);text-decoration:none}
.hdr-r{display:flex;gap:8px;align-items:center}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--card);display:grid;place-items:center;cursor:pointer;color:var(--muted)}
.icon-btn:hover{color:var(--text);border-color:var(--line-2)}
.icon-btn svg{width:18px;height:18px}
.menu-btn{display:none}
.mnav{display:none}
@media (max-width:980px){
  .nav,.hdr-r .hide-m{display:none}
  .menu-btn{display:grid}
  .hdr .container{justify-content:space-between}
  .mnav.open{display:grid;gap:4px;padding:10px 20px 18px;border-top:1px solid var(--line)}
  .mnav a{color:var(--text);padding:10px 12px;border-radius:8px;font-weight:600;background:var(--card)}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:10px 18px;border-radius:11px;border:1px solid var(--line-2);background:var(--card);color:var(--text);font-weight:700;font-size:15px;cursor:pointer;transition:transform .15s,border-color .15s,background .15s,box-shadow .15s;white-space:nowrap}
.btn:hover{text-decoration:none;border-color:var(--accent);transform:translateY(-1px)}
.btn svg{width:18px;height:18px}
.btn.pri{background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 70%,var(--accent-2)));border-color:transparent;color:#fff;box-shadow:var(--glow)}
.btn.pri:hover{filter:brightness(1.08)}
.btn.gold{background:var(--gold);color:var(--gold-ink);border-color:transparent}
.btn.ghost{background:transparent}
.btn.sm{min-height:36px;padding:6px 13px;font-size:14px;border-radius:9px}
.btn.lg{min-height:52px;padding:12px 24px;font-size:16.5px}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}

/* ---------- generic surfaces ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;min-width:0}
.card.hover{transition:border-color .2s,transform .2s,box-shadow .2s}
.card.hover:hover{border-color:var(--line-2);transform:translateY(-3px);box-shadow:var(--shadow)}
a.card{color:var(--text);display:block}
a.card:hover{text-decoration:none}
.chip{display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:4px 9px;border-radius:999px;background:var(--raise);color:var(--muted);white-space:nowrap}
.chip.blue{background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent)}
.chip.cyan{background:color-mix(in srgb,var(--accent-2) 16%,transparent);color:var(--accent-2)}
.chip.ok{background:var(--ok-bg);color:var(--ok)}
.chip.gold{background:var(--warn-bg);color:var(--gold)}
.chip.bad{background:var(--bad-bg);color:var(--bad)}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:980px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.sec{margin-top:88px}
.sec-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:16px;margin-bottom:26px}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);margin-top:8px}
.sec-head p{color:var(--muted);max-width:56ch;margin:10px 0 0}
.page-head{margin-bottom:30px}
.page-head h1{font-size:clamp(30px,4.6vw,48px);margin-top:10px}
.page-head p{color:var(--muted);max-width:64ch;margin-top:12px;font-size:17.5px}
.crumbs{font-size:14px;color:var(--dim);margin-bottom:8px}
.crumbs a{color:var(--muted)}
.icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:color-mix(in srgb,var(--accent) 14%,transparent);color:var(--accent);flex:none}
.icon svg{width:22px;height:22px}
.icon.cyan{background:color-mix(in srgb,var(--accent-2) 14%,transparent);color:var(--accent-2)}
.icon.gold{background:var(--warn-bg);color:var(--gold)}
.icon.ok{background:var(--ok-bg);color:var(--ok)}

/* ---------- hero ---------- */
.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:48px;align-items:center;padding-top:28px}
.hero h1{font-size:clamp(38px,5.6vw,64px);font-weight:800;letter-spacing:-.035em;margin-top:18px}
.hero .lead{font-size:19px;color:var(--muted);max-width:52ch;margin:20px 0 28px}
.pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line-2);background:var(--card);border-radius:999px;padding:6px 14px 6px 6px;font-size:14px;color:var(--muted)}
.pill b{background:var(--gold);color:var(--gold-ink);font-family:var(--mono);font-size:11px;letter-spacing:.06em;border-radius:999px;padding:3px 8px}
.trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:30px;color:var(--muted);font-size:14.5px}
.trust span{display:inline-flex;gap:8px;align-items:center}
.trust svg{width:17px;height:17px;color:var(--ok)}
@media (max-width:980px){.hero{grid-template-columns:1fr;gap:36px}}

/* app mock window */
.appwin{background:var(--card);border:1px solid var(--line-2);border-radius:18px;box-shadow:var(--shadow),0 0 80px -30px rgba(91,140,255,.5);overflow:hidden;min-width:0}
.appwin .bar{display:flex;align-items:center;gap:6px;padding:10px 12px;border-bottom:1px solid var(--line);background:var(--card-2);overflow-x:auto}
.appwin .bar button{border:0;background:transparent;color:var(--muted);font-weight:700;font-size:13.5px;padding:7px 12px;border-radius:8px;cursor:pointer;display:flex;gap:7px;align-items:center;white-space:nowrap}
.appwin .bar button.on{background:var(--raise);color:var(--text)}
.appwin .bar button i{width:9px;height:9px;border-radius:3px;display:inline-block}
.appwin .body{padding:16px;min-height:330px}
.appwin .foot{border-top:1px solid var(--line);padding:9px 14px;font-family:var(--mono);font-size:12px;color:var(--dim);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* ---------- stats band ---------- */
.band{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid var(--line);border-radius:var(--r);background:var(--card);margin-top:64px}
.band div{padding:22px 24px;border-left:1px solid var(--line)}
.band div:first-child{border-left:0}
.band b{display:block;font-family:var(--display);font-size:30px;font-weight:800;letter-spacing:-.02em}
.band span{color:var(--muted);font-size:14.5px}
@media (max-width:760px){.band{grid-template-columns:1fr 1fr}.band div:nth-child(3){border-left:0}.band div:nth-child(n+3){border-top:1px solid var(--line)}}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:s}
.step{position:relative}
.step .n{font-family:var(--mono);font-size:13px;font-weight:700;color:var(--accent-2)}
.step h3{font-size:20px;margin:10px 0 6px}
.step p{color:var(--muted);font-size:15px;margin:0}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

/* course cards */
.ccard{display:flex;flex-direction:column;gap:12px;height:100%}
.ccard .top{display:flex;justify-content:space-between;align-items:start;gap:10px}
.ccard h3{font-size:19px}
.ccard p{color:var(--muted);font-size:15px;margin:0}
.ccard .meta{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:13.5px;color:var(--dim);margin-top:auto;padding-top:12px;border-top:1px solid var(--line)}
.ccard .meta span{display:inline-flex;gap:6px;align-items:center}
.ccard .meta svg{width:15px;height:15px}
.pbar{height:6px;background:var(--raise);border-radius:99px;overflow:hidden}
.pbar i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:99px}
.soon{opacity:.6}

/* filters */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.filters button{border:1px solid var(--line);background:var(--card);color:var(--muted);border-radius:999px;padding:7px 15px;font-weight:600;font-size:14.5px;cursor:pointer}
.filters button.on{border-color:var(--accent);color:var(--text);background:color-mix(in srgb,var(--accent) 14%,var(--card))}
.search{display:flex;align-items:center;gap:10px;border:1px solid var(--line);background:var(--card);border-radius:12px;padding:0 14px;min-height:48px;max-width:420px;flex:1}
.search svg{width:18px;height:18px;color:var(--dim)}
.search input{border:0;background:transparent;outline:none;flex:1;min-width:0;font-size:15.5px}

