:root {
  --bg-a: #0b1f2a;
  --bg-b: #163647;
  --card: #f7fbff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #0ea5a4;
  --accent-dark: #0b7d7c;
  --danger: #b91c1c;
  --success: #047857;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #20506c 0%, var(--bg-a) 45%, #071319 100%);
}

.container {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.card {
  width: min(460px, 100%);
  background: linear-gradient(160deg, #ffffff, var(--card));
  border-radius: 18px;
  padding: 2rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.eyebrow {
  margin: 0;
  color: var(--accent-dark);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

h1 {
  margin: 0.4rem 0 0.8rem;
  font-size: 2rem;
}

.subtext {
  margin: 0;
  color: var(--muted);
}

.form {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

label {
  font-size: 0.92rem;
  font-weight: 600;
}

input {
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  padding: 0.8rem;
  font-size: 1rem;
}

input:focus {
  outline: 2px solid #8ce7e6;
  border-color: var(--accent);
}

button {
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 0.9rem;
  cursor: pointer;
  transition: background 0.2s ease;
}

button:hover {
  background: var(--accent-dark);
}

.message {
  min-height: 1.5rem;
  margin: 0.9rem 0 0;
  font-size: 0.94rem;
}

.message.error {
  color: var(--danger);
}

.message.success {
  color: var(--success);
}

.dashboard {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #e2e8f0;
}

.hint {
  margin-top: 1.2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.hidden {
  display: none;
}