/* ==========================================================================
   Guia Plantas Medicinais — Pure CSS Theme
   Natural green/herbal/earth tones, WCAG AA, responsive 320-1440px
   ========================================================================== */

/* Custom Properties */
:root {
  --color-primary: #2d6a4f;
  --color-primary-dark: #1b4332;
  --color-primary-light: #40916c;
  --color-secondary: #95d5b2;
  --color-accent: #d4a373;
  --color-accent-dark: #b5835a;
  --color-bg: #fefae0;
  --color-bg-alt: #f0ead2;
  --color-surface: #ffffff;
  --color-text: #2b2b2b;
  --color-text-light: #555555;
  --color-text-muted: #6b705c;
  --color-border: #d4d4aa;
  --color-link: #1b6b3a;
  --color-link-hover: #14532d;
  --color-footer-bg: #1b4332;
  --color-footer-text: #d8f3dc;
  --color-disclaimer-bg: #fff3cd;
  --color-disclaimer-border: #ffc107;
  --color-disclaimer-text: #664d03;
  --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-size-base: 1rem;
  --line-height-body: 1.7;
  --max-width: 1200px;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #52b788;
    --color-primary-dark: #74c69d;
    --color-primary-light: #40916c;
    --color-secondary: #2d6a4f;
    --color-accent: #ddb892;
    --color-bg: #1a1a2e;
    --color-bg-alt: #16213e;
    --color-surface: #0f3460;
    --color-text: #e8e8e8;
    --color-text-light: #c0c0c0;
    --color-text-muted: #a0a0a0;
    --color-border: #3a3a5c;
    --color-link: #74c69d;
    --color-link-hover: #95d5b2;
    --color-footer-bg: #0d1b2a;
    --color-footer-text: #d8f3dc;
    --color-disclaimer-bg: #3d2e00;
    --color-disclaimer-border: #ffc107;
    --color-disclaimer-text: #ffe69c;
  }
}

[data-theme="dark"] {
  --color-primary: #52b788;
  --color-primary-dark: #74c69d;
  --color-primary-light: #40916c;
  --color-secondary: #2d6a4f;
  --color-accent: #ddb892;
  --color-bg: #1a1a2e;
  --color-bg-alt: #16213e;
  --color-surface: #0f3460;
  --color-text: #e8e8e8;
  --color-text-light: #c0c0c0;
  --color-text-muted: #a0a0a0;
  --color-border: #3a3a5c;
  --color-link: #74c69d;
  --color-link-hover: #95d5b2;
  --color-footer-bg: #0d1b2a;
  --color-footer-text: #d8f3dc;
  --color-disclaimer-bg: #3d2e00;
  --color-disclaimer-border: #ffc107;
  --color-disclaimer-text: #ffe69c;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-link); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-link-hover); text-decoration: underline; }

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary-dark);
  line-height: 1.3;
  margin-bottom: 0.5em;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.3rem; }

p { margin-bottom: 1em; }

/* Container */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 3px solid var(--color-primary);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

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

.site-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.site-logo:hover { text-decoration: none; color: var(--color-primary); }
.site-logo .logo-icon { font-size: 1.8rem; }

.main-nav ul { display: flex; list-style: none; gap: 0.25rem; flex-wrap: wrap; }
.main-nav a {
  display: block;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  color: var(--color-text);
  font-weight: 500;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  transition: background var(--transition), color var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  background: var(--color-primary);
  color: #fff;
  text-decoration: none;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 1.5rem;
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
}

@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .main-nav ul { display: none; flex-direction: column; width: 100%; }
  .main-nav.open ul { display: flex; }
  .main-nav a { justify-content: center; }
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.2rem;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition);
}
.theme-toggle:hover { border-color: var(--color-primary); }

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-light));
  color: #fff;
  padding: 4rem 0;
  text-align: center;
}
.hero h1 { color: #fff; font-size: 2.4rem; margin-bottom: 0.75rem; }
.hero p { font-size: 1.2rem; opacity: 0.95; max-width: 700px; margin: 0 auto 2rem; }

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}
.hero-stat { text-align: center; }
.hero-stat .stat-number { font-size: 2.5rem; font-weight: 700; display: block; }
.hero-stat .stat-label { font-size: 0.9rem; opacity: 0.85; }

/* Breadcrumbs */
.breadcrumbs {
  padding: 0.75rem 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}
.breadcrumbs a { color: var(--color-link); }
.breadcrumbs span { margin: 0 0.4rem; }

/* Cards Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  padding: 2rem 0;
}