/* ---------- course page ---------- */
.course-hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:28px;align-items:start}
@media (max-width:900px){.course-hero{grid-template-columns:1fr}}
.learn-list{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px;list-style:none;padding:0;margin:0}
.learn-list li{display:flex;gap:10px;font-size:15.5px}
.learn-list svg{width:18px;height:18px;color:var(--ok);flex:none;margin-top:3px}
@media (max-width:640px){.learn-list{grid-template-columns:1fr}}
.lesson-list{display:grid;gap:10px}
.lrow{display:grid;grid-template-columns:44px minmax(0,1fr) auto;gap:14px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--text)}
a.lrow:hover{border-color:var(--accent);text-decoration:none}
.lrow .num{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-family:var(--mono);font-weight:700;background:var(--raise);color:var(--muted)}
.lrow.done .num{background:var(--ok-bg);color:var(--ok)}
.lrow b{display:block;font-weight:700}
.lrow small{color:var(--dim);font-size:13.5px}
.lrow.locked{opacity:.55}

/* lesson layout */
.lesson-wrap{display:grid;grid-template-columns:270px minmax(0,1fr);gap:32px;align-items:start}
.lside{position:sticky;top:86px;display:grid;gap:4px;max-height:calc(100vh - 110px);overflow:auto}
.lside a{display:grid;grid-template-columns:28px 1fr;gap:10px;padding:9px 10px;border-radius:9px;color:var(--muted);font-size:14.5px;line-height:1.35}
.lside a:hover{background:var(--card);text-decoration:none;color:var(--text)}
.lside a.on{background:var(--card-2);color:var(--text);font-weight:600;box-shadow:inset 3px 0 0 var(--accent)}
.lside .n{font-family:var(--mono);font-size:12px;width:26px;height:26px;border-radius:7px;display:grid;place-items:center;background:var(--raise)}
.lside a.done .n{background:var(--ok-bg);color:var(--ok)}
@media (max-width:980px){.lesson-wrap{grid-template-columns:1fr}.lside{position:static;max-height:none;grid-template-columns:1fr}}
.ltabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin:22px 0 26px;overflow-x:auto}
.ltabs button{border:0;background:none;color:var(--muted);font-weight:700;padding:11px 16px;cursor:pointer;border-bottom:2px solid transparent;white-space:nowrap;display:flex;gap:8px;align-items:center}
.ltabs button.on{color:var(--text);border-bottom-color:var(--accent)}
.ltabs button .ck{color:var(--ok)}

/* notes */
.notes{max-width:76ch}
.notes h2{font-size:24px;margin:36px 0 12px}
.notes h2:first-child{margin-top:0}
.notes p{color:color-mix(in srgb,var(--text) 88%,var(--muted))}
.notes ul,.notes ol{padding-left:22px;margin:0 0 16px;display:grid;gap:7px}
.notes li::marker{color:var(--accent-2)}
.callout{display:grid;grid-template-columns:30px 1fr;gap:12px;border:1px solid color-mix(in srgb,var(--gold) 35%,transparent);background:var(--warn-bg);border-radius:12px;padding:14px 16px;margin:0 0 18px}
.callout svg{width:22px;height:22px;color:var(--gold)}
.callout b{display:block;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--gold);margin-bottom:2px}
.task-box{border:1px solid color-mix(in srgb,var(--accent) 45%,transparent);background:color-mix(in srgb,var(--accent) 7%,var(--card));border-radius:var(--r);padding:20px 22px;margin-top:30px}
.task-box h3{font-size:18px;margin-bottom:10px;display:flex;gap:10px;align-items:center}
.task-box h3 svg{width:20px;height:20px;color:var(--accent)}
.task-box ol{margin:0;padding-left:22px;display:grid;gap:6px}
.tbl{overflow-x:auto;border:1px solid var(--line);border-radius:12px;margin:0 0 18px}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:var(--card-2)}
tr:last-child td{border-bottom:0}
td{background:var(--card)}
mark.hl{background:color-mix(in srgb,var(--accent) 22%,transparent);color:var(--text);padding:0 4px;border-radius:4px}
.kc{display:inline-block;font-family:var(--mono);font-size:.8em;font-weight:700;background:var(--cap);border:1px solid var(--line-2);border-bottom:3px solid var(--cap-edge);border-radius:6px;padding:1px 7px;line-height:1.5;white-space:nowrap;color:var(--text)}
.plus{color:var(--dim);margin:0 3px;font-family:var(--mono);font-size:.8em}
.notes-tools{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:26px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.notes-tools .sp{flex:1}

/* status + result */
.status{border-radius:11px;padding:12px 16px;font-weight:600;margin-top:14px;display:flex;gap:10px;align-items:center}
.status.ok{background:var(--ok-bg);color:var(--ok)}
.status.bad{background:var(--bad-bg);color:var(--bad)}
.status.info{background:var(--raise);color:var(--text)}
.result{display:flex;flex-wrap:wrap;gap:22px;align-items:center}
.ring{--p:0;width:110px;height:110px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--accent) calc(var(--p)*1%),var(--raise) 0);position:relative;flex:none}
.ring::after{content:"";position:absolute;inset:10px;border-radius:50%;background:var(--card)}
.ring b{position:relative;z-index:1;font-family:var(--display);font-size:24px}
.ring.ok{background:conic-gradient(var(--ok) calc(var(--p)*1%),var(--raise) 0)}
.ring.bad{background:conic-gradient(var(--bad) calc(var(--p)*1%),var(--raise) 0)}

/* quiz / exam */
.q{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;margin-bottom:14px}
.q fieldset{border:0;margin:0;padding:0;min-width:0}
.q legend{font-weight:700;font-size:17px;padding:0;margin-bottom:12px}
.q .qn{display:block;font-family:var(--mono);font-size:12px;color:var(--accent-2);margin-bottom:4px;letter-spacing:.06em}
.opt{display:flex;gap:12px;align-items:flex-start;padding:11px 14px;border:1px solid var(--line);border-radius:10px;margin-top:8px;cursor:pointer;background:var(--card-2);transition:border-color .15s}
.opt:hover{border-color:var(--line-2)}
.opt input{margin-top:5px;accent-color:var(--accent)}
.opt.right{border-color:var(--ok);background:var(--ok-bg)}
.opt.wrong{border-color:var(--bad);background:var(--bad-bg)}
.exam-wrap{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:26px;align-items:start}
.exam-side{position:sticky;top:86px}
.qnav{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin-top:12px}
.qnav button{aspect-ratio:1;border-radius:9px;border:1px solid var(--line);background:var(--card-2);cursor:pointer;font-family:var(--mono);font-weight:700;font-size:13.5px}
.qnav button.ans{background:color-mix(in srgb,var(--accent) 22%,transparent);border-color:var(--accent)}
.qnav button.cur{outline:2px solid var(--accent-2)}
.timer{font-family:var(--mono);font-size:32px;font-weight:700;letter-spacing:.02em}
.timer.low{color:var(--bad)}
@media (max-width:900px){.exam-wrap{grid-template-columns:1fr}.exam-side{position:static;order:-1}}

/* ---------- labs ---------- */
.lab-wrap{display:grid;grid-template-columns:320px minmax(0,1fr);gap:22px;align-items:start}
@media (max-width:1000px){.lab-wrap{grid-template-columns:1fr}}
.lab-brief{position:sticky;top:86px}
@media (max-width:1000px){.lab-brief{position:static}}
.tasks{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:9px}
.tasks li{display:grid;grid-template-columns:24px 1fr;gap:10px;font-size:15px;line-height:1.45}
.tasks .ck{width:22px;height:22px;border-radius:7px;border:2px solid var(--line-2);display:grid;place-items:center;font-size:12px;margin-top:1px}
.tasks li.done .ck{background:var(--ok);border-color:var(--ok);color:#03140b}
.tasks li.done span{color:var(--dim);text-decoration:line-through}
.bench{background:var(--card);border:1px solid var(--line-2);border-radius:var(--r);overflow:hidden;min-width:0}
.bench-bar{display:flex;flex-wrap:wrap;gap:6px;padding:10px;border-bottom:1px solid var(--line);background:var(--card-2);align-items:center}
.tb{border:1px solid var(--line);background:var(--card);border-radius:8px;min-width:36px;height:36px;padding:0 10px;cursor:pointer;font-weight:700;font-size:14px;display:inline-flex;align-items:center;justify-content:center;gap:6px}
.tb:hover{border-color:var(--accent)}
.tb.on{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 18%,var(--card))}
.tb[disabled]{opacity:.4;cursor:default}
.tb svg{width:16px;height:16px}
.sep{width:1px;height:24px;background:var(--line);margin:0 4px}
.bench select{background:var(--card);border:1px solid var(--line);border-radius:8px;height:36px;padding:0 8px}

