/* Fonts and base */
:root{
  --bg:#0a0b10;
  --grid:#101320;
  --card:#0e1320cc;
  --glass:rgba(18, 24, 38, 0.55);
  --txt:#e6ecff;
  --muted:#9aa7d9;
  --accent:#6ae2ff;
  --accent-2:#a66bff;
  --danger:#ff6b8a;
  --success:#39e29d;
  --shadow: 0 10px 30px -10px rgba(0,0,0,.6), 0 20px 60px -20px rgba(82,97,193,.35);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family:'Outfit',system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,'Helvetica Neue',Arial,sans-serif;
  color:var(--txt); background:radial-gradient(1200px 800px at 80% -10%, rgba(166,107,255,.25), transparent 60%),
           radial-gradient(1000px 700px at -10% 110%, rgba(106,226,255,.25), transparent 60%), var(--bg);
  overflow:auto;
}

/* Animated grid background */
.grid-overlay{
  position:fixed; inset:0; background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 40px 40px, 40px 40px;
  background-position: center center;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  animation: drift 20s linear infinite;
  pointer-events:none;
}
@keyframes drift{ 0%{transform:translateY(0)} 100%{transform:translateY(40px)} }

/* Canvas particles sits under content */
#bg-particles{ position:fixed; inset:0; z-index:0; filter: blur(.2px); }

.auth{
  position:relative; z-index:1; height:100%; display:grid; grid-template-columns: min(720px, 92vw); gap: clamp(20px, 3vw, 28px);
  justify-content:center; align-content:center; padding: clamp(20px, 4vw, 48px);
}

.brand{
  transform: translateZ(0); perspective: 1000px; padding: clamp(10px, 2vw, 24px);
}
.brand .logo{ display:flex; align-items:center; gap:14px; margin-bottom:8px; }
.brand h1{ font-size: clamp(26px, 5vw, 48px); letter-spacing: .5px; margin:0; font-weight:700; }
.brand h1 span{ color: var(--accent); text-shadow: 0 0 22px rgba(106,226,255,.5); }
.brand .tag{ color:var(--muted); margin:8px 0 20px; }
.brand .features{ list-style:none; padding:0; margin:0; display:flex; gap:10px; flex-wrap:wrap; }
.brand .features li{ padding:6px 10px; border:1px solid rgba(255,255,255,.08); backdrop-filter: blur(6px);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02)); border-radius:10px; color:var(--muted); font-size:.9rem; }

/* Hex animated mark */
.hex{ width:42px; height:48px; position:relative; filter: drop-shadow(0 0 14px rgba(106,226,255,.35)); }
.hex span{ position:absolute; inset:0; border:2px solid var(--accent); border-radius:10px; transform: rotate(30deg) skewY(20deg); }
.hex span:nth-child(2){ transform: rotate(30deg) skewY(20deg) translate(6px,-6px); opacity:.75; border-color: var(--accent-2); }
.hex span:nth-child(3){ transform: rotate(30deg) skewY(20deg) translate(12px,-12px); opacity:.45; }

.card{
  background: linear-gradient(180deg, rgba(18, 24, 38, .7), rgba(18, 24, 38, .5));
  border:1px solid rgba(255,255,255,.08);
  box-shadow: var(--shadow), 0 0 0 1px rgba(106,226,255,.08) inset, 0 30px 80px -40px rgba(106,226,255,.35);
  backdrop-filter: blur(14px) saturate(120%);
  border-radius: 18px; padding: clamp(22px, 3.5vw, 34px);
  width:100%; max-width: min(720px, 92vw);
}

