:root {
  --bg: #0b1020;
  --card: #141a2e;
  --text: #e8ebf5;
  --muted: #99a0b8;
  --accent: #4f46e5;
  --accent-hover: #6366f1;
  --border: #28304d;
  --error: #f87171;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1b2244 0, transparent 60%), var(--bg);
  background-color: var(--bg);
  color: var(--text);
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 1.4rem;
  margin: 0 0 0.4rem;
}

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

form {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--muted);
}

input {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: #0e1426;
  color: var(--text);
  font-size: 1rem;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.25);
}

button,
.button-link {
  display: inline-block;
  text-align: center;
  text-decoration: none;
  margin-top: 0.4rem;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover,
.button-link:hover {
  background: var(--accent-hover);
}

.error {
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.4);
  color: var(--error);
  padding: 0.6rem 0.8rem;
  border-radius: 9px;
  font-size: 0.88rem;
  margin: 0 0 1rem;
}

.footer {
  margin: 1.5rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}