/* word doc */
.paper-zone{background:var(--bg-2);padding:26px 18px;overflow:auto;max-height:640px}
.paper{background:#fff;color:#1b1b1b;max-width:720px;margin:0 auto;min-height:620px;padding:56px 60px;border-radius:4px;box-shadow:0 10px 40px -10px rgba(0,0,0,.5);font-family:Calibri,Carlito,"Segoe UI",Arial,sans-serif;font-size:15px;line-height:1.5;outline:none}
.paper h1{font-family:Cambria,Georgia,serif;font-size:28px;color:#1F3864;margin:0 0 10px;letter-spacing:0}
.paper h2{font-family:Cambria,Georgia,serif;font-size:19px;color:#2F5496;margin:18px 0 6px;letter-spacing:0}
.paper p{margin:0 0 8px}
.paper ul,.paper ol{margin:0 0 10px;padding-left:26px}
.paper table{border-collapse:collapse;width:100%;margin:8px 0 12px}
.paper td,.paper th{border:1px solid #9aa4b5;padding:6px 8px;background:#fff;color:#1b1b1b;font-family:inherit;font-size:14px;text-transform:none;letter-spacing:0}
@media (max-width:640px){.paper{padding:28px 22px}}

/* sheet */
.sheet-wrap{overflow:auto;max-height:560px}
.fbar{display:flex;align-items:center;gap:8px;padding:8px 10px;border-bottom:1px solid var(--line);background:var(--card)}
.fbar .addr{font-family:var(--mono);font-weight:700;width:58px;text-align:center;border:1px solid var(--line);border-radius:6px;padding:5px 0;background:var(--card-2)}
.fbar .fx{font-family:var(--mono);color:var(--accent-2);font-weight:700;font-style:italic}
.fbar input{flex:1;min-width:0;border:1px solid var(--line);border-radius:6px;padding:6px 10px;background:var(--card-2);font-family:var(--mono);font-size:14px}
table.sheet{border-collapse:separate;border-spacing:0;font-family:var(--body);font-size:14px;width:max-content;min-width:100%}
table.sheet th{position:sticky;top:0;background:var(--card-2);text-align:center;font-family:var(--mono);font-size:12px;padding:6px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);z-index:2;color:var(--muted);letter-spacing:0;text-transform:none}
table.sheet th.rh{position:sticky;left:0;z-index:1;width:42px}
table.sheet th.corner{left:0;z-index:3}
table.sheet td{padding:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--card);min-width:110px;height:32px;cursor:cell;white-space:nowrap}
table.sheet td .cv{padding:5px 8px;overflow:hidden;text-overflow:ellipsis;max-width:180px}
table.sheet td.num .cv{text-align:right;font-variant-numeric:tabular-nums}
table.sheet td.sel{outline:2px solid var(--accent);outline-offset:-2px;background:color-mix(in srgb,var(--accent) 8%,var(--card))}
table.sheet td.hdrcell{font-weight:700;background:var(--card-2)}
table.sheet td.err .cv{color:var(--bad)}
table.sheet td input{width:100%;height:32px;border:0;outline:2px solid var(--accent);background:var(--card);padding:0 8px;font-family:var(--mono);font-size:13.5px}

/* slides */
.ppt{display:grid;grid-template-columns:170px minmax(0,1fr);min-height:520px}
@media (max-width:760px){.ppt{grid-template-columns:1fr}}
.thumbs{border-right:1px solid var(--line);padding:10px;display:grid;gap:10px;align-content:start;background:var(--card-2);max-height:620px;overflow:auto}
@media (max-width:760px){.thumbs{grid-auto-flow:column;grid-auto-columns:140px;overflow-x:auto;border-right:0;border-bottom:1px solid var(--line)}}
.thumb{border:2px solid transparent;border-radius:8px;cursor:pointer;padding:0;background:none;text-align:left;position:relative}
.thumb.on{border-color:var(--accent)}
.thumb .no{position:absolute;left:-2px;top:-2px;font-family:var(--mono);font-size:10px;background:var(--raise);border-radius:6px 0 6px 0;padding:1px 6px;z-index:1}
.slide{aspect-ratio:16/9;width:100%;border-radius:6px;overflow:hidden;position:relative;container-type:inline-size}
.slide .in{position:absolute;inset:0;padding:7% 8%;display:flex;flex-direction:column}
.slide h3{font-family:var(--display);font-size:6.2cqw;line-height:1.1;letter-spacing:-.01em}
.slide .sub{font-size:3cqw;margin-top:2cqw;opacity:.85}
.slide ul{margin:3cqw 0 0;padding-left:5cqw;font-size:3.1cqw;line-height:1.5;display:grid;gap:.8cqw}
.slide.title .in{justify-content:center}
.slide.title h3{font-size:7.4cqw}
.slide.section .in{justify-content:flex-end}
.slide .deco{position:absolute;pointer-events:none}
.stage{padding:18px;display:grid;gap:14px;align-content:start;min-width:0}
.stage .slide{box-shadow:0 14px 40px -16px rgba(0,0,0,.6)}
.fields{display:grid;gap:10px}
.field{display:grid;gap:5px}
.field label{font-weight:700;font-size:14px;color:var(--muted)}
.field input,.field textarea,.field select{border:1px solid var(--line);background:var(--card-2);border-radius:9px;padding:9px 12px;font-size:15px;width:100%}
.field textarea{resize:vertical;min-height:84px}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--accent)}

/* explorer */
.exp-path{display:flex;gap:8px;align-items:center;padding:9px 12px;border-bottom:1px solid var(--line);font-family:var(--mono);font-size:13px;overflow-x:auto;white-space:nowrap;color:var(--muted)}
.exp-body{display:grid;grid-template-columns:170px minmax(0,1fr);min-height:300px}
.exp-side{border-right:1px solid var(--line);padding:10px;display:flex;flex-direction:column;gap:3px;background:var(--card-2)}
.exp-side button{border:0;background:none;text-align:left;padding:8px 10px;border-radius:7px;cursor:pointer;font-size:14.5px;color:var(--muted);display:flex;gap:8px;align-items:center}
.exp-side button svg{width:16px;height:16px}
.exp-side button.on{background:var(--raise);color:var(--text);font-weight:600}
.exp-items{padding:12px;display:grid;grid-template-columns:repeat(auto-fill,minmax(104px,1fr));gap:8px;align-content:start}
.ei{border:1px solid transparent;border-radius:10px;padding:10px 6px;text-align:center;cursor:pointer;background:none;font-size:13px;line-height:1.3;word-break:break-word;min-width:0}
.ei:hover{background:var(--card-2)}
.ei.sel{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,var(--card))}
.ei svg{display:block;margin:0 auto 6px;width:42px;height:36px}
.ei input{width:100%;font-size:13px;padding:3px 5px;border:1px solid var(--accent);border-radius:5px;background:var(--card)}
.exp-empty{color:var(--dim);grid-column:1/-1;text-align:center;padding:40px 0;font-size:14px}
.exp-msg{padding:10px 14px;font-size:14px;border-top:1px solid var(--line);color:var(--muted);min-height:42px}
@media (max-width:640px){.exp-body{grid-template-columns:1fr}.exp-side{flex-direction:row;flex-wrap:wrap;border-right:0;border-bottom:1px solid var(--line)}}

