:root{
  --bg:#0b0b1a;
  --bg-2:#11122a;
  --surface:#181a36;
  --surface-2:#1f2147;
  --text:#eef0ff;
  --muted:#a4a8c7;
  --primary:#7c5cff;
  --primary-2:#22d3ee;
  --border:rgba(255,255,255,.08);
  --radius:14px;
  --grad:linear-gradient(135deg,#7c5cff 0%,#22d3ee 100%);
  --grad-soft:linear-gradient(135deg,rgba(124,92,255,.18),rgba(34,211,238,.18));
  --shadow:0 10px 30px -10px rgba(124,92,255,.45);
  --max:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}

/* NAV */
.nav{position:sticky;top:0;z-index:100;background:rgba(11,11,26,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav.scrolled{box-shadow:0 4px 20px rgba(0,0,0,.4)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem}
.brand strong{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.menu{display:flex;align-items:center;gap:6px}
.menu a{padding:8px 14px;border-radius:8px;font-size:.95rem;color:var(--muted);transition:all .2s}
.menu a:hover{color:var(--text);background:var(--surface)}
.menu a.active{color:var(--text);background:var(--grad-soft)}
.menu a.btn{color:#fff}
.hamburger{display:none;background:none;border:0;cursor:pointer;width:40px;height:40px;flex-direction:column;justify-content:center;align-items:center;gap:5px}
.hamburger span{width:24px;height:2px;background:var(--text);transition:.3s;border-radius:2px}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* BUTTONS */
.btn{display:inline-block;padding:14px 28px;border-radius:10px;font-weight:600;font-size:1rem;cursor:pointer;border:0;transition:transform .2s,box-shadow .2s,opacity .2s;text-align:center}
.btn:hover{transform:translateY(-2px)}
.btn-sm{padding:8px 18px;font-size:.9rem}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{box-shadow:0 14px 36px -10px rgba(124,92,255,.7)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--surface)}

/* HERO */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url('../assets/bg.jpg') center/cover no-repeat;opacity:.55;z-index:0}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 0%,var(--bg) 100%)}
.hero-inner{position:relative;z-index:1;text-align:center;padding:60px 20px;animation:fadeUp .8s ease both}
.pill{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--border);padding:8px 16px;border-radius:999px;font-size:.85rem;color:var(--muted);margin-bottom:24px}
.hero h1{font-size:clamp(2rem,5vw,3.6rem);line-height:1.15;margin-bottom:18px;font-weight:800;letter-spacing:-.02em}
.hero h1::after{content:"";display:block;width:80px;height:4px;background:var(--grad);margin:18px auto 0;border-radius:4px}
.lead{font-size:clamp(1rem,1.6vw,1.2rem);color:var(--muted);max-width:620px;margin:0 auto 32px}
.cta-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* SECTIONS */
.section{padding:80px 0}
.section.alt{background:var(--bg-2)}
.section h2{font-size:clamp(1.6rem,3vw,2.4rem);margin-bottom:8px;font-weight:700;letter-spacing:-.01em}
.section .sub{color:var(--muted);margin-bottom:36px}

/* CHAT */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.chat-card{max-width:720px;margin:0 auto}
.nick-form label{display:block;font-size:.9rem;color:var(--muted);margin-bottom:8px}
.nick-row{display:flex;gap:10px;flex-wrap:wrap}
.nick-row input{flex:1;min-width:200px;background:var(--bg);border:1px solid var(--border);color:var(--text);padding:14px 16px;border-radius:10px;font-size:1rem;outline:none;transition:border-color .2s}
.nick-row input:focus{border-color:var(--primary)}
.error{display:block;color:#ff6b8a;margin-top:10px;min-height:1.2em;font-size:.88rem}
.chat-frame{margin-top:20px;border-radius:10px;overflow:hidden;background:#000}
.chat-frame iframe{width:100%;height:560px;border:0;display:block}

/* SOBRE */
.two-col{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center}
.feature-list{list-style:none;display:grid;gap:12px}
.feature-list li{background:var(--surface);border:1px solid var(--border);padding:16px 20px;border-radius:10px;display:flex;align-items:center;gap:14px;font-size:1rem}
.feature-list span{font-size:1.4rem}

/* SALAS */
.rooms{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.room{background:var(--surface);border:1px solid var(--border);padding:24px;border-radius:var(--radius);transition:transform .2s,border-color .2s,box-shadow .2s;display:block}
.room:hover{transform:translateY(-4px);border-color:transparent;box-shadow:var(--shadow);background:linear-gradient(var(--surface),var(--surface)) padding-box,var(--grad) border-box;border:1px solid transparent}
.room h3{font-size:1.3rem;margin-bottom:8px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.room p{color:var(--muted);font-size:.95rem}

/* FAQ */
.faq{max-width:780px;margin:0 auto;display:grid;gap:12px}
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:0 20px;transition:background .2s}
.faq summary{padding:18px 0;cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;font-size:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.5rem;color:var(--primary);transition:transform .25s;font-weight:300}
.faq details[open]{background:var(--surface-2)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 18px;color:var(--muted)}

/* FOOTER */
.footer{background:#06061a;border-top:1px solid var(--border);padding:36px 0}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}
.footer nav{display:flex;gap:24px;flex-wrap:wrap;justify-content:center}
.footer nav a{color:var(--muted);font-size:.92rem;transition:color .2s}
.footer nav a:hover{color:var(--text)}
.copy{color:var(--muted);font-size:.85rem}

/* ANIM */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}

/* RESPONSIVE */
@media (max-width: 860px){
  .hamburger{display:flex}
  .menu{position:fixed;top:64px;left:0;right:0;background:var(--bg-2);flex-direction:column;align-items:stretch;padding:20px;gap:6px;border-bottom:1px solid var(--border);transform:translateY(-110%);transition:transform .3s;visibility:hidden}
  .menu.open{transform:none;visibility:visible}
  .menu a{padding:14px 18px;font-size:1rem}
  .two-col{grid-template-columns:1fr;gap:32px}
  .section{padding:60px 0}
  .hero{min-height:80vh}
}
@media (max-width: 480px){
  .nick-row{flex-direction:column}
  .nick-row .btn{width:100%}
  .btn{padding:12px 22px}
  .chat-frame iframe{height:480px}
}

@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* Sticky Login Button */
.sticky-login{
  position:fixed;
  bottom:24px;
  right:24px;
  z-index:999;
  background:var(--grad);
  color:#fff;
  padding:14px 28px;
  border-radius:50px;
  font-weight:700;
  font-size:1rem;
  box-shadow:0 8px 24px rgba(124,92,255,.5),0 4px 12px rgba(0,0,0,.3);
  border:0;
  cursor:pointer;
  transition:transform .2s,box-shadow .2s;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.sticky-login:hover{
  transform:translateY(-3px) scale(1.02);
  box-shadow:0 12px 32px rgba(124,92,255,.6),0 6px 16px rgba(0,0,0,.4);
}
.sticky-login::before{
  content:"👤";
  font-size:1.1rem;
}
@media (max-width: 480px){
  .sticky-login{
    bottom:16px;
    right:16px;
    padding:12px 22px;
    font-size:.95rem;
  }
}