/* ═══════════════════════════════════════════════════════════════
   ERDİL PROMO — erdilpromo.com
   Koyu, premium tek sayfa site. Bağımsız — harici framework yok.
   ═══════════════════════════════════════════════════════════════ */

/* Varsayılan tema: KOYU. html[data-theme="light"] açık temaya geçirir. */
:root {
  color-scheme: dark;
  --bg:            #0d0f14;
  --bg-alt:        #12151d;
  --surface:       #171b25;
  --surface-hover: #1a1f2b;
  --line:          rgba(255, 255, 255, .08);
  --text:          #f2f0ea;
  --muted:         #a8adb8;
  --faint:         rgba(242, 240, 234, .55);
  --faint-2:       rgba(242, 240, 234, .35);
  --glass:         rgba(13, 15, 20, .82);
  --overlay:       rgba(11, 13, 18, .97);
  --hover-soft:    rgba(255, 255, 255, .05);
  --ghost-line:    rgba(255, 255, 255, .22);
  --input-bg:      #0f121a;
  --shadow-c:      rgba(0, 0, 0, .5);
  --glow-a:        rgba(255, 138, 92, .17);
  --glow-b:        rgba(142, 166, 200, .10);
  --accent-text:   var(--accent-1);
  --accent-1:  #ffc46b;   /* amber  */
  --accent-2:  #ff8a5c;   /* mercan */
  --accent-3:  #ff6b8b;   /* gül    */
  --wa:        #25d366;
  --radius:    18px;
  --wrap:      1180px;
  --font-d:    'Sora', system-ui, sans-serif;
  --font-b:    'Manrope', system-ui, sans-serif;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg:            #faf8f4;
  --bg-alt:        #f2eee7;
  --surface:       #ffffff;
  --surface-hover: #fff7ec;
  --line:          rgba(28, 24, 40, .11);
  --text:          #221f2b;
  --muted:         #5d6069;
  --faint:         rgba(34, 31, 43, .5);
  --faint-2:       rgba(34, 31, 43, .35);
  --glass:         rgba(250, 248, 244, .85);
  --overlay:       rgba(250, 248, 244, .97);
  --hover-soft:    rgba(28, 24, 40, .06);
  --ghost-line:    rgba(28, 24, 40, .28);
  --input-bg:      #f5f1e9;
  --shadow-c:      rgba(35, 28, 55, .16);
  --glow-a:        rgba(255, 138, 92, .16);
  --glow-b:        rgba(120, 150, 195, .12);
  --accent-text:   #b4600f;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-b);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--font-d); line-height: 1.15; font-weight: 700; }

.grad {
  background: linear-gradient(100deg, var(--accent-1), var(--accent-2) 55%, var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: 16px;
}

/* ─────────────── Butonlar ─────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 50px;
  font-family: var(--font-d);
  font-size: 15px;
  font-weight: 600;
  transition: box-shadow .3s ease, background .3s ease, border-color .3s ease, color .3s ease;
  cursor: pointer;
  border: 0;
}

.btn-primary {
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  color: #211408;
  box-shadow: 0 6px 24px rgba(255, 158, 94, .28);
}
.btn-primary:hover { box-shadow: 0 10px 34px rgba(255, 158, 94, .45); }

.btn-ghost {
  border: 1px solid var(--ghost-line);
  color: var(--text);
  background: var(--hover-soft);
}
.btn-ghost:hover { border-color: var(--accent-1); color: var(--accent-text); }

.btn-lg { padding: 17px 34px; font-size: 16px; }
.mt { margin-top: 28px; }

/* ─────────────── Üst Menü ─────────────── */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: padding .35s ease, box-shadow .35s ease;
}

/* Cam arka plan pseudo-elemanda: backdrop-filter doğrudan header'a
   verilseydi, içindeki position:fixed mobil menünün referans kutusu
   header olurdu ve tam ekran menü header yüksekliğine sıkışırdı. */
.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transition: opacity .35s ease;
}

.site-header.scrolled {
  padding: 10px 0;
  box-shadow: 0 8px 30px var(--shadow-c);
}

