/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* CSS Custom Properties for consistent theming */
:root {
  /* Colors - Scandinavian inspired palette */
  --color-primary: #667eea;
  --color-primary-dark: #5a67d8;
  --color-secondary: #764ba2;
  --color-accent: #f093fb;

  /* Neutral colors */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* Base styles */
body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-700);
  background: linear-gradient(
    135deg,
    var(--color-gray-100) 0%,
    var(--color-white) 50%,
    #e0e7ff 100%
  );
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-size: 200% 200%;
  animation: background-pan 15s ease-in-out infinite;
}

@keyframes background-pan {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  padding: var(--spacing-16) 0 var(--spacing-12);
  text-align: center;
}

.header-content {
  max-width: 600px;
  margin: 0 auto;
}

.title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-secondary) 100%
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.025em;
  text-shadow: 0 2px 20px rgba(102, 126, 234, 0.1);
}

.subtitle {
  max-width: 720px;
  margin: 0 auto;
  color: var(--color-gray-600);
  font-weight: 400;
  line-height: 1.5;
}

.subtitle p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-6);
  text-align: left;
}

.subtitle ul {
  list-style-type: none;
  padding: 0;
  text-align: left;
}

.subtitle li {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  background: rgba(255, 255, 255, 0.45);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--spacing-4);
  margin-bottom: var(--spacing-3);
  transition: all var(--transition-slow);
  font-size: var(--font-size-base);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

.subtitle li:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 32px 0 rgba(102, 126, 234, 0.2);
  border-color: rgba(255, 255, 255, 0.8);
  background: rgba(255, 255, 255, 0.7);
}

.subtitle li strong {
  color: var(--color-gray-800);
  font-weight: 600;
}

.subtitle .li-icon {
  flex-shrink: 0;
  color: var(--color-primary);
  background: rgba(255, 255, 255, 0.5);
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Main content */
.main-content {
  flex: 1;
  padding-bottom: var(--spacing-16);
}

.test-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
  gap: var(--spacing-8);
  margin-top: var(--spacing-8);
}

/* Test cards */
.test-card {
  background: rgba(255, 255, 255, 0.45);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-xl);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: all var(--transition-slow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.test-card:hover {
  box-shadow: 0 8px 32px 0 rgba(102, 126, 234, 0.2);
  border-color: rgba(255, 255, 255, 0.8);
}

.card-header {
  padding: var(--spacing-8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
}

.card-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-2);
  letter-spacing: -0.025em;
}

.card-description {
  color: var(--color-gray-700);
  font-size: var(--font-size-base);
  line-height: 1.5;
}

.card-content {
  padding: var(--spacing-6);
}

/* Iframe styling */
.test-iframe {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  transition: border-color var(--transition-fast);
}

.test-iframe:hover {
  border-color: rgba(255, 255, 255, 0.8);
}

/* Sign-Up Form Styles */
.signup-form {
  max-width: 100%;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--spacing-6);
}

.form-group label {
  display: block;
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-2);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
  background: rgba(255, 255, 255, 0.5);
  font-family: inherit;
  color: var(--color-gray-800);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  background: rgba(255, 255, 255, 0.8);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.form-group input.error,
.form-group textarea.error,
.form-group select.error {
  border-color: #ef4444;
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.error-message {
  color: #ef4444;
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-1);
  min-height: 1.25rem;
}

.validation-status {
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-1);
  min-height: 1.25rem;
}

/* Password Strength Indicator */
.password-strength {
  margin-top: var(--spacing-2);
}

.strength-bar {
  height: 4px;
  background: var(--color-gray-200);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: var(--spacing-1);
}

.strength-bar::after {
  content: '';
  display: block;
  height: 100%;
  transition: all var(--transition-normal);
  border-radius: 2px;
}

.strength-bar.weak::after {
  width: 33%;
  background: #ef4444;
}

.strength-bar.medium::after {
  width: 66%;
  background: #f59e0b;
}

.strength-bar.strong::after {
  width: 100%;
  background: #10b981;
}

.strength-text {
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* Custom Checkbox Styles */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  cursor: pointer;
  font-weight: 400;
  line-height: 1.5;
}

