:root {
  --bg0: #0b1220;
  --bg1: #121c2e;
  --text: #eef3fa;
  --muted: #8fa3bf;
  --accent: #2f6fed;
  --danger: #ef4444;
  --border: #2a3a55;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 500px at 10% -10%, #1a3a6e 0%, transparent 55%),
    radial-gradient(800px 400px at 100% 0%, #16324f 0%, transparent 50%),
    var(--bg0);
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.panel {
  width: min(100%, 400px);
  background: color-mix(in srgb, var(--bg1) 92%, transparent);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(8px);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: var(--muted);
}

h1 {
  margin: 0.4rem 0 0;
  font-size: 1.75rem;
}

.sub {
  margin: 0.35rem 0 1.5rem;
  color: var(--muted);
}

label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

input {
  display: block;
  width: 100%;
  margin-top: 0.4rem;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg0);
  color: var(--text);
  font-size: 1rem;
}

input:focus {
  outline: 2px solid color-mix(in srgb, var(--accent) 60%, transparent);
  border-color: var(--accent);
}

button {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.8rem 1rem;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
}

button:disabled {
  opacity: 0.7;
  cursor: wait;
}

.error {
  color: var(--danger);
  font-size: 0.9rem;
  margin: 0 0 0.75rem;
}