:root {
  --color-primary: #1DA1F2;
  --color-primary-dark: #0C85D0;
  --color-secondary: #657786;
  --color-text: #14171A;
  --color-text-secondary: #657786;
  --color-background: #FFFFFF;
  --color-background-secondary: #F5F8FA;
  --color-border: #E1E8ED;
  --color-error: #E0245E;
  --color-success: #17BF63;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  
  --transition-default: 0.3s ease;
  
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 16px;
  --spacing-4: 24px;
  --spacing-5: 32px;
  --spacing-6: 48px;
  --spacing-7: 64px;
}

[data-theme="dark"] {
  --color-primary: #1A91DA;
  --color-primary-dark: #0C7ABF;
  --color-secondary: #8899A6;
  --color-text: #FFFFFF;
  --color-text-secondary: #AAB8C2;
  --color-background: #15202B;
  --color-background-secondary: #192734;
  --color-border: #38444D;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.5;
  transition: background-color var(--transition-default), color var(--transition-default);
}

.app-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-3);
}

/* Header Styles */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-3) 0;
  margin-bottom: var(--spacing-5);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  border-radius: 50%;
  position: relative;
}

.logo-icon::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background-color: var(--color-background);
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M22 4s-.7 2.1-2 3.4c1.6 10-9.4 17.3-18 11.6 2.2.1 4.4-.6 6-2C3 15.5.5 9.6 3 5c2.2 2.6 5.6 4.1 9 4-.9-4.2 4-6.6 7-3.8 1.1 0 3-1.2 3-1.2z'%3E%3C/path%3E%3C/svg%3E");
  mask-repeat: no-repeat;
  mask-position: center;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: background-color var(--transition-default);
  position: relative;
}

#theme-toggle:hover {
  background-color: var(--color-background-secondary);
}

.icon-moon, .icon-sun {
  width: 20px;
  height: 20px;
  background-color: currentColor;
  mask-repeat: no-repeat;
  mask-position: center;
  position: absolute;
  transition: opacity var(--transition-default);
}

.icon-moon {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z'%3E%3C/path%3E%3C/svg%3E");
  opacity: 1;
}

.icon-sun {
  mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='5'%3E%3C/circle%3E%3Cline x1='12' y1='1' x2='12' y2='3'%3E%3C/line%3E%3Cline x1='12' y1='21' x2='12' y2='23'%3E%3C/line%3E%3Cline x1='4.22' y1='4.22' x2='5.64' y2='5.64'%3E%3C/line%3E%3Cline x1='18.36' y1='18.36' x2='19.78' y2='19.78'%3E%3C/line%3E%3Cline x1='1' y1='12' x2='3' y2='12'%3E%3C/line%3E%3Cline x1='21' y1='12' x2='23' y2='12'%3E%3C/line%3E%3Cline x1='4.22' y1='19.78' x2='5.64' y2='18.36'%3E%3C/line%3E%3Cline x1='18.36' y1='5.64' x2='19.78' y2='4.22'%3E%3C/line%3E%3C/svg%3E");
  opacity: 0;
}

[data-theme="dark"] .icon-moon {
  opacity: 0;
}

[data-theme="dark"] .icon-sun {
  opacity: 1;
}

/* Rest of your existing CSS remains exactly the same */
/* Hero Section */
.hero {
  text-align: center;
  padding: var(--spacing-5) 0;
  max-width: 700px;
  margin: 0 auto;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-3);
  color: var(--color-text);
  font-weight: 700;
}

.hero p {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-5);
  color: var(--color-text-secondary);
}

/* Form Styles */
#twitter-form {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  gap: var(--spacing-2);
}

.input-group {
  position: relative;
  flex: 1;
}

.input-prefix {
  position: absolute;
  left: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
  font-weight: 500;
}

#twitter-username {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-3) var(--spacing-3) calc(var(--spacing-3) + 1em);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  font-size: 1rem;
  background-color: var(--color-background);
  color: var(--color-text);
  transition: border-color var(--transition-default), box-shadow var(--transition-default);
}

#twitter-username:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(29, 161, 242, 0.2);
}

#analyze-btn {
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--border-radius-md);
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color var(--transition-default), transform var(--transition-default);
}

#analyze-btn:hover {
  background-color: var(--color-primary-dark);
}

#analyze-btn:active {
  transform: scale(0.98);
}

/* Loading Section */
#loading-section {
  text-align: center;
  padding: var(--spacing-6) 0;
}

.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-3);
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-background-secondary);
  border-top: 4px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-status {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* Results Section */
#results-section {
  padding: var(--spacing-5) 0;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-4);
}

