@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{
  --bg:#0a0f0c; --bg2:#0d1512; --panel:#111c16; --panel2:#16271d; --ink:#e9f5ee; --soft:#8fb3a2;
  --line:rgba(255,255,255,.10); --green:#34d399; --lime:#a3e635; --cyan:#22d3ee; --amber:#fbbf24;
  --rose:#fb7185; --blue:#60a5fa; --violet:#a78bfa; --p:var(--green);
  --disp:"Space Grotesk",ui-sans-serif,system-ui,sans-serif;
  --sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Code",monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:
    radial-gradient(1000px 500px at 85% -5%,rgba(52,211,153,.12),transparent 60%),
    radial-gradient(900px 500px at 5% 0%,rgba(163,230,53,.08),transparent 55%),
    linear-gradient(180deg,var(--bg),var(--bg2));background-attachment:fixed;color:var(--ink);line-height:1.6}
h1,h2,h3,h4{font-family:var(--disp);line-height:1.15;font-weight:700}
a{color:var(--green)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
.mono{font-family:var(--mono)}
img{max-width:100%;display:block}

/* NAV */
nav{position:sticky;top:0;z-index:50;background:rgba(10,15,12,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
nav .wrap{display:flex;flex-wrap:wrap;gap:3px;align-items:center;padding:9px 20px}
nav .brand{font-family:var(--disp);font-weight:700;color:var(--p);margin-right:auto;font-size:1rem;text-decoration:none}
nav a{color:#bfd6cb;text-decoration:none;font-size:.8rem;padding:5px 9px;border-radius:7px;white-space:nowrap}
nav a:hover{background:var(--panel);color:#fff}
nav a.home{color:var(--soft)}

/* HERO */
header.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
header.hero .bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.5}
header.hero .ov{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,15,12,.55),rgba(10,15,12,.92))}
header.hero .wrap{position:relative;padding:60px 20px 54px;text-align:center}
.eyebrow{font-family:var(--mono);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:var(--lime);
  border:1px solid rgba(163,230,53,.35);background:rgba(163,230,53,.08);padding:5px 13px;border-radius:100px;display:inline-block}
header.hero h1{font-size:clamp(2rem,6vw,3.4rem);margin:18px 0 10px;
  background:linear-gradient(90deg,#86efac,#d9f99d);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
header.hero p{color:#cfe4d8;max-width:660px;margin:0 auto;font-size:1.06rem}
.prereq{margin-top:14px;font-size:.9rem;color:#b0cabc}.prereq a{color:var(--lime);font-weight:700}
.btn{display:inline-block;background:var(--p);color:#06140d;font-family:var(--disp);font-weight:700;border:none;
  padding:13px 26px;border-radius:100px;font-size:1rem;cursor:pointer;text-decoration:none;transition:transform .12s;margin-top:20px}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn.sm{padding:9px 18px;font-size:.9rem;margin-top:0}

/* SECTIONS */
section{padding:42px 0;border-bottom:1px solid var(--line)}
.kicker{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--p);font-weight:600}
h2{font-size:clamp(1.55rem,3.4vw,2.1rem);margin:8px 0 14px}
.lead{font-size:1.05rem;color:#d6e6dd;max-width:780px}
p.body{color:#c2d6cb;margin:12px 0;max-width:780px}
strong{color:#fff}
.section-photo{border-radius:16px;overflow:hidden;margin:18px 0;border:1px solid var(--line);box-shadow:0 18px 40px rgba(0,0,0,.4)}
.section-photo img{width:100%;height:clamp(150px,24vw,240px);object-fit:cover;opacity:.94}

/* CALLOUTS */
.callout{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--p);border-radius:0 12px 12px 0;padding:15px 18px;margin:16px 0;color:#d6e6dd;font-size:.97rem}
.callout.warn{border-left-color:var(--amber)}
.callout.key{border-left-color:var(--cyan)}
.callout.spoiler{border-left-color:var(--amber);background:rgba(251,191,36,.06)}
.callout b{color:#fff}
.law{background:linear-gradient(120deg,rgba(52,211,153,.1),rgba(163,230,53,.06));border:1px solid rgba(52,211,153,.3);
  border-left:4px solid var(--lime);border-radius:0 12px 12px 0;padding:16px 18px;margin:18px 0}
.law .n{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--lime);font-weight:700}
.law .t{font-family:var(--disp);font-weight:700;font-size:1.15rem;color:#fff;margin:3px 0 6px}
.law p{color:#cfe4d8;font-size:.95rem}

/* GRID + CARDS */
.grid{display:grid;gap:14px;margin-top:16px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:820px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:linear-gradient(180deg,var(--panel),var(--panel2));border:1px solid var(--line);border-radius:14px;padding:18px}
.card h4{color:#fff;font-size:1.02rem;margin-bottom:6px}
.card p{color:#bcd0c5;font-size:.9rem}
.card .ic{font-size:1.6rem;margin-bottom:8px}

