/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  min-height: 44px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  gap: 8px;
}

.btn-primary {
  background-color: var(--color-green-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-green-mid);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--color-green-primary);
  color: var(--color-green-primary);
}

.btn-outline:hover {
  background-color: var(--color-green-primary);
  color: var(--color-white);
}

.btn-outline-white {
  background-color: transparent;
  border: 1px solid var(--color-white);
  color: var(--color-white);
}

.btn-outline-white:hover {
  background-color: var(--color-white);
  color: var(--color-green-primary);
}

.btn-full {
  width: 100%;
}

/* Cards */
.card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--card-radius);
  padding: 24px;
  height: 100%;
  box-shadow: var(--card-shadow);
  transition:
    transform 0.3s ease,
    border-color 0.3s ease,
    box-shadow 0.3s ease;
}

.card:hover {
  border-color: var(--color-green-light);
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

/* Card Consistency (non-.card components) */
.feature-card,
.aqi-card,
.article-card,
.article-item,
.widget-card,
.value-item,
.contact-card,
.pillar-card,
.team-card,
.faq-item,
.sidebar-card,
.feed-card,
.modal-card,
.result-found-card,
.result-not-found-card {
  border-radius: var(--card-radius) !important;
  box-shadow: var(--card-shadow) !important;
}

.feature-card:hover,
.article-card:hover,
.article-item:hover,
.contact-card:hover,
.pillar-card:hover,
.team-card:hover {
  box-shadow: var(--card-shadow-hover);
}

/* Card Typography Hierarchy */
.card h3,
.feature-card h3,
.article-card h3,
.widget-card h3,
.team-card h3,
.faq-toggle,
.sidebar-title {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card h4,
.contact-card h4,
.pillar-card h4,
.article-content-small h4 {
  font-weight: 600;
}

.card p,
.feature-card p,
.article-item p,
.widget-card p,
.contact-card p,
.team-card p,
.faq-content p,
.widget-note {
  font-weight: 400;
  line-height: 1.6;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg-primary);
  padding: 20px 0;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 15px 0;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  font-weight: 700;
  font-size: 24px;
  color: var(--color-green-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-brand i,
.widget-head i,
.feature-head i,
.icon-box i,
.cta-link i,
.hero-head .btn i {
  color: var(--color-green-primary);
}

.nav-menu {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-green-primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-green-primary);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: all 0.3s ease;
}

/* Mobile Menu Drawer */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--color-bg-primary);
  padding: 80px 20px 40px;
  z-index: 999;
  transform: translateY(-100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  max-height: 100vh;
  overflow-y: auto;
}

.mobile-menu.active {
  transform: translateY(0);
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
  text-align: center;
}

.mobile-nav-link {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Quick Start CTA Overlay */
.quick-start-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease;
  z-index: 1100;
}

.quick-start-overlay.active {
  opacity: 1;
  visibility: visible;
}

.quick-start-sheet {
  width: min(520px, 100%);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 22px;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.16);
}

.quick-start-sheet h3 {
  margin: 0 0 8px;
  font-size: 24px;
}

.quick-start-sheet p {
  margin: 0 0 16px;
  color: var(--color-text-secondary);
}

.quick-start-actions {
  display: grid;
  gap: 10px;
}

.quick-start-close {
  margin-top: 14px;
  border: 0;
  background: transparent;
  color: var(--color-text-muted);
  font: inherit;
  cursor: pointer;
  padding: 4px 0;
}

.quick-start-close:hover {
  color: var(--color-text-primary);
}

/* Footer */
.footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  padding: 60px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  color: var(--color-white);
  font-size: 24px;
  margin-bottom: 10px;
}

.footer-tagline {
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

.footer-heading {
  color: var(--color-white);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 12px;
}

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

.footer-links a:hover {
  color: var(--color-green-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 14px;
}

/* Scroll to top */
.scroll-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  background-color: var(--color-green-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 900;
  border: none;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .btn {
    width: 100%;
  }

  .card {
    padding: 20px;
  }

  .card:hover,
  .feature-card:hover,
  .article-card:hover,
  .article-item:hover,
  .contact-card:hover,
  .pillar-card:hover,
  .team-card:hover {
    transform: none;
    box-shadow: var(--card-shadow);
  }

  .nav-brand {
    font-size: 22px;
  }
}

/* Forms (Standardized) */
.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  width: 100%;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-white);
  font-family: inherit;
  font-size: 16px;
  color: var(--color-text-primary);
  transition: all 0.3s ease;
  resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-green-primary);
  box-shadow: 0 0 0 3px rgba(45, 90, 39, 0.1);
}