:root {
  color-scheme: dark;
  --background: #04060b;
  --panel: rgba(12, 17, 29, 0.92);
  --line: rgba(255, 255, 255, 0.11);
  --text: #f1f5ff;
  --muted: #8f9bb4;
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --danger: #fb7185;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 50% 35%, rgba(139, 92, 246, 0.18), transparent 36%),
    radial-gradient(circle at 75% 80%, rgba(34, 211, 238, 0.1), transparent 35%),
    var(--background);
}

.gateway-shell {
  min-height: 100vh;
  padding: 24px;
  display: grid;
  place-items: center;
}

.gateway-card {
  width: min(460px, 100%);
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(20px);
}

.gateway-mark {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  color: #04060b;
  font-size: 22px;
  font-weight: 950;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
}

.eyebrow {
  margin: 24px 0 7px;
  color: var(--accent-2);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.19em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(30px, 8vw, 44px);
  letter-spacing: -0.045em;
}

.subtitle {
  margin: 10px 0 25px;
  color: var(--muted);
}

form,
label {
  display: grid;
}

form {
  gap: 15px;
}

label {
  gap: 7px;
}

label span {
  color: var(--muted);
  font-size: 12px;
}

input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  outline: 0;
  color: var(--text);
  background: rgba(255, 255, 255, 0.035);
}

input:focus {
  border-color: rgba(139, 92, 246, 0.75);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.12);
}

button {
  min-height: 48px;
  margin-top: 5px;
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  color: #041018;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

button:disabled {
  opacity: 0.6;
  cursor: wait;
}

.message {
  min-height: 20px;
  color: var(--danger);
  font-size: 13px;
  text-align: center;
}

.message.success {
  color: #34d399;
}

.back-link {
  display: block;
  margin-top: 17px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  text-decoration: none;
}