/* laptop diagram */
.lapsvg{width:100%;height:auto;display:block}
.lapsvg .hot{cursor:pointer}
.lapsvg .hot .fillme{transition:fill .15s}
.lapsvg .hot:hover .fillme,.lapsvg .hot:focus .fillme,.lapsvg .hot.sel .fillme{fill:color-mix(in srgb,var(--accent) 45%,var(--card))}
.lapsvg .hot.right .fillme{fill:var(--ok)}
.lapsvg .hot.wrong .fillme{fill:var(--bad)}
.order-pick{display:flex;flex-wrap:wrap;gap:8px}
.order-pick button{border:1px solid var(--line);background:var(--card-2);border-radius:9px;padding:9px 13px;cursor:pointer;font-size:14.5px;text-align:left}
.order-pick button[disabled]{opacity:.3;cursor:default}
.order-list{margin:12px 0;padding-left:24px;min-height:24px;display:grid;gap:4px}

/* typing */
.target{font-family:var(--mono);font-size:20px;line-height:1.85;background:var(--card-2);border:1px solid var(--line);border-radius:12px;padding:16px 18px;word-break:break-word;min-height:110px}
.target .ok{color:var(--ok)}
.target .bad{color:var(--bad);background:var(--bad-bg);border-radius:3px}
.target .cur{background:var(--accent);color:#fff;border-radius:3px;animation:blink 1s steps(2) infinite}
.target .rest{color:var(--dim)}
@keyframes blink{50%{background:color-mix(in srgb,var(--accent) 50%,transparent)}}
.typein{width:100%;font-family:var(--mono);font-size:17px;margin-top:12px;padding:12px 14px;border:1px solid var(--line-2);border-radius:12px;background:var(--card);resize:none}
.typein:focus{outline:none;border-color:var(--accent);box-shadow:var(--glow)}
.stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.stat{background:var(--card-2);border:1px solid var(--line);border-radius:12px;padding:10px 16px;min-width:110px}
.stat small{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--dim)}
.stat b{font-family:var(--display);font-size:28px;font-variant-numeric:tabular-nums}
.stat b.sm{font-size:16px}
.kbwrap{overflow-x:auto;margin-top:16px}
.kb{display:grid;gap:6px;min-width:560px}
.kb .r{display:flex;gap:6px}
.kb .r:nth-child(2){padding-left:20px}
.kb .r:nth-child(3){padding-left:40px}
.kb .k{flex:1;max-width:50px;height:44px;border-radius:8px;border:1px solid var(--line-2);border-bottom-width:3px;display:grid;place-items:center;font-family:var(--mono);font-weight:700;font-size:14px;transition:transform .1s}
.kb .k.space{max-width:none;flex:6}
.kb .k.nxt{outline:2px solid var(--text);outline-offset:2px;transform:translateY(-2px)}
.kb .sp{justify-content:center;padding:0 70px}
.legend{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:12px;font-size:13px;color:var(--muted)}
.legend i{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:5px;vertical-align:-1px}
.lessons-pick{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:16px}
.lessons-pick button{border:1px solid var(--line);background:var(--card-2);border-radius:9px;padding:7px 12px;font-size:14px;cursor:pointer;font-weight:600;color:var(--muted)}
.lessons-pick button.on{border-color:var(--accent);color:var(--text)}
.lessons-pick button.done{color:var(--ok)}

/* shortcut stage */
.sc-stage{display:grid;place-items:center;text-align:center;gap:10px;padding:36px 16px;background:var(--card-2);border:2px dashed var(--line-2);border-radius:14px;cursor:pointer;min-height:220px}
.sc-stage:focus{outline:none;border-color:var(--accent);border-style:solid;box-shadow:var(--glow)}
.sc-stage .ask{font-family:var(--display);font-size:clamp(24px,3.4vw,34px);font-weight:700}
.sc-stage .ans .kc{font-size:22px;padding:5px 14px}
.sc-stage .hint{color:var(--muted)}

/* terminal (hero) */
.term{font-family:var(--mono);font-size:13.5px;line-height:1.7;background:#050811;color:#CFE1FF;border-radius:10px;padding:14px;min-height:300px;max-height:300px;overflow:auto}
.term .p{color:#5EE6A8}
.term .c{color:#7FA8FF}
.term input{background:transparent;border:0;outline:0;color:#fff;font-family:var(--mono);font-size:13.5px;width:60%}

/* certificate */
.cert-canvas{width:100%;height:auto;border-radius:12px;border:1px solid var(--line);display:block;background:#fff}
.cert-mini{aspect-ratio:1.414;background:#FBFAF6;border-radius:12px;position:relative;overflow:hidden;color:#141B2E;padding:7% 8%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;box-shadow:var(--shadow)}
.cert-mini::before{content:"";position:absolute;inset:3.5%;border:2px solid #1D3D8F;border-radius:4px}
.cert-mini::after{content:"";position:absolute;inset:5%;border:1px solid #C9A227;border-radius:2px}
.cert-mini small{font-family:var(--mono);font-size:clamp(8px,1.4vw,12px);letter-spacing:.2em;color:#6A7390}
.cert-mini h4{font-family:var(--display);font-size:clamp(14px,2.4vw,22px);margin:6px 0}
.cert-mini .nm{font-family:Georgia,serif;font-style:italic;font-size:clamp(20px,3.6vw,34px);color:#1D3D8F;margin:4px 0}
.cert-mini .seal{position:absolute;right:9%;bottom:10%;width:14%;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,#E8C55A,#B8901E);display:grid;place-items:center;color:#3A2A00;font-family:var(--mono);font-weight:700;font-size:clamp(7px,1.1vw,10px);box-shadow:0 0 0 4px rgba(201,162,39,.25)}

/* faq */
details.faq{border:1px solid var(--line);border-radius:12px;background:var(--card);padding:0 18px;margin-bottom:10px}
details.faq summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:700;display:flex;justify-content:space-between;gap:12px}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";font-family:var(--mono);color:var(--accent);font-size:20px;line-height:1}
details.faq[open] summary::after{content:"–"}
details.faq p{color:var(--muted);padding-bottom:16px;margin:0}

/* roadmap */
.road{position:relative;display:grid;gap:14px;padding-left:28px}
.road::before{content:"";position:absolute;left:10px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--accent),var(--accent-2))}
.road .st{position:relative}
.road .st::before{content:"";position:absolute;left:-24px;top:20px;width:12px;height:12px;border-radius:50%;background:var(--bg);border:2px solid var(--accent-2)}

/* glossary */
.az{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:24px}
.az a{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--line);border-radius:8px;font-family:var(--mono);font-weight:700;color:var(--muted);background:var(--card)}
.az a:hover{color:var(--text);text-decoration:none;border-color:var(--accent)}
.gterm{display:grid;grid-template-columns:220px minmax(0,1fr);gap:16px;padding:16px 0;border-bottom:1px solid var(--line)}
.gterm b{font-family:var(--display);font-size:17px}
.gterm p{margin:0;color:var(--muted)}
@media (max-width:640px){.gterm{grid-template-columns:1fr;gap:4px}}

/* forms (auth/contact) */
.auth{max-width:440px;margin:0 auto}
.form{display:grid;gap:14px}
.form .field input,.form .field textarea{padding:12px 14px}
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:var(--raise);border:1px solid var(--line-2);padding:12px 18px;border-radius:12px;font-weight:600;opacity:0;transition:.25s;z-index:100;box-shadow:var(--shadow);max-width:calc(100% - 32px)}
.toast.show{opacity:1;transform:translateX(-50%)}

/* dashboard */
.dash-top{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:18px}
@media (max-width:900px){.dash-top{grid-template-columns:1fr}}
.kpi b{display:block;font-family:var(--display);font-size:32px;font-weight:800}
.kpi span{color:var(--muted);font-size:14px}

/* cta band */
.cta{border-radius:22px;padding:48px;background:radial-gradient(600px 300px at 90% 0%,color-mix(in srgb,var(--accent-2) 30%,transparent),transparent 70%),linear-gradient(135deg,color-mix(in srgb,var(--accent) 35%,var(--card)),var(--card));border:1px solid var(--line-2);display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:center}
.cta h2{font-size:clamp(26px,3.6vw,40px);max-width:20ch}
@media (max-width:640px){.cta{padding:30px 22px}}

