/* =========================================================
   طراحی سایت | Design System
   فهرست: Reset, Tokens, Typography, Layout, Components,
   Header/Nav, Footer, Pages (Home/About/Services/Blog/Contact),
   Animations, Responsive, Accessibility & Utilities
   ========================================================= */

/* ---------- 1. Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, picture, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select, button { font: inherit; color: inherit; }
table { border-collapse: collapse; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------- 2. Design Tokens ---------- */
:root {
  /* Brand palette: deep blue (primary) + warm orange (accent) on neutral surfaces */
  --color-primary: #0f4c81;
  --color-primary-dark: #0a3a63;
  --color-primary-light: #e8f1fb;
  --color-accent: #f4762a;
  --color-accent-dark: #d9611a;
  --color-accent-light: #fef0e6;

  --color-ink: #16202c;
  --color-body: #4a5568;
  --color-muted: #7c8a9c;
  --color-bg: #ffffff;
  --color-bg-alt: #f5f8fc;
  --color-border: #e3e8f0;

  --color-success: #1f9d55;
  --color-danger: #e3402b;

  --font-family: "Vazirmatn", "Tahoma", sans-serif;

  --container-width: 1220px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;

  --shadow-sm: 0 2px 8px rgba(16, 34, 60, 0.06);
  --shadow-md: 0 12px 28px rgba(16, 34, 60, 0.10);
  --shadow-lg: 0 24px 48px rgba(16, 34, 60, 0.14);

  --header-height: 76px;
  --transition: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 3. Typography ---------- */
html { font-size: 16px; }
body {
  font-family: var(--font-family);
  color: var(--color-body);
  background: var(--color-bg);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  color: var(--color-ink);
  font-weight: 700;
  line-height: 1.4;
}

h1 { font-size: clamp(2rem, 1.4rem + 2.4vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 1.3rem + 1.4vw, 2.4rem); font-weight: 800; }
h3 { font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem); }
h4 { font-size: 1.05rem; }

p { color: var(--color-body); }

.lead { font-size: clamp(1.05rem, 1rem + 0.3vw, 1.25rem); color: var(--color-body); }

/* ---------- 4. Layout Helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: clamp(56px, 6vw, 100px); }
.section-alt { background: var(--color-bg-alt); }

.section-header {
  max-width: 720px;
  margin-bottom: clamp(32px, 4vw, 56px);
}
.section-header.center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-accent-dark);
  background: var(--color-accent-light);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title { margin-bottom: 14px; }
.section-subtitle { color: var(--color-muted); }

.grid { display: grid; gap: 28px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 991px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.98rem;
  border: 2px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }

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

.btn-accent { background: var(--color-accent); color: #fff; box-shadow: var(--shadow-sm); }
.btn-accent:hover { background: var(--color-accent-dark); box-shadow: var(--shadow-md); }

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

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

.btn-block { width: 100%; }
.btn-sm { padding: 9px 20px; font-size: 0.9rem; }

.icon { width: 22px; height: 22px; flex-shrink: 0; }
.icon-sm { width: 17px; height: 17px; }
.icon-lg { width: 34px; height: 34px; }

/* ---------- 6. Header & Navigation ---------- */
.skip-link {
  position: absolute;
  right: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  z-index: 999;
}
.skip-link:focus { right: 16px; top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-sm);
  border-color: var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.15rem; color: var(--color-ink); }
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
}
.brand-mark .icon { width: 22px; height: 22px; }

.nav-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fff;
  align-items: center;
  justify-content: center;
}
.nav-toggle .icon { position: absolute; transition: opacity var(--transition), transform var(--transition); }
.nav-toggle .icon-close { opacity: 0; transform: rotate(-90deg); }
.nav-toggle[aria-expanded="true"] .icon-open { opacity: 0; transform: rotate(90deg); }
.nav-toggle[aria-expanded="true"] .icon-close { opacity: 1; transform: rotate(0); }

.primary-nav { display: flex; align-items: center; gap: 28px; }
.nav-list { display: flex; align-items: center; gap: 28px; }
.nav-link {
  position: relative;
  font-weight: 600;
  color: var(--color-body);
  padding-block: 8px;
  transition: color var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  right: 0; left: 0; bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--color-primary); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

.nav-cta { flex-shrink: 0; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }
  .primary-nav.is-open { max-height: 70vh; overflow-y: auto; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; padding: 8px 24px; }
  .nav-list li { border-bottom: 1px solid var(--color-border); }
  .nav-list li:last-child { border-bottom: none; }
  .nav-link { display: block; padding: 16px 0; }
  .nav-link::after { display: none; }
  .nav-cta { margin: 16px 24px 24px; }
}

/* ---------- 7. Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(56px, 8vw, 110px);
  background: linear-gradient(180deg, var(--color-primary-light) 0%, #ffffff 65%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
}
.hero-content h1,
.hero-content h2 { margin-bottom: 20px; }
.hero-content p { margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 40px; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 24px; color: var(--color-muted); font-size: 0.92rem; }
.hero-trust li { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.hero-trust .icon { color: var(--color-success); }

