:root {
  --color-bg: #faf8f4;
  --color-bg-alt: #f1ede4;
  --color-text: #2b2a26;
  --color-text-muted: #6b6a63;
  --color-accent: #4a5d3a;
  --color-accent-dark: #384828;
  --color-border: #e2ddd0;
  --max-width: 1100px;
  --radius: 10px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-heading: Georgia, "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  line-height: 1.25;
  margin-top: 0;
}

h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

p {
  color: var(--color-text-muted);
}

a {
  color: var(--color-accent);
}

/* Header */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--color-text);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 20px;
}

.site-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--color-accent);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
}

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

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

/* Hero */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  max-width: 750px;
  margin: 0 auto 20px;
}

.hero-subhead {
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto 32px;
}

/* Problem statement */
.problem {
  background: var(--color-bg-alt);
  padding: 48px 0;
}

.problem p {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--color-text);
  text-align: center;
}

/* How it works */
.how-it-works {
  padding: 60px 0;
  text-align: center;
}

.how-it-works p {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* Products */
.products {
  padding: 60px 0;
  background: var(--color-bg-alt);
}

.products h2 {
  text-align: center;
  margin-bottom: 2rem;
}

.affiliate-disclosure {
  max-width: 620px;
  margin: -1.2rem auto 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.category-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
}

.filter-btn {
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
}

.filter-btn:hover {
  border-color: var(--color-accent);
}

.filter-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.product-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.product-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: var(--color-bg-alt);
}

.product-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-card h3 {
  font-family: var(--font-body);
  font-size: 1.05rem;
  margin: 0 0 6px;
}

.product-fiber {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent-dark);
  background: #e7ede1;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  align-self: flex-start;
}

.product-verification {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 14px;
  flex-grow: 1;
}

.product-price-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 0 0 12px;
}

.product-card .btn {
  text-align: center;
  width: 100%;
  padding: 10px 20px;
  font-size: 0.9rem;
}

/* Signup */
.signup {
  padding: 60px 0;
  text-align: center;
}

.signup h2 {
  margin-bottom: 1.5rem;
}

.signup-form {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 480px;
  margin: 0 auto;
}

.signup-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-body);
}

.signup-form input[type="email"]:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.signup-message {
  margin-top: 14px;
  font-size: 0.95rem;
  color: var(--color-accent-dark);
  min-height: 1.2em;
}

/* About */
.about {
  padding: 60px 0;
  background: var(--color-bg-alt);
}

.about p {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--color-text);
}

/* FAQ */
.faq {
  padding: 60px 0;
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.faq-item p {
  margin: 0;
}

/* Articles list */
.articles-hero {
  padding: 56px 24px 24px;
  text-align: center;
}

.articles-hero h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.article-list {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 24px 64px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.article-card h2 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.article-card h2 a {
  color: var(--color-text);
  text-decoration: none;
}

.article-card h2 a:hover {
  color: var(--color-accent);
}

.article-card p {
  margin-bottom: 12px;
}

.article-card .read-more {
  font-weight: 600;
  color: var(--color-accent-dark);
  text-decoration: none;
  font-size: 0.95rem;
}

/* Article page */
.article-hero {
  padding: 56px 24px 16px;
  max-width: 760px;
  margin: 0 auto;
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--color-accent-dark);
  text-decoration: none;
  font-size: 0.9rem;
}

.article-hero h1 {
  font-size: 2rem;
  max-width: 720px;
}

.article-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 64px;
  font-size: 1.05rem;
  color: var(--color-text);
}

.article-content p {
  color: var(--color-text);
  margin-bottom: 1.2em;
}

.article-content h2 {
  font-size: 1.4rem;
  margin: 1.8em 0 0.6em;
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.2em;
  padding-left: 1.4em;
}

.article-content li {
  margin-bottom: 0.5em;
}

.article-content strong {
  color: var(--color-text);
}

/* Footer */
.site-footer {
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.site-footer p {
  margin: 4px 0;
}

.footer-contact {
  font-size: 0.9rem;
}

.footer-contact a {
  color: var(--color-accent-dark);
  font-weight: 600;
}

.footer-copy {
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 600px) {
  .hero {
    padding: 56px 0 40px;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .site-nav {
    gap: 12px;
  }

  .site-nav a {
    font-size: 0.85rem;
  }

  .signup-form {
    flex-direction: column;
  }

  .signup-form .btn {
    width: 100%;
  }
}