:root {
  --bg-0: #04101a;
  --bg-1: #0b2d44;
  --bg-2: #1a4f6e;
  --surface: rgba(8, 23, 36, 0.78);
  --surface-border: rgba(164, 210, 236, 0.24);
  --text: #e8f5ff;
  --muted: #a4c1d4;
  --primary: #30b6f7;
  --primary-ink: #042032;
  --font: "Source Sans 3", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: radial-gradient(circle at 20% 12%, var(--bg-2), var(--bg-0) 42%), linear-gradient(140deg, var(--bg-1), var(--bg-0));
}

.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.25rem;
}

.card {
  width: min(560px, 100%);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 20px;
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.32);
  padding: 1.4rem;
}

.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}

h1 {
  margin: 0.35rem 0 0.7rem;
  font-size: 1.8rem;
}

.muted {
  color: var(--muted);
}

.stack {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
}

.field {
  display: grid;
  gap: 0.4rem;
  font-size: 0.9rem;
}

input {
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border-radius: 12px;
  padding: 0.72rem 0.8rem;
  font: inherit;
}

.btn {
  border: none;
  border-radius: 12px;
  cursor: pointer;
  padding: 0.75rem 1rem;
  text-decoration: none;
  display: inline-flex;
  justify-content: center;
  font-weight: 700;
  background: var(--primary);
  color: var(--primary-ink);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border: 1px solid var(--surface-border);
}