/* Ortak temel: sıfırlama, tipografi, butonlar, header, footer (index + menu) */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--hdr) + 12px); }
body {
  margin: 0;
  background: var(--milk-100);
  color: var(--g-700);
  font: 400 1rem/1.6 var(--f-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, video, canvas, picture { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
input { font: inherit; }
[hidden] { display: none !important; }
h1, h2, h3, h4 { margin: 0; color: var(--g-900); font-family: var(--f-display); font-weight: 500; line-height: 1.05;
  font-variation-settings: "opsz" 144; letter-spacing: -.01em; }
p { margin: 0; }
::selection { background: var(--milk-400); color: var(--ink); }
:focus-visible { outline: 2px solid var(--milk-700); outline-offset: 3px; border-radius: 6px; }

.wrap { width: min(100% - 2 * var(--gut), var(--maxw)); margin-inline: auto; }
.sr { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.eyebrow {
  display: inline-flex; align-items: center; gap: .6em;
  font: 600 .74rem/1 var(--f-body); letter-spacing: .22em; text-transform: uppercase; color: var(--milk-700);
}
.eyebrow::before { content: ""; width: 26px; height: 1.5px; background: currentColor; }
.hand { font-family: var(--f-hand); font-weight: 600; color: var(--milk-700); }
.it { font-style: italic; color: var(--milk-700); font-weight: 400; }

/* ---------- butonlar ---------- */
.btn {
  --bg: var(--g-900); --fg: var(--white);
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: .6em;
  min-height: 50px; padding: 0 1.5em; border-radius: 999px;
  background: var(--bg); color: var(--fg);
  font: 600 .95rem/1 var(--f-body); letter-spacing: .01em;
  overflow: hidden; isolation: isolate;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), background-color .3s;
}
.btn::after {      /* süt köpüğü dolgusu */
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  background: radial-gradient(circle at var(--mx, 50%) 120%, var(--milk-700) 0 0, transparent 0);
  transition: background .5s var(--ease-out);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -12px rgba(18, 20, 22, .55); }
.btn:hover::after { background: radial-gradient(circle at var(--mx, 50%) 120%, var(--milk-700) 0 160%, transparent 0); }
.btn svg { width: 18px; height: 18px; flex: none; transition: transform .35s var(--ease-out); }
.btn:hover svg { transform: translateX(3px); }
.btn--ghost { --bg: transparent; --fg: var(--g-900); box-shadow: inset 0 0 0 1.5px var(--g-900); }
.btn--ghost::after { background: radial-gradient(circle at var(--mx, 50%) 120%, var(--white) 0 0, transparent 0); }
.btn--ghost:hover::after { background: radial-gradient(circle at var(--mx, 50%) 120%, var(--white) 0 160%, transparent 0); }
.btn--light { --bg: var(--white); --fg: var(--g-900); }
.btn--light::after { background: radial-gradient(circle at var(--mx, 50%) 120%, var(--milk-200) 0 0, transparent 0); }
.btn--light:hover::after { background: radial-gradient(circle at var(--mx, 50%) 120%, var(--milk-200) 0 160%, transparent 0); }

