:root {
  --navy:#0a2146;
  --navy2:#123966;
  --teal:#0891b2;
  --teal2:#0e7490;
  --blue:#2563eb;
  --gold:#c9972b;
  --green:#15803d;
  --amber:#b45309;
  --red:#b91c1c;
  --purple:#6d28d9;
  --ink:#111827;
  --muted:#52606d;
  --bg:#f5f8fc;
  --panel:#fff;
  --border:rgba(10,33,70,.14);
  --shadow:0 16px 44px rgba(10,33,70,.10);
  --radius:20px;
  --radius-sm:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:radial-gradient(900px 460px at 0 0,rgba(8,145,178,.10),transparent 56%),radial-gradient(900px 460px at 100% 0,rgba(37,99,235,.08),transparent 55%),var(--bg);font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.55}
a{color:var(--blue)}
button,input,select,textarea{font:inherit}
button,.button{-webkit-tap-highlight-color:transparent}
.container{width:min(1160px,calc(100% - 36px));margin:0 auto}
.skip-link{position:fixed;left:12px;top:-60px;z-index:1000;background:#fff;color:var(--navy);padding:10px 14px;border:2px solid var(--navy);border-radius:10px}.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(250,252,255,.95);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:86px}
.brand-logo img{display:block;width:min(330px,45vw);height:auto;max-height:64px}
.nav{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.nav a{color:var(--navy);font-weight:750;text-decoration:none;padding:9px 12px;border:1px solid transparent;border-radius:999px}.nav a:hover,.nav a[aria-current="page"]{background:rgba(8,145,178,.08);border-color:rgba(8,145,178,.24)}
.hero{padding:54px 0 36px;border-bottom:1px solid var(--border);background:radial-gradient(700px 360px at 10% 10%,rgba(8,145,178,.20),transparent 64%),radial-gradient(780px 400px at 90% 0,rgba(37,99,235,.16),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(280px,.75fr);gap:28px;align-items:center}
.eyebrow,.kicker{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border:1px solid rgba(8,145,178,.28);border-radius:999px;color:var(--teal2);background:rgba(255,255,255,.78);font-size:.78rem;font-weight:850;letter-spacing:.04em;text-transform:uppercase}
h1{margin:14px 0 10px;font-size:clamp(2.25rem,5vw,4.35rem);line-height:1.02;letter-spacing:-.045em;color:var(--navy)}
h2{color:var(--navy);line-height:1.16}h3{color:var(--navy);line-height:1.25}
.hero-lead{font-size:clamp(1.05rem,2vw,1.28rem);color:var(--muted);max-width:72ch;margin:0}
.hero-actions,.inline-actions,.output-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.button{border:1px solid var(--border);border-radius:999px;padding:11px 16px;background:#fff;color:var(--navy);font-weight:850;text-decoration:none;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;transition:transform .15s,box-shadow .15s}.button:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(10,33,70,.12)}.button-primary{color:#fff;background:linear-gradient(135deg,var(--navy),var(--teal));border-color:transparent}.button-gold{color:#fff;background:linear-gradient(135deg,#8d5f08,var(--gold));border-color:transparent}.button-danger{color:#fff;background:var(--red);border-color:transparent}.button-small{padding:8px 12px;min-height:38px;font-size:.86rem}
.hero-memory{background:rgba(255,255,255,.9);border:1px solid var(--border);border-radius:24px;padding:22px;box-shadow:var(--shadow)}.memory-number{font-size:3.25rem;font-weight:950;line-height:1;color:var(--teal2);letter-spacing:-.05em}.memory-title{font-size:1.14rem;font-weight:900;color:var(--navy);margin-top:8px}.memory-copy{color:var(--muted);margin-top:8px}.trust-row,.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}.trust-chip,.tag,.status-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border:1px solid var(--border);border-radius:999px;background:rgba(255,255,255,.80);color:var(--navy2);font-size:.78rem;font-weight:800}.status-ready{background:#e8fff0;color:#126633}.status-check{background:#fff5dd;color:#865508}
.section{padding:38px 0}.section-soft{background:rgba(255,255,255,.58);border-block:1px solid var(--border)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}.section-heading h2{margin:0 0 6px;font-size:clamp(1.65rem,3vw,2.35rem)}.section-heading p{margin:0;color:var(--muted);max-width:75ch}