.hero-media { position: relative; }
.hero-media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  aspect-ratio: 4/3.1;
  object-fit: cover;
}
.hero-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}
.hero-badge .icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

@media (max-width: 991px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-actions, .hero-trust { justify-content: center; }
  .hero-media { max-width: 480px; margin-inline: auto; }
  .hero-badge { position: static; margin-top: 20px; justify-content: center; }
}

/* ---------- 8. Cards ---------- */
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

.service-card { padding: 32px 28px; display: flex; flex-direction: column; height: 100%; }
.service-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-primary);
  margin-bottom: 20px;
}
.service-card h3 { margin-bottom: 10px; }
.service-card p { margin-bottom: 20px; flex-grow: 1; }
.service-card-link { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--color-primary); }
.service-card-link .icon { transition: transform var(--transition); }
.service-card-link:hover .icon { transform: translateX(-4px); }

.service-detail-card { display: flex; flex-direction: column; }
.service-detail-card img { aspect-ratio: 4/3; object-fit: cover; }
.service-detail-card .service-card { flex-grow: 1; }

.portfolio-card { position: relative; border-radius: var(--radius-md); overflow: hidden; }
.portfolio-card img { aspect-ratio: 4/3; object-fit: cover; transition: transform 400ms ease; }
.portfolio-card:hover img { transform: scale(1.06); }
.portfolio-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,76,129,0) 40%, rgba(11,32,52,0.86) 100%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 24px;
  color: #fff;
}
.portfolio-overlay .badge { align-self: flex-start; margin-bottom: 10px; }
.portfolio-overlay h3 { color: #fff; margin-bottom: 6px; font-size: 1.1rem; }
.portfolio-overlay p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin: 0; }

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

.testimonial-card { padding: 32px; display: flex; flex-direction: column; height: 100%; }
.testimonial-quote-icon { color: var(--color-primary-light); margin-bottom: 12px; }
.testimonial-quote-icon .icon { width: 34px; height: 34px; }
.testimonial-rating { display: flex; gap: 3px; color: var(--color-accent); margin-bottom: 14px; }
.testimonial-rating .icon { width: 17px; height: 17px; }
.testimonial-text { flex-grow: 1; margin-bottom: 24px; color: var(--color-ink); }
.testimonial-author { display: flex; align-items: center; gap: 14px; }
.testimonial-author img { width: 50px; height: 50px; border-radius: 50%; object-fit: cover; }
.testimonial-author strong { display: block; color: var(--color-ink); }
.testimonial-author span { font-size: 0.85rem; color: var(--color-muted); }

.stat-card { text-align: center; padding: 30px 20px; }
.stat-card .icon-wrap {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--color-primary-light); color: var(--color-primary);
  margin-bottom: 16px;
}
.stat-value { font-size: clamp(2rem, 1.6rem + 1vw, 2.6rem); font-weight: 800; color: var(--color-primary); }
.stat-label { color: var(--color-muted); font-weight: 600; margin-top: 6px; }

.value-card { padding: 30px; }
.value-card .service-card-icon { background: var(--color-accent-light); color: var(--color-accent-dark); }

.team-card { text-align: center; overflow: hidden; }
.team-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.team-card-body { padding: 22px; }
.team-card-body h3 { margin-bottom: 4px; font-size: 1.05rem; }
.team-card-body span { color: var(--color-muted); font-size: 0.9rem; }
.team-social { display: flex; justify-content: center; gap: 12px; margin-top: 14px; }
.team-social a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--color-bg-alt); color: var(--color-primary);
  transition: background var(--transition), color var(--transition);
}
.team-social a:hover { background: var(--color-primary); color: #fff; }
.team-social .icon { width: 16px; height: 16px; }

.blog-card { display: flex; flex-direction: column; height: 100%; }
.blog-card img { aspect-ratio: 16/10; object-fit: cover; }
.blog-card-body { padding: 26px; display: flex; flex-direction: column; flex-grow: 1; }
.blog-meta { display: flex; align-items: center; gap: 14px; font-size: 0.85rem; color: var(--color-muted); margin-bottom: 12px; flex-wrap: wrap; }
.blog-meta li { display: flex; align-items: center; gap: 6px; }
.blog-card-body h3 { margin-bottom: 10px; flex-grow: 0; }
.blog-card-body p { margin-bottom: 20px; flex-grow: 1; }

/* ---------- 9. Forms ---------- */
.form-group { margin-bottom: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 620px) { .form-row { grid-template-columns: 1fr; } }

.form-label { display: block; font-weight: 700; color: var(--color-ink); margin-bottom: 8px; font-size: 0.94rem; }
.form-control {
  width: 100%;
  padding: 13px 18px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: #fff;
  font-size: 0.98rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}
textarea.form-control { resize: vertical; min-height: 140px; }

.field-error, .text-danger {
  display: block;
  color: var(--color-danger);
  font-size: 0.85rem;
  margin-top: 6px;
}
.form-control.input-invalid { border-color: var(--color-danger); }

.form-alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  font-weight: 600;
}
.form-alert.success { background: #eafaf0; color: #146c39; }
.form-alert.error { background: #fdecea; color: #a5261a; }

