/* ============================================================
   Tekofis — Kurumsal Tedarik & Bilişim Hizmetleri
   Design System: Trust & Authority (antrasit warm-stone + altın)
   Fonts: Archivo (başlıklar) / Hanken Grotesk (gövde)
   ============================================================ */

/* Marka paleti: Tekofis logosu — siyah/antrasit + altın sarısı.
   Değişken adları (navy-*) tarihsel; değerler warm-stone nötrleri. */
:root {
  --navy-950: #0c0a09;
  --navy-900: #1c1917;
  --navy-800: #292524;
  --navy-700: #44403c;
  --navy-600: #57534e;
  --navy-500: #78716c;
  --navy-400: #a8a29e;
  --navy-300: #d6d3d1;
  --navy-200: #e7e5e4;
  --navy-100: #f5f5f4;
  --navy-50:  #fafaf9;

  --accent-700: #a16207;
  --accent-600: #ca8a04;
  --accent-500: #eab308;
  --accent-100: #fdf3d0;

  --color-primary: var(--navy-900);
  --color-accent: var(--accent-700);
  --color-bg: var(--navy-50);
  --color-surface: #ffffff;
  --color-text: var(--navy-900);
  --color-text-muted: var(--navy-600);
  --color-border: var(--navy-200);

  --font-heading: "Archivo", "Segoe UI", system-ui, sans-serif;
  --font-body: "Hanken Grotesk", "Segoe UI", system-ui, sans-serif;

  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 3px rgba(12, 10, 9, .07);
  --shadow-md: 0 6px 24px rgba(12, 10, 9, .09);
  --shadow-lg: 0 18px 48px rgba(12, 10, 9, .16);
  --container: 1180px;
  --transition: .22s ease;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  margin: 0 0 .5em;
  color: var(--color-primary);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 800; letter-spacing: -.025em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); font-weight: 700; letter-spacing: -.015em; }
h3 { font-size: 1.18rem; font-weight: 600; }

p { margin: 0 0 1em; }

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-600); }

:focus-visible {
  outline: 3px solid var(--accent-500);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 18px;
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.topbar {
  background: var(--navy-900);
  color: var(--navy-300);
  font-size: .82rem;
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  min-height: 36px;
  flex-wrap: wrap;
}
.topbar a { color: var(--navy-200); display: inline-flex; align-items: center; gap: 6px; }
.topbar a:hover { color: #fff; }
.topbar svg { width: 14px; height: 14px; flex: none; }
.topbar-contact { display: flex; gap: 20px; flex-wrap: wrap; }

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--navy-900);
  letter-spacing: -.02em;
}
.brand:hover { color: var(--navy-900); }
.brand-mark {
  width: 38px;
  height: 38px;
  flex: none;
  display: grid;
  place-items: center;
  background: var(--navy-900);
  color: var(--accent-500);
  border-radius: 10px;
  font-size: 1.1rem;
}
.brand-mark svg { width: 20px; height: 20px; }
.brand span em { font-style: normal; color: var(--accent-700); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-menu a {
  display: block;
  padding: 10px 14px;
  font-size: .95rem;
  font-weight: 600;
  color: var(--navy-700);
  border-radius: 8px;
}
.nav-menu a:hover { color: var(--navy-900); background: var(--navy-100); }
.nav-menu a[aria-current="page"] {
  color: #713f12;
  background: var(--accent-100);
}
.nav-cta { margin-left: 8px; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 9px 11px;
  cursor: pointer;
  color: var(--navy-800);
}
.nav-toggle svg { width: 22px; height: 22px; display: block; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 10px;
  font-family: var(--font-heading);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  min-height: 46px;
}
.btn svg { width: 17px; height: 17px; flex: none; }

.btn-primary {
  background: linear-gradient(160deg, #f2c11f, var(--accent-500));
  color: var(--navy-950);
}
.btn-primary:hover {
  background: linear-gradient(160deg, #f7cf3d, #f2c11f);
  color: var(--navy-950);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(202, 138, 4, .38);
}

