:root{color-scheme:dark;--bg:#0b1010;--bg2:#101615;--panel:#151d1a;--panel2:#1b2622;--line:#2a3932;--text:#f2f4ef;--muted:#9ca9a1;--green:#b2dfb8;--green-2:#3a6846;--gold:#e8bd78;--red:#e99588;--purple:#c3a9e8;--radius:18px;--shadow:0 24px 80px #0008}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:14px 'DM Sans',sans-serif}button,input,select{font:inherit}button{cursor:pointer;color:inherit}a{color:var(--green)}.boot{min-height:100vh;display:grid;place-content:center;gap:12px;text-align:center;color:var(--muted)}.boot b{font-size:32px;color:var(--green)}.app{min-height:100vh}.topbar{height:70px;position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:32px;padding:0 clamp(18px,5vw,72px);background:#0b1010ee;border-bottom:1px solid #fff0;backdrop-filter:blur(18px)}.logo{font:800 23px Manrope,sans-serif;letter-spacing:-1px;white-space:nowrap}.logo span{color:var(--green)}.nav{display:flex;align-items:center;gap:6px;flex:1}.nav button,.icon-btn{border:0;background:transparent;color:#aeb9b1;padding:10px 11px;border-radius:9px;font-size:12px;white-space:nowrap}.nav button:hover,.nav button.active{background:#ffffff0b;color:#fff}.rightbar{display:flex;align-items:center;gap:10px}.status-pill,.tag{border:1px solid var(--line);color:var(--muted);font-size:10px;letter-spacing:.07em;padding:7px 10px;border-radius:99px;white-space:nowrap}.avatar{border-radius:50%;width:34px;height:34px;display:grid;place-items:center;background:var(--green);color:#122016;font-weight:800}.container{max-width:1440px;margin:auto;padding:0 clamp(18px,5vw,72px) 70px}.view{display:none;animation:in .3s ease}.view.active{display:block}@keyframes in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.hero{position:relative;min-height:480px;display:flex;align-items:flex-end;padding:60px 0 44px;isolation:isolate}.hero-art{position:absolute;z-index:-1;inset:0 -7vw;background:radial-gradient(ellipse at 70% 43%,#47784d66,transparent 34%),radial-gradient(ellipse at 82% 15%,#b0bd7b22,transparent 25%),linear-gradient(90deg,#0b1010 5%,#0b1010c9 40%,#0b101033 76%),linear-gradient(0deg,#0b1010 0%,transparent 46%),linear-gradient(130deg,#142019,#20362b 60%,#142018)}.hero-art:after{content:'';position:absolute;right:14%;top:14%;width:260px;height:260px;border-radius:50%;border:1px solid #d7edcd24;box-shadow:0 0 100px #d4f3bc12,inset 0 0 60px #d4f3bc13}.hero-copy{max-width:650px}.eyebrow{font-size:10px;letter-spacing:.19em;text-transform:uppercase;font-weight:700;color:var(--green)}h1,h2,h3,p{margin-top:0}.hero h1{font:800 clamp(48px,7vw,86px)/.99 Manrope,sans-serif;letter-spacing:-.065em;margin:16px 0}.hero p{max-width:550px;color:#d0d8d0;line-height:1.7;font-size:15px}.cta-row{display:flex;gap:10px;margin-top:22px}.btn{border:1px solid transparent;border-radius:10px;padding:11px 15px;background:var(--green);color:#112016;font-weight:800;font-size:12px;display:inline-flex;align-items:center;gap:8px}.btn:hover{filter:brightness(1.08);transform:translateY(-1px)}.btn.secondary{background:#ffffff12;border-color:#ffffff24;color:#f4f6f1}.btn.ghost{background:transparent;color:var(--muted);border-color:var(--line)}.hero-meta{display:flex;gap:16px;margin-top:25px;color:#c5cec6;font-size:11px}.hero-meta span:before{content:'✦';color:var(--green);margin-right:7px}.section{margin:32px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}.section-head h2{font:700 19px Manrope;margin:0;letter-spacing:-.03em}.section-head p{color:var(--muted);font-size:12px;margin:4px 0 0}.text-btn{border:0;background:none;color:var(--green);font-size:11px}.rail{display:grid;grid-template-columns:repeat(4,minmax(190px,1fr));gap:13px}.exam-card,.feature-card,.panel{border:1px solid var(--line);background:linear-gradient(145deg,#18211d,#121816);border-radius:var(--radius);overflow:hidden}.exam-card{min-height:170px;padding:17px;position:relative;cursor:pointer;transition:.2s}.exam-card:hover,.feature-card:hover{transform:translateY(-3px);border-color:#6ca27799}.exam-card:after{content:'';position:absolute;right:-40px;bottom:-90px;width:180px;height:180px;border-radius:50%;background:var(--glow,#a6d9ae);opacity:.1;filter:blur(35px)}.exam-card .exam-mark{display:flex;justify-content:space-between;color:var(--muted);font-size:11px}.exam-card h3{font:700 17px Manrope;margin:27px 0 5px}.exam-card p{color:var(--muted);font-size:11px;margin:0}.progress-line{height:4px;background:#27322d;border-radius:10px;margin-top:15px;overflow:hidden}.progress-line i{display:block;height:100%;background:var(--green);border-radius:inherit}.feature-rail{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.feature-card{min-height:126px;padding:17px;cursor:pointer}.feature-card .feat-icon{font-size:20px;color:var(--green)}.feature-card h3{font:700 14px Manrope;margin:15px 0 5px}.feature-card p{color:var(--muted);font-size:11px;line-height:1.5;margin:0}.notice{border:1px solid #5d4d2f;background:#272218;color:#dfcfaa;padding:13px 15px;border-radius:12px;font-size:12px;line-height:1.65}.notice