:root{
  --navy:#061724;--navy2:#09243a;--panel:#0c2b43;--panel2:#103750;--ink:#f6f0df;--muted:#a9c2d0;
  --paper:#f5ead1;--gold:#d5a452;--gold2:#f2c56c;--red:#e96058;--green:#45b88a;--cyan:#60bcd7;--line:rgba(213,164,82,.28);
  --shadow:0 18px 42px rgba(0,0,0,.34);--radius:22px;--safe-bottom:env(safe-area-inset-bottom,0px)
}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--navy);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Arial,sans-serif}body{background:radial-gradient(circle at 70% -10%,#174966 0,transparent 30%),linear-gradient(160deg,#05131f,#08233a 52%,#061724);overscroll-behavior:none}.app-shell{min-height:100dvh;padding-bottom:calc(78px + var(--safe-bottom))}.topbar{position:sticky;top:0;z-index:20;height:72px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;background:linear-gradient(180deg,rgba(4,18,29,.97),rgba(4,18,29,.84));backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.brand{border:0;background:none;color:inherit;display:flex;align-items:center;gap:10px;text-align:left;padding:0}.brand-mark{width:42px;height:42px;border:1px solid var(--gold);border-radius:50%;display:grid;place-items:center;color:var(--gold2);font-size:24px;box-shadow:inset 0 0 0 5px rgba(213,164,82,.08)}.brand strong{font-family:Georgia,"Times New Roman",serif;letter-spacing:.07em;font-size:15px}.brand small{display:block;color:var(--gold2);font-size:8px;letter-spacing:.11em;margin-top:2px}.top-actions{display:flex;gap:6px}.icon-btn{width:42px;height:42px;border-radius:14px;border:1px solid var(--line);background:rgba(12,43,67,.78);color:var(--ink);font-size:18px}.tabbar{position:fixed;bottom:0;left:0;right:0;z-index:30;display:grid;grid-template-columns:repeat(4,1fr);padding:8px 8px calc(8px + var(--safe-bottom));background:rgba(4,18,29,.95);backdrop-filter:blur(18px);border-top:1px solid var(--line)}.tabbar button{border:0;background:none;color:#819dad;padding:6px 3px;border-radius:14px;font-size:21px}.tabbar small{font-size:10px;display:block;margin-top:3px}.tabbar button.active{color:var(--gold2);background:rgba(213,164,82,.09)}main{max-width:980px;margin:0 auto}.page{padding:18px 14px 28px}.eyebrow{color:var(--gold2);text-transform:uppercase;letter-spacing:.14em;font-weight:800;font-size:11px}.page h1,.page h2,.page h3{font-family:Georgia,"Times New Roman",serif}.page h1{font-size:32px;line-height:1.04;margin:7px 0 9px}.lead{color:#c9d8df;line-height:1.5;margin:0}.hero{position:relative;overflow:hidden;border:1px solid rgba(213,164,82,.38);border-radius:28px;background:linear-gradient(145deg,rgba(17,61,88,.96),rgba(5,23,36,.98));box-shadow:var(--shadow);min-height:420px;padding:20px}.hero:before{content:"";position:absolute;inset:auto -18% -32% -18%;height:55%;background:repeating-linear-gradient(0deg,transparent 0 38px,rgba(96,188,215,.08) 39px 40px),repeating-linear-gradient(90deg,transparent 0 52px,rgba(96,188,215,.08) 53px 54px);transform:perspective(500px) rotateX(54deg);transform-origin:bottom}.hero-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;position:relative;z-index:2}.rank-chip,.status-chip{display:inline-flex;gap:7px;align-items:center;border-radius:999px;background:rgba(0,0,0,.22);border:1px solid var(--line);padding:8px 11px;color:#d6e5ea;font-size:12px}.compass-wrap{position:relative;z-index:2;margin:20px auto 12px;width:min(72vw,320px);aspect-ratio:1;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle,#103b55 0 48%,#071e31 49% 64%,#d5a452 