/* VOCAB CONTRACT */
.vocab{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}
@media(max-width:640px){.vocab{grid-template-columns:repeat(2,1fr)}}
.vc{background:var(--panel);border:1px solid var(--line);border-top:3px solid var(--p);border-radius:12px;padding:14px;text-align:center}
.vc .w{font-family:var(--mono);font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--lime);font-weight:700}
.vc .d{font-size:.86rem;color:#c2d6cb;margin-top:5px}

/* FLIP */
.flip{background:transparent;height:170px;perspective:1000px;cursor:pointer}
.flip-in{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flip.on .flip-in{transform:rotateY(180deg)}
.flip-f,.flip-b{position:absolute;inset:0;backface-visibility:hidden;border-radius:14px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;padding:14px;text-align:center;border:1px solid var(--line)}
.flip-f{background:linear-gradient(180deg,var(--panel),var(--panel2))}
.flip-f .emoji{font-size:2rem}.flip-f .rname{font-family:var(--disp);font-weight:700;color:#fff;margin-top:6px}
.flip-f .tap{font-size:.7rem;color:var(--soft);margin-top:6px}
.flip-b{background:linear-gradient(135deg,#0f2a1e,#123626);color:#dff3e8;transform:rotateY(180deg);font-size:.86rem}

/* STEPPER */
.stepper{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;margin-top:16px}
.track{display:flex;gap:6px;margin-bottom:14px;flex-wrap:wrap}
.stp{flex:1;min-width:56px;text-align:center;padding:8px 4px;border-radius:8px;background:var(--panel2);font-size:.66rem;font-weight:700;color:var(--soft);font-family:var(--mono);transition:.2s}
.stp.on{background:var(--p);color:#06140d}.stp.done{background:rgba(163,230,53,.16);color:var(--lime)}
.stepbox{min-height:66px;color:#d6e6dd}.stepbox .big{font-family:var(--disp);color:#fff;font-weight:700;font-size:1.05rem;display:block;margin-bottom:3px}
.stepctrl{display:flex;gap:10px;margin-top:12px}

/* REVEAL-EXPAND */
.rev{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px;cursor:pointer;transition:.15s}
.rev:hover{border-color:var(--p)}
.rev .rh{display:flex;align-items:center;gap:10px}
.rev .rh .ic{font-size:1.5rem}.rev .rh h4{color:#fff;font-size:1.02rem;flex:1}
.rev .rh .chev{color:var(--p);transition:transform .3s}.rev.on .rh .chev{transform:rotate(90deg)}
.rev .body{max-height:0;overflow:hidden;transition:max-height .4s;color:#c8ddd2;font-size:.92rem}
.rev.on .body{max-height:320px;margin-top:10px}
.rev .body .dig{margin-top:8px;color:var(--lime);font-size:.86rem;font-weight:600}

/* QUIZ + GAME */
.qcard{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px;margin:12px 0}
.qcard p.q{font-weight:600;color:#fff;margin-bottom:10px;font-family:var(--disp)}
.qopt{display:block;width:100%;text-align:left;padding:10px 12px;margin:6px 0;border:1px solid var(--line);background:var(--panel2);color:var(--ink);border-radius:9px;cursor:pointer;font-size:.94rem}
.qopt:hover{border-color:var(--p)}
.qopt.correct{border-color:var(--lime);background:rgba(163,230,53,.14)}.qopt.wrong{border-color:var(--rose);background:rgba(251,113,133,.12)}
.qexp{font-size:.86rem;color:#a9c6ba;margin-top:8px;display:none}.qexp.show{display:block}
.game{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px;margin-top:16px}
.scorepill{float:right;background:rgba(52,211,153,.14);color:var(--green);font-family:var(--mono);font-weight:600;padding:4px 12px;border-radius:20px;font-size:.82rem}
.scenario{font-size:1.1rem;min-height:48px;font-weight:600;color:#fff;font-family:var(--disp)}
.choices{display:flex;gap:12px;flex-wrap:wrap;margin:14px 0}
.choice{flex:1;min-width:140px;padding:12px;border-radius:10px;border:1px solid var(--line);background:var(--panel2);color:var(--ink);cursor:pointer;font-weight:600;font-family:var(--disp);transition:.15s}
.choice:hover{border-color:var(--p);background:#173026}
.feedback{min-height:38px;font-size:.94rem;margin-top:6px;color:#c8ddd2}
.ok{color:var(--lime);font-weight:700}.no{color:var(--rose);font-weight:700}

/* CONFUSION MATRIX */
.cmwrap{overflow-x:auto;margin-top:16px}
table.cm{border-collapse:collapse;font-family:var(--mono);font-size:.9rem;min-width:340px}
table.cm th,table.cm td{border:1px solid var(--line);padding:9px 12px;text-align:center;color:#d6e6dd}
table.cm th{background:var(--panel2);color:var(--lime);font-size:.78rem}
table.cm td.diag{background:rgba(52,211,153,.14);color:#fff;font-weight:700}
table.cm td.pick{cursor:pointer}table.cm td.pick:hover{background:rgba(163,230,53,.15)}
table.cm td.sel{outline:2px solid var(--lime)}
.cmres{margin-top:12px;font-size:.94rem;color:#c8ddd2;min-height:24px}