/* footer */
.ftr{border-top:1px solid var(--line);padding-block:48px 28px;background:var(--bg-2)}
.ftr .cols{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:28px}
.ftr h4{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);margin-bottom:12px}
.ftr a{display:block;color:var(--muted);font-size:14.5px;padding:3px 0}
.ftr .bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;border-top:1px solid var(--line);margin-top:36px;padding-top:20px;color:var(--dim);font-size:13.5px}
@media (max-width:900px){.ftr .cols{grid-template-columns:1fr 1fr}}

.fade{animation:fade .5s ease both}
@keyframes fade{from{opacity:.001;transform:translateY(8px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.hdr,.ftr,.notes-tools,.ltabs,.lside{display:none!important}body::before{display:none}}
/* hero demo sizing */
#demo table.sheet{width:100%;min-width:0;font-size:13px}
#demo table.sheet td{min-width:0;height:30px}
#demo table.sheet td .cv{max-width:none;padding:4px 7px}
#demo table.sheet td input{height:30px;outline:0;background:transparent;font-size:13px}
#demo table.sheet th.rh{width:28px}


/* =====================================================================
   rootjavs v2 theme (2026-11): dark navy + electric blue + terminal colours.
   Only overrides and additions. Cyan = commands/success, yellow = XP/warnings,
   magenta = keywords/games, red = danger. Light mode keeps working.
   The colour/font theme below is switched off: it applies only when <html> has class "v2".
   The old rootjavs design stays the default. Component styles below work with both.
   ===================================================================== */
:root.v2{
  --bg:#050A15; --bg-2:#08101F; --card:#0B1324; --card-2:#101B31; --raise:#132039;
  --line:#1B2741; --line-2:#26365A;
  --text:#F2F5FA; --muted:#C9CFD8; --dim:#8A93A0;
  --accent:#3B9EFF; --accent-2:#5CE1E6; --accent-ink:#04121F;
  --gold:#FFD166; --gold-ink:#1F1600;
  --ok:#5CE1E6; --ok-bg:rgba(92,225,230,.12); --bad:#FF4D5E; --bad-bg:rgba(255,77,94,.12); --warn:#FFD166; --warn-bg:rgba(255,209,102,.10);
  --mg:#FF79C6; --acc-rgb:59,158,255;
  --glow:0 0 0 1px rgba(59,158,255,.35),0 0 28px rgba(59,158,255,.22);
  --grid-line:rgba(59,158,255,.045);
  --display:"Chakra Petch","Segoe UI",system-ui,sans-serif;
  --body:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
}
:root.v2[data-theme="light"]{
  --accent:#1F6FE0; --accent-2:#0A8FA0; --accent-ink:#FFFFFF; --gold:#B07800; --ok:#0A8FA0; --ok-bg:#E0F5F7; --bad:#D63347; --bad-bg:#FCE6E9; --mg:#C0368A;
  --acc-rgb:31,111,224;
}
:root.v2 body::before{background:
   radial-gradient(900px 500px at 85% -10%,rgba(var(--acc-rgb),.16),transparent 60%),
   radial-gradient(700px 420px at -10% 10%,rgba(92,225,230,.06),transparent 60%),
   linear-gradient(var(--grid-line) 1px,transparent 1px) 0 0/48px 48px,
   linear-gradient(90deg,var(--grid-line) 1px,transparent 1px) 0 0/48px 48px;}
:root.v2 .eyebrow{color:var(--accent-2)}
:root.v2 .logo{font-family:var(--mono);font-weight:700;letter-spacing:-.01em}
.logo .logoic{display:inline-grid;place-items:center;width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,#5CC0FF,#2F7BFF);color:#fff;font-family:var(--mono);font-weight:700;font-size:14px;letter-spacing:-.04em;box-shadow:0 0 16px rgba(59,158,255,.45)}

/* header XP chip + terminal navigation */
.xpchip{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12.5px;border:1px solid var(--line);border-radius:999px;padding:6px 12px;color:var(--muted);text-decoration:none;white-space:nowrap}
.xpchip:hover{border-color:var(--accent);text-decoration:none}
.xpchip .r{font-weight:700}.xpchip .x{color:var(--gold)}
@media (max-width:560px){.xpchip .x{display:none}}
.fab{position:fixed;right:calc(18px + env(safe-area-inset-right,0px));bottom:calc(18px + env(safe-area-inset-bottom,0px));z-index:45;width:54px;height:54px;border-radius:16px;border:1px solid var(--accent);background:#07090C;color:var(--accent);font-family:var(--mono);font-weight:700;font-size:16px;cursor:pointer;box-shadow:0 10px 30px -8px rgba(var(--acc-rgb),.6)}
.pal{position:fixed;inset:0;z-index:60;background:rgba(3,4,8,.7);display:grid;place-items:end center;padding:16px 16px calc(16px + env(safe-area-inset-bottom,0px))}
.pal[hidden]{display:none}
.palin{width:min(640px,100%);border-radius:16px;overflow:hidden;font-family:var(--mono);font-size:13.5px}
.palhead{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-bottom:1px solid var(--line);color:var(--dim)}
.palhead b{color:var(--accent-2)}
.palhead button{background:transparent;border:0;color:#fff;cursor:pointer;font-size:16px}
.pallog{max-height:240px;overflow-y:auto;padding:12px 14px;color:#D7DCE4}
.pallog div{white-space:pre-wrap;word-break:break-word}
.palform{display:flex;gap:8px;align-items:center;padding:10px 14px;border-top:1px solid var(--line)}
.palform label{color:var(--accent-2);white-space:nowrap}
.palform input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:#fff;font:inherit}

/* glowing terminal windows */
.glow-win,.palin,.ml-win{border:1px solid rgba(var(--acc-rgb),.45);background:linear-gradient(180deg,#0D1322,#070A12);box-shadow:0 0 0 1px rgba(var(--acc-rgb),.12),0 0 28px rgba(var(--acc-rgb),.25),0 0 90px rgba(var(--acc-rgb),.12);border-radius:16px;overflow:hidden}
.c-cy{color:#5CE1E6}.c-yl{color:#FFD166}.c-mg{color:#FF79C6}.c-rd{color:#FF4D5E}.c-mu{color:#8A93A0}.c-bl{color:#3B9EFF}