64.5% 65.5%,#071e31 66%);box-shadow:0 0 0 1px rgba(213,164,82,.4),inset 0 0 48px rgba(0,0,0,.46),0 24px 48px rgba(0,0,0,.34)}.compass-ring{position:absolute;inset:10%;border:1px dashed rgba(245,234,209,.34);border-radius:50%}.compass-cardinals{position:absolute;inset:0;font-family:Georgia,serif;font-weight:900;color:var(--paper)}.compass-cardinals span{position:absolute}.c-n{top:4%;left:50%;transform:translateX(-50%);color:var(--gold2)}.c-e{right:5%;top:50%;transform:translateY(-50%)}.c-s{bottom:4%;left:50%;transform:translateX(-50%)}.c-w{left:5%;top:50%;transform:translateY(-50%)}.needle{width:4px;height:41%;border-radius:10px;background:linear-gradient(180deg,var(--gold2) 0 48%,#6f8490 49% 100%);transform-origin:50% 100%;position:absolute;left:calc(50% - 2px);bottom:50%;filter:drop-shadow(0 3px 6px #000)}.needle:after{content:"";width:16px;height:16px;background:var(--paper);border:4px solid var(--gold);border-radius:50%;position:absolute;bottom:-10px;left:-6px}.hero-readout{position:relative;z-index:2;display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}.instrument{background:rgba(3,18,29,.66);border:1px solid rgba(96,188,215,.22);border-radius:15px;padding:10px;text-align:center}.instrument small{color:#91aebb;text-transform:uppercase;font-size:9px;letter-spacing:.1em}.instrument strong{display:block;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#eff8f8;font-size:16px;margin-top:4px}.hero-progress{position:relative;z-index:2;margin-top:14px}.progress-row{display:flex;justify-content:space-between;color:#bdd1da;font-size:12px;margin-bottom:7px}.progress-track{height:8px;background:#061622;border-radius:999px;overflow:hidden;border:1px solid rgba(255,255,255,.07)}.progress-fill{height:100%;background:linear-gradient(90deg,#4c99b5,var(--gold2));border-radius:999px}.primary,.secondary,.ghost,.danger{border:0;border-radius:16px;min-height:48px;padding:12px 16px;font-weight:800;font-size:14px;touch-action:manipulation}.primary{background:linear-gradient(180deg,#efc978,#c99645);color:#17212a;box-shadow:0 8px 18px rgba(213,164,82,.2)}.secondary{background:#153e59;color:#ecf5f6;border:1px solid rgba(96,188,215,.26)}.ghost{background:transparent;color:#d5e4e9;border:1px solid rgba(255,255,255,.16)}.danger{background:#4d2226;color:#ffd9d8;border:1px solid rgba(233,96,88,.35)}button:disabled{opacity:.45;filter:saturate(.5)}.cta-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:16px;position:relative;z-index:2}.cta-row>*{flex:1 1 140px}.section-title{display:flex;justify-content:space-between;align-items:end;margin:26px 2px 12px}.section-title h2{margin:0;font-size:22px}.section-title span{color:var(--muted);font-size:12px}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.card{border:1px solid rgba(255,255,255,.09);background:linear-gradient(145deg,rgba(15,49,72,.94),rgba(7,30,47,.94));border-radius:20px;padding:15px;box-shadow:0 12px 26px rgba(0,0,0,.15)}.card h3{margin:3px 0 7px;font-size:17px}.card p{color:#bfd1d9;font-size:13px;line-height:1.42;margin:0}.stat{font-size:27px;font-weight:900;color:var(--gold2);font-family:Georgia,serif}.mission-list{display:grid;gap:9px}.qual-block{margin-bottom:20px}.qual-head{display:flex;align-items:center;gap:12px;padding:12px 2px}.qual-badge{width:44px;height:44px;border-radius:15px;display:grid;place-items:center;background:linear-gradient(145deg,#174c69,#0b273c);border:1px solid var(--line);font-size:22px}.qual-head