/* ============================================
   pH Prescription Website - Main Styles
   ============================================ */

/* CSS Variables */
:root {
  /* Colors - Based on phprescription.com brand */
  --color-primary: #6B2C91;        /* Purple from logo */
  --color-primary-dark: #4A1F66;   /* Darker purple */
  --color-primary-light: #F3E8FA;  /* Light purple */
  --color-secondary: #FFFFFF;
  --color-teal: #00808B;           /* Teal from logo/caduceus */
  --color-teal-dark: #006570;
  --color-teal-light: #E6F5F7;
  --color-accent: #4A1F66;         /* Dark purple for accents */
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #E0E0E0;
  --color-background: #F9F9F9;
  --color-success: #28a745;
  --color-error: #dc3545;

  /* Typography */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Georgia', 'Times New Roman', serif;

  /* Font Sizes */
  --font-size-small: 0.875rem;     /* 14px */
  --font-size-base: 1rem;          /* 16px */
  --font-size-medium: 1.125rem;    /* 18px */
  --font-size-large: 1.25rem;      /* 20px */
  --font-size-h1: 2.5rem;          /* 40px */
  --font-size-h2: 2rem;            /* 32px */
  --font-size-h3: 1.5rem;          /* 24px */
  --font-size-h4: 1.25rem;         /* 20px */

  /* Spacing */
  --spacing-xs: 0.5rem;     /* 8px */
  --spacing-sm: 1rem;       /* 16px */
  --spacing-md: 1.5rem;     /* 24px */
  --spacing-lg: 2rem;       /* 32px */
  --spacing-xl: 3rem;       /* 48px */
  --spacing-xxl: 4rem;      /* 64px */

  /* Layout */
  --container-width: 1200px;
  --container-padding: 1.5rem;
  --border-radius: 8px;
  --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --box-shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-speed: 0.3s;
}

/* ============================================
   CSS Reset & Base Styles
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-secondary);
  -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-md);
  font-weight: 700;
  color: var(--color-accent);
}

h1 {
  font-size: var(--font-size-h1);
}

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

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

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

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-speed);
}

a:hover {
  color: var(--color-primary-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  margin-left: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Layout & Container
   ============================================ */

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

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

.section-alt {
  background-color: var(--color-background);
}

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

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

/* ============================================
   Header
   ============================================ */

.site-header {
  background-color: var(--color-secondary);
  box-shadow: var(--box-shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-top {
  background-color: var(--color-teal);
  color: var(--color-secondary);
  padding: var(--spacing-xs) 0;
  font-size: var(--font-size-small);
}

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

.header-contact {
  display: flex;
  gap: var(--spacing-md);
}

.header-contact a {
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.header-contact a:hover {
  opacity: 0.8;
}

.header-main {
  padding: var(--spacing-sm) 0;
}

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

.logo img {
  height: 60px;
  width: auto;
}

/* Navigation */
.nav {
  display: flex;
  gap: 0;
  list-style: none;
  margin: 0;
  align-items: center;
}

.nav li {
  margin: 0;
}

.nav > li > a {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  transition: all var(--transition-speed);
  display: block;
  white-space: nowrap;
}

.nav > li > a:hover,
.nav > li > a.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.nav > li > a.btn {
  margin-left: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-lg);
}

.nav > li > a.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-secondary) !important;
  border-color: var(--color-primary);
}

.nav > li > a.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-secondary) !important;
  transform: translateY(-1px);
}

/* Dropdown Menus */
.has-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  min-width: 220px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  border-radius: var(--border-radius);
  list-style: none;
  padding: 0.5rem 0;
  margin: 0;
  display: none;
  z-index: 9999;
}

.dropdown-menu li {
  margin: 0;
}

.dropdown-menu a {
  display: block;
  padding: 0.75rem 1.25rem;
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-speed);
  font-weight: 500;
}

.dropdown-menu a:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

@media (min-width: 768px) {
  .has-dropdown:hover > .dropdown-menu {
    display: block;
  }
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  background-color: var(--color-accent);
  color: var(--color-secondary);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-large);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--font-size-small);
}

.footer-section a:hover {
  color: var(--color-secondary);
}

.footer-section ul {
  list-style: none;
  margin: 0;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.6);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background-color var(--transition-speed);
}

.social-links a:hover {
  background-color: var(--color-primary);
}

/* ============================================
   Utility Classes
   ============================================ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.spacer-sm {
  margin-top: var(--spacing-sm);
}

.spacer-md {
  margin-top: var(--spacing-md);
}

.spacer-lg {
  margin-top: var(--spacing-lg);
}

.spacer-xl {
  margin-top: var(--spacing-xl);
}