:root{
  --bg:#061129; --bg2:#081b4b; --card:#0f235a; --card2:#102b68; --text:#eef6ff; --muted:#b9c8e8; --line:rgba(255,255,255,.14); --brand:#39a7ff; --brand2:#81f0ff; --ok:#35e6a1; --warn:#ffd166; --bad:#ff6b8a; --shadow:0 24px 70px rgba(0,0,0,.35); --radius:28px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;background:radial-gradient(circle at top left,#12398b 0,#061129 38%,#030813 100%);color:var(--text);min-height:100vh} a{color:inherit;text-decoration:none} button{font:inherit;color:inherit} .hero{position:relative;overflow:hidden;min-height:92vh;padding:18px clamp(18px,4vw,64px) 44px}.orb{position:absolute;border-radius:999px;filter:blur(14px);opacity:.55;pointer-events:none}.orb-a{width:260px;height:260px;background:#1478ff;top:90px;right:12%}.orb-b{width:180px;height:180px;background:#5ef7ff;bottom:110px;left:5%}.topbar{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:1180px;margin:0 auto;padding:10px 0}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:850;letter-spacing:.2px}.brand-mark{width:38px;height:38px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;color:#00152a;box-shadow:0 12px 26px rgba(57,167,255,.28)}.pill{border:0;border-radius:999px;padding:13px 19px;font-weight:800;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:9px;transition:.2s transform,.2s opacity,.2s background;min-height:46px}.pill:active{transform:scale(.98)}.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#001731;box-shadow:0 14px 38px rgba(57,167,255,.32)}.secondary{background:rgba(255,255,255,.1);border:1px solid var(--line);backdrop-filter:blur(12px)}.outline{border:1px solid rgba(129,240,255,.45);background:rgba(8,27,75,.4)}.ghost{background:transparent;border:0;cursor:pointer}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center;max-width:1180px;margin:68px auto 0}.eyebrow{color:var(--brand2);font-weight:850;text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;margin:0 0 10px}.hero h1{font-size:clamp(2.35rem,7vw,5.9rem);line-height:.92;margin:0;letter-spacing:-.07em;max-width:760px}.lead{font-size:clamp(1rem,2vw,1.23rem);line-height:1.55;color:var(--muted);max-width:680px;margin:24px 0}.identity-card{display:flex;align-items:center;justify-content:space-between;gap:18px;background:rgba(255,255,255,.09);border:1px solid var(--line);border-radius:24px;padding:18px;max-width:560px;backdrop-filter:blur(14px)}.identity-card div{display:grid;gap:4px}.identity-card span{color:var(--muted)}.instagram{font-weight:850;color:var(--brand2);white-space:nowrap}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.brain-card{position:relative;background:linear-gradient(180deg,rgba(255,255,255,.13),rgba(255,255,255,.06));border:1px solid var(--line);border-radius:36px;padding:22px;min-height:450px;box-shadow:var(--shadow);overflow:hidden}.brain-glow{position:absolute;inset:16%;border-radius:50%;background:radial-gradient(circle,#1a9cff66,transparent 64%);filter:blur(22px)}.brain-svg{position:relative;width:100%;height:320px}.brain-lobe{fill:rgba(57,167,255,.18);stroke:#81f0ff;stroke-width:4;stroke-linecap:round;stroke-linejoin:round}.lobe2{fill:rgba(129,240,255,.12)}.lobe3{fill:rgba(82,130,255,.18)}.cereb{fill:rgba(53,230,161,.14)}.stem{fill:none;stroke:#81f0ff;stroke-width:12}.node{fill:#fff;filter:drop-shadow(0 0 12px #81f0ff)}.brain-tags{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.brain-tags button{border:1px solid var(--line);background:rgba(255,255,255,.08);border-radius:18px;padding:14px;font-weight:800;cursor:pointer}.quick-nav{position:sticky;top:0;z-index:5;display:flex;gap:10px;overflow:auto;padding:14px clamp(18px,4vw,64px);background:rgba(3,8,19,.74);backdrop-filter:blur(16px);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.quick-nav a{flex:0 0 auto;display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.08);border:1px solid var(--line);border-radius:999px;padding:10px 14px;font-weight:750;color:var(--muted)}.section{max-width:1180px;margin:0 auto;padding:68px clamp(18px,4vw,28px)}.contrast{max-width:none;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.contrast>*{max-width:1180px;margin-left:auto;margin-right:auto}.section-head{max-width:760px;margin-bottom:26px}.section h2{font-size:clamp(2rem,5vw,3.5rem);line-height:1;margin:0 0 14px;letter-spacing:-.045em}.section p{color:var(--muted);line-height:1.55}.progress-wrap{background:rgba(255,255,255,.08);border:1px solid var(--line);border-radius:20px;padding:16px;margin-bottom:22px}.progress-info{display:flex;justify-content:space-between;color:var(--muted);font-weight:800;margin-bottom:10px}.progress-bar,.quiz-progress{height:12px;background:rgba(255,255,255,.1);border-radius:999px;overflow:hidden}.progress-bar span,.quiz-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--ok));border-radius:999px;transition:width .25s}.study-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.study-card{background:linear-gradient(180deg,rgba(255,255,255,.1),rgba(255,255,255,.055));border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:0 14px 42px rgba(0,0,0,.18)}.study-card header{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.study-card h3{margin:0;font-size:1.38rem}.tag{display:inline-flex;background:rgba(129,240,255,.14);color:var(--brand2);border:1px solid rgba(129,240,255,.28);border-radius:999px;padding:6px 10px;font-size:.76rem;font-weight:850}.study-card summary{cursor:pointer;font-weight:850;margin-top:18px;list-style:none}.study-card summary::-webkit-details-marker{display:none}.study-card details[open] summary{color:var(--brand2)}.study-card ul{padding-left:20px;color:var(--muted);line-height:1.55}.review-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:18px;border-top:1px solid var(--line);padding-top:16px}.check{border:1px solid var(--line);background:rgba(255,255,255,.08);border-radius:999px;padding:10px 13px;cursor:pointer;font-weight:800}.check.done{background:rgba(53,230,161,.18);border-color:rgba(53,230,161,.5);color:#a9ffd9}.flash-toolbar{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:18px}.flash-card{display:block;width:min(760px,100%);min-height:230px;margin:0 auto;border:1px solid var(--line);border-radius:32px;background:linear-gradient(135deg,rgba(57,167,255,.16),rgba(255,255,255,.06));padding:30px;text-align:left;box-shadow:var(--shadow);cursor:pointer}.flash-card strong{display:block;font-size:1.35rem;margin-bottom:12px}.flash-card span{color:var(--muted);line-height:1.6}.quiz-shell{background:rgba(255,255,255,.08);border:1px solid var(--line);border-radius:32px;padding:20px;box-shadow:var(--shadow)}.quiz-status{display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-weight:850;margin-bottom:12px}.question-card{padding:18px 0}.question-card h3{font-size:clamp(1.25rem,3vw,2rem);margin:0 0 16px}.options{display:grid;gap:12px}.option{display:flex;align-items:flex-start;gap:12px;width:100%;border:1px solid var(--line);background:rgba(255,255,255,.07);border-radius:20px;padding:16px;text-align:left;cursor:pointer;line-height:1.45}.option .letter{flex:0 0 30px;width:30px;height:30px;border-radius:999px;background:rgba(129,240,255,.14);display:grid;place-items:center;font-weight:900;color:var(--brand2)}.option.selected{border-color:#81f0ff;background:rgba(129,240,255,.14)}.option.correct{border-color:rgba(53,230,161,.7);background:rgba(53,230,161,.16)}.option.wrong{border-color:rgba(255,107,138,.7);background:rgba(255,107,138,.14)}.explain{margin-top:14px;color:var(--muted);border-left:4px solid var(--brand2);padding:10px 14px;background:rgba(255,255,255,.05);border-radius:0 14px 14px 0}.quiz-actions{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.results{margin-top:22px;background:linear-gradient(180deg,rgba(255,255,255,.1),rgba(255,255,255,.06));border:1px solid var(--line);border-radius:32px;padding:24px}.score-big{font-size:clamp(3rem,10vw,6rem);font-weight:950;letter-spacing:-.06em;line-height:1}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}.result-card{background:rgba(255,255,255,.07);border:1px solid var(--line);border-radius:22px;padding:16px}.result-card h4{margin:0 0 10px}.mini-bar{height:10px;background:rgba(255,255,255,.11);border-radius:999px;overflow:hidden}.mini-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--ok));border-radius:999px}.review-list{display:grid;gap:10px;margin-top:16px}.review-item{border:1px solid var(--line);border-radius:18px;padding:12px;background:rgba(255,255,255,.055)}.footer{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding:30px clamp(18px,4vw,64px);border-top:1px solid var(--line);color:var(--muted);background:#030813}.footer div{display:grid;gap:4px}.footer a{color:var(--brand2);font-weight:850}.install-tip{position:fixed;left:14px;right:14px;bottom:14px;z-index:20;background:rgba(6,17,41,.96);border:1px solid var(--line);border-radius:22px;padding:16px 50px 16px 16px;box-shadow:var(--shadow);display:grid;gap:5px}.close-tip{position:absolute;right:12px;top:10px;font-size:1.5rem;color:var(--muted)}
@media (max-width:860px){.hero{min-height:auto}.hero-grid{grid-template-columns:1fr;margin-top:38px}.brain-card{min-height:auto}.brain-svg{height:250px}.study-grid,.result-grid{grid-template-columns:1fr}.identity-card{align-items:flex-start;flex-direction:column}.section{padding-top:52px;padding-bottom:52px}.quiz-status{flex-direction:column;gap:6px}.pill{width:auto}.hero h1{font-size:3.1rem}.quick-nav{top:0}.topbar{align-items:flex-start}.brand{font-size:.96rem}}
@media (display-mode: standalone){#installBtn,.install-tip{display:none!important}}