.site-header.scrolled::before { opacity: 1; }

.header-inner { display: flex; align-items: center; gap: 32px; }

.brand { display: inline-flex; align-items: center; gap: 10px; }

/* ERDP logosu 768x768 tuvalde geniş şeffaf paylı; object-fit: cover
   yazı markasını ortadan kırparak gösterir (oran 150:44 korunmalı). */
.brand-logo {
  width: 150px;
  height: 44px;
  object-fit: cover;
  display: block;
  transition: filter .3s ease;
}
.brand.small .brand-logo { width: 110px; height: 32px; }

/* Logo koyu mürekkep renginde; koyu temada beyaza çevrilir */
html:not([data-theme="light"]) .brand-logo { filter: invert(1); }

.main-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav > a {
  padding: 9px 15px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--muted);
  transition: color .25s ease, background .25s ease;
}
.main-nav > a:hover { color: var(--text); background: var(--hover-soft); }

.main-nav .nav-cta {
  margin-left: 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 50px;
  background: linear-gradient(120deg, var(--wa), #128c7e);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37, 211, 102, .25);
  transition: box-shadow .3s ease;
}
.main-nav .nav-cta:hover { color: #fff; background: linear-gradient(120deg, var(--wa), #128c7e); box-shadow: 0 8px 26px rgba(37, 211, 102, .45); }

/* Tema düğmesi */
.theme-toggle {
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--hover-soft);
  color: var(--text);
  cursor: pointer;
  transition: border-color .25s ease, color .25s ease;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--accent-1); color: var(--accent-1); }
.theme-toggle svg { width: 20px; height: 20px; }
.theme-toggle .ic-moon { display: none; }
html[data-theme="light"] .theme-toggle .ic-sun { display: none; }
html[data-theme="light"] .theme-toggle .ic-moon { display: block; }

.nav-toggle {
  display: none;
  width: 46px; height: 46px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--hover-soft);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  width: 20px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─────────────── Hero ─────────────── */

.hero {
  position: relative;
  padding: 170px 0 90px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -220px; right: -180px;
  width: 640px; height: 640px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow-a), transparent 65%);
  pointer-events: none;
}
.hero-glow::after {
  content: '';
  position: absolute;
  top: 480px; right: 520px;
  width: 420px; height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow-b), transparent 65%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(42px, 6vw, 74px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 36px;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 36px; }

.hero-ticks { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.hero-ticks li {
  position: relative;
  padding-left: 26px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
}
.hero-ticks li::before {
  content: '';
  position: absolute;
  left: 0; top: 3px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--accent-1), var(--accent-2));
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / contain no-repeat;
}

/* Hero görsel kolajı */
.hero-visual {
  position: relative;
  height: 520px;
}
.hv-card {
  position: absolute;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 60px var(--shadow-c);
  border: 1px solid var(--line);
}
.hv-card img { width: 100%; height: 100%; object-fit: cover; }
.hv-a { width: 58%; height: 74%; right: 6%; top: 0; z-index: 2; }
.hv-b { width: 44%; height: 56%; left: 0; bottom: 4%; z-index: 3; }
.hv-c { width: 36%; height: 44%; right: 0; bottom: 0; z-index: 1; opacity: .9; }

@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
.hv-a { animation: floaty 7s ease-in-out infinite; }
.hv-b { animation: floaty 8.5s ease-in-out 1s infinite; }
.hv-c { animation: floaty 9.5s ease-in-out .5s infinite; }

/* ─────────────── Kayan Şerit ─────────────── */

.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-alt);
  padding: 18px 0;
}
.marquee-track {
  display: flex;
  align-items: center;
  gap: 34px;
  width: max-content;
  animation: marquee 36s linear infinite;
}
.marquee-track span {
  font-family: var(--font-d);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--faint);
  white-space: nowrap;
}
.marquee-track i { color: var(--accent-2); font-style: normal; font-size: 12px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ─────────────── Bölüm iskeleti ─────────────── */

.section { padding: 110px 0; }
.section-alt { background: var(--bg-alt); }

.sec-head { max-width: 640px; margin-bottom: 60px; }
.sec-head h2 { font-size: clamp(30px, 4vw, 44px); letter-spacing: -.5px; margin-bottom: 18px; }
.sec-sub { color: var(--muted); font-size: 17px; }

