* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-container { width: 100%; max-width: 420px; }

.login-box {
  background: white;
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 25px 50px rgba(0,0,0,0.4);
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.login-header { text-align: center; margin-bottom: 30px; }
.logo { font-size: 50px; margin-bottom: 12px; }
.login-header h1 { font-size: 22px; color: #1a1a2e; font-weight: 700; }
.login-header p  { color: #888; font-size: 14px; margin-top: 6px; }

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: #444;
  margin-bottom: 6px;
}
.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid #e8e8e8;
  border-radius: 8px;
  font-size: 14px;
  transition: border 0.2s;
  outline: none;
}
.form-group input:focus { border-color: #0f3460; }

.form-options {
  margin-bottom: 22px;
  font-size: 13px;
  color: #666;
}
.remember-me { display: flex; align-items: center; gap: 8px; cursor: pointer; }

.btn-login {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, #0f3460, #533483);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}
.btn-login:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(15,52,96,0.35); }
.btn-login:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }

.alert {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 13px;
  text-align: center;
}
.alert.success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert.error   { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.alert.info    { background: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }

.login-footer { margin-top: 25px; text-align: center; font-size: 11px; color: #bbb; }

@media (max-width: 480px) {
  .login-box { padding: 28px 22px; }
}