:root{
  --blue:#1E7FD6; --blue-d:#1666b0; --green:#3FA66B; --ink:#26303f;
  --grey:#60708a; --line:#e3ebf3; --bg:#f4f8fc; --bg2:#e6f0f8; --card:#fff;
  --radius:14px; --shadow:0 6px 24px rgba(40,60,90,.08); --maxw:1080px;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",system-ui,Arial,sans-serif;color:var(--ink);
  background:linear-gradient(180deg,var(--bg),var(--bg2));min-height:100vh;line-height:1.55}
a{color:var(--blue);text-decoration:none}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 0;
  border-bottom:1px solid var(--line);background:rgba(255,255,255,.7);backdrop-filter:blur(6px);
  position:sticky;top:0;z-index:50}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink)}
.brand img{height:38px}
.nav a{margin-left:18px;color:var(--grey);font-weight:600}
.nav a:hover{color:var(--blue)}
h1{font-size:2.1rem;line-height:1.15;margin:.2em 0}
h2{font-size:1.4rem;margin:.4em 0}
.eyebrow{color:var(--blue);font-weight:700;letter-spacing:.02em;font-size:.85rem;text-transform:uppercase}
.muted{color:var(--grey)}
.accent{height:5px;width:64px;background:var(--green);border-radius:3px;margin:14px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px}
.grid{display:grid;gap:18px}
.btn{display:inline-block;background:var(--blue);color:#fff;border:0;border-radius:10px;
  padding:12px 22px;font-weight:700;font-size:1rem;cursor:pointer;transition:.15s}
.btn:hover{background:var(--blue-d)}
.btn.ghost{background:#fff;color:var(--blue);border:2px solid var(--blue)}
.btn.green{background:var(--green)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.lg{padding:15px 30px;font-size:1.1rem}
input,select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font-size:1rem;font-family:inherit;background:#fbfdff}
input:focus{outline:2px solid var(--blue);border-color:var(--blue)}
label{font-weight:600;font-size:.9rem;display:block;margin:12px 0 5px}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
/* Hero */
.hero{padding:60px 0 30px;text-align:center}
.hero h1{font-size:2.8rem}
.hero p{font-size:1.2rem;color:var(--grey);max-width:680px;margin:14px auto}
.badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin:18px 0}
.chip{background:#eaf3fc;color:var(--blue);border-radius:999px;padding:6px 14px;font-weight:600;font-size:.9rem}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:36px 0}
/* Modal */
.modal-bg{position:fixed;inset:0;background:rgba(20,30,45,.5);display:none;align-items:center;
  justify-content:center;z-index:100;padding:16px}
.modal-bg.open{display:flex}
.modal{background:#fff;border-radius:var(--radius);max-width:420px;width:100%;padding:28px;box-shadow:var(--shadow)}
.tabs{display:flex;gap:8px;margin-bottom:14px}
.tabs button{flex:1;background:#eef4fa;border:0;padding:10px;border-radius:8px;font-weight:700;cursor:pointer;color:var(--grey)}
.tabs button.active{background:var(--blue);color:#fff}
.err{color:#c0392b;font-size:.9rem;margin-top:8px;min-height:1.2em}
/* Portal */
.progress-outer{background:#e6eef6;border-radius:999px;height:12px;overflow:hidden}
.progress-inner{background:var(--green);height:100%;width:0;transition:width .4s}
.module{margin:14px 0}
.module h2{display:flex;align-items:center;gap:10px;cursor:pointer;justify-content:space-between}
.mtag{background:var(--blue);color:#fff;border-radius:8px;font-size:.85rem;padding:3px 10px;font-weight:700}
.lessons{display:none;margin-top:6px}
.lessons.open{display:block}
.lesson{display:flex;align-items:center;gap:12px;padding:11px 12px;border:1px solid var(--line);
  border-radius:10px;margin:7px 0;cursor:pointer;background:#fbfdff}
.lesson:hover{border-color:var(--blue)}
.lesson .num{font-weight:700;color:var(--blue);min-width:34px}
.lesson .ok{color:var(--green);font-weight:700;margin-left:auto}
video{width:100%;border-radius:12px;background:#000}
/* Quiz */
.q{border:1px solid var(--line);border-radius:12px;padding:18px;margin:14px 0;background:#fff}
.q .qhead{font-weight:700;margin-bottom:10px}
.opt{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);
  border-radius:9px;margin:7px 0;cursor:pointer}
.opt:hover{border-color:var(--blue);background:#f6fafe}
.opt input{width:auto;margin-top:4px}
.result{text-align:center;padding:30px}
.result .big{font-size:3rem;font-weight:800}
.pass{color:var(--green)} .fail{color:#c0392b}
.footer{text-align:center;color:var(--grey);font-size:.85rem;padding:40px 0 24px}
@media(max-width:600px){.hero h1{font-size:2rem}h1{font-size:1.6rem}}