/* ==========================================================================
   HighIQ Nootropics — stylesheet
   Colors, fonts and spacing are defined once as variables below.
   Change a value here and it updates everywhere on the site.
   ========================================================================== */

:root {
  --color-primary: #3e7aaa;
  --color-primary-dark: #2f5f84;
  --color-footer: #4a6fa1;
  --color-text: #222222;
  --color-text-light: #5b5b5b;
  --color-bg: #ffffff;
  --color-bg-alt: #f7f9fb;
  --color-border: #e6e9ec;
  --font-heading: "Montserrat", Helvetica, Arial, sans-serif;
  --font-body: "Montserrat", Helvetica, Arial, sans-serif;
  --max-width: 1180px;
  --radius: 10px;
}

* {
  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;
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  margin: 0 0 0.5em;
}

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

/* -------------------- Header -------------------- */

.site-header {
  background: var(--color-primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
}

.site-branding {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-branding img {
  height: 80px;
  width: auto;
}

.site-branding .site-title {
  font-size: 1.8rem;
  line-height: 1.1;
  color: #fff;
}

.site-branding .site-title small {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  opacity: 0.85;
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: 32px;
  margin: 0;
  padding: 0;
}

.site-nav a {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.site-nav a:hover,
.site-nav a.is-active {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}

.nav-toggle span {
  width: 26px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
}

/* -------------------- Hero -------------------- */

.hero {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 56px 0;
  text-align: center;
}

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

.hero p {
  max-width: 640px;
  margin: 0 auto;
  color: var(--color-text-light);
}

/* -------------------- Product categories / grid -------------------- */

.category {
  padding: 48px 0 8px;
}

.category-title {
  text-align: center;
  font-size: 1.7rem;
  margin-bottom: 20px;
}

.category-info {
  max-width: 760px;
  margin: 0 auto 36px;
  padding: 20px 24px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.92rem;
  color: var(--color-text-light);
}

.category-info p {
  margin: 0 0 10px;
}

.category-info p:last-child {
  margin-bottom: 0;
}

.category-info strong {
  color: var(--color-text);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.product-card:hover {
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-3px);
}

.product-card-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px;
  height: 100%;
}

.product-card-image {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.product-card-image img {
  max-height: 160px;
  width: auto;
  margin: 0 auto;
}

.product-card-eyebrow {
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  margin: 0 0 6px;
}

.product-card-name {
  font-size: 1.02rem;
  margin: 0 0 6px;
  min-height: 2.6em;
}

.product-card-note {
  font-size: 0.78rem;
  color: var(--color-text-light);
  margin: 0 0 16px;
  min-height: 2.4em;
}

.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
}

.btn-buy {
  background: var(--color-primary);
  color: #fff;
  margin-top: auto;
}

.product-card-link:hover .btn-buy {
  background: var(--color-primary-dark);
}

/* -------------------- Product detail page -------------------- */

.breadcrumb {
  font-size: 0.82rem;
  color: var(--color-text-light);
  margin: 28px 0 0;
}

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

.product-detail {
  padding: 24px 0 16px;
}

.product-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.product-detail-image {
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-detail-image img {
  width: 100%;
  height: auto;
}

.product-detail-eyebrow {
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.product-detail-info h1 {
  font-size: 1.9rem;
  margin-bottom: 12px;
}

.product-detail-note {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 20px;
}

.btn-buy-large {
  padding: 14px 32px;
  font-size: 0.9rem;
}

.product-detail-category {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.product-detail-category a {
  color: var(--color-primary-dark);
  font-weight: 700;
}

.category-info-block {
  max-width: 760px;
  margin: 40px auto 0;
  padding: 24px 28px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.category-info-block h2 {
  font-size: 1.15rem;
  margin-bottom: 14px;
}

.category-info-block p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  margin: 0 0 10px;
}

.category-info-block p:last-child {
  margin-bottom: 0;
}

.category-info-block strong {
  color: var(--color-text);
}

.product-detail-disclaimer {
  max-width: 760px;
  margin: 32px auto 0;
  font-size: 0.76rem;
  color: var(--color-text-light);
  text-align: center;
}

.related-products {
  padding: 56px 0 8px;
}

.related-products h2 {
  font-size: 1.4rem;
  margin-bottom: 24px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .product-detail-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .related-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
}

/* -------------------- Affiliate disclosure -------------------- */

.disclosure {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  margin-top: 56px;
  padding: 20px 0;
}

.disclosure p {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  font-size: 0.82rem;
  color: var(--color-text-light);
  text-align: center;
}

.disclosure p + p {
  margin-top: 10px;
}

/* -------------------- Generic page content (About / Contact / Blog) -------------------- */

.page-content {
  padding: 56px 0;
  max-width: 820px;
  margin: 0 auto;
}

.page-content h1 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.page-content h2 {
  font-size: 1.3rem;
  margin-top: 32px;
}

.page-content p {
  color: var(--color-text-light);
}

.contact-details {
  list-style: none;
  padding: 0;
  margin: 24px 0;
  display: grid;
  gap: 12px;
}

.contact-details li {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 20px;
}

.contact-details strong {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}

.blog-list {
  display: grid;
  gap: 20px;
  margin-top: 32px;
}

.blog-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--color-bg-alt);
}

.blog-card h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.blog-meta {
  font-size: 0.78rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.blog-post {
  padding-top: 24px;
}

.blog-post ul {
  color: var(--color-text-light);
  padding-left: 20px;
  margin: 0 0 16px;
}

.blog-post li {
  margin-bottom: 6px;
}

.blog-post strong {
  color: var(--color-text);
}

/* -------------------- Footer -------------------- */

.site-footer {
  background: var(--color-footer);
  color: #eef3fb;
  margin-top: 64px;
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

.footer-brand img {
  height: 64px;
  margin-bottom: 12px;
}

.footer-brand p {
  color: #dbe6f7;
  font-style: italic;
  font-size: 0.92rem;
}

.site-footer h4 {
  color: #fff;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.site-footer a:hover {
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: #cfdcf1;
}

/* -------------------- Responsive -------------------- */

@media (max-width: 900px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    width: 100%;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 16px;
  }

  .site-header .container {
    flex-wrap: wrap;
  }

  .product-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}