/* ============ RESET + FONT ============ */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Quicksand','Segoe UI',Arial,sans-serif;
  color:#f3f3f7;
  min-height:100vh;
  background:
    radial-gradient(1100px 600px at 80% -10%, #ff4e6822 0%, transparent 60%),
    radial-gradient(900px 700px at -10% 110%, #ffae0033 0%, transparent 60%),
    linear-gradient(160deg,#0c0916 0%,#190c2a 50%,#0a0814 100%);
  overflow-x:hidden;
}
a{color:#ffd166;text-decoration:none}
a:hover{color:#fff}

/* floating stars background */
body::before{
  content:"";
  position:fixed;inset:0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, #fff7 0, transparent 50%),
    radial-gradient(1px 1px at 70% 10%, #fff5 0, transparent 50%),
    radial-gradient(2px 2px at 40% 80%, #fff8 0, transparent 50%),
    radial-gradient(1px 1px at 90% 60%, #fff6 0, transparent 50%),
    radial-gradient(1px 1px at 10% 70%, #fff7 0, transparent 50%);
  pointer-events:none;
  animation:twinkle 6s ease-in-out infinite alternate;
  z-index:0;
}
@keyframes twinkle{from{opacity:.4}to{opacity:.9}}

/* ============ TOPBAR ============ */
.topbar{
  position:relative;z-index:5;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 32px;
  background:linear-gradient(90deg, rgba(20,8,40,.85), rgba(40,8,30,.85));
  border-bottom:1px solid #ff4e6833;
  backdrop-filter:blur(8px);
}
.topbar .brand{display:flex;align-items:center;gap:12px}
.topbar .brand img{height:42px;filter:drop-shadow(0 0 12px #ff4e68aa)}
.topbar .brand b{font-size:1.2rem;letter-spacing:1px;color:#ffd166}
.topbar nav a{
  margin:0 6px;padding:8px 14px;border-radius:999px;
  color:#eee;font-weight:600;font-size:.92rem;
  transition:all .25s;
}
.topbar nav a:hover{background:#ff4e6833;color:#fff}
.topbar nav a.cta{
  background:linear-gradient(135deg,#ff4e68,#ffae00);color:#fff;
  box-shadow:0 6px 18px #ff4e6855;
}
.topbar nav a.cta:hover{transform:translateY(-1px);box-shadow:0 10px 22px #ff4e6877}

/* ============ LAYOUT ============ */
.shell{
  position:relative;z-index:2;
  max-width:1200px;margin:30px auto;padding:0 20px;
  display:grid;grid-template-columns:320px 1fr;gap:24px;
}
@media (max-width:900px){.shell{grid-template-columns:1fr}}

.card{
  background:linear-gradient(160deg, rgba(34,16,56,.85), rgba(22,10,40,.85));
  border:1px solid #ffffff10;
  border-radius:18px;
  padding:22px;
  box-shadow:0 18px 50px #0008, inset 0 1px 0 #ffffff10;
  backdrop-filter:blur(10px);
}
.card h2,.card h3{margin:0 0 14px;color:#ffd166}
.card h3{font-size:1.05rem}

/* ============ SIDEBAR ============ */
.sidebar{display:flex;flex-direction:column;gap:18px}

.widget-title{
  display:flex;align-items:center;gap:8px;
  font-weight:700;color:#ffd166;
  margin-bottom:12px;font-size:1.05rem;
}
.widget-title::before{content:"";width:6px;height:18px;background:linear-gradient(180deg,#ff4e68,#ffae00);border-radius:3px}

/* server-list (sidebar) */
.server-list{display:flex;flex-direction:column;gap:10px}
.server-list .srv{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 14px;border-radius:12px;
  background:rgba(255,255,255,.04);
  border:1px solid #ffffff10;
  transition:all .2s;
}
.server-list .srv:hover{background:rgba(255,78,104,.15);border-color:#ff4e68}
.server-list .name{font-weight:600;color:#fff}
.server-list .badge{
  font-size:.7rem;padding:2px 8px;border-radius:999px;
  background:linear-gradient(135deg,#22c55e,#84cc16);color:#0a1c0a;font-weight:700;
}
.server-list .empty{padding:14px;color:#ff8b8b;text-align:center;font-size:.9rem}