.btn-outline {
  background: transparent;
  color: var(--navy-800);
  border-color: var(--navy-300);
}
.btn-outline:hover { border-color: var(--navy-800); color: var(--navy-900); }

.btn-light {
  background: #fff;
  color: var(--navy-900);
}
.btn-light:hover { background: var(--navy-100); color: var(--navy-900); transform: translateY(-2px); }

.btn-ghost-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, .35);
}
.btn-ghost-light:hover { border-color: #fff; color: #fff; background: rgba(255,255,255,.08); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(234, 179, 8, .16), transparent 60%),
    radial-gradient(700px 420px at -10% 110%, rgba(161, 98, 7, .22), transparent 55%),
    linear-gradient(150deg, var(--navy-950) 0%, var(--navy-900) 55%, #2b2110 100%);
  color: #fff;
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 1;
  padding: 96px 0 64px;
  max-width: 780px;
}
.hero h1 { color: #fff; margin-bottom: 20px; letter-spacing: -.025em; }
.hero h1 em { font-style: normal; color: var(--accent-500); }
.hero p.lead {
  font-size: 1.13rem;
  color: var(--navy-300);
  max-width: 620px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Tek yazarlı giriş anı: hero içeriği kademeli yükselir */
html.js .hero-inner > * {
  opacity: 0;
  transform: translateY(18px);
  animation: hero-rise .7s cubic-bezier(.16, 1, .3, 1) forwards;
}
html.js .hero-inner > h1 { animation-delay: .05s; }
html.js .hero-inner > .lead { animation-delay: .16s; }
html.js .hero-inner > .hero-actions { animation-delay: .27s; }
html.js .hero-fact { opacity: 0; animation: hero-rise .7s cubic-bezier(.16, 1, .3, 1) .42s forwards; }
@keyframes hero-rise {
  to { opacity: 1; transform: none; }
}

.hero-fact {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 26px 0 34px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  max-width: 760px;
  font-size: 1.02rem;
  line-height: 1.7;
  color: var(--navy-400);
}
.hero-fact strong {
  color: var(--accent-500);
  font-family: var(--font-heading);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* Page hero (inner pages) */
.page-hero {
  background:
    radial-gradient(800px 400px at 90% -20%, rgba(234, 179, 8, .14), transparent 60%),
    linear-gradient(150deg, var(--navy-950), var(--navy-900));
  color: #fff;
  padding: 64px 0 56px;
}
.page-hero h1 { color: #fff; font-size: clamp(1.8rem, 3.6vw, 2.7rem); margin-bottom: 10px; }
.page-hero p { color: var(--navy-300); max-width: 640px; margin: 0; font-size: 1.05rem; }
.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  font-size: .85rem;
  color: var(--navy-400);
}
.breadcrumb a { color: var(--navy-300); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb li + li::before { content: "/"; margin-right: 8px; color: var(--navy-600); }

/* ---------- Sections ---------- */

.section { padding: 80px 0; }
.section-alt { background: var(--color-surface); }

.section-head {
  max-width: 640px;
  margin-bottom: 46px;
}
.section-head.center { margin-inline: auto; text-align: center; }
.section-head p { color: var(--color-text-muted); margin: 0; }
.section-head h2 { text-wrap: balance; }

/* ---------- Cards ---------- */

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--navy-300);
}
.card .icon {
  width: 52px;
  height: 52px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: var(--accent-100);
  color: var(--accent-700);
  margin-bottom: 18px;
}
.card .icon svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--color-text-muted); font-size: .95rem; margin: 0; }
.card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-weight: 600;
  font-size: .9rem;
  color: var(--accent-700);
}
.card .card-link svg { width: 15px; height: 15px; transition: transform var(--transition); }
.card:hover .card-link svg { transform: translateX(4px); }

a.card { display: block; color: inherit; }

/* Öne çıkan hizmet: koyu zemin, tam satır, yatay düzen */
.card-featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
  background:
    radial-gradient(500px 260px at 95% -20%, rgba(234, 179, 8, .16), transparent 60%),
    linear-gradient(145deg, var(--navy-950), var(--navy-900));
  border-color: var(--navy-800);
  padding: 34px 32px;
}
.card-featured .icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  margin-bottom: 0;
  background: rgba(234, 179, 8, .14);
  color: var(--accent-500);
}
.card-featured h3 { color: #fff; font-size: 1.35rem; }
.card-featured p { color: var(--navy-300); max-width: 70ch; }
.card-featured .card-link { color: var(--accent-500); }
.card-featured:hover { border-color: var(--accent-600); }

