* {
  box-sizing: border-box;
  font-family: "Segoe UI", system-ui, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a, #020617);
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-container {
  width: 100%;
  padding: 20px;
}

.login-card {
  max-width: 420px;
  margin: auto;
  background: #ffffff;
  border-radius: 14px;
  padding: 40px 30px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
  text-align: center;
}

.logo {
  width: 120px;
  margin-bottom: 20px;
}

h1 {
  margin: 0;
  color: #0f172a;
}

.subtitle {
  color: #64748b;
  margin-bottom: 30px;
  font-size: 14px;
}

form input {
  width: 100%;
  padding: 14px;
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid #cbd5f5;
  font-size: 15px;
}

form input:focus {
  outline: none;
  border-color: #2563eb;
}

form button {
  width: 100%;
  padding: 14px;
  background: #0f172a;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s ease;
}

form button:hover {
  background: #020617;
}

.error {
  margin-top: 15px;
  color: #dc2626;
  font-size: 14px;
}