/* ===================================
   VitaFlow Care - Landing Page Styles
   Design System v1.0 - Light Theme
   =================================== */

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

:root {
  /* Colors - Light Theme */
  --primary-accent: #6CE9A6;
  --secondary-accent: #0891B2;
  --success: #6CE9A6;
  --warning: #FDB022;
  --error: #F04438;
  
  --light-background: #F2F4F7;
  --light-surface: #FFFFFF;
  --light-text-primary: #101828;
  --light-text-secondary: #667085;
  --light-border: #D0D5DD;
  
  /* Typography */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Poppins', sans-serif;
  
  /* Spacing - 8pt grid */
  --spacing-xs: 8px;
  --spacing-s: 16px;
  --spacing-m: 24px;
  --spacing-l: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;
  
  /* Border Radius */
  --radius-standard: 12px;
  --radius-large: 16px;
  --radius-full: 999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05);
  --shadow-md: 0 4px 8px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 12px 24px rgba(16, 24, 40, 0.12);
  
  /* Animation */
  --transition-fast: 150ms ease-out;
  --transition-normal: 250ms ease-out;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--light-text-primary);
  background-color: var(--light-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.2;
  margin-bottom: var(--spacing-s);
}

h1 { font-size: 48px; font-weight: 700; }
h2 { font-size: 32px; font-weight: 700; }
h3 { font-size: 24px; font-weight: 600; }
h4 { font-size: 20px; font-weight: 600; }

p {
  margin-bottom: var(--spacing-s);
  color: var(--light-text-secondary);
}

a {
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-fast);
}

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

/* === Navigation === */
.hero {
  background: linear-gradient(135deg, #101828 0%, #1D2939 100%);
  color: #F2F4F7;
  padding: var(--spacing-m) 0 var(--spacing-3xl);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-m);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-m);
  padding-bottom: var(--spacing-l);
}

.logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo-image {
  height: 40px;
  width: auto;
  display: block;
}

.logo-text {
  color: #F2F4F7;
}

.logo-accent {
  color: var(--primary-accent);
}

.nav-links {
  display: flex;
  gap: var(--spacing-l);
}

.nav-link {
  color: #F2F4F7;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary-accent);
}

/* === Hero Section === */
.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-m) 0;
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  color: #F2F4F7;
  margin-bottom: var(--spacing-m);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 20px;
  color: #98A2B3;
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

/* === Audience Selector === */
.audience-selector {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-m);
  max-width: 900px;
  margin: 0 auto var(--spacing-xl);
}

.audience-option {
  background-color: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-large);
  padding: var(--spacing-l);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.audience-option:hover {
  background-color: rgba(108, 233, 166, 0.1);
  border-color: var(--primary-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.audience-option:hover .audience-arrow {
  transform: translateX(8px);
}

.audience-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
  border-radius: var(--radius-large);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-m);
}

.audience-icon .material-symbols-outlined {
  font-size: 48px;
  color: var(--light-text-primary);
}

.audience-option h3 {
  color: #F2F4F7;
  margin-bottom: var(--spacing-xs);
  font-size: 24px;
}

.audience-option p {
  color: #98A2B3;
  font-size: 15px;
  margin-bottom: var(--spacing-s);
}

.audience-arrow {
  display: inline-block;
  color: var(--primary-accent);
  font-size: 24px;
  font-weight: bold;
  transition: transform var(--transition-normal);
}

/* === Content Sections === */
.content-section {
  display: none;
  animation: fadeIn 0.5s ease-in;
}

.content-section.active {
  display: block;
}

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

.hero-cta {
  display: flex;
  gap: var(--spacing-s);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-l);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background-color: rgba(108, 233, 166, 0.1);
  border: 1px solid rgba(108, 233, 166, 0.2);
  padding: var(--spacing-xs) var(--spacing-s);
  border-radius: var(--radius-full);
  color: var(--primary-accent);
  font-size: 14px;
  font-weight: 500;
}

.hero-badge .material-symbols-outlined {
  font-size: 18px;
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: var(--spacing-s) var(--spacing-l);
  border-radius: var(--radius-standard);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  letter-spacing: 0.5px;
}

.btn-primary {
  background-color: var(--primary-accent);
  color: var(--light-text-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: #5DD895;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: #F2F4F7;
  border: 2px solid var(--secondary-accent);
}

.btn-secondary:hover {
  background-color: rgba(95, 232, 213, 0.1);
  border-color: var(--primary-accent);
  color: var(--primary-accent);
}

.btn-large {
  padding: var(--spacing-m) var(--spacing-xl);
  font-size: 18px;
}

/* === Section Styling === */
section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-s);
  color: var(--light-text-primary);
}

.section-subtitle {
  text-align: center;
  font-size: 18px;
  color: var(--light-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-xl);
}

/* === Problem Section === */
.problem-section {
  background-color: var(--light-surface);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-l);
  margin-top: var(--spacing-xl);
}

.problem-card {
  text-align: center;
  padding: var(--spacing-l);
  background-color: #FEF3F2;
  border-radius: var(--radius-large);
  border: 1px solid #FEE4E2;
}

