/* =========================================================================
   Layout — konteyner, grid, bölüm ritmi, header, footer
   ========================================================================= */

.wrap {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--flush { padding-inline: 0; max-width: none; }

/* 12 kolon mimari grid */
.grid12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: clamp(16px, 2vw, 32px);
}

.section { padding-block: var(--space-2xl); position: relative; }
.section--sm { padding-block: var(--space-xl); }
.section--flush-top { padding-top: 0; }
.section--alt { background: var(--color-bg-alt); }
.section--dark { background: var(--color-bg-dark); color: var(--color-text-invert); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--color-text-invert); }
.section--charcoal { background: var(--color-bg-charcoal); color: var(--color-text-invert); }

.rule { height: 1px; background: var(--color-line); }
.section--dark .rule { background: var(--color-line-dark); }

/* ---------------------------------------------------------------- Header */
/* Üst bant: her sayfada dolu marka rengi, akışta sticky durur. */
/* Sade, açık üst bant — referans sitelerdeki gibi hafif ve kurumsal */
.site-header {
  position: sticky; top: 0; z-index: var(--z-header);
  height: var(--header-h);
  display: flex; align-items: center;
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--color-line);
  transition: height var(--duration-fast) var(--ease),
              box-shadow var(--duration-fast) var(--ease),
              border-color var(--duration-fast) var(--ease);
}
.site-header.is-stuck {
  height: var(--header-h-stuck);
  border-bottom-color: transparent;
  box-shadow: var(--shadow);
}

.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-md); width: 100%;
}

/* Logo */
.brand {
  display: block; flex: none;
  height: 54px; width: auto;
  transition: height var(--duration-fast) var(--ease);
}
.brand img { height: 100%; width: auto; display: block; }
.is-stuck .brand { height: 40px; }

.main-nav { display: flex; align-items: center; gap: clamp(18px, 2.4vw, 40px); }
.main-nav a {
  position: relative; padding-block: 6px;
  font-size: var(--fs-sm); font-weight: 450; letter-spacing: .01em;
  /* Bant sağa doğru maviye döndüğü için menü rengi bir tık koyu:
     en açık noktada 8.7, en mavi noktada 4.9 kontrast verir. */
  color: #354C66;
  transition: color var(--duration-fast) var(--ease);
}
.main-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--color-accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--duration) var(--ease);
}
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--color-text); }
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { transform: scaleX(1); }


.header-actions { display: flex; align-items: center; gap: var(--space-sm); flex: none; }

/* Menü butonu */
.menu-toggle {
  display: none; width: 44px; height: 44px;
  align-items: center; justify-content: center; flex: none;
}
.menu-toggle__bars { display: block; width: 22px; height: 9px; position: relative; }
.menu-toggle__bars::before, .menu-toggle__bars::after {
  content: ""; position: absolute; left: 0; width: 22px; height: 1.5px;
  background: var(--color-text);
  transition: transform var(--duration-fast) var(--ease), top var(--duration-fast) var(--ease), background var(--duration-fast);
}
.menu-toggle__bars::before { top: 0; }
.menu-toggle__bars::after { top: 8px; }

.menu-toggle[aria-expanded="true"] .menu-toggle__bars::before { top: 4px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__bars::after { top: 4px; transform: rotate(-45deg); }

/* Fullscreen mobil menü */
.drawer {
  position: fixed; inset: 0; z-index: var(--z-drawer);
  background: var(--color-bg); color: var(--color-text);
  padding: calc(var(--header-h) + var(--space-md)) var(--gutter) var(--space-lg);
  display: flex; flex-direction: column;
  opacity: 0; visibility: hidden;
  transition: opacity var(--duration-fast) var(--ease), visibility var(--duration-fast);
  overflow-y: auto;
}
.drawer.is-open { opacity: 1; visibility: visible; }
.drawer__nav { display: flex; flex-direction: column; }
.drawer__link {
  display: flex; align-items: baseline; gap: 16px;
  padding-block: clamp(14px, 2.4vh, 22px);
  border-bottom: 1px solid var(--color-line);
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.9rem, 8vw, 2.9rem); letter-spacing: var(--ls-tight);
  opacity: 0; transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease), color var(--duration-fast);
}
.drawer.is-open .drawer__link { opacity: 1; transform: none; }
.drawer.is-open .drawer__link:nth-child(1) { transition-delay: .06s; }
.drawer.is-open .drawer__link:nth-child(2) { transition-delay: .12s; }
.drawer.is-open .drawer__link:nth-child(3) { transition-delay: .18s; }
.drawer.is-open .drawer__link:nth-child(4) { transition-delay: .24s; }
.drawer.is-open .drawer__link:nth-child(5) { transition-delay: .30s; }
.drawer__link em {
  font-style: normal; font-size: var(--fs-xs); letter-spacing: .2em;
  color: var(--color-accent-ink); font-family: var(--font-body);
}
.drawer__link[aria-current="page"] { color: var(--color-accent-ink); }
.drawer__foot {
  margin-top: auto; padding-top: var(--space-lg);
  display: grid; gap: var(--space-xs);
  color: var(--color-muted-dark); font-size: var(--fs-sm);
}
.drawer__foot a { color: var(--color-text); }
.drawer__foot .btn { color: var(--color-bg); }
body.is-locked { overflow: hidden; }

