:root{
 --navy:#0a2038;--navy2:#123c5f;--teal:#1b7d74;--teal2:#2c958a;
 --gold:#d6a52f;--ink:#172536;--muted:#667688;--line:#dfe8ee;
 --bg:#f3f7f9;--white:#fff;--good:#208b58;--goodbg:#eaf7f0;
 --bad:#c44b4b;--badbg:#fff1ef;--warn:#fff8e7;
 --shadow:0 18px 48px rgba(10,32,56,.09)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:linear-gradient(180deg,#fbfcfd,var(--bg));font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}
a{color:inherit}
header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{max-width:1120px;margin:auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none}
.mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(145deg,var(--navy),var(--teal));display:grid;place-items:center;color:#fff;font-weight:900}
.brand strong{display:block;color:var(--navy);font-size:16px}.brand small{display:block;color:var(--muted);font-size:11px;margin-top:1px}
nav{display:flex;gap:20px;align-items:center;font-size:14px;color:#526679}
nav a{text-decoration:none}nav a:hover{color:var(--teal)}
.nav-cta{padding:9px 12px;border:1px solid #cddbe3;border-radius:10px;background:#fff;font-weight:700;color:var(--navy)}
.container{max-width:1120px;margin:auto;padding:42px 22px 70px}
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center;padding:44px 0 32px}
.kicker{color:var(--teal);font-weight:800;text-transform:uppercase;letter-spacing:.12em;font-size:12px}
h1,h2,h3{color:var(--navy);letter-spacing:-.03em}
h1{font-size:52px;line-height:1.04;margin:12px 0 18px}
.lead{font-size:18px;line-height:1.7;color:var(--muted);max-width:690px}
.actions{display:flex;gap:11px;flex-wrap:wrap;margin-top:24px}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:11px;padding:13px 17px;font-weight:800;cursor:pointer;text-decoration:none}
.btn.primary{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;box-shadow:0 8px 20px rgba(10,32,56,.16)}
.btn.secondary{background:#edf7f5;color:var(--teal);border:1px solid #cde4df}
.btn.ghost{background:#fff;color:var(--navy);border:1px solid var(--line)}
.hero-card,.card{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
.hero-card{padding:26px}.mini-test{padding:18px;border-radius:16px;background:#f8fbfc;border:1px solid #e6edf1}
.mini-test b{display:block;margin-bottom:10px}.mini-row{height:12px;background:#e7eef2;border-radius:999px;margin:8px 0}.mini-row:nth-child(2){width:91%}.mini-row:nth-child(3){width:77%}.mini-row:nth-child(4){width:84%}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:18px}
.stat{padding:13px;border:1px solid var(--line);border-radius:13px}.stat b{font-size:20px;color:var(--navy)}.stat span{display:block;color:var(--muted);font-size:11px;margin-top:2px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}.feature{padding:22px}.feature h3{margin:8px 0}.feature p{color:var(--muted);line-height:1.6;font-size:14px}
.section-title{margin-top:42px}.section-title h2{font-size:30px;margin:8px 0}.section-title p{color:var(--muted)}
.practice-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:22px;align-items:start}
.quiz-card{overflow:hidden}.quiz-top{padding:20px 26px;border-bottom:1px solid #edf1f3}.meta{display:flex;justify-content:space-between;gap:14px;align-items:center;color:var(--muted);font-size:13px}
.part{background:#eef7f5;color:var(--teal);border-radius:9px;padding:8px 10px;font-weight:750;font-size:12px}
.track{height:8px;background:#eaf0f3;border-radius:999px;margin-top:16px;overflow:hidden}.bar{height:100%;background:linear-gradient(90deg,var(--teal),var(--teal2));transition:width .25s}
.quiz-body{padding:29px 26px}.topic{font-size:11px;text-transform:uppercase;letter-spacing:.11em;color:var(--gold);font-weight:850}
.question{font-size:28px;line-height:1.3;margin:10px 0 23px}
.choices{display:grid;gap:10px}.choice{width:100%;display:flex;align-items:center;gap:12px;padding:15px;border-radius:13px;background:#fff;border:1px solid #dce5eb;text-align:left;cursor:pointer;font-size:15px}
.choice:hover:not(:disabled){border-color:#8ab7b3;background:#fbfdfd}.choice:disabled{cursor:default;color:inherit}
.letter{width:30px;height:30px;border:1px solid #d6e0e6;background:#f5f8fa;border-radius:9px;display:grid;place-items:center;font-weight:850;color:var(--navy)}
.choice.correct{background:var(--goodbg);border-color:#9bd0b3}.choice.correct .letter{background:var(--good);color:#fff;border-color:var(--good)}
.choice.wrong{background:var(--badbg);border-color:#e4a49f}.choice.wrong .letter{background:var(--bad);color:#fff;border-color:var(--bad)}
.feedback{display:none;margin-top:18px;padding:16px;border-radius:14px;line-height:1.55}.feedback.good{display:block;background:var(--goodbg);border:1px solid #b8dfc9}.feedback.bad{display:block;background:var(--warn);border:1px solid #eed99b}.feedback strong{display:block;color:var(--navy);margin-bottom:3px}
.quiz-actions{display:none;gap:10px;flex-wrap:wrap;margin-top:17px}
