/* ==========================================================================
   HEA Mimarlık · web sitesi taslağı
   Kurumsal kimlik: #333333 ana · #666666 alt yazı · #8E8E8E vurgu ·
   #CFCFCF çizgi · #F0F0F0 açık zemin · Montserrat
   İmza öğesi: yapı çizgileri (amblemin çizgilerinin sayfa boyunca uzatılması)
   ========================================================================== */

@font-face { font-family: "Montserrat"; font-weight: 200; font-style: normal; font-display: swap; src: url("../fonts/montserrat-200.woff2") format("woff2"); }
@font-face { font-family: "Montserrat"; font-weight: 300; font-style: normal; font-display: swap; src: url("../fonts/montserrat-300.woff2") format("woff2"); }
@font-face { font-family: "Montserrat"; font-weight: 400; font-style: normal; font-display: swap; src: url("../fonts/montserrat-400.woff2") format("woff2"); }
@font-face { font-family: "Montserrat"; font-weight: 500; font-style: normal; font-display: swap; src: url("../fonts/montserrat-500.woff2") format("woff2"); }
@font-face { font-family: "Montserrat"; font-weight: 600; font-style: normal; font-display: swap; src: url("../fonts/montserrat-600.woff2") format("woff2"); }

:root {
  --ink: #333333;
  --text: #666666;
  --accent: #8E8E8E;
  --rule: #CFCFCF;
  --mist: #F0F0F0;
  --paper: #FFFFFF;
  --hair: #E2E2DF;        /* yapı çizgisi, açık zemin */
  --hair-dark: #484848;   /* yapı çizgisi, koyu zemin */
  --on-dark: #F0F0F0;
  --on-dark-2: #C4C4C4;

  --gutter: clamp(22px, 4.2vw, 60px);
  --max: 1320px;
  --edge: max(var(--gutter), calc((100vw - var(--max)) / 2));
  --rail: 220px;          /* bölüm etiketi sütunu */
  --rail-gap: 44px;       /* dikme çizgisi ile içerik arası */
  --sec-pad: clamp(84px, 11vw, 168px);
  --ease: cubic-bezier(.2, .7, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: "Montserrat", Arial, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p, ul, ol, dl, dd, figure { margin: 0; padding: 0; }
ul, ol { list-style: none; }
strong, b { font-weight: 600; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
::selection { background: var(--ink); color: var(--on-dark); }

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--paper); color: var(--ink); padding: 10px 16px; font-size: 13px;
}
.skip:focus { top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- Ortak tipografi ---------- */
.label {
  font-size: 11px; font-weight: 500; letter-spacing: .3em; text-transform: uppercase;
  line-height: 1.5; color: var(--text);
}
.h2 {
  font-size: clamp(34px, 4.5vw, 62px); line-height: 1.12; font-weight: 300;
  letter-spacing: -.012em; color: var(--ink);
}
.h2 strong { display: block; font-weight: 600; }
.lead { font-size: clamp(17px, 1.45vw, 20px); line-height: 1.7; font-weight: 300; color: var(--text); max-width: 34em; }
.bar { display: block; width: 56px; height: 5px; background: var(--accent); margin: 30px 0 32px; }

.btn {
  display: inline-flex; align-items: center; gap: 16px;
  min-height: 52px; padding: 0 26px;
  font-size: 11px; font-weight: 500; letter-spacing: .26em; text-transform: uppercase;
  border: 1px solid currentColor; color: var(--ink);
  transition: background .35s var(--ease), color .35s var(--ease), border-color .35s var(--ease);
}
.btn .arr { width: 22px; height: 1px; background: currentColor; position: relative; transition: width .35s var(--ease); }
.btn .arr::after { content: ""; position: absolute; right: 0; top: -3px; width: 7px; height: 7px; border-top: 1px solid currentColor; border-right: 1px solid currentColor; transform: rotate(45deg); }
.btn:hover .arr { width: 34px; }
.btn:hover { background: var(--ink); color: var(--on-dark); border-color: var(--ink); }
.btn--solid { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }
.btn--solid:hover { background: transparent; color: var(--on-dark); border-color: var(--on-dark); }
.btn--ghost { color: var(--on-dark); border-color: #6b6b6b; }
.btn--ghost:hover { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }

