:root {
  --primary: #0066A1;
  --primary-dark: #004B73;
  --primary-light: #E6F3F8;
  --primary-50: #F0F9FC;
  --accent: #00D4FF;
  --accent-dark: #00B8E6;
  --primary-glow: rgba(0, 102, 161, 0.35);
  
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;

  --white: #FFFFFF;
  --danger: #EF4444;
  --danger-glow: rgba(239, 68, 68, 0.3);
  --success: #10B981;

  --radius: 12px;
  --radius-xl: 24px;
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #001B2E 0%, #003D5C 30%, #0066A1 70%, #0088CC 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  /* Removed: overflow hidden, position relative, animation */
}

.login-container {
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
}

.login-card {
  background: #FFFFFF;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 48px 40px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  /* Removed: backdrop-filter (GPU intensive) */
}

.login-logo {
  margin-bottom: 28px;
}

.login-logo img {
  width: 100px;
}

.login-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 36px;
  letter-spacing: -0.02em;
}

.login-form {
  text-align: left;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--gray-700);
  font-size: 14px;
}

.form-label .required {
  color: var(--danger);
  margin-left: 2px;
}

.input-wrapper {
  position: relative;
}

.input-field {
  width: 100%;
  height: 50px;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  color: var(--gray-800);
  padding: 0 18px 0 52px;
  font-size: 15px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  font-family: 'Inter', sans-serif;
}

.input-field:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--white);
}

.input-field::placeholder {
  color: var(--gray-400);
}

.input-icon {
  position: absolute;
  left: 0;
  top: 0;
  width: 50px;
  height: 50px;
  background: var(--primary-50);
  border-right: 1.5px solid var(--gray-200);
  border-radius: var(--radius) 0 0 var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 20px;
  transition: background 0.2s ease, color 0.2s ease;
}

.input-field:focus + .input-icon {
  background: var(--primary);
  color: var(--white);
}

.input-field.input-error {
  border-color: var(--danger);
  background: #FEF2F2;
}

.input-field.input-error:focus {
  box-shadow: 0 0 0 3px var(--danger-glow);
}

.input-field.input-error + .input-icon {
  background: #FEE2E2;
  border-color: var(--danger);
  color: var(--danger);
}

.field-error {
  display: block;
  font-size: 12px;
  color: var(--danger);
  margin-top: 8px;
  min-height: 18px;
  font-weight: 500;
}

.btn-login {
  width: 100%;
  height: 50px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-dark) 100%);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
  box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--primary-glow);
}

.btn-login:active {
  transform: scale(0.98);
}

.btn-login i {
  font-size: 22px;
}

.login-footer {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.login-footer .company-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

.login-footer .brand {
  font-size: 11px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.user-type-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 4px;
}

.user-type-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--gray-500);
  font-size: 14px;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: all 0.2s ease;
}

.user-type-btn i {
  font-size: 18px;
}

.user-type-btn:hover {
  color: var(--gray-700);
  background: var(--gray-200);
}

.user-type-btn.active {
  background: var(--white);
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.login-error {
  display: none;
  padding: 14px 18px;
  background: #FEE2E2;
  color: #991B1B;
  border: 1px solid #FCA5A5;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
  text-align: left;
}

.login-error i {
  margin-right: 10px;
  font-size: 18px;
}

@media (max-width: 480px) {
  .login-card {
    padding: 36px 24px;
  }

  .login-logo img {
    width: 80px;
  }

  .login-title {
    font-size: 22px;
  }

  .btn-login {
    height: 48px;
    font-size: 15px;
  }
}