/* ---------- 10. Newsletter / CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: clamp(36px, 5vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2, .cta-band p { color: #fff; }
.cta-band p { color: rgba(255,255,255,0.85); }
.newsletter-form { display: flex; gap: 10px; flex-wrap: wrap; min-width: 320px; flex-grow: 1; max-width: 480px; }
.newsletter-form input {
  flex-grow: 1;
  padding: 13px 18px;
  border-radius: var(--radius-full);
  border: none;
  min-width: 200px;
}
.newsletter-form input:focus { outline: 3px solid rgba(255,255,255,0.5); }

/* ---------- 11. Footer ---------- */
.site-footer { background: #0d2136; color: rgba(255,255,255,0.78); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-block: 64px 40px;
}
.footer-col .brand-name, .footer-col a { color: rgba(255,255,255,0.85); }
.brand-footer { color: #fff; margin-bottom: 16px; }
.brand-footer .brand-mark { background: var(--color-accent); }
.footer-about p { color: rgba(255,255,255,0.65); max-width: 320px; margin-bottom: 22px; }
.footer-title { color: #fff; font-size: 1.02rem; margin-bottom: 20px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a:hover, .social-list a:hover { color: var(--color-accent); }
.footer-contact { display: flex; flex-direction: column; gap: 16px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; color: rgba(255,255,255,0.72); }
.footer-contact .icon { color: var(--color-accent); margin-top: 3px; }
.social-list { display: flex; gap: 12px; }
.social-list a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  transition: background var(--transition), color var(--transition);
}
.social-list .icon { width: 17px; height: 17px; }
.social-list a:hover { background: var(--color-accent); color: #fff; }

.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); }
.footer-bottom-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: 20px; flex-wrap: wrap; gap: 12px;
  font-size: 0.88rem; color: rgba(255,255,255,0.55);
}
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a:hover { color: var(--color-accent); }

@media (max-width: 991px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .footer-grid { grid-template-columns: 1fr; text-align: right; }
}

/* ---------- 12. Back to top ---------- */
.back-to-top {
  position: fixed;
  bottom: 28px;
  left: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 400;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-primary-dark); }

/* ---------- 13. Reveal animation on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 90ms; }
.reveal-delay-2 { transition-delay: 180ms; }
.reveal-delay-3 { transition-delay: 270ms; }

/* ---------- 14. Page-specific: About ---------- */
.about-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-hero img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); aspect-ratio: 4/3.3; object-fit: cover; }
@media (max-width: 900px) { .about-hero { grid-template-columns: 1fr; } }

.mission-list { display: flex; flex-direction: column; gap: 16px; margin-top: 24px; }
.mission-list li { display: flex; align-items: flex-start; gap: 12px; font-weight: 600; color: var(--color-ink); }
.mission-list .icon { color: var(--color-success); margin-top: 3px; flex-shrink: 0; }

/* ---------- 15. Page-specific: Blog Details ---------- */
.blog-hero-image { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 32px; box-shadow: var(--shadow-md); }
.blog-hero-image img { aspect-ratio: 16/8; object-fit: cover; }
.article-body { max-width: 760px; margin-inline: auto; }
.article-body p { margin-bottom: 22px; font-size: 1.05rem; }
.article-header { max-width: 760px; margin-inline: auto; text-align: center; margin-bottom: 36px; }
.article-header .blog-meta { justify-content: center; margin-bottom: 18px; }
.related-posts-title { text-align: center; margin-bottom: 32px; }

/* ---------- 16. Page-specific: Contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: start; }
@media (max-width: 991px) { .contact-layout { grid-template-columns: 1fr; } }
.contact-info-card { background: var(--color-bg-alt); border-radius: var(--radius-md); padding: 32px; margin-bottom: 24px; }
.contact-info-list { display: flex; flex-direction: column; gap: 20px; margin-top: 20px; }
.contact-info-list li { display: flex; align-items: flex-start; gap: 14px; }
.contact-info-list .icon-wrap {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  background: var(--color-primary-light); color: var(--color-primary); flex-shrink: 0;
}
.contact-info-list strong { display: block; color: var(--color-ink); margin-bottom: 2px; }
.map-frame { border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); }
.map-frame iframe { width: 100%; height: 320px; border: none; display: block; }

/* ---------- 17. Filters (Blog) ---------- */
.filter-list { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.filter-chip {
  padding: 9px 20px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-body);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.filter-chip:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-chip.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ---------- 18. Page header banner (Services/Blog/About/Contact top) ---------- */
.page-header {
  background: linear-gradient(120deg, var(--color-primary-light) 0%, #fff 100%);
  padding-block: clamp(48px, 6vw, 84px);
  text-align: center;
}
.page-header h1 { margin-bottom: 14px; }
.breadcrumb { display: flex; justify-content: center; gap: 8px; color: var(--color-muted); font-size: 0.9rem; margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--color-primary); }

/* ---------- 19. Utilities ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0 !important; }
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}
.empty-state { text-align: center; padding: 60px 20px; color: var(--color-muted); }

/* Focus visibility across interactive elements for keyboard navigation */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}