@media (max-width: 560px) {
  .card-featured { grid-template-columns: 1fr; }
}

/* Feature list (about page) */
.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}
.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--navy-700);
}
.check-list svg {
  width: 21px;
  height: 21px;
  flex: none;
  color: var(--accent-700);
  margin-top: 2px;
}
.check-list-dark li { color: var(--navy-300); }
.check-list-dark svg { color: var(--accent-500); }

/* Kategori listesi: kart yerine ikonlu iki kolon liste */
.category-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px 48px;
  max-width: 980px;
  margin-inline: auto;
}
.category-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.category-list .cat-icon {
  width: 42px;
  height: 42px;
  flex: none;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--accent-100);
  color: var(--accent-700);
}
.category-list .cat-icon svg { width: 21px; height: 21px; }
.category-list strong {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: 2px;
}
.category-list .desc {
  color: var(--color-text-muted);
  font-size: .95rem;
}

/* İlkeler: kart yerine tipografik iki kolon */
.principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 64px;
  max-width: 900px;
  margin-inline: auto;
}
.principles h3::before {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background: var(--accent-500);
  margin-bottom: 12px;
}
.principles h3 { margin-bottom: 6px; }
.principles p { color: var(--color-text-muted); margin: 0; }

/* ---------- Split layout ---------- */

.split {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items: center;
}
.split-media {
  background: linear-gradient(150deg, var(--navy-900), #2b2110);
  border-radius: var(--radius-lg);
  padding: 40px;
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.split-media h3 { color: #fff; }
.split-media p { color: var(--navy-300); }

/* ---------- Brands ---------- */

.brand-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.brand-chip {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: .92rem;
  color: var(--navy-600);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 10px 20px;
  border-radius: 999px;
  transition: all var(--transition);
}
.brand-chip:hover {
  color: var(--accent-700);
  border-color: var(--accent-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ---------- References ---------- */

.ref-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.ref-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 18px 16px;
  font-size: .92rem;
  font-weight: 600;
  color: var(--navy-700);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all var(--transition);
}
.ref-item:hover { border-color: var(--accent-700); color: var(--navy-900); box-shadow: var(--shadow-sm); }
.ref-item svg { width: 17px; height: 17px; flex: none; color: var(--accent-700); }

.ref-cat {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy-900);
  margin: 38px 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.ref-cat:first-of-type { margin-top: 0; }
.ref-cat svg { width: 20px; height: 20px; color: var(--accent-700); }

/* ---------- Fact band (editorial stats) ---------- */

.fact-band {
  background:
    radial-gradient(600px 300px at 90% -20%, rgba(234, 179, 8, .14), transparent 60%),
    linear-gradient(140deg, var(--navy-950), var(--navy-900));
  border-radius: var(--radius-lg);
  padding: 46px 52px;
  color: var(--navy-300);
  box-shadow: var(--shadow-lg);
  max-width: 900px;
  margin-inline: auto;
}
.fact-band p {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.85;
}
.fact-band strong {
  color: var(--accent-500);
  font-family: var(--font-heading);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* ---------- CTA band ---------- */

.cta-band {
  background:
    radial-gradient(700px 350px at 15% -30%, rgba(234, 179, 8, .2), transparent 60%),
    linear-gradient(140deg, var(--navy-950), var(--navy-900));
  border-radius: var(--radius-lg);
  padding: 60px 48px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-lg);
}
.cta-band h2 { color: #fff; margin-bottom: 8px; }
.cta-band p { color: var(--navy-300); margin: 0; max-width: 520px; }
.cta-band .actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Service detail blocks ---------- */

