/* Quasil - Holistic Wellness Research Archive */
/* Main Stylesheet */

:root {
  --primary: #1A2E35;
  --secondary: #B7C4C8;
  --accent: #849FAB;
  --light: #E0E3E3;
  --white: #FFFFFF;
  --base: 16px;
  --spacing-1: calc(var(--base) * 0.5);
  --spacing-2: var(--base);
  --spacing-3: calc(var(--base) * 1.5);
  --spacing-4: calc(var(--base) * 2);
  --spacing-6: calc(var(--base) * 3);
  --spacing-8: calc(var(--base) * 4);
  --spacing-12: calc(var(--base) * 6);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  font-size: var(--base);
  line-height: 1.6;
  color: var(--primary);
  background-color: var(--light);
}

/* Typography */
h1 {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.2;
  margin-bottom: var(--spacing-6);
  color: var(--primary);
  text-transform: none;
}

h2 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-4);
  color: var(--primary);
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-3);
  color: var(--primary);
}

p {
  margin-bottom: var(--spacing-3);
  font-size: 1.1rem;
  line-height: 1.8;
}

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

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

/* Header & Navigation */
header {
  background-color: var(--white);
  padding: var(--spacing-4) var(--spacing-6);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(26, 46, 53, 0.08);
}

.header-container {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 2px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-8);
}

nav a {
  color: var(--primary);
  font-size: 1rem;
  font-weight: 500;
  transition: color 0.2s ease, border-bottom 0.2s ease;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
}

nav a:hover,
nav a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Main Container */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

/* Hero Section */
.hero {
  background-color: var(--primary);
  color: var(--white);
  padding: calc(var(--spacing-12) * 2) var(--spacing-6);
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(26, 46, 53, 0.7);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--spacing-4);
}

.hero p {
  color: var(--light);
  font-size: 1.3rem;
}

/* Sections */
section {
  padding: var(--spacing-12) var(--spacing-6);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

/* Grid Layout */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-8);
  align-items: center;
}

@media (max-width: 768px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 1.8rem;
  }
  
  nav ul {
    gap: var(--spacing-4);
  }
  
  nav a {
    font-size: 0.9rem;
  }
}

/* Cards */
.card {
  background-color: var(--white);
  padding: var(--spacing-6);
  border: 1px solid var(--secondary);
  box-shadow: 0 4px 12px rgba(26, 46, 53, 0.06);
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 8px 20px rgba(26, 46, 53, 0.12);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card h3 {
  margin-bottom: var(--spacing-3);
}

.card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  margin-bottom: var(--spacing-3);
  border-radius: 4px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-3) var(--spacing-6);
  background-color: var(--accent);
  color: var(--white);
  border: none;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.5px;
  border-radius: 2px;
}

.btn:hover {
  background-color: var(--primary);
  transform: translate(0, -2px);
}

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

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

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

.image-section {
  margin: var(--spacing-8) 0;
  overflow: hidden;
  border-radius: 4px;
}

.image-section img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
}

/* Disclaimer Block */
.disclaimer {
  background-color: var(--secondary);
  color: var(--primary);
  padding: var(--spacing-6);
  border-left: 4px solid var(--accent);
  margin: var(--spacing-8) 0;
  border-radius: 2px;
}

.disclaimer h3 {
  margin-top: 0;
}

/* Footer */
footer {
  background-color: var(--primary);
  color: var(--white);
  padding: var(--spacing-12) var(--spacing-6);
  margin-top: var(--spacing-12);
}

.footer-container {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
}

.footer-section h4 {
  color: var(--white);
  margin-bottom: var(--spacing-3);
  font-size: 1.1rem;
}

.footer-section p {
  font-size: 0.95rem;
  line-height: 1.8;
}

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

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-8);
  padding-top: var(--spacing-6);
  text-align: center;
  font-size: 0.9rem;
  color: var(--light);
}

/* Accessibility */
.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;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--accent);
  font-size: 0.95rem;
}

.mt-6 {
  margin-top: var(--spacing-12);
}

.mb-4 {
  margin-bottom: var(--spacing-4);
}

.py-6 {
  padding-top: var(--spacing-12);
  padding-bottom: var(--spacing-12);
}