.link {
  display: inline-flex; align-items: center; gap: 14px;
  font-size: 11px; font-weight: 500; letter-spacing: .26em; text-transform: uppercase; color: var(--ink);
  padding: 8px 0; position: relative;
}
.link::before { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--rule); }
.link::after { content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%; background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform .5s var(--ease); }
.link:hover::after { transform: scaleX(1); }

/* ---------- Üst bilgi ---------- */
.site-head {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  padding: 0 var(--edge);
  height: 88px; display: flex; align-items: center; justify-content: space-between;
  color: var(--on-dark);
  transition: height .4s var(--ease), background .4s var(--ease), box-shadow .4s var(--ease);
}
.site-head.is-stuck { height: 66px; background: rgba(51, 51, 51, .94); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 1px 0 var(--hair-dark); }
.brand { display: block; flex: none; }
.brand img { height: 34px; width: auto; transition: height .4s var(--ease); }
.is-stuck .brand img { height: 28px; }

.nav { display: flex; align-items: center; gap: clamp(20px, 2.6vw, 40px); }
.nav a { font-size: 11px; font-weight: 500; letter-spacing: .24em; text-transform: uppercase; color: var(--on-dark-2); padding: 10px 0; position: relative; transition: color .3s; }
.nav a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; bottom: 4px; width: 100%; height: 1px; background: var(--on-dark); transform: scaleX(0); transform-origin: left; transition: transform .45s var(--ease); }
.nav a:hover { color: var(--on-dark); }
.nav a:hover::after { transform: scaleX(1); }
.nav .nav-cta { border: 1px solid #6b6b6b; padding: 11px 20px; color: var(--on-dark); transition: background .3s, color .3s, border-color .3s; }
.nav .nav-cta:hover { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }

.menu-btn { display: none; width: 48px; height: 48px; margin-right: -12px; background: none; border: 0; color: inherit; cursor: pointer; position: relative; }
.menu-btn span { position: absolute; left: 12px; right: 12px; height: 1px; background: currentColor; transition: transform .4s var(--ease), top .4s var(--ease); }
.menu-btn span:nth-child(1) { top: 19px; }
.menu-btn span:nth-child(2) { top: 28px; right: 20px; }
.menu-open .menu-btn span:nth-child(1) { top: 24px; transform: rotate(45deg); }
.menu-open .menu-btn span:nth-child(2) { top: 24px; right: 12px; transform: rotate(-45deg); }

/* ---------- Kahraman (hero) ---------- */
.hero {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: 100vh; min-height: 100svh;
  background: var(--ink); color: var(--on-dark);
  display: flex; flex-direction: column;
}
.hero-main {
  flex: 1; position: relative;
  padding: 150px var(--edge) 72px calc(var(--edge) + var(--rail));
  display: flex; flex-direction: column; justify-content: flex-end;
}
.hero-kicker { color: var(--on-dark-2); display: flex; align-items: center; gap: 18px; margin-bottom: 34px; }
.hero-kicker::before { content: ""; width: 44px; height: 4px; background: var(--accent); }
.hero h1 {
  font-size: clamp(54px, 7.4vw, 112px); line-height: 1.02; font-weight: 200;
  letter-spacing: -.02em; color: var(--on-dark);
}
.hero h1 span { display: block; }
.hero h1 strong { display: block; font-weight: 600; }
.hero-sub { margin-top: 38px; max-width: 30em; font-size: clamp(16px, 1.3vw, 18px); line-height: 1.75; font-weight: 300; color: var(--on-dark-2); }
.hero-actions { margin-top: 44px; display: flex; flex-wrap: wrap; gap: 14px; }

