/* =====================================================================
   Rambutan Game 2026 — Design System
   Theme: Orange Rambutan / Black / White / Gold • Dark • Glassmorphism
   ===================================================================== */
:root{
  --orange:#ff6b00; --orange-2:#ff8c33; --orange-deep:#c4500a;
  --gold:#f5c542; --gold-2:#e0a800;
  --black:#0a0a0a; --black-2:#141414; --ink:#1a1a1a;
  --white:#ffffff; --muted:#9a9a9a; --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.05); --glass-brd:rgba(255,255,255,.12);
  --radius:18px; --shadow:0 20px 60px rgba(0,0,0,.45);
  --font:'Kanit','Sarabun',system-ui,-apple-system,'Segoe UI',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);background:var(--black);color:var(--white);
  line-height:1.6;overflow-x:hidden;
  background-image:radial-gradient(1200px 600px at 80% -10%,rgba(255,107,0,.16),transparent 60%),
                   radial-gradient(900px 500px at -10% 20%,rgba(245,197,66,.08),transparent 55%);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,92%);margin-inline:auto}
section{padding:90px 0;position:relative}
.section-tag{color:var(--orange);font-weight:600;letter-spacing:3px;text-transform:uppercase;font-size:.8rem}
.section-title{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:700;margin:.3rem 0 1.2rem}
.section-title .hl{background:linear-gradient(90deg,var(--orange),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.text-muted{color:var(--muted)}
.center{text-align:center}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.7rem;border-radius:999px;
  font-weight:600;font-size:1rem;cursor:pointer;border:none;transition:.25s;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--orange),var(--orange-deep));color:#fff;box-shadow:0 10px 30px rgba(255,107,0,.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(255,107,0,.5)}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-2));color:#1a1a1a}
.btn-ghost{background:var(--glass);border:1px solid var(--glass-brd);color:#fff;backdrop-filter:blur(10px)}
.btn-ghost:hover{border-color:var(--orange)}
.btn-lg{padding:1.05rem 2.2rem;font-size:1.1rem}

/* Glass card */
.glass{background:var(--glass);border:1px solid var(--glass-brd);backdrop-filter:blur(16px);
  border-radius:var(--radius);box-shadow:var(--shadow)}

/* Navbar */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:.3s;padding:18px 0}
.nav.scrolled{background:rgba(10,10,10,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);padding:12px 0}
.nav .container{display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.15rem}
.brand .logo{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--orange),var(--gold));
  display:grid;place-items:center;font-weight:800;color:#1a1a1a}
.nav-links{display:flex;gap:1.6rem;align-items:center}
.nav-links a{color:#ddd;font-size:.95rem;transition:.2s}
.nav-links a:hover{color:var(--orange)}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.6rem;cursor:pointer}

/* Hero */
.hero{min-height:100vh;display:flex;align-items:center;padding-top:90px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(2.4rem,6vw,4.6rem);font-weight:800;line-height:1.05}
.hero h1 .hl{background:linear-gradient(90deg,var(--orange),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .badge{display:inline-flex;gap:.5rem;align-items:center;background:var(--glass);border:1px solid var(--glass-brd);
  padding:.5rem 1rem;border-radius:999px;font-size:.85rem;margin-bottom:1.4rem}
.hero .badge .dot{width:8px;height:8px;border-radius:50%;background:var(--orange);box-shadow:0 0 12px var(--orange)}
.hero p.lead{color:#cfcfcf;font-size:1.15rem;margin:1.3rem 0 2rem;max-width:560px}
.hero-cta{display:flex;gap:1rem;flex-wrap:wrap}
.hero-art{position:relative;aspect-ratio:1;border-radius:30px;display:grid;place-items:center;
  background:radial-gradient(circle at 50% 40%,rgba(255,107,0,.35),transparent 60%);}
.hero-ball{font-size:clamp(8rem,22vw,16rem);filter:drop-shadow(0 30px 50px rgba(255,107,0,.4));animation:float 5s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0) rotate(-4deg)}50%{transform:translateY(-22px) rotate(4deg)}}

