:root{--bg:#fff;--fg:#0f172a;--muted:#6b7280;--accent:#0ea5a4;--card:#f8fafc;--shadow:0 4px 14px rgba(0,0,0,0.08)}*{box-sizing:border-box}body{margin:0;font-family:"Inter",system-ui,sans-serif;background:var(--bg);color:var(--fg);transition:background .3s,color .3s}header{background:var(--bg);border-bottom:1px solid rgba(0,0,0,0.08);position:sticky;top:0;z-index:50;box-shadow:var(--shadow)}.nav-container{max-width:1100px;margin:0 auto;padding:.8rem 1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}.brand{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--fg);font-weight:700}.logo{width:170px;height:42px;border-radius:8px;background:linear-gradient(135deg,var(--accent),#06b6d4);display:flex;align-items:center;justify-content:center;color:var(--bg);font-weight:700}nav ul{list-style:none;display:flex;gap:1rem;margin:0;padding:0;align-items:center}nav a{text-decoration:none;color:var(--fg);font-weight:500;display:flex;align-items:center;gap:.4rem;transition:color .2s}nav a:hover{color:var(--accent)}nav li{position:relative}.dropdown ul{position:absolute;background:var(--card);border-radius:8px;box-shadow:var(--shadow);top:120%;left:0;padding:.5rem;list-style:none;margin:0;min-width:180px;opacity:0;pointer-events:none;transform:translateY(-8px);transition:opacity .25s ease,transform .25s ease}.dropdown:hover ul,.dropdown:focus-within ul{opacity:1;transform:translateY(0);pointer-events:auto}.dropdown ul li a{padding:.5rem .7rem;display:block;border-radius:6px}.dropdown ul li a:hover{background:rgba(14,165,164,0.12)}.nav-toggle{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer;color:var(--fg)}@media(max-width:768px){nav{display:none;width:100%;background:var(--bg);border-top:1px solid rgba(0,0,0,0.08);padding:.8rem}nav.open{display:block;animation:fadeIn .25s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}nav ul{flex-direction:column;align-items:flex-start}.dropdown ul{position:static;box-shadow:none;opacity:1;transform:none;pointer-events:auto;display:none}.dropdown.open ul{display:block}.nav-toggle{display:block}}.container{max-width:1100px;margin:0 auto;padding:2rem 1rem}.hero{margin-top:2rem}.hero h1{font-size:clamp(1.6rem,3.5vw,2.6rem)}.btn{display:inline-block;padding:.6rem .9rem;border-radius:10px;background:var(--accent);color:var(--bg);text-decoration:none;font-weight:600}footer{border-top:1px solid rgba(0,0,0,0.08);padding-top:1rem;color:var(--muted)}