:root{--bg:#f6f8fb;--ink:#10233a;--muted:#5f6f82;--gold:#c5a24d;--card:#fff;--line:#dce4ee;--ok:#ebfff3;--warn:#fff4e5;--danger:#fff0f0;--shadow:0 12px 30px rgba(16,35,58,.08)}*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;background:var(--bg);color:var(--ink)}a{text-decoration:none;color:inherit}.container{max-width:1120px;margin:0 auto;padding:0 20px}.row{display:flex}.between{justify-content:space-between}.center{align-items:center}.topbar{background:#0f2a44;color:#fff;position:sticky;top:0;z-index:10}.brand{font-weight:800;padding:18px 0}.brand span{display:block;color:#d1dfed;font-size:13px;font-weight:500}.nav{display:flex;gap:16px;align-items:center}.hero{padding:70px 0;background:linear-gradient(135deg,#0f2a44,#1a4a73);color:#fff}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center}.hero h1{font-size:46px;line-height:1.05;margin:0 0 14px}.hero p{font-size:18px;color:#dbe7f2}.badge{display:inline-block;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);margin-bottom:16px;font-size:13px}.card{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.panel{padding:24px}.btn{display:inline-block;padding:13px 18px;border-radius:14px;background:var(--gold);color:#10233a;font-weight:700;border:none;cursor:pointer}.btn-secondary{background:#fff;color:#0f2a44}.btn-sm{padding:10px 14px;border-radius:12px;background:var(--gold);color:#10233a;font-weight:700}.section{padding:46px 0}.section h2{margin:0 0 10px;font-size:32px}.muted{color:var(--muted)}.stats,.grid-3,.grid-2{display:grid;gap:18px}.stats,.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.stat{padding:22px;border-radius:22px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}.course-card{display:flex;flex-direction:column}.course-cover{height:140px;border-radius:18px;background:linear-gradient(135deg,#0f2a44,#35608b);color:#fff;padding:18px;font-weight:800;display:flex;align-items:end}.course-body{padding:18px}.pill{display:inline-block;padding:6px 10px;border-radius:999px;background:#eef4fb;color:#345a84;font-size:12px;font-weight:700}.price{font-size:24px;font-weight:800;margin:10px 0}.form{display:grid;gap:14px}.field label{display:block;font-weight:700;margin-bottom:8px}.field input,.field textarea,.field select{width:100%;padding:13px 14px;border:1px solid #cdd8e4;border-radius:14px;background:#fff;font-size:15px}.field textarea{min-height:130px}.auth-wrap{max-width:560px;margin:40px auto}.alert{padding:14px 16px;border-radius:14px;margin:18px 0}.alert-success{background:var(--ok);border:1px solid #bce7cd}.alert-error{background:var(--danger);border:1px solid #f0b8b8}.dashboard-grid{display:grid;grid-template-columns:280px 1fr;gap:22px}.sidebar{padding:20px}.menu{display:grid;gap:8px}.menu a{padding:11px 12px;border-radius:12px}.menu a:hover{background:#eef4fb}.progress{height:12px;background:#edf2f8;border-radius:999px;overflow:hidden}.progress span{display:block;height:100%;background:linear-gradient(90deg,#c5a24d,#e1c476)}.list{display:grid;gap:12px}.list-item{padding:16px;border:1px solid var(--line);border-radius:16px;background:#fff}.lesson-content{line-height:1.7;font-size:16px}iframe{border:0;border-radius:18px;width:100%;min-height:360px;background:#000}.quiz-option{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:14px;margin-bottom:10px;background:#fff}.result-good{background:var(--ok);padding:16px;border-radius:16px;border:1px solid #bce7cd}.result-bad{background:var(--warn);padding:16px;border-radius:16px;border:1px solid #f1d8a8}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:12px;border-bottom:1px solid var(--line);text-align:left}.certificate{max-width:900px;margin:30px auto;padding:50px;background:#fff;border:8px solid #e7d6ab;border-radius:22px;box-shadow:var(--shadow);text-align:center}.certificate h1{font-size:42px;margin:12px 0}.small{font-size:13px;color:var(--muted)}.footer{padding:28px 0;color:#6e7e90}@media(max-width:900px){.hero-grid,.grid-3,.grid-2,.stats,.dashboard-grid{grid-template-columns:1fr}.hero h1{font-size:34px}.nav{gap:10px;font-size:14px}}