* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(145deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  color: #e2e8f0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.card {
  width: 100%;
  max-width: 520px;
  background: rgba(30, 41, 59, 0.95);
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 1.75rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
}

.muted {
  color: #94a3b8;
  font-size: 0.9rem;
  margin: 0 0 1.25rem;
}

.hint {
  color: #64748b;
  font-size: 0.8rem;
  margin: 0.35rem 0 1rem;
}

label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
}

textarea,
input[type="password"],
input[type="tel"],
input[type="text"] {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #475569;
  border-radius: 8px;
  background: #0f172a;
  color: #f1f5f9;
  font-size: 0.95rem;
  font-family: inherit;
}

textarea:focus,
input:focus,
input[type="tel"]:focus,
input[type="text"]:focus {
  outline: none;
  border-color: #38bdf8;
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.25);
}

button {
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 8px;
  background: #0ea5e9;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  background: #0284c7;
}

.button-link {
  display: block;
  text-align: center;
  margin-bottom: 1.25rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: #22c55e;
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}

.button-link:hover {
  background: #16a34a;
}

.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin: 0 0 1rem;
  font-size: 0.9rem;
}

.alert.error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid #ef4444;
  color: #fecaca;
}

.alert.success {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid #22c55e;
  color: #bbf7d0;
}

code {
  background: #0f172a;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
}

.nav-links a {
  color: #38bdf8;
}

.nav-links a:hover {
  text-decoration: underline;
}