.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.card h3 { margin-bottom: 0.5rem; }
.card h3 a { color: var(--color-primary-dark); }
.card h3 a:hover { color: var(--color-primary); text-decoration: none; }
.card p { color: var(--color-text-light); font-size: 0.95rem; }
.card .card-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  min-height: 44px;
  transition: background var(--transition), transform var(--transition);
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }

.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-primary);
  border: 2px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: #fff; }

/* Content */
.content-wrap { padding: 2rem 0; }
.page-title { margin-bottom: 1.5rem; padding-bottom: 0.75rem; border-bottom: 2px solid var(--color-border); }

.article-content { max-width: 800px; }
.article-content h2 { margin-top: 2rem; }
.article-content h3 { margin-top: 1.5rem; }
.article-content ul, .article-content ol { margin: 1rem 0 1rem 1.5rem; }
.article-content li { margin-bottom: 0.5rem; }
.article-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* Article Meta */
.article-meta {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

/* Health Disclaimer */
.health-disclaimer {
  background: var(--color-disclaimer-bg);
  border-left: 4px solid var(--color-disclaimer-border);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  font-size: 0.9rem;
  color: var(--color-disclaimer-text);
}
.health-disclaimer strong { display: block; margin-bottom: 0.25rem; }

/* Glossary */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}
.glossary-item {
  background: var(--color-surface);
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.glossary-item:hover { border-color: var(--color-primary); box-shadow: var(--shadow-hover); }
.glossary-item h3 { font-size: 1.1rem; margin-bottom: 0.25rem; }
.glossary-item .scientific-name { font-style: italic; color: var(--color-text-muted); font-size: 0.9rem; }
.glossary-item p { font-size: 0.9rem; color: var(--color-text-light); margin-top: 0.5rem; }

/* FAQ */
.faq-list { max-width: 800px; }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  overflow: hidden;
}
.faq-item summary {
  padding: 1rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
  display: flex;
  align-items: center;
  list-style: none;
  transition: background var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before { content: "+"; margin-right: 1rem; font-size: 1.3rem; color: var(--color-primary); font-weight: 700; }
.faq-item[open] summary::before { content: "−"; }
.faq-item summary:hover { background: var(--color-bg-alt); }
.faq-item .faq-answer { padding: 0 1.5rem 1rem; }

/* Section Headings */
.section-title {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.75rem;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* Tags */
.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  border-radius: 4px;
  font-size: 0.8rem;
  margin-right: 0.3rem;
}

/* Footer */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 3rem 0 1.5rem;
  margin-top: 3rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-col h4 { color: #fff; margin-bottom: 1rem; font-size: 1.1rem; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a { color: var(--color-footer-text); opacity: 0.85; transition: opacity var(--transition); }
.footer-col a:hover { opacity: 1; color: #fff; text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.7;
}

/* Portfolio Footer */
.portfolio-footer {
  background: rgba(0,0,0,0.15);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-top: 1rem;
}
.portfolio-footer h4 { color: #fff; margin-bottom: 0.75rem; }
.portfolio-links { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.portfolio-links a {
  color: var(--color-secondary);
  font-size: 0.9rem;
  padding: 0.3rem 0.6rem;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 4px;
  transition: all var(--transition);
}
.portfolio-links a:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.4); text-decoration: none; }

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 2rem 0;
  flex-wrap: wrap;
}
.pagination a, .pagination span {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pagination a:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); text-decoration: none; }
.pagination .active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* Reading Time */
.reading-time { color: var(--color-text-muted); font-size: 0.9rem; }

/* Table of Contents */
.toc {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 2rem;
}
.toc h4 { margin-bottom: 0.75rem; font-size: 1rem; }
.toc ul { list-style: none; padding-left: 0; }
.toc li { margin-bottom: 0.4rem; }
.toc a { font-size: 0.9rem; }

/* Utility */
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }

/* Responsive */
@media (max-width: 768px) {
  .hero { padding: 2.5rem 0; }
  .hero h1 { font-size: 1.8rem; }
  .hero-stats { gap: 1.5rem; }
  .hero-stat .stat-number { font-size: 2rem; }
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.4rem; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 375px) {
  .container { padding: 0 1rem; }
  .hero h1 { font-size: 1.5rem; }
  .card { padding: 1rem; }
}

/* Print */
@media print {
  .site-header, .site-footer, .main-nav, .theme-toggle, .breadcrumbs { display: none; }
  body { color: #000; background: #fff; }
  a { color: #000; text-decoration: underline; }
}