.hero-mark {
  position: absolute; z-index: -1; pointer-events: none;
  right: calc(var(--edge) + 1vw); top: 50%;
  height: min(54vh, 40vw); aspect-ratio: 160 / 150;
  transform: translateY(-54%);
  overflow: visible;
}
.hero-mark .guide { fill: none; stroke: var(--hair-dark); stroke-width: .28; }
.hero-mark .dim { fill: none; stroke: #7c7c7c; stroke-width: .3; }
.hero-mark .dim-t { fill: #9a9a9a; font-family: "Montserrat", Arial, sans-serif; font-size: 4.2px; font-weight: 300; letter-spacing: .22em; }
.hero-mark .node { fill: var(--ink); stroke: #8a8a8a; stroke-width: .3; }
.hero-mark .mark { fill: none; stroke: var(--on-dark); stroke-width: 7; stroke-linecap: square; stroke-miterlimit: 12; }

/* antet şeridi: pafta antedinden esinli alt bilgi bandı */
.antet {
  position: relative;
  margin: 0 var(--edge); padding: 0;
  display: grid; grid-template-columns: var(--rail) 1.5fr 1fr 1fr auto;
  border-top: 1px solid var(--hair-dark);
}
.antet > div { padding: 20px 28px 26px 0; }
.antet > div + div { padding-left: 28px; border-left: 1px solid var(--hair-dark); }
.antet > div:nth-child(2) { padding-left: 0; border-left: 0; }
.antet dt, .antet .k { font-size: 9.5px; font-weight: 500; letter-spacing: .3em; text-transform: uppercase; color: var(--accent); margin-bottom: 6px; }
.antet dd, .antet .v { font-size: 13px; line-height: 1.5; color: var(--on-dark); font-weight: 400; }
.antet a:hover { text-decoration: underline; text-underline-offset: 4px; }
.antet .scroll { display: flex; align-items: center; gap: 14px; padding-right: 0; align-self: center; font-size: 9.5px; font-weight: 500; letter-spacing: .3em; text-transform: uppercase; color: var(--on-dark-2); }
.antet .scroll i { display: block; width: 1px; height: 34px; background: linear-gradient(var(--on-dark), var(--on-dark)) no-repeat top / 100% 40%, var(--hair-dark); animation: drip 2.4s var(--ease) infinite; }
@keyframes drip { 0% { background-position: 0 -14px, 0 0; } 100% { background-position: 0 34px, 0 0; } }

/* ---------- Bölüm iskeleti: dikme + taban çizgisi ---------- */
.sec { position: relative; padding: var(--sec-pad) 0; border-top: 1px solid var(--hair); background: var(--paper); }
.sec--mist { background: var(--mist); --hair: #DADAD7; }
.sec--dark { background: var(--ink); color: var(--on-dark-2); border-top-color: var(--hair-dark); --hair: var(--hair-dark); }
.sec::before { /* H dikmesi: sayfa boyunca süren düşey yapı çizgisi */
  content: ""; position: absolute; top: 0; bottom: 0; width: 1px; background: var(--hair);
  left: calc(var(--edge) + var(--rail) - var(--rail-gap));
}
.sec::after { /* kesişim düğümü */
  content: ""; position: absolute; top: -4px; width: 7px; height: 7px; border-radius: 50%;
  left: calc(var(--edge) + var(--rail) - var(--rail-gap) - 3px);
  background: var(--paper); border: 1px solid var(--accent);
}
.sec--mist::after { background: var(--mist); }
.sec--dark::after { background: var(--ink); }