.service-block {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 34px 30px;
  box-shadow: var(--shadow-sm);
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 22px;
  align-items: start;
  scroll-margin-top: 130px;
}
.service-block .icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--accent-100);
  color: var(--accent-700);
}
.service-block .icon svg { width: 30px; height: 30px; }
.service-block h2 { font-size: 1.35rem; margin-bottom: 8px; }
.service-block p { color: var(--color-text-muted); margin-bottom: 0; }
.service-block ul {
  margin: 14px 0 0;
  padding: 0 0 0 2px;
  list-style: none;
  display: grid;
  gap: 8px;
  color: var(--navy-700);
  font-size: .95rem;
}
.service-block ul li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.service-block ul svg { width: 17px; height: 17px; flex: none; color: var(--accent-700); margin-top: 3px; }

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
}
.contact-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--navy-100);
}
.contact-item:last-child { border-bottom: 0; }
.contact-item .icon {
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--accent-100);
  color: var(--accent-700);
}
.contact-item .icon svg { width: 21px; height: 21px; }
.contact-item strong { display: block; font-family: var(--font-heading); font-size: .95rem; }
.contact-item span, .contact-item a.value { color: var(--color-text-muted); font-size: .95rem; }

.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 34px 30px;
  box-shadow: var(--shadow-sm);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 7px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label {
  font-family: var(--font-heading);
  font-size: .88rem;
  font-weight: 600;
  color: var(--navy-800);
}
.form-field label .req { color: #dc2626; }
.form-field input,
.form-field textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 13px 15px;
  border: 1.5px solid var(--color-border);
  border-radius: 10px;
  background: var(--navy-50);
  color: var(--color-text);
  transition: border-color var(--transition), background var(--transition);
  width: 100%;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent-600);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(202, 138, 4, .18);
}
.form-field textarea { resize: vertical; min-height: 140px; }
.form-note { font-size: .85rem; color: var(--navy-500); margin-top: 14px; }
.form-status {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 10px;
  font-size: .95rem;
}
.form-status.ok { display: flex; gap: 10px; align-items: center; background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.form-status.err { display: flex; gap: 10px; align-items: center; background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.form-status svg { width: 19px; height: 19px; flex: none; }

.map-frame {
  border: 0;
  width: 100%;
  height: 380px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: block;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--navy-950);
  color: var(--navy-400);
  padding: 64px 0 0;
  font-size: .93rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.site-footer .footer-title {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
}
.site-footer .brand { color: #fff; margin-bottom: 14px; }
.site-footer p { color: var(--navy-400); }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer-links a { color: var(--navy-400); }
.footer-links a:hover { color: #fff; }
.footer-contact { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.footer-contact li { display: flex; gap: 11px; align-items: flex-start; }
.footer-contact svg { width: 17px; height: 17px; flex: none; color: var(--accent-500); margin-top: 3px; }
.footer-contact a { color: var(--navy-400); }
.footer-contact a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid var(--navy-800);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: .85rem;
}
.footer-bottom a { color: var(--navy-400); }
.footer-bottom a:hover { color: #fff; }

/* ---------- Browser surfaces ---------- */

::selection { background: var(--accent-500); color: var(--navy-950); }

html {
  scrollbar-color: var(--navy-500) var(--navy-100);
}

input, textarea { caret-color: var(--accent-600); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html.js .hero-inner > *, html.js .hero-fact { opacity: 1; transform: none; }
}

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .ref-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 14px 20px 20px;
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 13px 14px; }
  .nav-cta { margin: 8px 0 0; }
  .topbar-inner { justify-content: center; }
  .topbar .topbar-note { display: none; }
  .hero-inner { padding: 64px 0 52px; }
  .contact-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .cta-band { padding: 44px 28px; }
}

@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .category-list, .principles { grid-template-columns: 1fr; }
  .ref-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-grid { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .service-block { grid-template-columns: 1fr; }
  .service-block .icon { width: 56px; height: 56px; }
}