/* ARC checklist */
.arc{list-style:none;margin-top:14px;display:flex;flex-direction:column;gap:8px}
.arc li{display:flex;gap:12px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:12px 14px;cursor:pointer;transition:.15s}
.arc li:hover{border-color:var(--p)}
.arc li.done{background:rgba(52,211,153,.08);border-color:rgba(52,211,153,.3)}
.arc .box{flex:0 0 22px;height:22px;border-radius:7px;border:2px solid var(--p);display:grid;place-items:center;font-size:.85rem;color:#06140d;margin-top:1px}
.arc li.done .box{background:var(--p)}.arc li.done .box::after{content:"✓";font-weight:800}
.arc .txt{font-size:.95rem;color:#d6e6dd}.arc li.done .txt{color:#9fc2b2}
.arc .txt b{color:#fff}

/* BADGE (week award) */
.award{display:flex;align-items:center;gap:16px;background:linear-gradient(120deg,#0f2a1e,#13361f);border:1px solid rgba(163,230,53,.3);border-radius:16px;padding:18px 20px;margin-top:18px}
.award .medal{font-size:2.6rem;flex:none}
.award h4{color:var(--lime);font-size:1.1rem}.award p{color:#cfe4d8;font-size:.9rem;margin-top:3px}

/* MISSION */
.mission{background:rgba(96,165,250,.08);border:1px solid rgba(96,165,250,.25);border-left:4px solid var(--blue);border-radius:0 12px 12px 0;padding:16px 18px;margin-top:18px}
.mission .h{font-family:var(--disp);font-weight:700;color:#bfd8ff;margin-bottom:6px}
.mission ul{margin:6px 0 0 18px;color:#cfe0f2;font-size:.93rem}.mission li{margin:4px 0}

/* TEMPERATURE demo */
.tempdemo{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;margin-top:16px}
.tempdemo input[type=range]{width:100%;accent-color:var(--green);margin:10px 0}
.tempdemo .tval{font-family:var(--mono);color:var(--lime);font-weight:700}
.tempdemo .out{font-family:var(--mono);font-size:.98rem;background:var(--panel2);border-radius:10px;padding:14px;min-height:56px;color:#dff3e8;border:1px solid var(--line)}
.tempdemo .vibe{font-size:.85rem;color:var(--soft);margin-top:8px}

/* WEEK MAP (landing) */
.weekmap{display:flex;flex-direction:column;gap:14px;margin-top:18px}
.wk{display:grid;grid-template-columns:64px 1fr auto;gap:16px;align-items:center;background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-left:5px solid var(--c,var(--p));border-radius:16px;padding:16px 18px;text-decoration:none;transition:transform .16s,box-shadow .16s}
.wk:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(0,0,0,.4)}
.wk .num{font-family:var(--disp);font-weight:700;font-size:1.8rem;color:var(--c,var(--p));text-align:center;line-height:1}
.wk .num small{display:block;font-size:.5rem;letter-spacing:.12em;color:var(--soft);font-family:var(--mono);margin-top:3px}
.wk h3{color:#fff;font-size:1.2rem}
.wk .say{color:var(--soft);font-size:.88rem;font-style:italic;margin-top:2px}
.wk .go{color:var(--c,var(--p));font-family:var(--disp);font-weight:700;font-size:.85rem;white-space:nowrap}
@media(max-width:560px){.wk{grid-template-columns:48px 1fr}.wk .go{display:none}}

/* CAPSTONE menu */
.cap{background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.cap-h{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--panel2)}
.cap-h .n{font-family:var(--disp);font-weight:700;color:#fff;flex:1}
.cap-h .lvl{font-family:var(--mono);font-size:.64rem;text-transform:uppercase;letter-spacing:.08em;padding:3px 9px;border-radius:100px}
.lvl.i{background:rgba(96,165,250,.18);color:var(--blue)}.lvl.a{background:rgba(251,113,133,.18);color:var(--rose)}
.cap-b{padding:14px 16px;font-size:.9rem;color:#c2d6cb}.cap-b .r{color:var(--lime);font-size:.83rem;margin-top:8px}

/* DEMO beats */
.beat{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:10px 0;border-left:4px solid var(--p)}
.beat .bh{font-family:var(--disp);font-weight:700;color:#fff}.beat .bt{font-family:var(--mono);font-size:.7rem;color:var(--lime);float:right}
.beat p{font-size:.9rem;color:#c2d6cb;margin-top:5px}

/* FOOTER */
footer{padding:34px 20px 60px;text-align:center;color:var(--soft);font-size:.9rem}
footer .btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}

/* progress bar in nav */
.prog{margin-left:auto;display:flex;align-items:center;gap:9px;font-size:.76rem;color:var(--soft);font-family:var(--mono)}
.bar{width:96px;height:8px;border-radius:20px;background:rgba(255,255,255,.12);overflow:hidden}
.bar i{display:block;height:100%;width:0;border-radius:20px;background:linear-gradient(90deg,var(--green),var(--lime));transition:width .4s}