h2{font-size:19px;margin:0}.qual-head p{margin:3px 0 0;color:var(--muted);font-size:12px}.mission{width:100%;display:grid;grid-template-columns:44px 1fr auto;gap:11px;align-items:center;text-align:left;color:inherit;background:rgba(12,43,67,.74);border:1px solid rgba(255,255,255,.08);border-radius:17px;padding:11px}.mission.locked{opacity:.42}.mission.current{border-color:rgba(213,164,82,.62);box-shadow:0 0 0 2px rgba(213,164,82,.07)}.mission-num{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#071e31;color:var(--gold2);font-weight:900;border:1px solid var(--line)}.mission-title{font-weight:800}.mission-meta{display:block;color:#91abb8;font-size:11px;margin-top:3px}.rating{font-size:18px;white-space:nowrap}.lock{color:#6f8996}.learn-list{display:grid;gap:10px}.learn-card{padding:14px;border-radius:18px;background:rgba(11,40,61,.83);border:1px solid rgba(255,255,255,.08)}.learn-card summary{cursor:pointer;list-style:none;display:grid;grid-template-columns:40px 1fr auto;align-items:center;gap:10px}.learn-card summary::-webkit-details-marker{display:none}.concept-icon{width:38px;height:38px;border-radius:13px;background:#123c56;display:grid;place-items:center}.concept-state{font-size:10px;border-radius:999px;padding:5px 8px;background:rgba(255,255,255,.06);color:#abc0ca}.learn-body{padding:13px 2px 4px;color:#c5d6dc;line-height:1.5;font-size:13px}.mini-demo{margin:12px 0 5px;background:#061d2f;border:1px solid rgba(96,188,215,.18);border-radius:15px;padding:12px}.mission-shell{min-height:calc(100dvh - 72px);padding:0 14px 22px}.mission-top{display:flex;align-items:center;gap:10px;padding:12px 0}.mission-top .grow{flex:1}.mission-top small{color:var(--muted);display:block}.mission-panel{background:linear-gradient(145deg,#0e324c,#071e31);border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:var(--shadow)}.mission-panel h1{font-size:28px;margin:5px 0 10px}.mission-panel .lead{font-size:14px}.stage-dots{display:flex;gap:5px;margin:12px 0}.stage-dots span{height:5px;flex:1;border-radius:5px;background:#163d55}.stage-dots span.done{background:var(--gold2)}.briefing-visual{height:180px;border-radius:20px;margin:16px 0;background:linear-gradient(180deg,#194c67 0 48%,#0e6371 49% 54%,#082337 55%);position:relative;overflow:hidden}.briefing-visual:before{content:"";position:absolute;width:115px;height:24px;border-radius:70% 20% 50% 60%;background:#e8dfca;left:50%;top:86px;transform:translateX(-50%);box-shadow:0 -14px 0 -6px #e8dfca}.briefing-visual:after{content:"";position:absolute;width:20px;height:42px;background:#d4cbb8;left:52%;top:55px;border-radius:8px 8px 0 0;box-shadow:22px 12px 0 -5px #d4cbb8}.challenge-meta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:11px;margin-bottom:10px}.challenge-prompt{font-family:Georgia,serif;font-size:24px;line-height:1.18;margin:8px 0 18px}.answers{display:grid;gap:9px}.answer{min-height:54px;border-radius:16px;background:#123c56;border:1px solid rgba(255,255,255,.1);color:#eef7f8;padding:12px 14px;font-size:15px;font-weight:750;text-align:left}.answer.correct{background:#184d40;border-color:#50c497}.answer.wrong{background:#562b2b;border-color:#e17269}.answer:disabled{opacity:1}.feedback{margin-top:12px;padding:12px;border-radius:14px;background:#071d2e;border:1px solid rgba(255,255,255,.08);color:#cfe0e5;line-height:1.4;font-size:13px}.feedback strong{color:var(--gold2)}.visual{display:grid;place-items:center;margin:4px 0 