:root {
  --bg: #0c1117;
  --bg-elevated: #141b24;
  --border: #243044;
  --text: #e8eef5;
  --muted: #8b9cb3;
  --accent: #3d8bfd;
  --accent-hover: #5a9dff;
  --success: #3ddc97;
  --danger: #ff6b6b;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 20% -10%, #1a2840 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 440px;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3rem) 1.25rem;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1.5rem, 4vw, 2rem);
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.sub {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.92rem;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.45rem;
}

input[type="password"] {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input[type="password"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(61, 139, 253, 0.22);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 1rem;
  padding: 0.78rem 1rem;
  border: none;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  background: linear-gradient(165deg, var(--accent), #2563d4);
  color: #fff;
  transition: transform 0.12s, filter 0.12s;
}

.btn:hover {
  filter: brightness(1.06);
}

.btn:active {
  transform: translateY(1px);
}

.alert {
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.alert-error {
  background: rgba(255, 107, 107, 0.12);
  border: 1px solid rgba(255, 107, 107, 0.35);
  color: #ffb4b4;
}

.alert-success {
  background: rgba(61, 220, 151, 0.1);
  border: 1px solid rgba(61, 220, 151, 0.35);
  color: #b8f5d9;
}

.alert-info {
  background: rgba(61, 139, 253, 0.1);
  border: 1px solid rgba(61, 139, 253, 0.35);
  color: #c5dcff;
}

.alert-info p {
  margin: 0 0 0.5rem;
}

.alert-info p:last-child {
  margin-bottom: 0;
}

.sync-countdown strong {
  font-variant-numeric: tabular-nums;
}

.ip-box {
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 1.05rem;
  padding: 0.85rem 1rem;
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: 10px;
  word-break: break-all;
  color: var(--success);
  margin: 0.75rem 0 1rem;
}

.meta {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 1.25rem;
}

a.link {
  color: var(--accent-hover);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
}

a.link:hover {
  text-decoration: underline;
}

.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  background: rgba(61, 139, 253, 0.15);
  color: var(--accent-hover);
  margin-bottom: 0.75rem;
}

footer {
  text-align: center;
  margin-top: 2rem;
  font-size: 0.78rem;
  color: var(--muted);
}