.hub-grid,.lane-grid,.education-grid,.source-grid,.output-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.hub-card,.lane-card,.education-card,.output-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-decoration:none;color:inherit;box-shadow:0 1px 0 rgba(10,33,70,.03)}.hub-card:hover,.lane-card:hover{border-color:rgba(8,145,178,.36);box-shadow:var(--shadow)}.module-icon,.lane-icon{font-size:2.3rem}.hub-card h2,.lane-card h2{margin:8px 0 4px}.hub-card h3{margin:0 0 8px;color:var(--teal2)}.hub-card p,.lane-card p,.education-card p{color:var(--muted)}
.notice{display:flex;gap:11px;align-items:flex-start;padding:14px 15px;border:1px solid rgba(201,151,43,.25);border-radius:15px;background:linear-gradient(135deg,rgba(201,151,43,.14),rgba(8,145,178,.08))}.notice strong{color:var(--navy)}
.step-list{display:grid;gap:16px}.step-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:0 1px 0 rgba(10,33,70,.03)}.step-head{display:grid;grid-template-columns:48px minmax(0,1fr);gap:14px;align-items:start;padding:18px 20px 10px}.step-number{width:44px;height:44px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,var(--navy),var(--teal));color:#fff;font-weight:950;font-size:1.1rem}.step-head h3{margin:2px 0 3px;font-size:1.2rem}.step-head p{margin:0;color:var(--muted)}.step-body{padding:8px 20px 20px}
.option-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.option-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.option{display:flex;align-items:flex-start;gap:10px;padding:12px 13px;border:1px solid var(--border);border-radius:14px;background:#fbfdff;cursor:pointer;min-height:52px}.option:hover{border-color:rgba(8,145,178,.42);background:rgba(8,145,178,.035)}.option input{margin-top:4px;accent-color:var(--teal2)}.option strong{color:var(--navy)}.option small{display:block;color:var(--muted);margin-top:2px}.option:has(input:checked){border-color:var(--teal);background:rgba(8,145,178,.08);box-shadow:inset 0 0 0 1px rgba(8,145,178,.14)}
.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.field-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.field label,.field-label{display:block;font-weight:850;color:var(--navy);margin-bottom:6px}.field input,.field select,.field textarea{width:100%;border:1px solid var(--border);border-radius:12px;padding:11px 12px;background:#fff;color:var(--ink);min-height:44px}.field textarea{min-height:88px;resize:vertical}.help{color:var(--muted);font-size:.87rem;margin:6px 0 0}.field input:focus,.field select:focus,.field textarea:focus,button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid rgba(37,99,235,.32);outline-offset:2px}
.hidden{display:none!important}.subpanel{margin-top:14px;border:1px dashed rgba(10,33,70,.22);border-radius:14px;padding:14px;background:rgba(245,248,252,.72)}.callout{border:1px solid var(--border);border-left:5px solid var(--teal);border-radius:14px;background:#fff;padding:14px 15px;color:var(--muted)}.callout strong{color:var(--navy)}.callout-warning{border-left-color:var(--amber);background:#fffaf1}.callout-danger{border-left-color:var(--red);background:#fff7f7}.callout-success{border-left-color:var(--green);background:#f4fff7}
.builder-footer{position:sticky;bottom:12px;z-index:5;margin-top:18px;background:rgba(10,33,70,.97);color:#fff;border-radius:18px;padding:13px 15px;display:flex;justify-content:space-between;align-items:center;gap:12px;box-shadow:0 18px 42px rgba(10,33,70,.24)}.builder-footer strong{display:block}.builder-footer span{color:rgba(255,255,255,.78);font-size:.88rem}
.output-card.wide{grid-column:1/-1}.output-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}.output-head h3{margin:0}.output-text{white-space:pre-wrap;background:#f7fafc;border:1px solid var(--border);border-radius:13px;padding:14px;min-height:130px;color:#1f2937;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88rem;overflow-wrap:anywhere}
details{border:1px solid var(--border);border-radius:15px;background:#fff}details+details{margin-top:10px}summary{cursor:pointer;padding:14px 16px;font-weight:850;color:var(--navy)}details>div{padding:0 16px 16px;color:var(--muted)}