/* new note blocks */
.callout.warn{border-color:color-mix(in srgb,var(--bad) 40%,transparent);background:var(--bad-bg)}
.callout.warn svg,.callout.warn b{color:var(--bad)}
.codeblk{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:0 0 18px;background:#070B14}
.codebar{display:flex;align-items:center;gap:6px;padding:8px 12px;background:var(--card-2);border-bottom:1px solid var(--line);font-size:12px;color:var(--dim)}
.codebar .d{width:10px;height:10px;border-radius:50%;background:#FF5F57}.codebar .d:nth-child(2){background:#FEBC2E}.codebar .d:nth-child(3){background:#28C840}
.codebar .mono{margin-left:8px;flex:1}
.copybtn{background:transparent;border:1px solid var(--line);border-radius:7px;color:var(--muted);cursor:pointer;padding:3px 6px;display:grid;place-items:center}
.copybtn svg{width:15px;height:15px}
.codeblk pre{margin:0;padding:14px 16px;overflow-x:auto;font-family:var(--mono);font-size:13.5px;line-height:1.6;color:#E3E8F2}
:root[data-theme="light"] .codeblk{background:#0B1120}
.diagram-box{display:grid;grid-template-columns:30px 1fr;gap:12px;margin:0 0 18px;padding:16px;border:1px dashed color-mix(in srgb,var(--accent) 55%,transparent);border-radius:12px;background:color-mix(in srgb,var(--accent) 6%,var(--card))}
.diagram-box svg{width:22px;height:22px;color:var(--accent)}
.diagram-box b{display:block;font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:4px}
.diagram-box figcaption{color:var(--muted);font-size:15px}
.flips{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;margin:0 0 18px}
.flipc{position:relative;min-height:150px;border:1px solid var(--line-2);border-radius:14px;background:var(--card-2);color:var(--text);cursor:pointer;padding:0;text-align:left;perspective:900px}
.flipc .fr,.flipc .bk{position:absolute;inset:0;padding:16px;display:flex;flex-direction:column;gap:6px;justify-content:center;border-radius:14px;backface-visibility:hidden;transition:transform .45s ease;font-size:15px}
.flipc small{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-2)}
.flipc .bk{transform:rotateY(180deg);background:color-mix(in srgb,var(--accent) 12%,var(--card-2))}
.flipc.on .fr{transform:rotateY(180deg)}.flipc.on .bk{transform:rotateY(360deg)}
.flipc:hover{border-color:var(--accent)}
.why{display:flex;gap:8px;align-items:flex-start;margin:10px 0 0;padding:10px 12px;border-radius:10px;background:color-mix(in srgb,var(--accent-2) 8%,var(--card));color:var(--muted);font-size:14.5px}
.why svg{width:18px;height:18px;flex:none;color:var(--accent-2);margin-top:2px}
.vtag{font-weight:700}.vtag.new{color:var(--accent-2)}.vtag.old{color:var(--gold)}
.ccard.planned{border-style:dashed}
.ccard.planned .icon{opacity:.75}
.filters .cnt{opacity:.6;margin-left:4px;font-size:.9em}
.xpv{color:var(--gold)}

/* mission lab */
.ml-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;background:linear-gradient(180deg,#141B2C,#0E1424);border-bottom:1px solid rgba(var(--acc-rgb),.18)}
.ml-bar .d{width:12px;height:12px;border-radius:50%}
.ml-url{flex:1;margin-left:6px;background:#0A0F1B;border:1px solid #1E2740;border-radius:8px;padding:5px 10px;color:#9AA6BF;font-family:var(--mono);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ml-count{font-size:12px;color:#FFD166}
.ml-body{padding:16px;display:grid;gap:14px;max-height:none}
.ml-story{margin:0;color:#C9CFD8}.ml-story b{color:#5CE1E6;font-family:var(--mono)}
.ml-step{border:1px solid #1B2741;border-radius:12px;padding:14px;background:#08101F;display:grid;gap:10px;color:#E3E8F2}
.ml-head{display:flex;justify-content:space-between;gap:10px;font-size:12px}
.ml-n{color:#3B9EFF;font-weight:700}.ml-mode{color:#8A93A0;font-family:var(--mono)}
.ml-goal{margin:0}
.ml-hint summary{cursor:pointer;color:#FFD166;font-family:var(--mono);font-size:13px}
.ml-hint p{margin:6px 0 0;color:#C9CFD8;font-size:14.5px}
.ml-prompt{display:flex;gap:8px;align-items:center;flex-wrap:wrap;border:1px solid #1B2741;border-radius:10px;padding:8px 10px;background:#050A15}
.ml-prompt label{color:#5CE1E6;font-size:13px;white-space:nowrap}
.ml-prompt input{flex:1;min-width:140px;background:transparent;border:0;outline:none;color:#fff;font-family:var(--mono);font-size:14px}
.ml-text{width:100%;background:#050A15;border:1px solid #1B2741;border-radius:10px;padding:10px;color:#fff;font-family:var(--mono);font-size:13.5px;resize:vertical}
.ml-res:empty{display:none}
.ml-res code{font-family:var(--mono);color:#5CE1E6}

