:root {
  --primary: #0f766e;
  --primary-dark: #115e59;
  --primary-light: #ccfbf1;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --bg: #fafaf9;
  --surface: #ffffff;
  --text: #1c1917;
  --text-secondary: #57534e;
  --muted: #a8a29e;
  --border: #e7e5e4;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --radius: 12px;
  --max-width: 1100px;
  --header-height: 64px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

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

a:hover {
  text-decoration: underline;
}

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

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 200;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
  white-space: nowrap;
}

.logo-icon {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.logo:hover {
  text-decoration: none;
}

.desktop-nav {
  display: none;
}

.desktop-nav a {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0.25rem;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"] {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 2px solid var(--primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.search-form {
  display: none;
  align-items: center;
  gap: 0.25rem;
  position: relative;
}

.search-form input {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  font-size: 0.9rem;
  width: 160px;
  background: var(--bg);
}

.search-form button {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
}

.menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-toggle svg {
  width: 28px;
  height: 28px;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  flex-direction: column;
  padding: 0.75rem 1rem;
  gap: 0.25rem;
}

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

.mobile-nav a {
  padding: 0.75rem 0.5rem;
  color: var(--text);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

.mobile-nav a[aria-current="page"] {
  color: var(--primary);
}

.mobile-search {
  display: block;
  margin-top: 0.5rem;
}

.mobile-search input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.6rem 1rem;
  font-size: 1rem;
}

.mobile-search button {
  display: none;
}

/* Main */
main {
  min-height: 60vh;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 3rem 0;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  margin: 0 0 1rem;
  line-height: 1.2;
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  margin: 0 auto;
  max-width: 680px;
  opacity: 0.92;
}

.hero-actions {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: background 0.2s, transform 0.1s;
}

.btn-primary {
  background: var(--accent);
  color: #1f2937;
}

.btn-primary:hover {
  background: var(--accent-dark);
  text-decoration: none;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  text-decoration: none;
}

/* Sections */
.section {
  padding: 2.5rem 0;
}

.section-alt {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  margin-bottom: 1.5rem;
}

.section-header h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  margin: 0 0 0.5rem;
  color: var(--text);
}

.section-header p {
  color: var(--text-secondary);
  margin: 0;
  max-width: 640px;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.06);
}

.card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-image svg {
  width: 48px;
  height: 48px;
  color: var(--primary);
}

.card-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.card-category {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: 0.7rem;
}

.card h3 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  color: var(--text);
  line-height: 1.3;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0 0 1rem;
  flex: 1;
}

.card-link {
  font-weight: 700;
  font-size: 0.95rem;
}

/* Categories */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.category-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  font-weight: 700;
  transition: border-color 0.2s, transform 0.2s;
}

.category-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  text-decoration: none;
}

.category-card svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

/* Tips */
.tip-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.tip-card {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 1rem;
}

.tip-card h4 {
  margin: 0 0 0.35rem;
  color: var(--primary-dark);
  font-size: 1rem;
}

.tip-card p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Article page */
.article-header {
  padding: 2.5rem 0 1.5rem;
}

.article-header h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  margin: 0 0 1rem;
  line-height: 1.25;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.article-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--primary-light);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1rem;
}

.article-content h2 {
  font-size: 1.5rem;
  color: var(--primary-dark);
  margin: 2rem 0 0.75rem;
}

.article-content h3 {
  font-size: 1.2rem;
  color: var(--text);
  margin: 1.5rem 0 0.5rem;
}

.article-content p,
.article-content ul,
.article-content ol {
  color: var(--text-secondary);
  margin: 0 0 1rem;
}

.article-content ul,
.article-content ol {
  padding-left: 1.25rem;
}

.article-content li {
  margin-bottom: 0.35rem;
}

/* Disclaimer */
.disclaimer {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem;
  margin: 1.5rem 0;
  color: #7c2d12;
  font-size: 0.95rem;
}

.disclaimer strong {
  color: #9a3412;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.breadcrumb a {
  color: var(--text-secondary);
}

/* Category page header */
.category-hero {
  background: var(--primary-light);
  padding: 2rem 0;
  text-align: center;
}

.category-hero h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  margin: 0 0 0.5rem;
  color: var(--primary-dark);
}

.category-hero p {
  color: var(--text-secondary);
  margin: 0 auto;
  max-width: 600px;
}

/* Page layout */
.page-header {
  background: var(--primary-light);
  padding: 2.5rem 0;
  text-align: center;
}

.page-header h1 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  margin: 0 0 0.5rem;
  color: var(--primary-dark);
}

.page-header p {
  color: var(--text-secondary);
  margin: 0 auto;
  max-width: 640px;
}

.page-content {
  padding: 2rem 0;
  max-width: 720px;
  margin: 0 auto;
}

.page-content h2 {
  color: var(--primary-dark);
  margin: 1.75rem 0 0.75rem;
  font-size: 1.4rem;
}

.page-content p,
.page-content ul {
  color: var(--text-secondary);
  margin: 0 0 1rem;
}

.page-content ul {
  padding-left: 1.25rem;
}

.page-content address {
  font-style: normal;
  color: var(--text-secondary);
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem;
  font-size: 1rem;
  background: var(--surface);
  font-family: inherit;
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

/* Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2rem 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.footer-brand {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.footer-links h4 {
  font-size: 0.95rem;
  margin: 0 0 0.5rem;
  color: var(--text);
}

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

.footer-links li {
  margin-bottom: 0.25rem;
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
}

/* Utilities */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* 404 */
.error-page {
  text-align: center;
  padding: 4rem 0;
}

.error-page h1 {
  font-size: 4rem;
  color: var(--primary);
  margin: 0;
}

.error-page p {
  color: var(--text-secondary);
  margin: 1rem 0;
}

/* Responsive */
@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .category-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .tip-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
  }

  .search-form {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }

  .mobile-nav {
    display: none !important;
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .article-content {
    padding: 0;
  }
}

@media (max-width: 899px) {
  body.nav-open {
    overflow: hidden;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .card,
  .category-card {
    transition: none;
  }
}