.side{display:grid;gap:15px}.side-card{padding:18px}.side-card h3{font-size:15px;margin:0 0 12px}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:9px}.metric{background:#f7fafb;border:1px solid #e6edf1;border-radius:11px;padding:11px}.metric b{font-size:19px;color:var(--navy)}.metric span{display:block;font-size:11px;color:var(--muted)}
.queue-box{display:flex;align-items:center;justify-content:space-between;padding:12px;border:1px solid #efdda9;background:#fff9ea;border-radius:12px}.queue-count{width:34px;height:34px;border-radius:10px;background:#faefcf;color:#8f6a19;display:grid;place-items:center;font-weight:850}
.overlay{display:none;position:fixed;inset:0;z-index:80;background:rgba(5,19,33,.77);backdrop-filter:blur(8px);padding:18px;overflow:auto}
.modal{max-width:1120px;margin:10px auto;background:#fff;border-radius:22px;overflow:hidden;box-shadow:0 30px 90px rgba(0,0,0,.3)}
.modal-head{display:flex;justify-content:space-between;gap:18px;padding:19px 21px;border-bottom:1px solid var(--line)}.modal-head h2{font-size:21px;margin:5px 0}.modal-head small{color:var(--teal);font-weight:850;letter-spacing:.1em}
.close{width:39px;height:39px;border:1px solid var(--line);border-radius:11px;background:#fff;font-size:21px;cursor:pointer}
.study-grid{display:grid;grid-template-columns:350px 1fr;min-height:70vh}.study-copy{padding:23px;background:#fbfcfd;border-right:1px solid var(--line)}.saved{padding:12px;border:1px solid #cce4df;background:#edf8f5;color:var(--teal);border-radius:11px;font-weight:750;font-size:13px}.excerpt{padding:16px;border:1px solid var(--line);background:#fff;border-radius:13px;line-height:1.7;font-size:14px}.excerpt mark{background:#ffe893;border-radius:3px;padding:1px 3px}.book{background:#e9f0f3}.book-head{display:flex;justify-content:space-between;padding:12px 15px;background:#fff;border-bottom:1px solid var(--line);font-size:13px}.page-wrap{padding:20px;display:flex;justify-content:center}.page{width:min(100%,760px);position:relative;background:#fff;box-shadow:0 10px 32px rgba(10,32,56,.15)}.page img{display:block;width:100%}.hl{position:absolute;left:8.4%;width:81%;border:3px solid #e8b72d;background:rgba(255,229,94,.34);border-radius:5px;pointer-events:none}
.paywall .modal-head{display:block;text-align:center;padding:28px 24px 20px}.paywall .modal-head h2{font-size:31px}.paywall .modal-head p{max-width:660px;margin:9px auto 0;color:var(--muted);line-height:1.6}
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;padding:23px}.plan{position:relative;padding:21px;border:1px solid var(--line);border-radius:17px}.plan.featured{border:2px solid var(--teal);box-shadow:0 14px 32px rgba(27,125,116,.13)}.badge{position:absolute;top:-11px;left:50%;transform:translateX(-50%);background:var(--teal);color:#fff;border-radius:999px;padding:5px 10px;font-size:10px;font-weight:850;white-space:nowrap}.plan h3{font-size:19px;margin:0}.price{font-size:35px;font-weight:900;color:var(--navy);margin:8px 0 1px}.period,.fine{font-size:12px;color:var(--muted)}.daily{margin:11px 0;padding:8px;background:#f5f9fa;border-radius:9px;color:var(--teal);font-size:12px;font-weight:800}.plan ul{padding-left:18px;color:var(--muted);font-size:13px;line-height:1.65;min-height:106px}.plan .btn{width:100%}
.notice{padding:13px 15px;border:1px solid #ead69a;background:#fff8e7;border-radius:12px;color:#755c1c;font-size:13px;line-height:1.5}
.pricing-head{text-align:center;max-width:720px;margin:0 auto 28px}.pricing-head h1{font-size:42px}.pricing-head p{color:var(--muted);line-height:1.7}
.queue-list{display:grid;gap:12px}.queue-item{padding:18px;display:flex;justify-content:space-between;gap:18px;align-items:flex-start}.queue-item p{color:var(--muted);margin:5px 0 0;font-size:13px;line-height:1.5}.empty{text-align:center;padding:50px 20px;color:var(--muted)}
footer{border-top:1px solid var(--line);background:#fff}.footer-inner{max-width:1120px;margin:auto;padding:24px 22px;color:var(--muted);font-size:12px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
@media(max-width:900px){.hero{grid-template-columns:1fr}.feature-grid{grid-template-columns:1fr}.practice-layout{grid-template-columns:1fr}.side{grid-template-columns:1fr 1fr}.study-grid{grid-template-columns:1fr}.study-copy{border-right:0;border-bottom:1px solid var(--line)}}
@media(max-width:720px){nav a:not(.nav-cta){display:none}.container{padding:28px 16px 55px}.header-inner{padding:12px 16px}h1{font-size:39px}.hero{padding-top:22px}.stats{grid-template-columns:1fr}.side{grid-template-columns:1fr}.meta{align-items:flex-start;flex-direction:column}.quiz-top,.quiz-body{padding-left:19px;padding-right:19px}.question{font-size:23px}.plan-grid{grid-template-columns:1fr}.overlay{padding:7px}.page-wrap{padding:9px}.pricing-head h1{font-size:34px}.queue-item{flex-direction:column}}