.wrap { padding: 0 var(--edge); }
.sec-grid { display: grid; grid-template-columns: var(--rail) minmax(0, 1fr); }
.sec-rail { position: sticky; top: 110px; align-self: start; padding-right: calc(var(--rail-gap) + 16px); }
.sec-rail .num { display: block; font-size: 54px; line-height: 1; font-weight: 200; color: var(--rule); letter-spacing: -.02em; margin-bottom: 16px; }
.sec--dark .sec-rail .num { color: #5e5e5e; }
.sec--dark .label { color: var(--on-dark-2); }
.sec--dark .h2 { color: var(--on-dark); }
.sec--dark .lead { color: var(--on-dark-2); }

/* ---------- 01 Yaklaşım ---------- */
.intro { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(32px, 6vw, 96px); align-items: end; }
.intro .bar { margin-bottom: 0; }
.principles { margin-top: clamp(64px, 8vw, 112px); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--hair); }
.principle { padding: 36px 36px 8px 0; }
.principle + .principle { padding-left: 36px; border-left: 1px solid var(--hair); }
.principle svg { width: 100%; max-width: 220px; height: 56px; margin-bottom: 30px; overflow: visible; }
.principle svg * { fill: none; stroke: var(--ink); stroke-width: 1; vector-effect: non-scaling-stroke; }
.principle svg .thin { stroke: var(--rule); }
.principle svg .dot { fill: var(--paper); stroke: var(--accent); }
.principle h3 { font-size: 26px; line-height: 1.2; font-weight: 600; color: var(--ink); margin-bottom: 10px; letter-spacing: -.005em; }
.principle p { font-size: 15px; max-width: 22em; }

/* ---------- 02 Hizmetler ---------- */
.sec-head { display: flex; align-items: end; justify-content: space-between; gap: 40px; flex-wrap: wrap; margin-bottom: clamp(48px, 6vw, 84px); }
.sec-head .lead { max-width: 27em; }
.services { border-top: 1px solid var(--ink); }
.service {
  display: grid; grid-template-columns: 96px minmax(0, 1fr) minmax(0, 1.25fr); gap: 0 32px; align-items: baseline;
  padding: 34px 0 36px; border-bottom: 1px solid var(--rule); position: relative;
  transition: padding .5s var(--ease);
}
.service::before { content: ""; position: absolute; left: 0; bottom: -1px; height: 1px; width: 100%; background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform .7s var(--ease); }
.service:hover::before { transform: scaleX(1); }
.service .n { font-size: 34px; line-height: 1; font-weight: 200; color: var(--accent); letter-spacing: -.01em; }
.service h3 { font-size: clamp(22px, 2.1vw, 30px); line-height: 1.2; font-weight: 300; color: var(--ink); letter-spacing: -.008em; }
.service h3 strong { font-weight: 600; }
.service p { font-size: 15px; line-height: 1.75; }
.service .tags { margin-top: 12px; font-size: 10px; font-weight: 500; letter-spacing: .24em; text-transform: uppercase; color: var(--accent); line-height: 1.9; }
.service .go { align-self: center; justify-self: end; width: 28px; height: 1px; background: var(--rule); position: relative; transition: background .4s, width .4s var(--ease); }
.service .go::after { content: ""; position: absolute; right: 0; top: -3px; width: 7px; height: 7px; border-top: 1px solid var(--rule); border-right: 1px solid var(--rule); transform: rotate(45deg); transition: border-color .4s; }
.service:hover .go { background: var(--ink); width: 40px; }
.service:hover .go::after { border-color: var(--ink); }