/* ============ FORMS ============ */
.form-row{margin:14px 0}
.form-row label{
  display:block;margin-bottom:6px;color:#bfb8d4;font-size:.85rem;font-weight:600;
}
.form-row input{
  width:100%;padding:12px 14px;
  background:rgba(0,0,0,.35);color:#fff;
  border:1px solid #ffffff18;border-radius:10px;
  font-size:.95rem;outline:none;transition:all .2s;
}
.form-row input:focus{
  border-color:#ff4e68;box-shadow:0 0 0 3px #ff4e6833;
  background:rgba(0,0,0,.5);
}
.btn{
  display:inline-block;width:100%;padding:13px;
  background:linear-gradient(135deg,#ff4e68,#ffae00);
  color:#fff;border:none;border-radius:10px;
  font-weight:700;font-size:1rem;cursor:pointer;
  letter-spacing:.5px;text-transform:uppercase;
  box-shadow:0 8px 22px #ff4e6855;
  transition:all .25s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px #ff4e6877}
.btn:active{transform:translateY(0)}
.btn.secondary{background:linear-gradient(135deg,#4a90e2,#5b73e8);box-shadow:0 8px 22px #4a90e255}
.btn.green{background:linear-gradient(135deg,#22c55e,#84cc16);box-shadow:0 8px 22px #22c55e55}
.btn.ghost{
  background:transparent;color:#ffd166;border:1.5px solid #ffd16677;box-shadow:none;
}
.btn.ghost:hover{background:#ffd16622;color:#fff}

.msg-error{
  margin:10px 0;padding:10px 14px;
  background:#ff4e6822;border:1px solid #ff4e6855;
  border-radius:10px;color:#ffb3c0;font-size:.92rem;
}
.msg-ok{
  margin:10px 0;padding:10px 14px;
  background:#22c55e22;border:1px solid #22c55e55;
  border-radius:10px;color:#bdf7c8;font-size:.92rem;
}
.muted{color:#9d96b4;font-size:.85rem;margin-top:8px;text-align:center}

/* ============ HERO (welcome bên main) ============ */
.hero{
  position:relative;overflow:hidden;
  padding:36px;border-radius:18px;
  background:
    linear-gradient(135deg, #ff4e6833 0%, transparent 60%),
    linear-gradient(225deg, #ffae0033 0%, transparent 60%),
    rgba(20,10,40,.9);
  border:1px solid #ffffff10;
  margin-bottom:20px;
  box-shadow:0 18px 50px #0008;
}
.hero h1{
  margin:0 0 8px;font-size:2.2rem;
  background:linear-gradient(135deg,#ffd166,#ff4e68 60%,#ffae00);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-weight:800;
}
.hero p{margin:0;color:#cfc7e3;font-size:1.05rem;max-width:560px}
.hero .corner{
  position:absolute;right:-40px;top:-40px;
  width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle, #ff4e68 0%, transparent 70%);
  filter:blur(20px);opacity:.6;
}

/* ============ PLAY PAGE ============ */
.play-stage{
  width:1000px;max-width:100%;height:600px;margin:0 auto;
  background:#000;border-radius:14px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 25px 60px #000a;
  border:2px solid #ff4e6855;
}
.opt-grid{
  display:grid;grid-template-columns:repeat(auto-fit, minmax(280px,1fr));
  gap:14px;margin-top:16px;
}
.opt{
  background:rgba(15,52,96,.4);border:1px solid #ffffff15;
  border-radius:12px;padding:18px;
}
.opt h3{margin:0 0 8px;color:#ffd166;font-size:1rem}
.opt code{
  background:#0f3460;color:#7ec8e3;padding:2px 6px;border-radius:4px;
  font-family:Consolas,monospace;font-size:.85rem;word-break:break-all;
}
.opt small{color:#aaa;font-size:.82rem;display:block;margin-top:6px}
.urlbox{
  width:100%;height:60px;margin-top:8px;
  padding:8px;font-family:Consolas,monospace;font-size:.78rem;
  background:#0f3460;color:#7ec8e3;border:1px solid #444;border-radius:6px;resize:vertical;
}

/* ============ FOOTER ============ */
footer{
  position:relative;z-index:2;
  text-align:center;padding:30px 20px;
  color:#988fb4;font-size:.85rem;
  border-top:1px solid #ffffff10;margin-top:40px;
}
footer .logo{opacity:.5}