/* ============================================
   SMARTER WEIGHT LOSS — Global Styles
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #1a6b52;
  --color-primary-dark: #155a44;
  --color-heading: #1a2e25;
  --color-body: #2a3d34;
  --color-muted: #5a6b63;
  --color-label: #6b7c75;
  --color-light-text: #8a9690;
  --color-bg: #ffffff;
  --color-bg-alt: #f8faf9;
  --color-bg-accent: #f0f7f4;
  --color-border: #e2e8e5;
  --color-border-light: #eef1ef;
  --color-tag-injection-bg: #e8f4f0;
  --color-tag-injection-text: #1a6b52;
  --color-tag-tablet-bg: #fef3e2;
  --color-tag-tablet-text: #8a5a1e;
  --color-warning: #d4763c;
  --color-danger: #c0392b;
  --font-heading: 'Source Serif 4', Georgia, serif;
  --font-body: 'DM Sans', sans-serif;
  --max-width-article: 780px;
  --max-width-wide: 960px;
  --max-width-full: 1100px;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-body);
  background: var(--color-bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  line-height: 1.25;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 0.6em;
}

h2 {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 700;
  margin-top: 2em;
  margin-bottom: 0.5em;
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.3rem);
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: 0.4em;
}

p {
  margin-bottom: 1.15em;
}

/* --- Header --- */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width-full);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-heading);
  text-decoration: none;
  white-space: nowrap;
}

.site-logo:hover {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: color 0.2s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-heading);
  margin: 5px 0;
  transition: all 0.3s;
  border-radius: 1px;
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
    font-size: 0.95rem;
  }
}

/* --- Footer --- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  padding: 48px 24px 32px;
}

.footer-inner {
  max-width: var(--max-width-full);
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.footer-about {
  max-width: 420px;
}

.footer-about .site-logo {
  display: inline-block;
  margin-bottom: 12px;
}

.footer-about p {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.65;
}

.footer-nav {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-nav-group h4 {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-label);
  margin-bottom: 12px;
}

.footer-nav-group ul {
  list-style: none;
}

.footer-nav-group li {
  margin-bottom: 8px;
}

.footer-nav-group a {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.footer-nav-group a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.78rem;
  color: var(--color-light-text);
  margin: 0;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-bottom-links a {
  font-size: 0.78rem;
  color: var(--color-light-text);
}

.footer-bottom-links a:hover {
  color: var(--color-primary);
}

/* --- Layout Utilities --- */
.container {
  max-width: var(--max-width-article);
  margin: 0 auto;
  padding: 0 24px;
}

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

.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--color-bg-alt);
  padding: 64px 0;
}

/* --- Hero --- */
.hero {
  text-align: center;
  padding: 80px 24px 64px;
  max-width: 680px;
  margin: 0 auto;
}

.hero-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.hero h1 {
  margin-bottom: 16px;
}

.hero p {
  font-size: 1.05rem;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 540px;
  margin: 0 auto 32px;
}

.hero-ctas {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 14px 28px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  letter-spacing: 0.01em;
}

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

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

.btn-outline {
  background: transparent;
  color: var(--color-muted);
  border: 2px solid var(--color-border);
}

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

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 28px 24px;
  transition: border-color 0.2s, box-shadow 0.2s;
  text-decoration: none;
  display: block;
  color: inherit;
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(26, 46, 37, 0.06);
  color: inherit;
}

.card-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.card h3 {
  margin-top: 0;
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.card p {
  font-size: 0.88rem;
  color: var(--color-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

.card-arrow {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* --- Blog Article Cards --- */
.article-card {
  border-bottom: 1px solid var(--color-border-light);
  padding: 24px 0;
  display: block;
  text-decoration: none;
  color: inherit;
}

.article-card:first-child {
  padding-top: 0;
}

.article-card:last-child {
  border-bottom: none;
}

.article-card:hover h3 {
  color: var(--color-primary);
}

.article-card .tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 6px;
  display: inline-block;
}

.article-card h3 {
  font-size: 1.05rem;
  margin: 0 0 6px 0;
  transition: color 0.2s;
}

.article-card p {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: 0;
  line-height: 1.6;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  font-size: 0.78rem;
  color: var(--color-light-text);
  margin-bottom: 24px;
  padding-top: 24px;
}

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

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

.breadcrumbs span {
  margin: 0 6px;
}

/* --- Article Page --- */
.article-header {
  margin-bottom: 32px;
}

.article-meta {
  font-size: 0.82rem;
  color: var(--color-light-text);
  margin-bottom: 4px;
}

.article-body h2 {
  margin-top: 2.2em;
}

.article-body ul,
.article-body ol {
  margin-bottom: 1.15em;
  padding-left: 1.5em;
}

.article-body li {
  margin-bottom: 0.4em;
}

.article-body sup a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.75em;
}

/* --- Key Takeaways Box --- */
.key-takeaways {
  background: var(--color-bg-accent);
  border: 1px solid #d4e8df;
  border-radius: 10px;
  padding: 24px 28px;
  margin-bottom: 32px;
}

.key-takeaways h3 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0 0 12px 0;
}

.key-takeaways ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.key-takeaways li {
  font-size: 0.9rem;
  color: var(--color-body);
  padding: 6px 0 6px 20px;
  position: relative;
  line-height: 1.55;
}

.key-takeaways li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.85rem;
}

/* --- Sources Section --- */
.sources {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.sources h3 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-label);
  margin: 0 0 16px 0;
}

.sources ol {
  padding-left: 1.2em;
  margin: 0;
}

.sources li {
  font-size: 0.8rem;
  color: var(--color-light-text);
  margin-bottom: 8px;
  line-height: 1.5;
  word-break: break-word;
}

.sources a {
  color: var(--color-primary);
}

/* --- Disclaimer --- */
.disclaimer {
  background: var(--color-bg-alt);
  border-radius: 8px;
  padding: 20px 24px;
  margin-top: 32px;
  font-size: 0.82rem;
  color: var(--color-light-text);
  line-height: 1.6;
}

/* --- Trust Strip --- */
.trust-strip {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.trust-strip p {
  font-size: 0.82rem;
  color: var(--color-light-text);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-bg-accent) 0%, #e8f4f0 100%);
  border: 1px solid #d4e8df;
  border-radius: 10px;
  padding: 40px;
  text-align: center;
}

.cta-banner h2 {
  margin-top: 0;
  font-size: 1.4rem;
}

.cta-banner p {
  color: var(--color-muted);
  max-width: 480px;
  margin: 0 auto 20px;
}

/* --- Tags / Badges --- */
.tag-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 3px;
}

.tag-injection {
  background: var(--color-tag-injection-bg);
  color: var(--color-tag-injection-text);
}

.tag-tablet {
  background: var(--color-tag-tablet-bg);
  color: var(--color-tag-tablet-text);
}

/* --- Simple Page (About, Privacy, etc.) --- */
.simple-page {
  padding: 48px 0 80px;
}

.simple-page h1 {
  margin-bottom: 24px;
}

.simple-page h2 {
  font-size: 1.2rem;
  margin-top: 2em;
}

.simple-page p,
.simple-page li {
  font-size: 0.95rem;
  line-height: 1.75;
}

.simple-page ul {
  padding-left: 1.4em;
  margin-bottom: 1.15em;
}

.simple-page li {
  margin-bottom: 0.4em;
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .hero {
    padding: 48px 20px 40px;
  }

  .section {
    padding: 40px 0;
  }

  .section-alt {
    padding: 40px 0;
  }

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

  .footer-top {
    flex-direction: column;
  }

  .footer-nav {
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta-banner {
    padding: 28px 20px;
  }
}