:root{
  --bg:#f6f8fc; --card:#fff; --ink:#0f172a; --muted:#64748b;
  --brand:#1e40af; --brand-2:#3b82f6; --accent:#06b6d4;
  --line:#e2e8f0; --ring:rgba(59,130,246,.25);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:'Inter',system-ui,Segoe UI,Roboto,Arial,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

/* Header */
.hdr{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.85);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
.hdr-row{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);color:#fff;font-weight:800;font-size:13px;letter-spacing:.5px}
.logo-name{color:var(--ink)}
.nav{display:flex;gap:24px}
.nav a{color:var(--muted);font-weight:500}
.nav a:hover{color:var(--brand)}
@media (max-width:720px){.nav{display:none}}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:12px 18px;font-weight:600;transition:.15s transform,.15s box-shadow,.15s background}
.btn-sm{padding:9px 14px;font-size:14px;border-radius:10px}
.btn-lg{padding:14px 22px;font-size:16px}
.btn-block{display:flex;width:100%}
.btn-primary{background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);color:#fff;box-shadow:0 8px 20px -8px rgba(30,64,175,.5)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 24px -10px rgba(30,64,175,.6)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--brand);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand-2);color:var(--brand-2)}
.btn-max{background:#0f172a;color:#fff;border:1px solid #0f172a;box-shadow:0 8px 20px -8px rgba(15,23,42,.55)}
.btn-max:hover{background:#1e293b;transform:translateY(-1px);box-shadow:0 12px 26px -10px rgba(15,23,42,.65)}
.max-ico{width:22px;height:22px;border-radius:6px;background:#fff;padding:2px;object-fit:contain}
.max-ico-lg{width:28px;height:28px;border-radius:8px;padding:3px}

/* Hero */
.hero{padding:72px 0 56px;background:radial-gradient(1200px 400px at 80% -50%,rgba(59,130,246,.18),transparent 60%),radial-gradient(800px 300px at -10% 110%,rgba(6,182,212,.18),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
@media (max-width:880px){.hero-grid{grid-template-columns:1fr;gap:32px}}
.badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);padding:6px 12px;border-radius:999px;font-size:13px;font-weight:600;color:var(--muted)}
.hero h1{font-size:clamp(32px,4.5vw,52px);font-weight:800;letter-spacing:-.02em;margin:18px 0 14px;line-height:1.1}
.accent{background:linear-gradient(120deg,var(--brand),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);font-size:18px;margin:0 0 28px;max-width:540px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-stats{list-style:none;padding:0;margin:36px 0 0;display:flex;gap:32px;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats b{font-size:24px;font-weight:800;color:var(--brand)}
.hero-stats span{font-size:13px;color:var(--muted)}

.hero-card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 30px 60px -30px rgba(15,23,42,.18);overflow:hidden}
.hero-card-head{display:flex;align-items:center;gap:8px;padding:14px 16px;background:#f1f5f9;border-bottom:1px solid var(--line);font-size:13px;font-weight:600;color:var(--muted)}
.dot{width:10px;height:10px;border-radius:50%}
.dot-r{background:#ef4444}.dot-y{background:#f59e0b}.dot-g{background:#10b981}
.hero-card-title{margin-left:8px}
.hero-card-body{padding:18px 18px 22px;display:flex;flex-direction:column;gap:14px}
.task{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:14px}
.task-q{font-weight:600;margin-bottom:8px}
.task-a{color:var(--muted);font-family:'JetBrains Mono','Consolas',monospace;font-size:14px}
.task-a b{color:var(--brand)}

/* Section */
.section{padding:72px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.h2{font-size:32px;font-weight:800;letter-spacing:-.01em;margin:0 0 8px;text-align:center}
.sub{text-align:center;color:var(--muted);margin:0 0 36px}

/* Subjects */
.subjects{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.subj{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 18px;text-align:left;transition:.15s transform,.15s box-shadow,.15s border-color;cursor:pointer}
.subj:hover{transform:translateY(-3px);border-color:var(--brand-2);box-shadow:0 16px 32px -16px rgba(30,64,175,.25)}
.subj-ico{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:12px}
.subj-name{font-weight:700;font-size:16px;margin-bottom:4px}
.subj-meta{color:var(--muted);font-size:13px}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media (max-width:780px){.steps{grid-template-columns:1fr}}
.step{padding:24px;border:1px solid var(--line);border-radius:14px;background:#fff}
.step-n{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));margin-bottom:14px}
.step h3{margin:0 0 6px;font-size:18px}
.step p{margin:0;color:var(--muted)}

/* FAQ */
.faq{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:18px 20px;font-weight:600;font-size:16px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q::after{content:'+';color:var(--brand);font-size:22px;font-weight:400}
.faq-item.open .faq-q::after{content:'−'}
.faq-a{padding:0 20px 18px;color:var(--muted);display:none}
.faq-item.open .faq-a{display:block}

/* Footer */
.ftr{padding:32px 0;border-top:1px solid var(--line);background:#fff;color:var(--muted);font-size:14px}
.ftr-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.ftr-links{display:flex;gap:18px;flex-wrap:wrap}
.ftr-links a:hover{color:var(--brand)}

/* Modal */
.modal{position:fixed;inset:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:20px}
.modal[hidden]{display:none}
.modal-bg{position:absolute;inset:0;background:rgba(15,23,42,.55);backdrop-filter:blur(4px)}
.modal-card{position:relative;background:#fff;border-radius:18px;padding:32px 28px;max-width:420px;width:100%;box-shadow:0 30px 80px -20px rgba(0,0,0,.4);animation:pop .18s ease-out}
.modal-card-lg{max-width:680px;max-height:80vh;overflow:auto}
@keyframes pop{from{transform:translateY(8px) scale(.98);opacity:0}to{transform:none;opacity:1}}
.modal-close{position:absolute;top:12px;right:12px;background:none;border:0;font-size:26px;color:var(--muted);width:36px;height:36px;border-radius:8px}
.modal-close:hover{background:#f1f5f9;color:var(--ink)}
.modal h3{margin:0 0 6px;font-size:22px}
.muted{color:var(--muted);margin:0 0 18px}

.form{display:flex;flex-direction:column;gap:14px;margin-top:8px}
.form label{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:14px}
.form input[type=email],.form input[type=text]{font:inherit;padding:12px 14px;border:1px solid var(--line);border-radius:10px;outline:none;transition:.15s border-color,.15s box-shadow}
.form input:focus{border-color:var(--brand-2);box-shadow:0 0 0 4px var(--ring)}
.check{flex-direction:row !important;align-items:flex-start;gap:10px !important;font-weight:400 !important;color:var(--muted);font-size:13px}
.check input{margin-top:3px}
.check a{color:var(--brand);text-decoration:underline}

.info-body{color:var(--muted);font-size:14.5px;line-height:1.65}
.info-body h4{color:var(--ink);margin-top:18px}
.info-body p{margin:8px 0}

/* Toast */
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:#0f172a;color:#fff;padding:12px 18px;border-radius:10px;box-shadow:0 12px 30px -10px rgba(0,0,0,.4);z-index:60;font-weight:500}
.toast[hidden]{display:none}