/* ---------- 03 Projeler ---------- */
.projects { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: clamp(40px, 5vw, 72px) clamp(20px, 2.4vw, 36px); }
.project { grid-column: span 4; }
.project:nth-child(1) { grid-column: span 7; }
.project:nth-child(2) { grid-column: span 5; }
.project a { display: block; }
.ph { /* yer tutucu görsel: gerçek fotoğraf gelince <img> ile değiştirilecek */
  position: relative; overflow: hidden; aspect-ratio: 4 / 3;
  background: linear-gradient(165deg, #DEDEDC 0%, #C9C9C7 48%, #B2B2B0 100%);
}
.project:nth-child(1) .ph { aspect-ratio: 7 / 5; }
.project:nth-child(2) .ph { aspect-ratio: auto; height: 100%; min-height: 320px; }
.project:nth-child(2) a { display: flex; flex-direction: column; height: 100%; }
.project:nth-child(2) .ph { flex: 1; }
.ph > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.ph svg { position: absolute; inset: 0; width: 100%; height: 100%; transition: transform 1.2s var(--ease); }
.ph svg * { fill: none; stroke: rgba(255, 255, 255, .78); stroke-width: 1; vector-effect: non-scaling-stroke; }
.ph svg .f { stroke: rgba(255, 255, 255, .42); }
.project a:hover .ph svg { transform: scale(1.035); }
.ph .tag { position: absolute; left: 0; top: 0; padding: 10px 14px; font-size: 9px; font-weight: 500; letter-spacing: .3em; text-transform: uppercase; color: #fff; background: rgba(51, 51, 51, .38); }
.ph .idx { position: absolute; right: 16px; top: 12px; font-size: 10px; font-weight: 500; letter-spacing: .26em; color: rgba(255, 255, 255, .9); }
.project figcaption, .project .cap { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding-top: 18px; position: relative; }
.project .cap::before { content: ""; position: absolute; left: 0; top: 0; width: 36px; height: 4px; background: var(--accent); transition: width .6s var(--ease); }
.project a:hover .cap::before { width: 72px; }
.project h3 { font-size: 21px; line-height: 1.3; font-weight: 300; color: var(--ink); margin-top: 8px; }
.project h3 strong { font-weight: 600; }
.project .meta { font-size: 10px; font-weight: 500; letter-spacing: .26em; text-transform: uppercase; color: var(--text); white-space: nowrap; margin-top: 8px; }
.projects-foot { margin-top: clamp(48px, 6vw, 80px); display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; padding-top: 28px; border-top: 1px solid var(--hair); }
.note { font-size: 12.5px; line-height: 1.6; color: var(--text); max-width: 40em; }
.note b { font-size: 9.5px; letter-spacing: .28em; text-transform: uppercase; font-weight: 500; color: var(--ink); border: 1px dashed var(--accent); padding: 3px 8px; margin-right: 10px; white-space: nowrap; }

/* ---------- 04 Akustik ---------- */
.acoustic { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: clamp(40px, 6vw, 96px); align-items: center; }
.acoustic .lead { margin-top: 28px; }
.acoustic-list { margin-top: clamp(56px, 7vw, 96px); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--hair-dark); }
.acoustic-list li { padding: 26px 24px 0 0; }
.acoustic-list li + li { padding-left: 24px; border-left: 1px solid var(--hair-dark); }
.acoustic-list span { display: block; font-size: 30px; line-height: 1; font-weight: 200; color: #7a7a7a; margin-bottom: 18px; }
.acoustic-list h3 { font-size: 17px; line-height: 1.35; font-weight: 500; color: var(--on-dark); margin-bottom: 6px; }
.acoustic-list p { font-size: 14px; line-height: 1.6; color: #adadad; }
.acoustic .btn { margin-top: 44px; }
.acoustic-fig { position: relative; }
.acoustic-fig svg { width: 100%; height: auto; overflow: visible; }
.acoustic-fig .s { fill: none; stroke: var(--on-dark); stroke-width: 1.4; vector-effect: non-scaling-stroke; }
.acoustic-fig .t { fill: none; stroke: #6f6f6f; stroke-width: 1; vector-effect: non-scaling-stroke; }
.acoustic-fig .g { fill: none; stroke: var(--hair-dark); stroke-width: 1; vector-effect: non-scaling-stroke; }
.acoustic-fig .ray { fill: none; stroke: #b9b9b9; stroke-width: 1; stroke-dasharray: 5 5; animation: ray 1.6s linear infinite; }
.acoustic-fig .ray2 { fill: none; stroke: #777; stroke-width: 1; stroke-dasharray: 1.5 5; }
.acoustic-fig .src { fill: var(--on-dark); }
.acoustic-fig .ring { fill: none; stroke: #8a8a8a; stroke-width: 1; }
.acoustic-fig text { fill: #9f9f9f; font-family: "Montserrat", Arial, sans-serif; font-size: 8.5px; font-weight: 500; letter-spacing: .26em; }
.acoustic-fig figcaption { margin-top: 18px; display: flex; justify-content: space-between; gap: 16px; font-size: 9.5px; font-weight: 500; letter-spacing: .28em; text-transform: uppercase; color: var(--accent); }
@keyframes ray { to { stroke-dashoffset: -10; } }