18px;min-height:150px;background:radial-gradient(circle at 50% 50%,rgba(42,105,134,.28),transparent 58%);border-radius:18px}.ship-svg{width:min(75vw,280px);height:170px;overflow:visible}.ship-body{fill:#e9e0cd;stroke:#c4a25f;stroke-width:2}.ship-deck{fill:#183f59}.ship-port{fill:var(--red)}.ship-starboard{fill:var(--green)}.ship-label{fill:#f7f1df;font-size:11px;font-weight:800;text-anchor:middle}.dial{width:min(74vw,285px);aspect-ratio:1;border-radius:50%;position:relative;background:radial-gradient(circle,#0b314a 0 49%,#071b2a 50%);border:2px solid var(--gold);box-shadow:inset 0 0 30px #0008}.dial .needle{transition:transform .15s ease}.dial-value{text-align:center;font-family:ui-monospace,monospace;font-size:29px;color:var(--gold2);font-weight:900}.heading-slider{width:100%;accent-color:var(--gold2);margin:14px 0}.chart{width:100%;height:230px;border-radius:18px;background:linear-gradient(180deg,#d9cfaf,#eee3c4);position:relative;overflow:hidden;border:5px solid #102b3e;box-shadow:inset 0 0 0 1px #aa956c}.chart:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(0deg,transparent 0 44px,rgba(40,81,95,.18) 45px 46px),repeating-linear-gradient(90deg,transparent 0 54px,rgba(40,81,95,.18) 55px 56px)}.coast{position:absolute;background:#a7b78d;border:2px solid #778a70}.coast.a{width:150px;height:160px;left:-40px;bottom:-30px;border-radius:45% 56% 18% 20%;transform:rotate(-18deg)}.coast.b{width:120px;height:90px;right:-35px;top:-15px;border-radius:50% 20% 55% 40%;transform:rotate(20deg)}.route{position:absolute;height:3px;background:#b65648;transform-origin:left center;left:30%;top:63%;width:45%;transform:rotate(-27deg);box-shadow:0 0 0 1px rgba(255,255,255,.2)}.route:after{content:"➤";position:absolute;right:-8px;top:-12px;color:#913f35;font-size:20px}.chart-label{position:absolute;color:#2d4c54;font-weight:800;font-size:11px;z-index:2}.buoy-row{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}.buoy{width:88px;height:128px;border-radius:15px;background:#071d2e;border:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;justify-content:flex-end;align-items:center;padding:9px;position:relative}.buoy-shape{width:32px;height:65px;border-radius:14px 14px 7px 7px;background:var(--red);position:relative;box-shadow:inset -6px -8px rgba(0,0,0,.15)}.buoy-shape.green{background:var(--green)}.buoy-shape.yellow{background:#e6c84f}.buoy-shape.can{border-radius:3px}.buoy-shape.cone{clip-path:polygon(50% 0,100% 100%,0 100%);border-radius:0}.buoy-shape.northcard{background:linear-gradient(#1f262b 0 50%,#e4c443 50%)}.buoy-shape.southcard{background:linear-gradient(#e4c443 0 50%,#1f262b 50%)}.buoy-shape.eastcard{background:linear-gradient(#1f262b 0 33%,#e4c443 33% 66%,#1f262b 66%)}.buoy-shape.westcard{background:linear-gradient(#e4c443 0 33%,#1f262b 33% 66%,#e4c443 66%)}.buoy-shape.redblack{background:linear-gradient(#1f262b 0 33%,#e96058 34% 66%,#1f262b 67%)}.buoy-shape.safe{background:repeating-linear-gradient(90deg,#efeee5 0 8px,#e96058 8px 16px)}.topmark{position:absolute;top:-22px;color:#f5ead1;font-size:23px;line-height:1}.buoy-shape.cardinal .topmark,.buoy-shape.isolated .topmark{color:#101416;text-shadow:0 0 2px #f5ead1}.buoy-shape.special .topmark{color:#e6c84f}.reduce-motion *{animation:none!important;transition:none!important}.buoy small{margin-top:6px;color:#bacdd5}.night{width:100%;height:180px;border-radius:18px;position:relative;background:radial-gradient(circle at 55% 115%,#133552 