:root{
  --ink:#0f172a; --muted:#475569; --brand:#4f46e5; --ok:#16a34a; --line:#e5e7eb; --card:#ffffff; --bg:#f8fafc;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:Verdana, Geneva, Tahoma, sans-serif}
h1,h2,h3{font-family:'Trebuchet MS', Tahoma, Verdana, sans-serif}
.wrapper{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
@media(max-width:980px){.wrapper{grid-template-columns:1fr}}
.sidebar{position:sticky;top:0;align-self:start;height:100vh;padding:16px;border-right:1px solid var(--line);background:#fff}
.brand{font-weight:900;margin-bottom:10px;letter-spacing:.3px}
nav a{display:block;color:#334155;text-decoration:none;padding:10px 12px;border-radius:10px;font-weight:700}
nav a:hover{background:#eef2ff;color:#111827}
main{padding:0 0 40px}
.hero{max-width:1100px;margin:16px auto;border-radius:16px;overflow:hidden;box-shadow:0 12px 28px rgba(2,6,23,.12);position:relative}
.hero img{width:100%;display:block}
.hero .box{position:absolute;left:20px;bottom:20px;background:rgba(255,255,255,.9);padding:16px;border-radius:10px;max-width:520px}
.hero .actions{margin-top:10px;display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 14px;border-radius:6px;font-weight:800;text-decoration:none}
.btn.primary{background:var(--brand);color:#fff}
.btn.secondary{background:#fff;color:var(--brand);border:2px solid var(--brand)}
.container{max-width:1100px;margin:0 auto;padding:0 16px;display:grid;grid-template-columns:2fr 1fr;gap:22px}
@media(max-width:980px){.container{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;box-shadow:0 6px 16px rgba(2,6,23,.06)}
.kicker{display:inline-block;background:#e0e7ff;color:#3730a3;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:800;letter-spacing:.3px;margin-bottom:10px}
.lead{color:var(--muted);line-height:1.8}
.article img{width:100%;border-radius:12px;margin:12px 0}
ul{padding-left:18px}
.courses .grid{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:1000px){.courses .grid{grid-template-columns:repeat(2,1fr)}}
.course{background:#fff;border:1px dashed var(--line);border-radius:12px;padding:14px}
.price{color:#065f46;font-weight:800}
small.muted{color:var(--muted)}
form label{display:block;margin:10px 0 6px}
input,textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff}
.checkbox{display:flex;gap:12px;align-items:flex-start;margin-top:10px}
button{background:var(--ok);color:#fff;border:none;border-radius:8px;padding:12px 16px;font-weight:800;cursor:pointer;box-shadow:0 4px 12px rgba(22,163,74,.25)}
button:hover{filter:brightness(.97)}
footer{border-top:1px solid var(--line);padding:26px 16px;background:#fff;margin-top:22px}
footer .wrap{max-width:1100px;margin:0 auto;display:flex;flex-direction:column;gap:6px}
.modal{position:fixed;inset:0;background:rgba(2,6,23,.55);display:none;align-items:center;justify-content:center;padding:20px}
.modal .box{background:#fff;border-radius:12px;max-width:420px;width:100%;padding:22px;box-shadow:0 18px 60px rgba(2,6,23,.3);text-align:center}
.close{margin-top:14px;background:var(--brand)}