/* ─────────────── Kategori Kartları ─────────────── */

.cat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.cat-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: border-color .35s ease, background .35s ease, box-shadow .35s ease;
}
.cat-card:hover {
  border-color: rgba(255, 196, 107, .45);
  background: var(--surface-hover);
  box-shadow: 0 18px 44px var(--shadow-c);
}

.cat-icon {
  width: 52px; height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(255, 196, 107, .16), rgba(255, 138, 92, .1));
  border: 1px solid rgba(255, 196, 107, .25);
  color: var(--accent-1);
}
.cat-icon svg { width: 26px; height: 26px; }

.cat-card h3 { font-size: 17px; margin-bottom: 10px; }
.cat-card p { font-size: 14px; color: var(--muted); }

.cat-note { margin-top: 40px; text-align: center; color: var(--muted); font-size: 15px; }
.cat-note a { color: var(--accent-text); font-weight: 700; border-bottom: 1px solid rgba(255, 196, 107, .55); }
.cat-note a:hover { border-bottom-color: var(--accent-1); }

/* ─────────────── Galeri ─────────────── */

.gallery {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  padding: 6px 24px 26px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--faint-2) transparent;
}
.gallery figure {
  flex: 0 0 auto;
  width: 280px;
  aspect-ratio: 3 / 3.9;
  border-radius: var(--radius);
  overflow: hidden;
  scroll-snap-align: center;
  border: 1px solid var(--line);
  cursor: zoom-in;
  position: relative;
}
.gallery img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s cubic-bezier(.22, 1, .36, 1);
}
.gallery figure:hover img { transform: scale(1.06); }

.gallery-hint {
  text-align: center;
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--faint-2);
}

/* Lightbox */
.lightbox[hidden] { display: none; }
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(8, 9, 12, .92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.lightbox img {
  max-width: min(92vw, 720px);
  max-height: 86vh;
  border-radius: 14px;
  box-shadow: 0 40px 90px rgba(0, 0, 0, .6);
}
.lb-close {
  position: absolute;
  top: 22px; right: 28px;
  width: 48px; height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .25);
  background: rgba(255, 255, 255, .06);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  transition: background .25s ease;
}
.lb-close:hover { background: rgba(255, 255, 255, .15); }

/* ─────────────── Neden Biz ─────────────── */

.split {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 64px;
  align-items: center;
}
.split-copy h2 { font-size: clamp(28px, 3.6vw, 40px); margin-bottom: 18px; }

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.feature {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color .35s ease, box-shadow .35s ease;
}
.feature:hover { border-color: rgba(255, 196, 107, .4); box-shadow: 0 16px 40px var(--shadow-c); }

.f-icon {
  width: 46px; height: 46px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(255, 196, 107, .16), rgba(255, 107, 139, .1));
  border: 1px solid rgba(255, 196, 107, .25);
  color: var(--accent-1);
}
.f-icon svg { width: 22px; height: 22px; }

.feature h3 { font-size: 16.5px; margin-bottom: 8px; }
.feature p { font-size: 14px; color: var(--muted); }

/* ─────────────── Süreç ─────────────── */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  counter-reset: step;
}
.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 26px 28px;
  overflow: hidden;
}
.step::after {
  content: '';
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2), transparent);
  opacity: 0;
  transition: opacity .35s ease;
}
.step:hover::after { opacity: 1; }

.step-no {
  display: block;
  font-family: var(--font-d);
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 18px;
  background: linear-gradient(120deg, rgba(255, 196, 107, .9), rgba(255, 138, 92, .5));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.step h3 { font-size: 17px; margin-bottom: 10px; }
.step p { font-size: 14px; color: var(--muted); }

/* ─────────────── Katalog Bandı ─────────────── */

.catalog-band {
  position: relative;
  padding: 90px 0;
  background:
    radial-gradient(700px 300px at 15% 50%, rgba(255, 138, 92, .13), transparent 70%),
    radial-gradient(600px 300px at 85% 50%, rgba(255, 196, 107, .1), transparent 70%),
    var(--bg-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.catalog-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.catalog-inner h2 { font-size: clamp(28px, 4vw, 42px); margin-bottom: 12px; }
.catalog-inner p { color: var(--muted); font-size: 17px; }
.catalog-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