0,#06111e 52%,#03080e 100%);overflow:hidden}.horizon{position:absolute;left:0;right:0;top:62%;height:1px;background:#2e5066}.navlight{position:absolute;width:18px;height:18px;border-radius:50%;box-shadow:0 0 18px 7px currentColor}.navlight.red{background:#ff655d;color:#ff655d}.navlight.green{background:#45e2a8;color:#45e2a8}.navlight.white{background:#fff7de;color:#fff7de}.flag-grid{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}.signal-flag{width:72px;height:58px;border:3px solid #f3ead7;box-shadow:0 6px 15px #0006;position:relative;overflow:hidden;flex:0 0 auto}.flag-label{text-align:center;margin-top:5px;font-weight:900;color:var(--gold2)}.lesson{background:linear-gradient(145deg,#f3e7ca,#d8c9a4);color:#173042;border-radius:22px;padding:18px;border:4px solid #0d2b42}.lesson h2{color:#173042;margin-top:0}.lesson p{color:#34505d;line-height:1.45}.lesson-callout{background:rgba(255,255,255,.52);border-left:5px solid #b78b3c;padding:12px;border-radius:12px;font-weight:750}.logbook-cover{background:linear-gradient(145deg,#173f54,#0b2638);border:1px solid var(--gold);border-radius:24px;padding:18px;box-shadow:var(--shadow)}.badge-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.badge{aspect-ratio:1;border-radius:18px;background:#0a2234;border:1px solid rgba(213,164,82,.25);display:grid;place-items:center;text-align:center;padding:6px}.badge.locked{filter:grayscale(1);opacity:.35}.badge .emoji{font-size:28px}.badge small{font-size:8px;color:#b6c8d0}.mastery-row{margin:12px 0}.mastery-row header{display:flex;justify-content:space-between;font-size:12px;margin-bottom:5px}.mastery-row .progress-track{height:6px}.empty{padding:28px 14px;text-align:center;color:var(--muted)}.modal-backdrop{position:fixed;inset:0;z-index:50;background:#02070cbf;display:grid;align-items:end;padding:12px}.modal{max-width:620px;width:100%;margin:0 auto;background:#0b2a41;border:1px solid var(--line);border-radius:26px 26px 18px 18px;padding:18px;box-shadow:var(--shadow)}.modal h2{font-family:Georgia,serif}.setting-row{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.07)}.switch{min-width:70px}.certificate{background:linear-gradient(145deg,#f4e9ce,#d4c49d);color:#173042;border:8px double #a87f38;border-radius:14px;padding:25px;text-align:center}.certificate h1{font-size:33px;color:#173042}.certificate .seal{font-size:52px}.toast{position:fixed;z-index:80;left:50%;bottom:calc(88px + var(--safe-bottom));transform:translate(-50%,20px);opacity:0;background:#f5ead1;color:#163043;border-radius:999px;padding:10px 15px;font-weight:800;font-size:12px;box-shadow:var(--shadow);transition:.22s;pointer-events:none}.toast.show{opacity:1;transform:translate(-50%,0)}.source-note{font-size:10px;color:#86a4b2;line-height:1.4;margin-top:16px}.disclaimer{margin-top:18px;padding:11px 13px;border-radius:14px;background:#061b2b;border:1px solid rgba(255,255,255,.08);color:#95aeb9;font-size:10px;line-height:1.4}.hidden{display:none!important}@media(min-width:720px){.page{padding:26px 22px}.hero{min-height:455px;padding:28px}.card-grid{grid-template-columns:repeat(4,1fr)}.mission-list{grid-template-columns:repeat(2,1fr)}.badge-grid{grid-template-columns:repeat(8,1fr)}.tabbar{left:50%;right:auto;width:520px;transform:translateX(-50%);border:1px solid var(--line);border-bottom:0;border-radius:20px 20px 0 0}.modal-backdrop{align-items:center}.modal{border-radius:26px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}