:root{
  --blue:#1877F2;
  --blue-dark:#0f5fd0;
  --blue-light:#eaf2ff;
  --text:#1c1e21;
  --muted:#65676b;
  --border:#e4e6eb;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:#fff;line-height:1.6}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{max-width:1100px;margin:0 auto;padding:0 20px}

/* Header */
header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--border);backdrop-filter:blur(8px)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--blue)}
.brand img{height:36px;width:36px;border-radius:8px;object-fit:cover}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-weight:600;color:var(--text);transition:color .2s}
.nav-links a:hover{color:var(--blue)}
.menu-btn{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--blue)}

/* Hero */
.hero{background:linear-gradient(160deg,var(--blue-light) 0%,#fff 70%);padding:70px 0 60px}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.hero h1{font-size:52px;line-height:1.1;color:var(--blue);margin-bottom:20px}
.hero p.lead{font-size:19px;color:var(--muted);margin-bottom:30px}
.dl-label{font-weight:700;font-size:15px;color:var(--text);margin-bottom:10px}
.btn-download{display:inline-flex;align-items:center;gap:10px;background:var(--blue);color:#fff;padding:16px 40px;border-radius:12px;font-size:18px;font-weight:700;box-shadow:0 10px 25px rgba(24,119,242,.35);transition:transform .15s,background .2s}
.btn-download:hover{background:var(--blue-dark);transform:translateY(-2px)}
.hero-img{border-radius:24px;box-shadow:0 20px 50px rgba(0,0,0,.15)}

/* Sections */
section{padding:70px 0}
.section-title{font-size:34px;color:var(--blue);text-align:center;margin-bottom:14px}
.section-sub{text-align:center;color:var(--muted);max-width:640px;margin:0 auto 40px}
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature{background:#fff;border:1px solid var(--border);border-radius:16px;padding:28px;text-align:center;transition:transform .2s,box-shadow .2s}
.feature:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(24,119,242,.12)}
.feature .icon{font-size:38px;margin-bottom:14px}
.feature h3{color:var(--blue);margin-bottom:8px}
.feature p{color:var(--muted);font-size:15px}

.alt{background:var(--blue-light)}
.longtext{max-width:800px;margin:0 auto;color:var(--muted);font-size:17px;white-space:pre-line}

.about-box{max-width:760px;margin:0 auto;text-align:center;color:var(--muted);font-size:17px}

/* Ticket form */
.ticket-form{max-width:620px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:18px;padding:34px;box-shadow:0 10px 30px rgba(0,0,0,.05)}
.ticket-form label{display:block;font-weight:600;margin:16px 0 6px}
.ticket-form input,.ticket-form textarea{width:100%;padding:14px;border:1px solid var(--border);border-radius:10px;font-size:15px;font-family:inherit}
.ticket-form textarea{min-height:150px;resize:vertical}
.ticket-form input:focus,.ticket-form textarea:focus{outline:none;border-color:var(--blue)}
.btn-primary{margin-top:20px;background:var(--blue);color:#fff;border:none;padding:14px 32px;border-radius:10px;font-size:16px;font-weight:700;cursor:pointer;width:100%}
.btn-primary:hover{background:var(--blue-dark)}
.flash{max-width:620px;margin:0 auto 20px;padding:14px 18px;border-radius:10px;background:#e6f7ec;color:#1a7f3c;text-align:center;font-weight:600}

/* Footer */
footer{background:#0d1b2e;color:#cbd5e1;padding:50px 0 24px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px;margin-bottom:30px}
footer h4{color:#fff;margin-bottom:14px}
footer a{color:#cbd5e1}
footer a:hover{color:#fff}
footer ul{list-style:none}
footer ul li{margin-bottom:8px}
.socials{display:flex;gap:14px;margin-top:16px}
.socials a{width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;font-size:20px;transition:background .2s}
.socials a:hover{background:var(--blue)}
.copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;text-align:center;color:#94a3b8;font-size:14px}

@media(max-width:820px){
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .hero h1{font-size:38px}
  .hero-img{margin:0 auto;max-width:340px}
  .features{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .nav-links{position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--border);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:16px 20px;width:100%;border-top:1px solid var(--border)}
  .menu-btn{display:block}
}