:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #4b5563;
  --accent: #0b6bcb;
  --danger: #b42318;
  --border: #d0d7e2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, #eaf2ff 0, #eaf2ff 20%, transparent 21%),
    radial-gradient(circle at 90% 80%, #e9f8f0 0, #e9f8f0 16%, transparent 17%),
    var(--bg);
  display: grid;
  place-items: center;
  padding: 16px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(16, 24, 40, 0.08);
  padding: 24px;
}

h1 {
  margin-top: 0;
  margin-bottom: 6px;
  font-size: 1.4rem;
}

p {
  margin-top: 0;
  color: var(--muted);
}

label {
  display: block;
  margin-top: 14px;
  margin-bottom: 6px;
  font-size: 0.95rem;
  font-weight: 600;
}

input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
}

button {
  margin-top: 16px;
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--accent);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  filter: brightness(0.96);
}

.alert {
  margin-top: 12px;
  padding: 10px;
  border: 1px solid #fecaca;
  border-radius: 10px;
  background: #fef2f2;
  color: var(--danger);
}

.home {
  text-align: center;
}

.home h1 {
  margin-bottom: 8px;
}

.logout {
  margin-top: 16px;
  background: #374151;
}