/* Countdown */
.countdown{display:flex;gap:14px;flex-wrap:wrap;margin-top:1rem}
.cd-box{flex:1;min-width:84px;text-align:center;padding:1.1rem .5rem}
.cd-num{font-size:clamp(1.8rem,5vw,2.8rem);font-weight:800;color:var(--gold);line-height:1}
.cd-label{font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:2px;margin-top:.4rem}

/* Stat / prize cards */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{padding:28px;transition:.3s}
.card:hover{transform:translateY(-6px);border-color:rgba(255,107,0,.5)}
.card .ico{font-size:2.2rem;margin-bottom:.7rem}
.card h3{font-size:1.25rem;margin-bottom:.4rem}

.prize{position:relative;text-align:center;padding:34px 22px;overflow:hidden}
.prize .rank{font-size:.85rem;letter-spacing:2px;text-transform:uppercase;color:var(--muted)}
.prize .amount{font-size:2.4rem;font-weight:800;margin:.4rem 0;background:linear-gradient(90deg,var(--gold),var(--orange));-webkit-background-clip:text;background-clip:text;color:transparent}
.prize.champion{border:1px solid var(--gold);box-shadow:0 0 40px rgba(245,197,66,.2)}
.prize.champion::before{content:"🏆";position:absolute;top:-10px;right:-10px;font-size:5rem;opacity:.12}

/* Category chips */
.cats{display:flex;flex-wrap:wrap;gap:12px}
.cat-chip{padding:.7rem 1.2rem;border-radius:999px;background:var(--glass);border:1px solid var(--glass-brd);font-size:.95rem}
.cat-chip b{color:var(--orange)}

/* Rules list */
.rules{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rule{display:flex;gap:.9rem;padding:18px;align-items:flex-start}
.rule .n{flex:none;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--orange),var(--orange-deep));
  display:grid;place-items:center;font-weight:700}

/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gallery .g{aspect-ratio:1;border-radius:14px;display:grid;place-items:center;font-size:2.6rem;
  background:linear-gradient(135deg,rgba(255,107,0,.18),rgba(245,197,66,.08));border:1px solid var(--line)}

/* Sponsors */
.sponsors{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;align-items:center}
.sponsor{padding:1rem 1.8rem;border-radius:14px;background:var(--glass);border:1px solid var(--glass-brd);color:var(--muted);font-weight:600}

/* FAQ */
.faq-item{padding:0 22px;cursor:pointer;margin-bottom:12px}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 0;font-weight:600}
.faq-q .plus{color:var(--orange);font-size:1.4rem;transition:.3s}
.faq-a{max-height:0;overflow:hidden;transition:.35s;color:var(--muted)}
.faq-item.open .faq-a{max-height:240px;padding-bottom:18px}
.faq-item.open .plus{transform:rotate(45deg)}

/* Map / contact */
.map-wrap{border-radius:var(--radius);overflow:hidden;border:1px solid var(--glass-brd);min-height:320px}
.map-wrap iframe{width:100%;height:360px;border:0;filter:grayscale(.2) contrast(1.05)}

/* Footer */
footer{padding:50px 0 30px;border-top:1px solid var(--line);background:rgba(0,0,0,.4)}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
footer h4{margin-bottom:1rem;color:var(--gold)}
footer a{color:var(--muted);display:block;padding:.25rem 0}
footer a:hover{color:var(--orange)}
.foot-bottom{text-align:center;color:var(--muted);margin-top:30px;padding-top:20px;border-top:1px solid var(--line);font-size:.85rem}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(30px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* Responsive */
@media(max-width:900px){
  .hero-grid,.foot-grid{grid-template-columns:1fr}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .rules,.gallery{grid-template-columns:1fr 1fr}
  .nav-links{position:fixed;inset:0 0 0 30%;flex-direction:column;justify-content:center;gap:1.6rem;
    background:rgba(10,10,10,.96);backdrop-filter:blur(16px);transform:translateX(100%);transition:.3s}
  .nav-links.open{transform:none}
  .nav-toggle{display:block;z-index:1001}
  .hero-art{display:none}
}
@media(max-width:560px){
  .grid-3,.grid-4,.gallery{grid-template-columns:1fr}
  section{padding:60px 0}
}