/* Future Skill Gap Visualizer - Professional CSS */
/* Color System */
:root {
  --bg-primary: #0F172A;
  --surface-dark: #111827;
  --card-bg: #1F2937;
  --text-primary: #FFFFFF;
  --accent-cyan: #22D3EE;
  --success-green: #22C55E;
  --warning-orange: #F59E0B;
  --muted: #9CA3AF;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #22D3EE 0%, #3B82F6 100%);
  --gradient-success: linear-gradient(135deg, #22C55E 0%, #16A34A 100%);
  --gradient-warning: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* 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);
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  font-weight: 400;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

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

/* Header */
.header {
  background: var(--surface-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-lg) 0;
}

.brand-title {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0;
}

/* Hero Section */
.hero {
  padding: var(--spacing-2xl) 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
}

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

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--accent-cyan);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

.hero-supporting {
  font-size: 1rem;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-subtitle {
    font-size: 1.125rem;
  }
}

/* Trust Section */
.trust-section {
  padding: var(--spacing-lg) 0;
  background: var(--surface-dark);
}

.trust-disclaimers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.disclaimer {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--card-bg);
  border-radius: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

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

.disclaimer-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.disclaimer span:last-child {
  font-weight: 500;
  color: var(--text-primary);
}

/* Main Content */
.main {
  padding: var(--spacing-2xl) 0;
}

/* Input Section */
.input-section {
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
}

.input-group {
  background: var(--card-bg);
  padding: var(--spacing-2xl);
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-lg);
}

.input-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
  font-size: 1.75rem;
}

.input-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  font-size: 1.125rem;
}

/* Age Selector */
.age-selector {
  margin-bottom: var(--spacing-xl);
}

.age-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.age-option input[type="radio"] {
  display: none;
}

.age-option label {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-lg);
  background: var(--surface-dark);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.75rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.age-option label:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.age-option input[type="radio"]:checked + label {
  border-color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.1);
}

.age-range {
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
}

.age-horizon {
  font-size: 0.875rem;
  color: var(--muted);
}

/* Interest Selector */
.interest-selector {
  margin-bottom: var(--spacing-xl);
}

.interest-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-sm);
}

.interest-option input[type="checkbox"] {
  display: none;
}

.interest-option label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--surface-dark);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.75rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.interest-option label:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-1px);
}

.interest-option input[type="checkbox"]:checked + label {
  border-color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.1);
}

.interest-icon {
  font-size: 1.25rem;
}

.interest-name {
  font-weight: 500;
}

/* Analyze Button */
.analyze-btn {
  width: 100%;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 0.75rem;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-md);
}

.analyze-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.analyze-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Results Section */
.results-section {
  display: grid;
  gap: var(--spacing-xl);
}

.result-card {
  background: var(--card-bg);
  padding: var(--spacing-xl);
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

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

.result-title {
  color: var(--accent-cyan);
  margin-bottom: var(--spacing-sm);
}

.result-description {
  color: var(--muted);
  margin-bottom: var(--spacing-lg);
  font-size: 1.125rem;
}

/* Skill Map */
.skill-clusters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.skill-cluster {
  background: var(--surface-dark);
  padding: var(--spacing-lg);
  border-radius: 0.75rem;
  border-left: 4px solid var(--accent-cyan);
}

.cluster-title {
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.skill-list {
  list-style: none;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.skill-icon {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
  flex-shrink: 0;
}

.skill-name {
  font-weight: 500;
}

/* School Gap */
.gap-items {
  display: grid;
  gap: var(--spacing-md);
}

.gap-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--surface-dark);
  border-radius: 0.75rem;
}

.gap-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.gap-icon.success {
  color: var(--success-green);
}

.gap-icon.warning {
  color: var(--warning-orange);
}

.gap-icon.danger {
  color: #EF4444;
}

.gap-content {
  flex: 1;
}

.gap-skill {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.gap-status {
  font-size: 0.875rem;
  color: var(--muted);
}

/* Early Start */
.start-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.start-item {
  background: var(--surface-dark);
  padding: var(--spacing-lg);
  border-radius: 0.75rem;
  border-top: 4px solid var(--success-green);
}

.start-title {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.start-description {
  color: var(--muted);
  font-size: 0.875rem;
}

/* Age Actions */
.action-groups {
  display: grid;
  gap: var(--spacing-lg);
}

.action-group {
  background: var(--surface-dark);
  padding: var(--spacing-lg);
  border-radius: 0.75rem;
  border-left: 4px solid var(--accent-cyan);
}

.action-title {
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--accent-cyan);
}

.action-list {
  list-style: none;
}

.action-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.action-bullet {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  flex-shrink: 0;
  margin-top: 0.5rem;
}

/* FAQ Section */
.faq-section {
  padding: var(--spacing-2xl) 0;
  background: var(--surface-dark);
}

.faq-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  color: var(--text-primary);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: var(--spacing-lg);
}

.faq-item {
  background: var(--card-bg);
  padding: var(--spacing-lg);
  border-radius: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.faq-question {
  color: var(--accent-cyan);
  margin-bottom: var(--spacing-sm);
  font-size: 1.125rem;
}

.faq-answer {
  color: var(--muted);
  line-height: 1.6;
}

/* Footer */
.footer {
  background: var(--surface-dark);
  padding: var(--spacing-lg) 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer p {
  color: var(--muted);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .input-group {
    padding: var(--spacing-lg);
  }
  
  .age-options {
    grid-template-columns: 1fr;
  }
  
  .interest-options {
    grid-template-columns: 1fr;
  }
  
  .trust-disclaimers {
    grid-template-columns: 1fr;
  }
  
  .skill-clusters {
    grid-template-columns: 1fr;
  }
  
  .start-items {
    grid-template-columns: 1fr;
  }
}

/* Loading States */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--accent-cyan);
  animation: spin 1s ease-in-out infinite;
}

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

/* Focus States for Accessibility */
input:focus,
button:focus,
label:focus {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .header,
  .trust-section,
  .input-section,
  .footer {
    display: none;
  }
  
  .hero {
    background: none;
    color: black;
  }
  
  .result-card {
    background: white;
    border: 1px solid #ccc;
    box-shadow: none;
  }
}