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

:root {
  --primary-color: #4F46E5;
  --primary-dark: #4338CA;
  --secondary-color: #6366F1;
  --text-color: #1F2937;
  --text-light: #6B7280;
  --bg-color: #F9FAFB;
  --white: #FFFFFF;
  --error-color: #EF4444;
  --success-color: #10B981;
  --border-color: #E5E7EB;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: var(--text-color);
}

.container {
  background: var(--white);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  width: 100%;
  max-width: 420px;
  padding: 40px 30px;
  animation: slideUp 0.5s ease-out;
}

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

.logo-container {
  text-align: center;
  margin-bottom: 30px;
}

.logo {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 20px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--white);
  font-weight: bold;
}

h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 10px;
  text-align: center;
}

.subtitle {
  color: var(--text-light);
  text-align: center;
  margin-bottom: 30px;
  font-size: 14px;
}

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-color);
  font-weight: 500;
  font-size: 14px;
}

input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  font-size: 16px;
  transition: all 0.3s ease;
  background: var(--white);
  color: var(--text-color);
}

input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 10px;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(79, 70, 229, 0.3);
}

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.error-message {
  background: #FEE2E2;
  color: var(--error-color);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  display: none;
}

.error-message.show {
  display: block;
  animation: shake 0.5s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  75% { transform: translateX(10px); }
}

.loading {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--white);
  animation: spin 0.8s linear infinite;
  margin-right: 8px;
}

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

/* Dashboard Styles */
.dashboard-container {
  text-align: center;
  padding: 20px;
}

.greeting {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-color);
  margin: 40px 0 20px;
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.user-name {
  color: var(--primary-color);
  display: block;
  margin-top: 10px;
}

.user-info {
  background: var(--bg-color);
  border-radius: 12px;
  padding: 20px;
  margin: 30px 0;
  text-align: left;
}

.info-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
  border-bottom: none;
}

.info-label {
  color: var(--text-light);
  font-size: 14px;
}

.info-value {
  color: var(--text-color);
  font-weight: 500;
}

.logout-btn {
  margin-top: 30px;
  background: #EF4444;
}

.logout-btn:hover {
  box-shadow: 0 10px 20px rgba(239, 68, 68, 0.3);
}

/* Responsive */
@media (max-width: 480px) {
  .container {
    padding: 30px 20px;
    border-radius: 16px;
  }

  h1 {
    font-size: 24px;
  }

  .greeting {
    font-size: 28px;
  }
}