.results-header h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

.share-buttons {
  display: flex;
  gap: var(--spacing-2);
}

.share-buttons button {
  padding: var(--spacing-2) var(--spacing-3);
  background-color: var(--color-background-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-default);
}

.share-buttons button:hover {
  background-color: var(--color-border);
}

/* Personality Card */
.personality-card {
  background-color: var(--color-background-secondary);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-4);
  margin-bottom: var(--spacing-5);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.personality-type {
  text-align: center;
}

.personality-type h2 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: var(--spacing-1);
  color: var(--color-primary);
}

.personality-type h3 {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.personality-description {
  font-size: 1.125rem;
  line-height: 1.6;
}

/* Trait Breakdown */
.trait-breakdown {
  margin-bottom: var(--spacing-5);
}

.trait-breakdown h3 {
  margin-bottom: var(--spacing-4);
  font-size: 1.25rem;
  font-weight: 600;
}

.trait-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.trait-pair {
  display: flex;
  gap: var(--spacing-4);
}

.trait {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.trait h4 {
  font-size: 1rem;
  font-weight: 500;
}

.trait-bar {
  height: 12px;
  background-color: var(--color-background-secondary);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
}

.trait-progress {
  height: 100%;
  background-color: var(--color-primary);
  width: 0%;
  transition: width 1s ease-out;
}

.trait-percentage {
  font-size: 0.875rem;
  font-weight: 500;
}

/* Personality Colors */
.INTJ .trait-progress, .INTJ .personality-type h2 { background-color: #4A5568; color: white; }
.INTP .trait-progress, .INTP .personality-type h2 { background-color: #805AD5; color: white; }
.ENTJ .trait-progress, .ENTJ .personality-type h2 { background-color: #DD6B20; color: white; }
.ENTP .trait-progress, .ENTP .personality-type h2 { background-color: #F6AD55; color: #1A202C; }
.INFJ .trait-progress, .INFJ .personality-type h2 { background-color: #6B46C1; color: white; }
.INFP .trait-progress, .INFP .personality-type h2 { background-color: #B794F4; color: #1A202C; }
.ENFJ .trait-progress, .ENFJ .personality-type h2 { background-color: #F56565; color: white; }
.ENFP .trait-progress, .ENFP .personality-type h2 { background-color: #FC8181; color: #1A202C; }
.ISTJ .trait-progress, .ISTJ .personality-type h2 { background-color: #2C5282; color: white; }
.ISFJ .trait-progress, .ISFJ .personality-type h2 { background-color: #4299E1; color: white; }
.ESTJ .trait-progress, .ESTJ .personality-type h2 { background-color: #2F855A; color: white; }
.ESFJ .trait-progress, .ESFJ .personality-type h2 { background-color: #48BB78; color: #1A202C; }
.ISTP .trait-progress, .ISTP .personality-type h2 { background-color: #718096; color: white; }
.ISFP .trait-progress, .ISFP .personality-type h2 { background-color: #A0AEC0; color: #1A202C; }
.ESTP .trait-progress, .ESTP .personality-type h2 { background-color: #D69E2E; color: white; }
.ESFP .trait-progress, .ESFP .personality-type h2 { background-color: #ECC94B; color: #1A202C; }

/* Tweet Examples */
.tweet-examples {
  margin-bottom: var(--spacing-5);
}

.tweet-examples h3 {
  margin-bottom: var(--spacing-4);
  font-size: 1.25rem;
  font-weight: 600;
}

.tweet-card {
  background-color: var(--color-background-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  padding: var(--spacing-3);
  margin-bottom: var(--spacing-3);
}

.tweet-text {
  margin-bottom: var(--spacing-2);
}

.tweet-traits {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-1);
}

.tweet-trait {
  background-color: var(--color-primary);
  color: white;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* Footer */
footer {
  text-align: center;
  padding: var(--spacing-5) 0 var(--spacing-3);
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

footer p {
  margin-bottom: var(--spacing-2);
}

/* Utility Classes */
.hidden {
  display: none;
}

/* Media Queries */
@media (max-width: 768px) {
  .hero h2 {
    font-size: 2rem;
  }
  
  #twitter-form {
    flex-direction: column;
  }
  
  .results-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-3);
  }
  
  .share-buttons {
    width: 100%;
  }
  
  .share-buttons button {
    flex: 1;
  }
  
  .trait-pair {
    flex-direction: column;
    gap: var(--spacing-3);
  }
}

@media (max-width: 480px) {
  .hero h2 {
    font-size: 1.75rem;
  }
  
  .personality-type h2 {
    font-size: 2.5rem;
  }
  
  .personality-type h3 {
    font-size: 1.25rem;
  }
}