/* Menü açıkken header şeffaf kalsın; kapatma butonu çekmecenin üstünde görünür */
body.is-locked .site-header { box-shadow: none; }

/* ---------------------------------------------------------------- Footer */
.site-footer {
  background: var(--color-bg-dark); color: var(--color-text-invert);
  padding-top: var(--space-xl);
}
.footer-logo { padding-bottom: var(--space-lg); }
.footer-logo img {
  width: clamp(260px, 38vw, 520px); height: auto;
}

.footer-cols {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  padding-block: var(--space-lg);
  border-top: 1px solid var(--color-line-dark);
}
.footer-cols h4 {
  font-family: var(--font-body); font-size: var(--fs-eyebrow);
  letter-spacing: var(--ls-wide); text-transform: uppercase;
  color: #A8BDD0; font-weight: 500; margin-bottom: var(--space-sm);
}
.footer-cols ul { display: grid; gap: 12px; }
.footer-cols a, .footer-cols p {
  color: var(--color-stone); font-size: var(--fs-sm);
  transition: color var(--duration-fast) var(--ease);
}
.footer-cols a:hover { color: var(--color-text-invert); }
.footer-cols p { margin: 0; }

/* Tasarım kredisi */
.site-credit {
  border-top: 1px solid var(--color-line-dark);
  padding-block: var(--space-sm);
  display: flex; flex-wrap: wrap; align-items: center; gap: 14px;
  justify-content: center;
  font-size: var(--fs-xs); color: #A8BDD0;
}
.site-credit img { height: 26px; width: auto; opacity: .85; transition: opacity var(--duration-fast); }
.site-credit a { display: inline-flex; align-items: center; gap: 12px; color: var(--color-stone); }
.site-credit a:hover { color: var(--color-text-invert); }
.site-credit a:hover img { opacity: 1; }

.footer-bottom {
  display: flex; flex-wrap: wrap; gap: 12px var(--space-md);
  justify-content: space-between; align-items: center;
  padding-block: var(--space-sm);
  border-top: 1px solid var(--color-line-dark);
  font-size: var(--fs-xs); color: #A8BDD0;
}
.footer-bottom p { margin: 0; color: #A8BDD0; }
.footer-bottom nav { display: flex; gap: var(--space-sm); }
.footer-bottom a:hover { color: var(--color-stone); }

/* Sabit yardımcı butonlar */
.float-actions {
  position: fixed;
  right: max(20px, env(safe-area-inset-right));
  bottom: max(20px, env(safe-area-inset-bottom));
  z-index: var(--z-float); display: grid; gap: 10px;
}
.float-btn {
  width: 52px; height: 52px; display: grid; place-items: center;
  border-radius: 50%; overflow: hidden;
  background: var(--color-bg-dark); color: var(--color-text-invert);
  border: 2px solid rgba(255,255,255,.92);
  transition: background var(--duration-fast) var(--ease), transform var(--duration-fast) var(--ease), opacity .3s, visibility .3s;
}
.float-btn { box-shadow: 0 8px 24px rgba(10, 35, 55, .24); }
.float-btn:hover { background: var(--color-accent); transform: translateY(-2px); }
.float-btn svg { width: 20px; height: 20px; }
.float-btn--wa { background: #20a85a; }
.float-btn--wa svg { width: 25px; height: 25px; }
.float-btn--top { opacity: 0; visibility: hidden; }
.float-btn--top.is-visible { opacity: 1; visibility: visible; }