.problem-card h3 {
  color: var(--light-text-primary);
  margin-bottom: var(--spacing-s);
}

.problem-card p {
  color: var(--light-text-secondary);
  font-size: 15px;
}

.icon-warning {
  font-size: 48px;
  color: var(--error);
  margin-bottom: var(--spacing-s);
}

/* === Features Section === */
.features-section {
  background-color: var(--light-background);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-l);
  margin-top: var(--spacing-xl);
}

.feature-card {
  background-color: var(--light-surface);
  padding: var(--spacing-l);
  border-radius: var(--radius-large);
  border: 1px solid var(--light-border);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-accent);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-accent), var(--secondary-accent));
  border-radius: var(--radius-standard);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-s);
}

.feature-icon .material-symbols-outlined {
  font-size: 32px;
  color: var(--light-text-primary);
}

.feature-card h3 {
  color: var(--light-text-primary);
  margin-bottom: var(--spacing-s);
  font-size: 20px;
}

.feature-card p {
  color: var(--light-text-secondary);
  font-size: 15px;
  line-height: 1.6;
}

/* === Benefits Section === */
.benefits-section {
  background-color: var(--light-surface);
}

.benefits-list {
  max-width: 900px;
  margin: var(--spacing-xl) auto 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-l);
}

.benefit-item {
  display: flex;
  gap: var(--spacing-l);
  align-items: flex-start;
  padding: var(--spacing-l);
  background-color: var(--light-background);
  border-radius: var(--radius-large);
  border-left: 4px solid var(--primary-accent);
}

.benefit-number {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 700;
  color: var(--primary-accent);
  line-height: 1;
  min-width: 80px;
}

.benefit-content h3 {
  color: var(--light-text-primary);
  margin-bottom: var(--spacing-xs);
}

.benefit-content p {
  color: var(--light-text-secondary);
  margin-bottom: 0;
}

/* === Audience Section === */
.audience-section {
  background-color: var(--light-background);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-m);
  margin-top: var(--spacing-xl);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.audience-card {
  background-color: var(--light-surface);
  padding: var(--spacing-l);
  border-radius: var(--radius-large);
  text-align: center;
  border: 1px solid var(--light-border);
  transition: all var(--transition-normal);
}

.audience-card:hover {
  border-color: var(--primary-accent);
  box-shadow: var(--shadow-md);
}

.audience-card .material-symbols-outlined {
  font-size: 48px;
  color: var(--primary-accent);
  margin-bottom: var(--spacing-s);
}

.audience-card h4 {
  color: var(--light-text-primary);
  font-size: 16px;
  margin-bottom: 0;
}

/* === CTA Section === */
.cta-section {
  background: linear-gradient(135deg, var(--primary-accent) 0%, var(--secondary-accent) 100%);
  color: var(--light-text-primary);
}

.cta-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta-title {
  color: var(--light-text-primary);
  margin-bottom: var(--spacing-s);
}

.cta-text {
  font-size: 18px;
  color: var(--light-text-primary);
  margin-bottom: var(--spacing-l);
  opacity: 0.9;
}

.cta-buttons {
  margin-bottom: var(--spacing-m);
}

.cta-note {
  font-size: 14px;
  color: var(--light-text-primary);
  font-weight: 500;
  opacity: 0.8;
}

/* === Footer === */
.footer {
  background-color: #101828;
  color: #F2F4F7;
  padding: var(--spacing-2xl) 0 var(--spacing-l);
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand p {
  color: #98A2B3;
  margin-top: var(--spacing-s);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-l);
}

.footer-column h4 {
  color: #F2F4F7;
  font-size: 16px;
  margin-bottom: var(--spacing-s);
}

.footer-column a {
  display: block;
  color: #98A2B3;
  margin-bottom: var(--spacing-xs);
  font-size: 14px;
}

.footer-column a:hover {
  color: var(--primary-accent);
}

.footer-location {
  color: #98A2B3;
  font-size: 14px;
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-l);
  border-top: 1px solid #344054;
}

.footer-bottom p {
  color: #98A2B3;
  font-size: 14px;
  margin: 0;
}

/* === Responsive Design === */
@media (max-width: 1024px) {
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
    max-width: 600px;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 36px;
  }
  
  .hero-subtitle {
    font-size: 18px;
  }
  
  h2 {
    font-size: 28px;
  }
  
  .nav-links {
    display: none;
  }
  
  .audience-selector {
    grid-template-columns: 1fr;
  }
  
  .audience-option h3 {
    font-size: 20px;
  }
  
  .audience-icon {
    width: 64px;
    height: 64px;
  }
  
  .audience-icon .material-symbols-outlined {
    font-size: 36px;
  }
  
  .features-grid,
  .problem-grid {
    grid-template-columns: 1fr;
  }
  
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .benefit-item {
    flex-direction: column;
    text-align: center;
  }
  
  .benefit-number {
    min-width: auto;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
  }
  
  .hero-title {
    font-size: 32px;
  }
  
  .audience-grid {
    grid-template-columns: 1fr;
  }
  
  section {
    padding: var(--spacing-2xl) 0;
  }
}