/* ---------- v2 home page (scoped to .nh) ---------- */
.is-home main{padding-top:8px}
.nh{display:block}
.nh h1,.nh h2,.nh h3{color:var(--text)}
.nh h2{font-size:clamp(26px,4.4vw,38px)}
.nh .lead{color:var(--muted);max-width:62ch;margin:0}
.nh .glowr{text-shadow:0 0 18px rgba(255,77,94,.55)}
.nh .c-cy{text-shadow:0 0 16px rgba(92,225,230,.35)}
.nh-hero{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center;padding:36px 0 48px}
.nh-hero h1{font-size:clamp(40px,7vw,66px);letter-spacing:-.01em;line-height:1.05}
.nh-copy{display:grid;gap:18px;min-width:0}
.nh-ladder{font-family:var(--mono);font-size:14px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;color:var(--dim)}
.nh-ladder b{font-weight:600}
.nh .trust{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:14px;color:var(--muted)}
.nh .trust span{display:flex;gap:6px;align-items:center}.nh .trust svg{width:16px;height:16px;color:var(--accent-2)}
@media (max-width:900px){.nh-hero{grid-template-columns:1fr}}
.nh-term{min-width:0}
.nh-screen{position:relative;font-family:var(--mono);font-size:13.5px;line-height:1.65;padding:16px;height:320px;overflow-y:auto;color:#E3E8F2;background:radial-gradient(90% 70% at 50% 35%,rgba(var(--acc-rgb),.10),transparent 70%),#080B14}
.nh-screen div{white-space:pre-wrap;word-break:break-word}
.nh-screen a{color:#E3E8F2;text-decoration:underline}
.nh-prompt{display:flex;gap:8px;align-items:center;border-top:1px solid #1B2741;padding:10px 16px;background:#0A0E19}
.nh-prompt label{font-family:var(--mono);font-size:13px;color:#5CE1E6;white-space:nowrap}
.nh-prompt input{flex:1;min-width:0;background:transparent;border:0;color:#fff;font-family:var(--mono);font-size:14px;outline:none}
.nh-chips{display:flex;gap:6px;flex-wrap:wrap;padding:0 16px 12px;background:#0A0E19}
.nh-chips button{font-family:var(--mono);font-size:12px;color:#8A93A0;background:#0B1324;border:1px solid #1B2741;border-radius:6px;padding:4px 8px;cursor:pointer}
.nh-chips button:hover{color:#fff;border-color:#3B9EFF}
.nh-nums{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:8px}
.nh-nums div{border-left:2px solid var(--accent);padding:4px 0 4px 14px}
.nh-nums b{display:block;font-family:var(--display);color:var(--text);font-size:32px}
.nh-nums span{color:var(--dim);font-size:14px}
@media (max-width:720px){.nh-nums{grid-template-columns:repeat(2,1fr)}}
.nh-sec{padding-block:56px;border-top:1px solid var(--line)}
.nh-sec>header{display:grid;gap:10px;margin-bottom:26px}
.nh-cgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media (max-width:860px){.nh-cgrid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:480px){.nh-cgrid{grid-template-columns:1fr}}
.nh-cc{background:var(--card);border:1px dashed var(--line-2);border-radius:12px;padding:14px;display:grid;gap:6px;color:inherit;min-width:0}
.nh-cc.ready{border-style:solid;border-color:rgba(var(--acc-rgb),.45)}
.nh-cc:hover{border-color:var(--accent);text-decoration:none;box-shadow:var(--glow)}
.nh-cc .ct{font-size:11px;color:var(--accent-2);letter-spacing:.06em;text-transform:uppercase}
.nh-cc .cn{font-family:var(--display);color:var(--text);font-size:16.5px;line-height:1.25;font-weight:600}
.nh-cc .cf{font-size:11.5px;color:var(--dim)}
.nh .appwin.glow-win{border-radius:16px}
.nh-pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media (max-width:860px){.nh-pgrid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:440px){.nh-pgrid{grid-template-columns:1fr}}
.nh-pdf{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;display:grid;gap:8px;align-content:start}
.nh-pdf .pg{font-family:var(--mono);font-size:11px;color:var(--dim);display:flex;justify-content:space-between}
.nh-pdf h3{font-size:16px}.nh-pdf p{margin:0;color:var(--dim);font-size:14px}.nh-pdf .btn{justify-self:start}
.nh-ladder2{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.nh .rung{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;display:grid;gap:6px;position:relative}
.nh .rung .nm{font-family:var(--mono);font-weight:700;font-size:17px}
.nh .rung .th{font-family:var(--mono);font-size:12px;color:var(--dim)}
.nh .rung p{margin:0;font-size:14px;color:var(--dim)}
.nh .rung.done{border-color:rgba(var(--acc-rgb),.35)}
.nh .rung.now{border-color:var(--accent);background:linear-gradient(180deg,rgba(var(--acc-rgb),.14),var(--card) 70%)}
.nh .rung.now::after{content:"you are here";position:absolute;top:-10px;right:12px;font-family:var(--mono);font-size:10.5px;background:var(--accent);color:var(--accent-ink);padding:2px 8px;border-radius:999px;font-weight:700}
@media (max-width:820px){.nh-ladder2{grid-template-columns:repeat(2,1fr)}.nh-ladder2 .rung:last-child{grid-column:span 2}}
.nh-meter{margin-top:22px;display:grid;gap:8px}
.nh-meter .track{height:10px;background:var(--card-2);border-radius:999px;overflow:hidden;border:1px solid var(--line)}
.nh-meter .fill{height:100%;background:linear-gradient(90deg,#3B9EFF,#5CE1E6);box-shadow:0 0 14px rgba(59,158,255,.6)}
.nh-meter .lbl{display:flex;justify-content:space-between;font-family:var(--mono);font-size:13px;color:var(--dim);flex-wrap:wrap;gap:6px}
.nh-tree-scroll{overflow-x:auto;padding-bottom:8px}
.nh-tree{min-width:860px;display:grid;justify-items:center}
.nh .node{font-family:var(--mono);font-size:12px;border:1px solid var(--line);background:var(--card);border-radius:10px;padding:10px 12px;width:136px;text-align:center;color:var(--dim);display:block}
.nh .node:hover{text-decoration:none;border-color:var(--accent)}
.nh .node b{display:block;color:var(--text);font-size:12.5px;margin-bottom:2px}
.nh .node.done{border-color:var(--accent);color:var(--accent);box-shadow:0 0 18px -4px rgba(var(--acc-rgb),.55)}
.nh .node.open{border-color:var(--accent-2);color:var(--accent-2)}
.nh .node.locked{opacity:.6}
.nh .trunk{width:2px;height:28px;background:var(--accent)}
.nh .branches{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;width:100%;position:relative;padding-top:28px}
.nh .branches::before{content:"";position:absolute;top:0;left:calc(100%/12);right:calc(100%/12);height:2px;background:var(--line)}
.nh .branches .col{display:grid;justify-items:center;position:relative}
.nh .branches .col::before{content:"";position:absolute;top:-28px;left:50%;width:2px;height:28px;background:var(--line);transform:translateX(-1px)}
.nh .branches .col.lit::before{background:var(--accent)}
.nh .branches .head{font-family:var(--display);color:var(--text);font-size:15px;margin-bottom:8px;font-weight:600}
.nh .stem{width:2px;height:14px;background:var(--line)}.nh .stem.lit{background:var(--accent)}
.nh-legend{display:flex;gap:16px;flex-wrap:wrap;font-family:var(--mono);font-size:12.5px;color:var(--dim);margin-top:14px}
.nh-legend span::before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;vertical-align:-1px;border:1px solid}
.nh-legend .l1::before{border-color:var(--accent);background:rgba(var(--acc-rgb),.14)}.nh-legend .l2::before{border-color:var(--accent-2)}.nh-legend .l3::before{border-color:var(--line-2)}
.nh-flow{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.nh .step2{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;display:grid;gap:8px;align-content:start}
.nh .step2 .n{font-size:12.5px}.nh .step2 h3{font-size:17px}.nh .step2 p{margin:0;color:var(--dim);font-size:14.5px}
@media (max-width:820px){.nh-flow{grid-template-columns:repeat(2,1fr)}}
@media (max-width:460px){.nh-flow{grid-template-columns:1fr}}
.nh-duo{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:820px){.nh-duo{grid-template-columns:1fr}}
.nh-box{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;display:grid;gap:14px;align-content:start;min-width:0}
.nh-box .tag{display:flex;justify-content:space-between;font-family:var(--mono);font-size:12.5px;color:var(--dim);flex-wrap:wrap;gap:6px}
.nh-box .q{font-family:var(--display);font-size:19px;margin:0;color:var(--text);font-weight:600}
.nh-box .opts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.nh-box .opts button{font-family:var(--mono);font-size:14px;padding:12px;border-radius:10px;border:1px solid var(--line);background:var(--card-2);color:var(--text);cursor:pointer;text-align:left}
.nh-box .opts button:hover:not(:disabled){border-color:var(--accent)}
.nh-box .opts button.right{border-color:var(--ok);color:var(--ok)}.nh-box .opts button.wrong{border-color:var(--bad);color:var(--bad)}
.nh-box .fb{font-size:14.5px;color:var(--dim);margin:0}
.nh-box .msg{background:var(--bg-2);border:1px solid var(--line);border-radius:12px;padding:14px;font-size:15px;display:grid;gap:4px}
.nh-box .msg .from{font-size:12px;color:var(--dim)}
.nh-box .score{font-size:12.5px;color:var(--dim)}
.nh-arcade{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.nh .game{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;display:grid;gap:6px;align-content:start}
.nh .game .ic{font-size:19px;font-weight:700}.nh .game h3{font-size:16px}.nh .game p{margin:0;color:var(--dim);font-size:14px}.nh .game .xp{font-size:11.5px;color:var(--dim)}
.nh .game.live{border-color:var(--mg)}
@media (max-width:820px){.nh-arcade{grid-template-columns:repeat(2,1fr)}}
.nh-cardrow{display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:center}
@media (max-width:760px){.nh-cardrow{grid-template-columns:1fr;justify-items:center}}
.nh .rcard{width:260px;max-width:100%;aspect-ratio:9/16;border-radius:22px;padding:22px;display:flex;flex-direction:column;justify-content:space-between;color:#C9CFD8;background:radial-gradient(90% 60% at 50% 30%,rgba(59,158,255,.22),transparent 70%),#07090C;border:1px solid rgba(59,158,255,.4);box-shadow:0 30px 80px -30px rgba(59,158,255,.45)}
.nh .rcard .top-l{font-size:12px;color:#8A93A0}
.nh .rcard .big{font-weight:700;font-size:42px;line-height:1}
.nh .rcard .who{font-family:var(--display);color:#fff;font-size:21px}
.nh .rcard .stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:12px}
.nh .rcard .stats div{border:1px solid #1B2741;border-radius:10px;padding:8px}
.nh .rcard .stats b{display:block;color:#fff;font-size:16px}
.nh .rcard .foot{font-size:11.5px;color:#8A93A0;text-align:center}
/* fix: inline icons in course hero rows and status boxes kept their full size (old "big lab icon" bug) */
.course-hero .row svg,.status>svg,.status svg{width:18px;height:18px;flex:none}
.status.info{align-items:center}

/* fallbacks so new components look right with the old theme */
:root{--acc-rgb:91,140,255;--mg:#FF79C6}
:root[data-theme="light"]{--acc-rgb:47,100,240;--mg:#C0368A}

