:root {
  --bg: #0f1222;
  --bg-2: #121632;
  --card: rgba(255,255,255,0.06);
  --card-2: rgba(255,255,255,0.08);
  --glass: rgba(255,255,255,0.1);
  --text: #e9ecf8;
  --muted: #a8b0d3;
  --accent: #7c3aed;
  --accent-2: #22d3ee;
  --danger: #ff6b6b;
  --success: #34d399;
}

* { box-sizing: border-box; }
html, body, #app { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% -10%, #1a1f46 0%, transparent 60%),
              radial-gradient(800px 600px at 110% 10%, #27134a 0%, transparent 50%),
              linear-gradient(160deg, var(--bg), var(--bg-2));
}

[hidden] { display: none !important; }

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 32px 20px 40px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 22px; filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3)); }
.title { font-weight: 800; letter-spacing: 0.3px; }

main { display: grid; gap: 18px; margin-bottom: 24px; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 18px;
}
@media (max-width: 780px) {
  .grid { grid-template-columns: 1fr; }
}

.card {
  border-radius: 16px;
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 10px 30px rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.05);
}

.login { padding: 28px; text-align: center; }
.login h1 { margin: 4px 0 8px; font-size: 20px; }
.login p { margin: 0 0 18px; color: var(--muted); }
.login form { display: flex; gap: 10px; justify-content: center; }
.login input {
  width: min(420px, 80vw);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 10px;
  outline: none;
}

button.primary {
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  border: none;
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(124,58,237,0.4);
}
button.primary:hover { filter: brightness(1.07); }
button.primary:active { filter: brightness(0.96); }

button.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
}
button.ghost:hover { color: var(--text); border-color: rgba(255,255,255,0.28); }

.error { margin-top: 10px; color: var(--danger); font-weight: 600; }

.otp { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.otp-header { display: flex; align-items: center; justify-content: space-between; }
.badge {
  font-weight: 700;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
}
.timer { display: flex; align-items: center; gap: 10px; }
.ring {
  width: 34px; height: 34px; border-radius: 50%; position: relative; overflow: hidden;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
}
.ring .fill {
  --p: 0;
  position: absolute; inset: 0;
  background: conic-gradient(var(--accent) calc(var(--p) * 1%), transparent 0);
  mask: radial-gradient(circle 14px at 50% 50%, transparent 60%, black 61%);
}
.seconds { min-width: 24px; text-align: right; color: var(--muted); font-weight: 700; }

.otp-code { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.digits {
  font-size: clamp(28px, 6vw, 46px);
  font-weight: 800;
  letter-spacing: 3px;
  text-shadow: 0 4px 18px rgba(124,58,237,0.35);
}
button.copy {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
}
button.copy:hover { filter: brightness(1.1); }

.foot { text-align: center; margin-top: 16px; font-size: 12px; }
.muted { color: var(--muted); }

/* Guide */
.guide { padding: 20px; }
.guide h2 { margin: 0 0 8px; font-size: 18px; }
.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 12px;
}
@media (max-width: 780px) {
  .guide-grid { grid-template-columns: 1fr; }
}
.guide img {
  width: 100%; height: auto; display: block;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}