/* ---------- 05 Süreç ---------- */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); position: relative; margin-top: clamp(56px, 7vw, 96px); }
.steps::before { content: ""; position: absolute; left: 0; right: 0; top: 3px; height: 1px; background: var(--rule); }
.step { position: relative; padding: 44px 32px 0 0; }
.step::before { content: ""; position: absolute; left: 0; top: 0; width: 7px; height: 7px; border-radius: 50%; background: var(--mist); border: 1px solid var(--ink); }
.step::after { content: ""; position: absolute; left: 3px; top: 7px; width: 1px; height: 24px; background: var(--rule); }
.step .n { font-size: 44px; line-height: 1; font-weight: 200; color: var(--accent); margin-bottom: 22px; display: block; }
.step h3 { font-size: 22px; line-height: 1.25; font-weight: 600; color: var(--ink); margin-bottom: 10px; }
.step p { font-size: 15px; max-width: 19em; }
.steps-foot { margin-top: clamp(48px, 6vw, 80px); font-size: clamp(20px, 2vw, 26px); font-weight: 300; color: var(--ink); line-height: 1.4; }
.steps-foot strong { font-weight: 600; }

/* ---------- 06 Hakkında ---------- */
.about { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(40px, 6vw, 96px); align-items: start; }
.about .ph { aspect-ratio: 4 / 5; }
.about-name { font-size: clamp(30px, 3.4vw, 46px); line-height: 1.15; font-weight: 300; color: var(--ink); letter-spacing: -.01em; }
.about-name strong { font-weight: 600; }
.about-title { margin-top: 12px; }
.about-body p { margin-top: 22px; max-width: 36em; }
.about-body p.lead { margin-top: 0; }
.facts { margin-top: 44px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--hair); }
.facts div { padding: 18px 20px 18px 0; border-bottom: 1px solid var(--hair); }
.facts dt { font-size: 9.5px; font-weight: 500; letter-spacing: .3em; text-transform: uppercase; color: var(--accent); margin-bottom: 4px; }
.facts dd { font-size: 15px; color: var(--ink); }
.about .note { margin-top: 28px; }

/* ---------- İletişim ---------- */
.contact { position: relative; }
.contact-lines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.contact-lines * { fill: none; stroke: var(--hair-dark); stroke-width: 1; vector-effect: non-scaling-stroke; }
.contact .sec-grid { position: relative; }
.contact .h2 { font-size: clamp(40px, 6.2vw, 92px); font-weight: 200; line-height: 1.05; letter-spacing: -.02em; }
.contact-top { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: clamp(32px, 5vw, 80px); align-items: end; }
.contact-top .lead { margin-bottom: 28px; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.contact-grid { margin-top: clamp(64px, 8vw, 112px); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--hair-dark); }
.contact-grid > div { padding: 26px 24px 0 0; }
.contact-grid > div + div { padding-left: 24px; border-left: 1px solid var(--hair-dark); }
.contact-grid dt { font-size: 9.5px; font-weight: 500; letter-spacing: .3em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.contact-grid dd { font-size: 17px; line-height: 1.55; color: var(--on-dark); font-weight: 300; }
.contact-grid dd a { background: linear-gradient(currentColor, currentColor) no-repeat left bottom / 0 1px; transition: background-size .5s var(--ease); padding-bottom: 2px; }
.contact-grid dd a:hover { background-size: 100% 1px; }
.contact-grid small { display: block; margin-top: 6px; font-size: 12.5px; color: #a3a3a3; font-weight: 400; }