.checkbox-label input[type='checkbox'] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkbox-label .custom-checkbox {
  position: relative;
  display: inline-block;
  width: 24px;
  height: 24px;
  background: rgba(255, 255, 255, 0.5);
  border: 2px solid rgba(102, 126, 234, 0.3);
  border-radius: var(--radius-sm);
  bottom: -5px;
  margin-right: 10px;
  transition: all var(--transition-fast);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  flex-shrink: 0;
}

.checkbox-label:hover .custom-checkbox {
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.7);
  transform: scale(1.05);
}

.checkbox-label input[type='checkbox']:checked + .custom-checkbox {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.checkbox-label input[type='checkbox']:checked + .custom-checkbox::after {
  content: '';
  position: absolute;
  left: 7px;
  top: 3px;
  width: 8px;
  height: 12px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.checkbox-label input[type='checkbox']:focus + .custom-checkbox {
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

/* Terms Link */
.terms-link {
  color: var(--color-primary);
  text-decoration: none;
}

.terms-link:hover {
  text-decoration: underline;
}

.submit-btn {
  width: 100%;
  padding: var(--spacing-4) var(--spacing-6);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-slow);
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.8) 0%,
    rgba(90, 103, 216, 0.8) 100%
  );
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.submit-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 1) 0%,
    rgba(90, 103, 216, 1) 100%
  );
}

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

.retry-btn,
.reset-btn {
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  min-width: 120px;
}

.retry-btn {
  background: var(--color-primary);
  color: var(--color-white);
}

.reset-btn {
  background: var(--color-gray-600);
  color: var(--color-white);
}

.form-actions {
  display: flex;
  gap: var(--spacing-4);
  justify-content: center;
  margin-top: var(--spacing-6);
}

/* Success/Error States */
.success-state,
.error-state {
  text-align: center;
  padding: var(--spacing-8);
  display: none;
}

.success-icon,
.error-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-4);
}

.success-state h3,
.error-state h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.success-state p,
.error-state p {
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-6);
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid var(--color-white);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Animations */
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Footer */
.footer {
  padding: var(--spacing-8) 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-gray-600);
  font-size: var(--font-size-sm);
}

/* Popup modal styles */
.popup-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(25, 33, 49, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn var(--transition-normal) ease-out;
}

.popup-content {
  background: rgba(255, 255, 255, 0.95);
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  max-width: 400px;
  width: 90%;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.3);
  animation: slideUp var(--transition-normal) ease-out;
}

.popup-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-4);
  display: block;
}

.popup-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
  letter-spacing: -0.025em;
}

.popup-content p {
  font-size: var(--font-size-base);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-6);
  line-height: 1.5;
}

.close-btn {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
  color: var(--color-white);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.close-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

/* Popup button styles */
.wizard-btn {
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-slow);
  border: 1px solid rgba(193, 200, 217, 0.5);
  background: rgba(255, 255, 255, 0.5);
  color: var(--color-gray-800);
  margin: 0 var(--spacing-2);
  min-width: 120px;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.wizard-btn:hover {
  background: rgba(255, 255, 255, 0.8);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.wizard-btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.wizard-btn.next-btn {
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.8) 0%,
    rgba(90, 103, 216, 0.8) 100%
  );
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.wizard-btn.next-btn:hover {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
  box-shadow: var(--shadow-lg);
}

/* Button styles for iframe page */
.submit {
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-dark) 100%
  );
  color: var(--color-white);
  border: none;
  padding: var(--spacing-4) var(--spacing-8);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-family);
}

.submit:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

/* Responsive design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-3);
  }

  .header {
    padding: var(--spacing-12) 0 var(--spacing-8);
  }

  .title {
    font-size: var(--font-size-4xl);
  }

  .subtitle {
    font-size: var(--font-size-lg);
  }

  .test-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }

  .card-header {
    padding: var(--spacing-6);
  }

  .card-content {
    padding: var(--spacing-4);
  }

  .popup-content {
    padding: var(--spacing-6);
    margin: var(--spacing-4);
  }
}

@media (max-width: 480px) {
  .title {
    font-size: var(--font-size-3xl);
  }

  .card-title {
    font-size: var(--font-size-xl);
  }

  .popup-content p {
    font-size: var(--font-size-base);
  }
}