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

html, body {
  width: 100%;
  overflow-x: hidden;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2 {
  font-family: var(--font-display);
  color: var(--color-text);
  font-weight: 400;
  line-height: 1.2;
}

h3, h4, h5, h6 {
  font-family: var(--font-body);
  color: var(--color-text);
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); letter-spacing: -0.005em; }
h3 { font-size: clamp(1.4rem, 3vw, 1.875rem); }
h4 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p {
  font-family: var(--font-body);
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  font-size: 1.125rem;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 5vw, 2rem);
}

.section {
  padding: var(--spacing-xl) 0;
  overflow-x: hidden; /* Phase 9: Clipping AOS and other minor overflows */
}

.section-light  { background-color: var(--color-surface); }
.section-beige  { background-color: var(--color-surface-2); }
.section-dark {
  background-color: var(--color-dark-section);
  color: var(--color-dark-section-text);
}

.section-dark h2,
.section-dark p {
  color: var(--color-dark-section-text);
}

.text-center { text-align: center; }

/* Buttons — Fill-slide-from-left via background-position gradient */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
}

/* Primary — brass fill slides in from left on hover */
.btn-primary {
  background: linear-gradient(90deg, var(--color-accent) 50%, var(--color-primary) 50%);
  background-size: 200% 100%;
  background-position: 100% center;
  color: var(--color-white);
  border: 1px solid var(--color-primary);
  transition: background-position 250ms ease, color 120ms ease, border-color 120ms ease, transform var(--transition-normal), box-shadow var(--transition-normal);
}

.btn-primary:hover {
  background-position: 0% center;
  color: var(--color-text);
  border-color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-elevation);
}

/* Secondary */
.btn-secondary {
  background: linear-gradient(90deg, var(--color-surface-2) 50%, transparent 50%);
  background-size: 200% 100%;
  background-position: 100% center;
  color: var(--color-text);
  border: 1px solid var(--color-surface-offset);
  transition: background-position 250ms ease, color 120ms ease, border-color 120ms ease;
}

.btn-secondary:hover {
  background-position: 0% center;
  border-color: var(--color-accent);
  color: var(--color-text);
}

/* Dark section, CTA strip, and hero panel — transparent brass outline, brass fill on hover */
.section-dark .btn-primary,
.cta-strip .btn-primary,
.hero-panel-text .btn-primary {
  background: linear-gradient(90deg, var(--color-accent) 50%, transparent 50%);
  background-size: 200% 100%;
  background-position: 100% center;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.section-dark .btn-primary:hover,
.cta-strip .btn-primary:hover,
.hero-panel-text .btn-primary:hover {
  background-position: 0% center;
  color: var(--color-charcoal);
  border-color: var(--color-accent);
}

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  padding: 1.5rem 0;
  background-color: rgba(248, 247, 243, 0.95);
  backdrop-filter: blur(8px);
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: padding var(--transition-normal), border var(--transition-normal);
}

.site-header.scrolled {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-surface-offset);
}

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

.logo {
  font-family: var(--font-body);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  min-height: 44px; /* Phase 9: Ensure 44px tap target height */
  min-width: 44px; /* Phase 9: Ensure 44px tap target width */
}

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

.nav-links {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.nav-links a.nav-item {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  padding: 0.25rem 0.5rem; /* Balanced tighter padding */
  min-height: 44px;
  display: inline-flex; /* Ensure height is respected */
  align-items: center;
}

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

/* Nav underline — 1px brass */
.nav-links a.nav-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width 200ms ease;
}

.nav-links a.nav-item:hover::after,
.nav-links a.nav-item.active::after {
  width: 100%;
}

/* No underline on the CTA nav button */
.nav-links a.nav-item.btn::after {
  display: none;
}

/* Nav CTA — solid herbal green, white text */
.nav-links a.nav-item.btn-primary {
  background: var(--color-primary);
  background-image: none;
  background-size: auto;
  background-position: initial;
  color: var(--color-white);
  border: none;
  padding: 0.6rem 1.4rem;
  font-weight: 500;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.nav-links a.nav-item.btn-primary:hover {
  background: var(--color-primary-active);
  background-image: none;
  background-position: initial;
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: none;
  border-color: transparent;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-text);
  /* Fix: ensure 44×44px minimum tap target */
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

/* Footer — deep forest */
.site-footer {
  background-color: #111F18;
  color: var(--color-dark-section-text);
  padding: var(--spacing-xl) 0 2rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-brand .logo {
  color: var(--color-dark-section-text);
  margin-bottom: 1rem;
  display: inline-block;
}

.footer-brand .logo span {
  color: var(--color-accent);
}

.footer-brand p {
  color: rgba(240, 232, 220, 0.6);
  max-width: 300px;
  font-size: 1rem;
}

.footer-title {
  font-family: var(--font-body);
  color: var(--color-dark-section-text);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
  color: rgba(240, 232, 220, 0.75);
  font-family: var(--font-body);
  font-size: 0.95rem;
}

.footer-links a {
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-dark-section-text);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(240, 232, 220, 0.1);
  color: rgba(240, 232, 220, 0.4);
  font-family: var(--font-body);
  font-size: 0.9rem;
}

.developer-credit {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.85rem;
  color: rgba(240, 232, 220, 0.3);
}

/* Floating WhatsApp Button */
.whatsapp-float {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: #25D366;
  color: #FFFFFF;
  padding: 0.85rem 1.25rem;
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.35);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(37, 211, 102, 0.45);
  color: #FFFFFF;
}

/* Skip Navigation Link (accessibility) */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.25rem;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}

/* Visually hidden — accessible to screen readers, invisible to sighted users */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  max-width: 1px; /* Phase 9: prevents scrollWidth overflow in audit */
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  display: block;
  width: 1px;
  height: 1px;
  overflow: hidden; /* Phase 9: strict clipping */
  border: 0;
}

/* Section intro — centred subheading under page/section h2 */
.section-intro {
  max-width: 580px;
  margin: 0.75rem auto 0;
  font-size: 1.2rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* Focus-visible — keyboard navigation ring (WCAG 2.1 AA) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
details summary:focus-visible,
.btn:focus-visible,
.nav-links a.nav-item:focus-visible,
.whatsapp-float:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Responsive */
@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-bg);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 0;
    box-shadow: var(--shadow-elevation);
    border-top: 1px solid var(--color-surface-offset);
  }

  .nav-links a.nav-item {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-surface-offset);
    width: 100%;
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  .nav-links a.nav-item:last-child {
    border-bottom: none;
    margin-top: 0.75rem;
    text-align: center;
  }

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

  .mobile-toggle {
    display: flex;
  }

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

  .whatsapp-float {
    bottom: 1.5rem;
    right: 1.25rem;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
  }

  body {
    padding-bottom: 4.5rem;
  }
}

/* ============================================================
   Phase 9 — Mobile Responsive QA Fixes
   ============================================================ */

/* Fix: footer links — ensure 44px touch area on mobile */
@media (max-width: 900px) {
  .footer-links a {
    display: inline-block;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    min-height: 44px;
    min-width: 44px; /* Phase 9: Ensure width for small links like "Home" */
    line-height: 2.2;
    display: inline-flex;
    align-items: center;
  }
}

/* Fix: section vertical padding — 8rem (128px) is excessive on small screens */
@media (max-width: 600px) {
  .section {
    padding: var(--spacing-lg) 0;
  }
}

/* Phase 9: Inline arrow links — ensure 44px tap target globally */
.card-link,
.svc-strip-link,
.blog-card-link,
.article-back-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}