/* ---------- Alt bilgi ---------- */
.site-foot { background: #2B2B2B; color: #a3a3a3; padding: 44px var(--edge) 40px; font-size: 12.5px; }
.foot-row { display: flex; align-items: center; justify-content: space-between; gap: 24px 40px; flex-wrap: wrap; }
.site-foot img { height: 30px; width: auto; }
.foot-nav { display: flex; flex-wrap: wrap; gap: 10px 28px; }
.foot-nav a { font-size: 10px; font-weight: 500; letter-spacing: .26em; text-transform: uppercase; padding: 6px 0; }
.site-foot a:hover { color: var(--on-dark); }
.foot-legal { margin-top: 32px; padding-top: 22px; border-top: 1px solid #3d3d3d; display: flex; justify-content: space-between; gap: 12px 32px; flex-wrap: wrap; font-size: 11.5px; letter-spacing: .04em; }

/* ---------- Giriş animasyonları ---------- */
@media (prefers-reduced-motion: no-preference) {
  .hero-mark .guide { stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 2.2s var(--ease) forwards; animation-delay: calc(var(--i, 0) * 90ms + 150ms); }
  .hero-mark .mark { stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 2.4s cubic-bezier(.6, 0, .2, 1) .9s forwards; }
  .hero-mark .dim, .hero-mark .dim-t, .hero-mark .node { opacity: 0; animation: fade 1s ease 2.6s forwards; }
  .hero-kicker, .hero h1 > *, .hero-sub, .hero-actions, .antet { opacity: 0; transform: translateY(18px); animation: rise 1.1s var(--ease) forwards; }
  .hero-kicker { animation-delay: .25s; }
  .hero h1 > :nth-child(1) { animation-delay: .4s; }
  .hero h1 > :nth-child(2) { animation-delay: .52s; }
  .hero h1 > :nth-child(3) { animation-delay: .64s; }
  .hero-sub { animation-delay: .85s; }
  .hero-actions { animation-delay: 1s; }
  .antet { animation-delay: 1.25s; transform: none; }

  .js [data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity 1s var(--ease), transform 1s var(--ease); transition-delay: calc(var(--d, 0) * 110ms); }
  .js [data-reveal].in { opacity: 1; transform: none; }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fade { to { opacity: 1; } }
@keyframes rise { to { opacity: 1; transform: none; } }
/* ---------- Kaydırmaya bağlı çizim (site.js --p, --rp, --hp değerlerini verir) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .scrolldraw .sec::before { transform: scaleY(var(--rp, 0)); transform-origin: top; background: var(--rule); }
  .scrolldraw .sec--dark::before { background: #5a5a5a; }
  .scrolldraw .sec::after { transform: scale(min(1, calc(var(--rp, 0) * 30))); }
  .scrolldraw .steps::before { transform: scaleX(var(--p, 0)); transform-origin: left; }
  .scrolldraw .principles { border-top-color: transparent; position: relative; }
  .scrolldraw .principles::before { content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 1px; background: var(--hair); transform: scaleX(var(--p, 0)); transform-origin: left; }
  .scrolldraw .contact-lines { clip-path: inset(0 0 calc((1 - var(--p, 0)) * 100%) 0); }
  .scrolldraw .acoustic-fig .ray, .scrolldraw .acoustic-fig .ray2, .scrolldraw .acoustic-fig .src, .scrolldraw .acoustic-fig text { opacity: clamp(0, calc((var(--p, 0) - .7) * 4), 1); }
  .scrolldraw .acoustic-fig svg { --p: 0; }
  .scrolldraw .principle svg .dot { opacity: clamp(0, calc((var(--p, 0) - .6) * 4), 1); }
  .scrolldraw .hero-mark.is-drawn .mark { display: none; }
  .hero-mark .mark-part { fill: none; stroke: var(--on-dark); stroke-width: 7; stroke-linecap: square; stroke-miterlimit: 12; }
  .scrolldraw .hero-mark.is-drawn .dim, .scrolldraw .hero-mark.is-drawn .dim-t, .scrolldraw .hero-mark.is-drawn .node { animation: none; opacity: clamp(0, calc(1 - var(--hp, 0) * 5), 1); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .acoustic-fig .ray, .antet .scroll i { animation: none; }
}

