/* 
 * Microbiome Tips - Main Stylesheet
 * Brand: Clean Authority (Navy + Burnt Orange)
 * Fonts: Archivo (headings), Inter (body)
 */

/* ===== IMPORTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@600;700&family=Inter:wght@400;500;600&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --color-primary: #1E3A5F;        /* Deep Navy */
  --color-secondary: #5B8C9A;      /* Muted Blue */
  --color-accent: #D4772E;         /* Burnt Orange */
  --color-bg: #FAFBFC;             /* Cool White */
  --color-text: #1F2933;           /* Near Black */
  --color-text-light: #616E7C;     /* Gray 600 */
  --color-border: #E4E7EB;         /* Gray 200 */
  --color-white: #FFFFFF;
  
  /* Typography */
  --font-heading: 'Archivo', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Layout */
  --max-width-content: 720px;
  --max-width-layout: 1200px;
  
  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.12);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: 2.25rem; /* 36px */
  font-weight: 700;
}

h2 {
  font-size: 1.75rem; /* 28px */
  font-weight: 600;
  margin-top: var(--spacing-xl);
}

h3 {
  font-size: 1.375rem; /* 22px */
  font-weight: 600;
  margin-top: var(--spacing-lg);
}

h4, h5, h6 {
  font-family: var(--font-body);
  font-size: 1.125rem; /* 18px */
  font-weight: 600;
}

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

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

strong {
  font-weight: 600;
}

small {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* ===== LAYOUT ===== */
.container {
  max-width: var(--max-width-layout);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
}

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

/* ===== HEADER ===== */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
  color: var(--color-accent);
}

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

.nav a {
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}

.nav a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* Mobile menu toggle (hidden by default, shown on mobile via JS) */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-primary);
  cursor: pointer;
}

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.hero h1 {
  color: var(--color-white);
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.6;
}

.hero .btn {
  margin: 0 var(--spacing-xs);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  cursor: pointer;
  border: 2px solid transparent;
  letter-spacing: 0.02em;
}

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

.btn-primary:hover {
  background-color: #BA6525;
  text-decoration: none;
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-secondary:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  text-decoration: none;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
}

/* ===== CARDS ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card h3 {
  color: var(--color-primary);
  margin-top: 0;
  font-size: 1.25rem;
}

.card p {
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.card a {
  color: var(--color-accent);
  font-weight: 500;
}

.card a:hover {
  text-decoration: underline;
}

/* ===== COMPARISON TABLE ===== */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.comparison-table thead {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.comparison-table th {
  padding: var(--spacing-md);
  text-align: left;
  font-weight: 600;
}

.comparison-table td {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

.comparison-table tbody tr:nth-child(even) {
  background-color: var(--color-bg);
}

.comparison-table tbody tr:hover {
  background-color: #F0F4F8;
}

/* Our Pick Badge */
.badge-pick {
  display: inline-block;
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  margin-left: var(--spacing-xs);
}

/* ===== FOOTER ===== */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-2xl);
}

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

.footer-section h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  color: #B0D4E0;
  text-decoration: none;
}

.footer-section a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.footer-disclaimer {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-md);
  font-size: 0.875rem;
  color: #B0D4E0;
  line-height: 1.5;
}

.footer-disclaimer a {
  color: var(--color-white);
  text-decoration: underline;
}

/* ===== EMAIL SIGNUP ===== */
.email-signup {
  background-color: var(--color-white);
  border: 2px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  max-width: 600px;
  margin: var(--spacing-2xl) auto;
}

.email-signup h2 {
  color: var(--color-primary);
  margin-top: 0;
}

.email-form {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.email-form input[type="email"] {
  flex: 1;
  min-width: 250px;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
}

.email-form button {
  padding: 0.75rem 1.5rem;
}

/* ===== LISTS ===== */
ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-xs);
}

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

.text-muted {
  color: var(--color-text-light);
}

.mt-0 { margin-top: 0 !important; }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .nav {
    display: none; /* Hidden by default on mobile */
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
  }
  
  .nav.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison-table {
    font-size: 0.875rem;
  }
  
  .comparison-table th,
  .comparison-table td {
    padding: var(--spacing-sm);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .email-form {
    flex-direction: column;
  }
  
  .email-form input[type="email"] {
    min-width: 100%;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

@media (min-width: 1025px) {
  h1 {
    font-size: 2.625rem; /* 42px */
  }
  
  h2 {
    font-size: 2rem; /* 32px */
  }
  
  h3 {
    font-size: 1.5rem; /* 24px */
  }
  
  .hero h1 {
    font-size: 3rem;
  }
}