/* =====================================
   BodyMind Website Design System
   Matching bodymindapp.vercel.app
   ===================================== */

/* === CSS RESET === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* === ROOT VARIABLES === */
:root {
  /* Colors from bodymindapp */
  --emerald-500: #10B981;
  --emerald-400: #34D399;
  --emerald-600: #059669;
  
  --slate-50: #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-700: #334155;
  --slate-900: #0F172A;
  
  --white: #FFFFFF;
  --black: #000000;
  
  /* Backgrounds - White Hi-Tech */
  --bg-light: #FFFFFF;
  --bg-secondary: #F8F9FA;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8F9FA;
  
  /* Borders - Light Theme */
  --border-light: #E5E7EB;
  --border-medium: #D1D5DB;
  
  /* Text - Dark on Light */
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --text-white: #FFFFFF;
  
  /* Spacing (matching app) */
  --spacing-xs: 0.25rem;  /* 4px */
  --spacing-sm: 0.5rem;   /* 8px */
  --spacing-md: 1rem;     /* 16px */
  --spacing-lg: 1.5rem;   /* 24px */
  --spacing-xl: 2rem;     /* 32px */
  --spacing-2xl: 3rem;    /* 48px */
  --spacing-3xl: 4rem;    /* 64px */
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-sm: 0.875rem;   /* 14px - matching text-sm */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Border radius (matching app) */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;  /* 6px - matching rounded-md */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* === GLOBAL STYLES === */
body {
  font-family: var(--font-family);
  background-color: var(--bg-light);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: var(--font-size-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-4xl);
}

h3 {
  font-size: var(--font-size-3xl);
}

h4 {
  font-size: var(--font-size-2xl);
}

h5 {
  font-size: var(--font-size-xl);
}

h6 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  line-height: 1.7;
}

a {
  color: var(--emerald-500);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--emerald-400);
}

/* === BUTTON STYLES (matching bodymindapp exactly) === */

/* Base button styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-base);
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  text-decoration: none;
  gap: var(--spacing-sm);
  font-family: var(--font-family);
  outline: none;
}

.btn:disabled {
  pointer-events: none;
  opacity: 0.5;
}

.btn:focus-visible {
  ring: 3px;
  ring-color: rgba(16, 185, 129, 0.5);
}

/* Primary button (emerald - matching "Start Session") */
.btn-primary {
  height: 2.5rem; /* h-10 = 40px */
  padding: 0 1.5rem; /* px-6 = 24px */
  background-color: var(--emerald-500);
  color: var(--text-white);
}

.btn-primary:hover {
  background-color: var(--emerald-400);
}

.btn-primary:active {
  background-color: var(--emerald-600);
}

/* Secondary button (transparent with border - matching "View History") */
.btn-secondary {
  height: 2.25rem; /* h-9 = 36px */
  padding: 0.5rem 1rem; /* px-4 py-2 */
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1.5px solid var(--border-light);
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--emerald-500);
  box-shadow: 0 2px 4px 0 rgba(16, 185, 129, 0.15);
}

/* Large button variant */
.btn-lg {
  height: 3rem;
  padding: 0 2rem;
  font-size: var(--font-size-base);
}

/* Small button variant */
.btn-sm {
  height: 2rem;
  padding: 0 0.75rem;
  font-size: var(--font-size-sm);
}

/* Filter button styles (updates page) */
.filter-btn {
  transition: all var(--transition-base);
}

.filter-btn.active {
  background-color: var(--emerald-500) !important;
  color: var(--text-white) !important;
  border-color: var(--emerald-500) !important;
}

.filter-btn:not(.active):hover {
  border-color: var(--emerald-500);
  color: var(--emerald-500);
}

/* === CARD STYLES === */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.card:hover {
  background-color: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  border-color: var(--emerald-500);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.card-text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

/* === NAVIGATION === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-logo {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  text-decoration: none;
}

.navbar-links {
  display: flex;
  gap: var(--spacing-xl);
  align-items: center;
  list-style: none;
}

.navbar-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.navbar-link:hover {
  color: var(--text-primary);
}

.navbar-link.active {
  color: var(--emerald-500);
}

/* Mobile menu toggle */
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: var(--font-size-2xl);
  cursor: pointer;
}

/* === CONTAINER & LAYOUT === */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-3xl) 0;
}

@media (min-width: 768px) {
  .section {
    padding: 5rem 0;
  }
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-subtitle {
  text-align: center;
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
}

/* === HERO SECTION === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
  margin-top: 60px;
  background: linear-gradient(180deg, #FFFFFF 0%, #F9FAFB 100%);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* === FORM STYLES (matching app inputs) === */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  height: 2.5rem;
  padding: 0 var(--spacing-md);
  font-size: var(--font-size-sm);
  font-family: var(--font-family);
  color: var(--text-primary);
  background-color: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  outline: none;
}

.form-textarea {
  height: auto;
  min-height: 100px;
  padding: var(--spacing-md);
  resize: vertical;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--emerald-500);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}

/* === GRID LAYOUTS === */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* === STATS/METRICS === */
.stats {
  display: flex;
  gap: var(--spacing-2xl);
  justify-content: center;
  flex-wrap: wrap;
  padding: var(--spacing-2xl) 0;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--emerald-500);
  display: block;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === FOOTER === */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-3xl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
}

.footer-section-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
}

.footer-link {
  display: block;
  padding: var(--spacing-xs) 0;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--emerald-500);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  border-top: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

/* === UTILITIES === */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.text-emerald {
  color: var(--emerald-500);
}

.text-primary {
  color: var(--text-primary);
}

.text-secondary {
  color: var(--text-secondary);
}

.bg-light-green {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(16, 185, 129, 0.02));
}

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

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

.fade-in {
  animation: fadeIn 0.6s ease-out forwards;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }
  
  .navbar-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    border-top: 1px solid var(--border-light);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  }
  
  .navbar-links.active {
    display: flex;
  }
  
  .navbar-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 300px;
  }
  
  .stats {
    flex-direction: column;
    gap: var(--spacing-xl);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
}