.tabs{ position:relative; display:flex; background: rgba(255,255,255,.02); border:1px solid rgba(255,255,255,.08);
  border-radius: 12px; padding:6px; gap:4px; }
.tab{ flex:1; position:relative; z-index:1; appearance:none; background:transparent; color:var(--muted); border:0; padding:12px 14px; border-radius:10px; font-weight:600; letter-spacing:.3px; cursor:pointer; }
.tab.active{ color:var(--txt); }
.tab-indicator{ position:absolute; inset:4px; width:calc(50% - 8px); background: linear-gradient(135deg, rgba(106,226,255,.25), rgba(166,107,255,.25)); border:1px solid rgba(255,255,255,.12);
  border-radius: 10px; box-shadow: inset 0 0 0 1px rgba(255,255,255,.06), 0 10px 20px -10px rgba(166,107,255,.45);
  transform: translateX(0); transition: transform .35s cubic-bezier(.2,.7,.2,1);
}
.tabs[data-active="register"] .tab-indicator{ transform: translateX(100%); }

.panels{ padding: 18px 4px 6px; }
.panel{ display:grid; gap:14px; }
.panel[hidden]{ display:none; }

.two-col{ display:grid; grid-template-columns: 1fr 1fr; gap:14px; }
@media (max-width: 600px){ .two-col{ grid-template-columns: 1fr; } }

.field{ display:grid; gap:8px; }
.field label{ color: var(--muted); font-size:.95rem; }
.field input{ width:100%; padding:16px 18px; border-radius:14px; border:1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01)); color: var(--txt);
  outline:none; transition: border-color .2s, box-shadow .2s, transform .12s; font-size:1.02rem;
}
.field input:focus{ border-color: rgba(106,226,255,.7); box-shadow: 0 0 0 4px rgba(106,226,255,.18), 0 0 0 8px rgba(166,107,255,.1); transform: translateY(-1px); }
.field .hint{ color: var(--muted); font-size:.85rem; }
.field .error{ color: var(--danger); min-height: 1em; font-size:.85rem; }

.password{ position:relative; }
.eye{ position:absolute; right:8px; top:50%; transform:translateY(-50%);
  width:36px; height:36px; border-radius:10px; border:1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.01)); cursor:pointer;
}
.eye::before{ content:""; position:absolute; inset:0; margin:auto; width:16px; height:16px; border-radius:100%;
  box-shadow: inset 0 -8px 0 -6px var(--txt), 0 0 0 2px rgba(255,255,255,.25);
}
.eye[data-visible="true"]::after{ content:""; position:absolute; left:9px; top:16px; width:18px; height:2px; background:var(--danger); transform: rotate(35deg); }

.row{ display:flex; align-items:center; gap:12px; }
.row.between{ justify-content:space-between; }
.checkbox{ display:flex; align-items:center; gap:10px; color:var(--muted); cursor:pointer; }
.checkbox input{ accent-color: var(--accent); width:16px; height:16px; }
.link{ color: var(--accent); text-decoration:none; }

.cta{ margin-top:8px; padding:16px 18px; width:100%; border-radius:14px; border:1px solid rgba(255,255,255,.14);
  background: radial-gradient(120% 120% at 0% 0%, rgba(106,226,255,.35), rgba(166,107,255,.3)); color:#081019; font-weight:700; letter-spacing:.4px;
  cursor:pointer; box-shadow: 0 10px 24px -12px rgba(106,226,255,.6), inset 0 0 0 1px rgba(255,255,255,.2);
}
.cta:hover{ filter: brightness(1.05); }
.cta:active{ transform: translateY(1px); }

.meta{ margin-top: 14px; display:flex; justify-content:center; }
.chip{ display:inline-flex; align-items:center; gap:8px; font-size:.85rem; color:var(--muted);
  border:1px dashed rgba(255,255,255,.14); border-radius:999px; padding:6px 10px; }
.chip::before{ content:""; width:6px; height:6px; border-radius:999px; background: linear-gradient(180deg, var(--accent), var(--accent-2)); box-shadow: 0 0 12px rgba(106,226,255,.6); }

/* Responsiveness */
@media (max-width: 980px){
  .auth{ grid-template-columns: 1fr; align-items: start; padding-top: 42px; overflow:auto; }
  body{ overflow:auto; }
  .brand{ order:2; text-align:center; }
}