.flip-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.flip-card{min-height:172px;padding:0;border:0;background:transparent;perspective:1000px;cursor:pointer;text-align:left}.flip-inner{position:relative;width:100%;min-height:172px;transition:transform .5s;transform-style:preserve-3d}.flip-card[aria-pressed="true"] .flip-inner{transform:rotateY(180deg)}.flip-face{position:absolute;inset:0;backface-visibility:hidden;border:1px solid var(--border);border-radius:18px;padding:17px;background:#fff;box-shadow:0 1px 0 rgba(10,33,70,.03)}.flip-back{transform:rotateY(180deg);background:linear-gradient(145deg,var(--navy),var(--navy2));color:#fff}.flip-back h3{color:#fff}.flip-hint{font-size:.82rem;color:var(--muted)}
.quiz-shell{background:#fff;border:1px solid var(--border);border-radius:22px;padding:20px}.quiz-top{display:flex;justify-content:space-between;gap:14px;align-items:center}.progress-track{height:9px;background:#e7edf5;border-radius:999px;overflow:hidden;margin:14px 0 20px}.progress-bar{height:100%;width:0;background:linear-gradient(90deg,var(--teal),var(--blue));transition:width .25s}.quiz-options{display:grid;gap:10px}.quiz-option{width:100%;text-align:left;padding:13px 14px;border:1px solid var(--border);background:#fff;border-radius:14px;cursor:pointer;color:var(--ink)}.quiz-option:hover{border-color:var(--teal);background:rgba(8,145,178,.04)}.quiz-option.correct{border-color:var(--green);background:#f0fff4}.quiz-option.incorrect{border-color:var(--red);background:#fff5f5}.quiz-feedback{margin-top:15px;border-radius:14px;padding:14px;border:1px solid var(--border)}.quiz-feedback.correct{border-left:5px solid var(--green);background:#f3fff7}.quiz-feedback.incorrect{border-left:5px solid var(--red);background:#fff7f7}.quiz-result{text-align:center;padding:16px}.quiz-score{font-size:3rem;font-weight:950;color:var(--navy)}
.source-list{margin:0;padding-left:20px}.source-list li+li{margin-top:10px}.code-box{background:#0b172a;color:#e5eefb;border-radius:14px;padding:14px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.86rem;white-space:pre-wrap}
.checklist-mini{display:grid;gap:8px;padding:0;list-style:none}.checklist-mini li{display:flex;gap:9px}.checklist-mini li::before{content:"✓";color:var(--green);font-weight:950}
.site-footer{border-top:1px solid var(--border);padding:24px 0;background:rgba(255,255,255,.70)}.footer-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:.9rem}.foot-tag{font-style:italic}.foot-tag b{color:var(--teal);font-style:normal}
.toast{position:fixed;right:18px;bottom:18px;z-index:100;background:var(--navy);color:#fff;border-radius:999px;padding:11px 16px;box-shadow:var(--shadow);opacity:0;transform:translateY(12px);pointer-events:none;transition:.2s}.toast.show{opacity:1;transform:translateY(0)}
@media(max-width:900px){.hero-grid,.output-grid,.source-grid,.education-grid,.hub-grid{grid-template-columns:1fr}.flip-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.option-grid.three,.field-grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}.output-card.wide{grid-column:auto}}
@media(max-width:680px){.container{width:min(100% - 24px,1160px)}.header-inner{align-items:flex-start;flex-direction:column;padding:12px 0;gap:8px}.brand-logo img{width:72px;max-height:72px}.nav{width:100%;overflow-x:auto;flex-wrap:nowrap;justify-content:flex-start;padding-bottom:3px}.nav a{white-space:nowrap}.hero{padding-top:34px}.hero-grid,.lane-grid,.option-grid,.option-grid.three,.field-grid,.field-grid.three,.flip-grid{grid-template-columns:1fr}.hero-actions .button{width:100%}.step-head{grid-template-columns:40px minmax(0,1fr);padding-inline:14px}.step-number{width:38px;height:38px;border-radius:12px}.step-body{padding-inline:14px}.builder-footer{position:static;flex-direction:column;align-items:stretch}.builder-footer .button{width:100%}.section-heading{align-items:flex-start;flex-direction:column}.output-head{align-items:flex-start;flex-direction:column}.quiz-top{align-items:flex-start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}
@media print{.site-header,.site-footer,.hero-actions,.builder-footer,.no-print,.quiz-shell,.flip-grid,button{display:none!important}body{background:#fff;color:#000}.hero,.section,.section-soft{padding:12px 0;background:#fff;border:0}.step-card,.education-card,.output-card,details{box-shadow:none;border-color:#aaa;break-inside:avoid}details>div{display:block!important}a{color:#000;text-decoration:none}}