/* ---------- nav with 8 items + footer v2 ---------- */
.nav a{font-size:14px;padding:8px 9px}
@media (max-width:1240px){.nav a{font-size:13.5px;padding:7px 7px}}
.ftr .cols.cols2{grid-template-columns:minmax(220px,1fr) minmax(0,3fr);gap:36px}
.ftr .fcols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px 28px}
@media (max-width:900px){.ftr .cols.cols2{grid-template-columns:1fr}.ftr .fcols{grid-template-columns:repeat(2,minmax(0,1fr))}}
.ftr a.logo{display:inline-flex;align-items:center;gap:10px;padding:0}
.ftr a.logo span{font-size:20px}
.socials{display:flex;flex-wrap:wrap;gap:8px}
.ftr .socials a{display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--line-2);border-radius:10px;padding:0;color:var(--muted)}
.ftr .socials a:hover{color:var(--accent-2);border-color:var(--accent);text-decoration:none;box-shadow:0 0 14px rgba(91,140,255,.35)}
.socials svg{width:19px;height:19px}
.ftr .ethic{display:flex;gap:8px;align-items:center;margin:30px 0 0;padding:12px 14px;border:1px solid color-mix(in srgb,var(--bad) 35%,transparent);background:var(--bad-bg);border-radius:10px;color:var(--text)}
.ftr .ethic svg{width:18px;height:18px;flex:none;color:var(--bad)}
.ftr .bottom{padding-right:70px}
.fexit{color:var(--accent-2)}
.cur{display:inline-block;width:.55em;height:1em;background:var(--accent-2);margin-left:4px;vertical-align:-2px;animation:rjblink 1.1s steps(1) infinite}
@keyframes rjblink{50%{opacity:0}}
@media (prefers-reduced-motion:reduce){.cur{animation:none}}

/* ---------- cyber home (old colours, terminal touches) ---------- */
.ticker{display:flex;align-items:center;gap:12px;border:1px solid color-mix(in srgb,var(--bad) 30%,var(--line));background:color-mix(in srgb,var(--bad) 6%,var(--card));border-radius:10px;padding:8px 12px;overflow:hidden;margin-top:-8px}
.tk-tag{flex:none;font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--bad);border:1px solid color-mix(in srgb,var(--bad) 50%,transparent);border-radius:6px;padding:2px 7px}
.tk-track{overflow:hidden;flex:1;mask-image:linear-gradient(90deg,transparent,#000 4%,#000 96%,transparent)}
.tk-move{display:inline-flex;gap:18px;white-space:nowrap;animation:rjtick 70s linear infinite;font-size:14px;color:var(--muted)}
.tk-move i{color:var(--bad);font-style:normal}
.ticker:hover .tk-move{animation-play-state:paused}
@keyframes rjtick{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.tk-move{animation:none}}
.tprompt{font-size:13px;color:var(--dim);margin-bottom:6px}
.tprompt span{color:var(--accent-2)}
.cwin{min-width:0;border-radius:18px}
.cw-bar{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid rgba(var(--acc-rgb),.2);background:linear-gradient(180deg,#141B2C,#0E1424)}
.cw-bar .d{width:12px;height:12px;border-radius:50%;flex:none}
.cw-tabs{display:flex;gap:4px;margin-left:8px;overflow-x:auto}
.cw-tabs button{border:0;background:transparent;color:#97A5C2;font-family:var(--mono);font-weight:700;font-size:12.5px;padding:6px 10px;border-radius:7px;cursor:pointer;white-space:nowrap}
.cw-tabs button.on{background:#18243F;color:#fff;box-shadow:inset 0 -2px 0 #38C6E8}
.cw-body{padding:14px;min-height:330px;background:radial-gradient(90% 70% at 50% 35%,rgba(var(--acc-rgb),.08),transparent 70%),#080B14;color:#E3E8F2}
.cw-body a{color:#38C6E8}
.cw-foot{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;border-top:1px solid #1B2741;padding:9px 14px;font-size:12px;color:#6B7894;background:#0A0E19}
.cy-scr{font-family:var(--mono);font-size:13.5px;line-height:1.65;height:220px;overflow-y:auto;padding:4px 2px}
.cy-scr div{white-space:pre-wrap;word-break:break-word}
.cy-prompt{display:flex;gap:8px;align-items:center;flex-wrap:wrap;border:1px solid #1B2741;border-radius:10px;padding:8px 10px;background:#050A15;margin-top:8px}
.cy-prompt label,.cy-prompt>span{font-size:13px;white-space:nowrap;color:#38C6E8}
.cy-prompt input{flex:1;min-width:120px;background:transparent;border:0;outline:none;color:#fff;font-family:var(--mono);font-size:14px}
.cy-chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.cy-chips button{font-family:var(--mono);font-size:12px;color:#97A5C2;background:#0F1729;border:1px solid #1B2741;border-radius:6px;padding:4px 8px;cursor:pointer}
.cy-chips button:hover{color:#fff;border-color:#5B8CFF}
.cy-msg{display:grid;gap:4px;background:#0B1120;border:1px solid #1B2741;border-radius:12px;padding:14px;font-size:15px}
.cy-msg .mono{font-size:12px}
.cy-opts{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0}
.cy-opts button{font-family:var(--mono);font-size:14px;padding:11px;border-radius:10px;border:1px solid #1B2741;background:#131E35;color:#fff;cursor:pointer}
.cy-opts button:hover:not(:disabled){border-color:#5B8CFF}
.cy-opts button.right{border-color:#38C6E8;color:#38C6E8}.cy-opts button.wrong{border-color:#FF6B6B;color:#FF6B6B}
.cy-fb{font-size:14px;color:#97A5C2;margin:6px 0}
.cy-big{font-family:var(--display);font-size:20px;font-weight:700;margin:6px 0}
.cy-code{background:#050A15;border:1px dashed #26365A;border-radius:10px;padding:12px;word-break:break-all;color:#FFC65C;font-size:14px}
.cy-meter{height:8px;border-radius:999px;background:#131E35;margin-top:12px;overflow:hidden}
.cy-meter i{display:block;height:100%;width:0;transition:width .3s,background .3s}
.c-cy{color:#38C6E8}.c-yl{color:#FFC65C}.c-rd{color:#FF6B6B}.c-mu{color:#7F8BA6}.c-bl{color:#5B8CFF}
.plan{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:10px}
@media (max-width:1000px){.plan{grid-template-columns:repeat(2,minmax(0,1fr))}}
.wotd{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:16px}
.wotd div{flex:1;min-width:220px}
.card.hover:hover,.nh-cc:hover{box-shadow:0 0 0 1px rgba(91,140,255,.45),0 0 26px -6px rgba(91,140,255,.5)}

/* ---------- challenges + tools ---------- */
.chal h2,.th{font-size:20px;margin:12px 0 6px;display:flex;gap:8px;align-items:center}
.th svg{width:20px;height:20px;color:var(--accent-2)}
.cwbox{margin-top:12px;border:1px solid #1B2741;border-radius:12px;padding:12px;background:#080B14;color:#E3E8F2}
.cwbox a{color:#38C6E8}
.cwbox .btn{color:var(--text)}
:root[data-theme="light"] .cwbox .btn:not(.pri){color:#E3E8F2;background:#131E35;border-color:#26365A}
.bugcode{display:grid;gap:2px;border:1px solid #1B2741;border-radius:10px;overflow:hidden}
.bugcode button{display:flex;gap:10px;align-items:baseline;text-align:left;background:#050A15;border:0;border-left:3px solid transparent;color:#E3E8F2;padding:7px 10px;cursor:pointer;font-family:var(--mono);font-size:12.5px;overflow-x:auto}
.bugcode button:hover:not(:disabled){border-left-color:#5B8CFF;background:#0B1120}
.bugcode button.right{border-left-color:#38C6E8;background:rgba(56,198,232,.1)}
.bugcode button.wrong{border-left-color:#FF6B6B;background:rgba(255,107,107,.08)}
.bugcode .ln{color:#6B7894;min-width:14px}
.bugcode code{white-space:pre}
.nav{gap:0;min-width:0}
.nav a{white-space:nowrap}
@media (max-width:1360px){.nav a{font-size:13.5px;padding:7px 7px}}
@media (max-width:1180px){.nav a{font-size:13px;padding:6px 5px}.hdr .btn.ghost{display:none}.xpchip .x{display:none}}
.ftr .socials a{width:34px;height:34px}
.socials svg{width:17px;height:17px}