/* ---------- header ---------- */
.hdr {
  position: fixed; inset: 0 0 auto; z-index: 50; height: var(--hdr);
  transition: transform .45s var(--ease-out), background-color .3s, box-shadow .3s;
}
.hdr.is-solid { background: rgba(243, 248, 251, .86); -webkit-backdrop-filter: blur(14px) saturate(1.3); backdrop-filter: blur(14px) saturate(1.3);
  box-shadow: 0 1px 0 rgba(75, 82, 88, .12); }
.hdr.is-hidden { transform: translateY(-100%); }
.hdr__in { height: 100%; display: flex; align-items: center; gap: 1.25rem; }
.brand { display: inline-flex; align-items: center; gap: .65rem; margin-right: auto; }
.brand img { width: 40px; height: 40px; border-radius: 50%; box-shadow: 0 2px 8px -2px rgba(18, 20, 22, .35); }
.brand b { font: 600 1.32rem/1 var(--f-display); letter-spacing: .14em; color: var(--g-900); font-variation-settings: "opsz" 144; }
.nav { display: flex; gap: .3rem; }
.nav a { position: relative; padding: .55rem .8rem; font-weight: 500; font-size: .95rem; color: var(--g-700); border-radius: 999px;
  transition: color .25s, background-color .25s; }
.nav a:hover { color: var(--g-900); background: rgba(255, 255, 255, .6); }
.hdr__cta { min-height: 42px; padding: 0 1.1rem; font-size: .9rem; }
.burger { display: none; width: 44px; height: 44px; border-radius: 50%; place-items: center; background: rgba(255, 255, 255, .7); }
.burger span { display: block; width: 18px; height: 1.5px; background: var(--g-900); position: relative; transition: transform .35s var(--ease-out), background-color .2s; }
.burger span::before, .burger span::after { content: ""; position: absolute; left: 0; width: 18px; height: 1.5px; background: var(--g-900); transition: transform .35s var(--ease-out); }
.burger span::before { transform: translateY(-6px); }
.burger span::after { transform: translateY(6px); }
.nav-open .burger span { background: transparent; }
.nav-open .burger span::before { transform: rotate(45deg); }
.nav-open .burger span::after { transform: rotate(-45deg); }

/* hero fotoğrafının üstündeyken açık renkli header */
.hdr.on-photo .brand b, .hdr.on-photo .nav a { color: var(--white); }
.hdr.on-photo .nav a:hover { background: rgba(255, 255, 255, .14); }
.hdr.on-photo .hdr__cta { --bg: var(--white); --fg: var(--g-900); }
.hdr.on-photo .burger { background: rgba(255, 255, 255, .22); }
.hdr.on-photo .burger span, .hdr.on-photo .burger span::before, .hdr.on-photo .burger span::after { background-color: var(--white); }
.nav-open .hdr.on-photo .burger span { background: transparent; }
.hdr.on-photo .rail__fill { opacity: 0; }

@media (max-width: 860px) {
  :root { --hdr: 62px; }
  .hdr.on-photo .nav a { color: var(--g-900); }
  .burger { display: grid; }
  .nav {
    position: fixed; inset: var(--hdr) 0 auto; flex-direction: column; gap: 0; padding: .5rem var(--gut) 1.25rem;
    background: rgba(243, 248, 251, .97); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
    box-shadow: 0 18px 30px -20px rgba(18, 20, 22, .4);
    transform: translateY(-8px); opacity: 0; visibility: hidden;
    transition: transform .35s var(--ease-out), opacity .3s, visibility .3s;
  }
  .nav a { padding: .95rem .25rem; font-size: 1.15rem; font-family: var(--f-display); color: var(--g-900); border-bottom: 1px solid var(--g-200); border-radius: 0; }
  .nav-open .nav { transform: none; opacity: 1; visibility: visible; }
  .brand b { font-size: 1.15rem; }
  .brand img { width: 36px; height: 36px; }
}

/* ---------- footer ---------- */
.ftr { position: relative; background: var(--g-850); color: var(--g-300); padding: 3.5rem 0 1.5rem; overflow: hidden; }
.ftr::before { content: ""; position: absolute; inset: 0; background: var(--lambiri-dark); opacity: .5; pointer-events: none; }
.ftr__in { position: relative; display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 2rem; }
.ftr .brand b { color: var(--white); }
.ftr h4 { color: var(--white); font: 600 .78rem/1 var(--f-body); letter-spacing: .2em; text-transform: uppercase; margin-bottom: 1rem; }
.ftr p, .ftr a { font-size: .95rem; line-height: 1.75; }
.ftr a:hover { color: var(--white); }
.ftr__note { margin-top: 1rem; max-width: 30ch; color: var(--g-300); }
.ftr__bottom { position: relative; margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid rgba(255, 255, 255, .12);
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .82rem; color: var(--g-500); }
@media (max-width: 760px) {
  .ftr__in { grid-template-columns: 1fr 1fr; }
  .ftr__in > :first-child { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}