/* ─────────────── İletişim ─────────────── */

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 40px;
  align-items: start;
}

.quote-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 32px;
}
.qf-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 18px;
}
.quote-form label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .3px;
  color: var(--muted);
}
.quote-form input,
.quote-form select {
  display: block;
  width: 100%;
  margin-top: 8px;
  padding: 13px 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--input-bg);
  color: var(--text);
  font-family: var(--font-b);
  font-size: 15px;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.quote-form input:focus,
.quote-form select:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px rgba(255, 196, 107, .15);
}
.quote-form input::placeholder { color: var(--faint-2); }
.quote-form select option { background: var(--surface); color: var(--text); }

.qf-submit { width: 100%; justify-content: center; margin-top: 8px; }
.qf-hint { margin-top: 14px; font-size: 12.5px; color: var(--faint); text-align: center; }

.contact-cards { display: grid; gap: 16px; }
.c-card {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: border-color .3s ease, background .3s ease;
}
.c-card:hover { border-color: rgba(255, 196, 107, .45); background: var(--surface-hover); }

.c-icon {
  flex-shrink: 0;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255, 196, 107, .16), rgba(255, 138, 92, .1));
  border: 1px solid rgba(255, 196, 107, .25);
  color: var(--accent-1);
}
.c-icon svg { width: 21px; height: 21px; }

.c-card h3 { font-size: 13px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
.c-card p { font-size: 15.5px; font-weight: 600; }

/* ─────────────── Footer ─────────────── */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 34px 0;
  background: var(--bg-alt);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-inner p { font-size: 13.5px; color: var(--muted); }
.footer-inner p a { color: var(--accent-text); }

/* ─────────────── WhatsApp Sabit Buton ─────────────── */

.wa-fab {
  position: fixed;
  right: 24px; bottom: 24px;
  z-index: 900;
  width: 58px; height: 58px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--wa), #128c7e);
  box-shadow: 0 10px 30px rgba(37, 211, 102, .35);
  transition: box-shadow .3s ease;
}
.wa-fab::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--wa);
  animation: pulse 2.4s ease-out infinite;
  z-index: -1;
}
.wa-fab:hover { box-shadow: 0 16px 40px rgba(37, 211, 102, .55); }
@keyframes pulse {
  0%   { transform: scale(1);    opacity: .45; }
  70%  { transform: scale(1.65); opacity: 0; }
  100% { transform: scale(1.65); opacity: 0; }
}

/* ─────────────── Reveal animasyonları ─────────────── */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.22, 1, .36, 1);
}
.reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: .1s; }
.d2 { transition-delay: .2s; }
.d3 { transition-delay: .3s; }
.d4 { transition-delay: .4s; }

/* ─────────────── Mobil ─────────────── */

@media (max-width: 1024px) {
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 44px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { height: 420px; max-width: 560px; }
}

@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }

  /* Mobil menü: tam ekran panel (transform yok — konum/opacity ile,
     absolute torunları zıplatma riski olmasın) */
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    inset: 0;
    z-index: 990;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    background: var(--overlay);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .35s ease, visibility .35s ease;
  }
  .main-nav.open { opacity: 1; visibility: visible; }
  .main-nav > a { font-size: 22px; padding: 14px 26px; }
  .main-nav .nav-cta { margin: 18px 0 0; font-size: 17px; padding: 14px 30px; }
  body.nav-locked { overflow: hidden; }
  .theme-toggle { margin-left: auto; }
  .site-header .brand,
  .site-header .theme-toggle,
  .site-header .nav-toggle { position: relative; z-index: 995; }
}

@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .hero { padding: 130px 0 60px; }
  .hero h1 { font-size: clamp(36px, 10vw, 48px); }
  .lead { font-size: 16px; }
  .cat-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .qf-row { grid-template-columns: 1fr; }
  .hero-visual { height: 340px; }
  .gallery figure { width: 220px; }
  .catalog-inner { justify-content: center; text-align: center; }
  .footer-inner { justify-content: center; text-align: center; }
  .wa-fab { right: 16px; bottom: 16px; width: 54px; height: 54px; }
}

/* ─────────────── Erişilebilirlik ─────────────── */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}