strong{color:#f3d89f}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:30px 0 18px}.toolbar h1{font:700 28px Manrope;letter-spacing:-.04em;margin:0}.toolbar p{color:var(--muted);font-size:12px;margin:5px 0 0}.select,.search{background:#151d1a;border:1px solid var(--line);color:var(--text);border-radius:10px;padding:10px 12px}.search{min-width:210px}.tabs{display:flex;gap:7px;flex-wrap:wrap;margin:14px 0}.tab{border:1px solid var(--line);background:#141b18;color:var(--muted);padding:8px 12px;border-radius:99px;font-size:11px}.tab.active{background:#284631;color:var(--green);border-color:#497553}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.panel{padding:18px}.panel h3{font:700 15px Manrope;margin:0 0 8px}.panel p{color:var(--muted);font-size:12px;line-height:1.65}.panel .small{font-size:10px;color:var(--muted)}.source-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}.source-card{padding:13px;border-radius:12px;border:1px solid var(--line);background:#111715}.source-card b{font-size:11px}.source-card a{display:inline-block;font-size:10px;margin-top:7px}.syllabus details{border-top:1px solid var(--line);padding:12px 0}.syllabus summary{font-weight:600;cursor:pointer;list-style:none;font-size:12px}.syllabus summary:after{content:'＋';float:right;color:var(--green)}.syllabus details[open] summary:after{content:'−'}.syllabus ul{padding-left:19px;color:#bdc7bf;font-size:11px;line-height:1.9}.checktopic{display:flex;gap:8px;align-items:flex-start}.checktopic input{accent-color:#8fc99a;margin-top:3px}.topic-meta{color:#728078;font-size:9px;margin-left:auto}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.lesson{padding:17px;border-radius:15px;border:1px solid var(--line);background:linear-gradient(150deg,#18221c,#121816)}.lesson-top{display:flex;justify-content:space-between}.lesson h3{font:700 15px Manrope;margin:14px 0 8px}.lesson p{font-size:11px;line-height:1.65;color:#bdc7bf}.mnemonic{border:1px dashed #46694d;background:#17251b;border-radius:10px;padding:11px;font-size:11px;color:#d5e5d5;line-height:1.6}.diagram{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:5px;margin:12px 0}.diagram span{padding:6px 8px;border-radius:8px;background:#24342a;color:#d9e8d9;font-size:9px}.lesson a{font-size:10px}.quiz-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:13px}.quiz-stage{min-height:360px}.q-options{display:grid;gap:8px}.option{width:100%;text-align:left;padding:12px;background:#1a2420;border:1px solid #344139;border-radius:10px;color:var(--text);font-size:12px}.option:hover{border-color:#78aa80}.option.correct{background:#1b3824;border-color:#70b580}.option.incorrect{background:#392320;border-color:#ce796c}.explanation{background:#1b2820;border-radius:11px;padding:13px;margin-top:12px;color:#cbd8ce;font-size:11px;line-height:1.7}.quiz-actions{display:flex;justify-content:space-between;gap:8px;margin-top:14px}.metric{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin:12px 0}.list{display:grid;gap:9px}.list-item{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:14px;border:1px solid var(--line);border-radius:12px;background:#141b18}.list-item b{font-size:12px}.list-item p{color:var(--muted);font-size:10px;margin:5px 0 0}.list-item a{font-size:10px;white-space:nowrap}.source-grid.current{grid-template-columns:repeat(3,1fr)}.source-card p{line-height:1.5;color:var(--muted);font-size:10px}.foot{border-top:1px solid var(--line);padding:20px 0;color:#78867d;font-size:10px;display:flex;justify-content:space-between;margin-top:35px}.empty{text-align:center;padding:45px 18px}.empty h3{font:700 17px Manrope}.empty p{color:var(--muted);line-height:1.7;font-size:12px;max-width:500px;margin:0 auto 15px}.kbd{font-size:9px;border:1px solid var(--line);border-radius:5px;padding:3px 5px;color:var(--muted)}
@media(max-width:1020px){.topbar{gap:14px}.nav{overflow-x:auto}.status-pill{display:none}.rail{grid-template-columns:repeat(2,1fr)}.feature-rail{grid-template-columns:repeat(2,1fr)}.lesson-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:700px){.topbar{height:auto;min-height:62px;flex-wrap:wrap;padding:11px 16px;gap:8px}.nav{order:3;flex-basis:100%;overflow-x:auto}.nav button{padding:8px;font-size:10px}.container{padding:0 16px 45px}.hero{min-height:420px;padding-bottom:26px}.hero-art:after{right:4%;width:170px;height:170px}.hero h1{font-size:54px;letter-spacing:-.06em}.hero p{font-size:13px}.hero-meta{flex-wrap:wrap;gap:8px}.rail{gap:8px}.exam-card{min-height:145px;padding:13px}.exam-card h3{font-size:14px;margin-top:20px}.feature-rail,.lesson-grid,.grid2,.source-grid,.source-grid.current{grid-template-columns:1fr}.toolbar{align-items:flex-start;flex-direction:column}.toolbar h1{font-size:24px}.quiz-layout{grid-template-columns:1fr}.source-grid{gap:8px}.foot{display:block;line-height:1.8}.list-item{align-items:flex-start;flex-direction:column}.list-item a{white-space:normal}.search{width:100%}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}
