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

:root {
  --iberia-red: #A8151C;
  --iberia-red-dark: #8B1116;
  --iberia-red-light: #C11623;
  --text-primary: #1a1a1a;
  --text-secondary: #6b7280;
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --border-color: #e5e7eb;
  --success-color: #10b981;
  --error-color: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.login-container {
  width: 100%;
  max-width: 440px;
  position: relative;
  z-index: 10;
}

.login-box {
  background: var(--bg-primary);
  border-radius: 20px;
  box-shadow: var(--shadow-xl), 0 0 0 1px rgba(0, 0, 0, 0.05);
  padding: 48px 40px;
  position: relative;
  backdrop-filter: blur(10px);
  animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.logo-section {
  text-align: center;
  margin-bottom: 40px;
}

.logo-circle {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--iberia-red) 0%, var(--iberia-red-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: white;
  box-shadow: 0 8px 24px rgba(168, 21, 28, 0.3);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.logo-section h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--iberia-red) 0%, var(--iberia-red-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 400;
}

.login-form {
  margin-top: 32px;
}

.alert {
  padding: 12px 16px;
  border-radius: 12px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.alert-error {
  background: #fef2f2;
  color: var(--error-color);
  border: 1px solid #fecaca;
}

.alert svg {
  flex-shrink: 0;
}

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

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

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper svg {
  position: absolute;
  left: 16px;
  color: var(--text-secondary);
  pointer-events: none;
}

.input-wrapper input {
  width: 100%;
  padding: 14px 16px 14px 48px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  font-size: 15px;
  color: var(--text-primary);
  background: var(--bg-secondary);
  transition: all 0.3s ease;
  outline: none;
}

.input-wrapper input:focus {
  border-color: var(--iberia-red);
  background: var(--bg-primary);
  box-shadow: 0 0 0 4px rgba(168, 21, 28, 0.1);
}

.input-wrapper input::placeholder {
  color: #9ca3af;
}

.toggle-password {
  position: absolute;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
  z-index: 10;
  height: 28px;
  width: 28px;
  border-radius: 4px;
}

.toggle-password:hover {
  color: var(--iberia-red);
  background: rgba(168, 21, 28, 0.1);
}

.toggle-password:active {
  transform: scale(0.95);
}

.form-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  accent-color: var(--iberia-red);
}

.btn-login {
  width: 100%;
  padding: 14px 24px;
  background: linear-gradient(135deg, var(--iberia-red) 0%, var(--iberia-red-light) 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(168, 21, 28, 0.3);
  position: relative;
  overflow: hidden;
}

.btn-login::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.btn-login:hover::before {
  left: 100%;
}

.btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(168, 21, 28, 0.4);
}

.btn-login:active {
  transform: translateY(0);
}

.btn-login:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.loader {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.login-footer {
  margin-top: 32px;
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.login-footer p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.version {
  font-size: 12px;
  color: #9ca3af;
}

/* Background Pattern */
.background-pattern {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.pattern-circle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 21, 28, 0.1) 0%, transparent 70%);
  animation: float 20s ease-in-out infinite;
}

.circle-1 {
  width: 400px;
  height: 400px;
  top: -100px;
  left: -100px;
  animation-delay: 0s;
}

.circle-2 {
  width: 600px;
  height: 600px;
  bottom: -200px;
  right: -200px;
  animation-delay: 7s;
}

.circle-3 {
  width: 300px;
  height: 300px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: 14s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(50px, -50px) scale(1.1);
  }
  66% {
    transform: translate(-50px, 50px) scale(0.9);
  }
}

/* Responsive */
@media (max-width: 480px) {
  .login-box {
    padding: 32px 24px;
  }

  .logo-section h1 {
    font-size: 28px;
  }

  .logo-circle {
    width: 70px;
    height: 70px;
  }
}