/* ---------- Duyarlı düzen ---------- */
@media (max-width: 1180px) {
  :root { --rail: 168px; --rail-gap: 36px; }
  .antet { grid-template-columns: var(--rail) 1.4fr 1fr 1fr; }
  .antet .scroll { display: none; }
  .service { grid-template-columns: 72px minmax(0, 1fr) minmax(0, 1.2fr); }
  .acoustic-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .acoustic-list li:nth-child(3) { padding-left: 0; border-left: 0; }
  .acoustic-list li:nth-child(n+3) { margin-top: 26px; border-top: 1px solid var(--hair-dark); }
}

@media (max-width: 900px) {
  :root { --rail: 0px; --rail-gap: 0px; }
  html { scroll-padding-top: 64px; }
  .site-head { height: 68px; }
  .site-head.is-stuck { height: 60px; }
  .brand img { height: 28px; }
  .is-stuck .brand img { height: 26px; }
  .menu-btn { display: block; z-index: 2; }
  .nav {
    position: fixed; inset: 0; z-index: 1; background: var(--ink);
    flex-direction: column; align-items: flex-start; justify-content: center; gap: 4px;
    padding: 96px var(--gutter) 48px;
    opacity: 0; visibility: hidden; transition: opacity .4s var(--ease), visibility .4s;
  }
  .nav::before { content: ""; position: absolute; left: var(--gutter); top: 0; bottom: 0; width: 1px; background: var(--hair-dark); }
  .nav a { font-size: 30px; font-weight: 200; letter-spacing: -.01em; text-transform: none; color: var(--on-dark); padding: 8px 0 8px 28px; }
  .nav a:not(.nav-cta)::after { display: none; }
  .nav .nav-cta { margin: 28px 0 0 28px; font-size: 11px; font-weight: 500; letter-spacing: .26em; text-transform: uppercase; padding: 17px 26px; }
  .menu-open .nav { opacity: 1; visibility: visible; }
  .menu-open { overflow: hidden; }
  .menu-open .site-head { background: none; box-shadow: none; backdrop-filter: none; -webkit-backdrop-filter: none; }
  .brand { position: relative; z-index: 2; }

  .hero-main { padding: 104px var(--gutter) 48px; justify-content: flex-end; }
  .hero-mark { position: relative; right: auto; top: auto; transform: none; height: auto; width: min(58vw, 300px); margin: 6px 0 clamp(36px, 6vh, 64px) 6vw; }
  .hero-mark .guide { stroke-width: .5; }
  .hero-mark .dim { stroke-width: .5; }
  .hero-mark .node { stroke-width: .5; }
  .hero h1 { font-size: clamp(50px, 15.5vw, 84px); }
  .hero-sub { margin-top: 26px; }
  .hero-actions { margin-top: 32px; }
  .antet { grid-template-columns: 1fr 1fr; margin: 0 var(--gutter); }
  .antet > div:first-child { display: none; }
  .antet > div { padding: 16px 12px 16px 0; }
  .antet > div + div { padding-left: 16px; }
  .antet > div:nth-child(2) { grid-column: 1 / -1; border-bottom: 1px solid var(--hair-dark); }
  .antet > div:nth-child(3) { padding-left: 0; border-left: 0; }

  .sec::before { left: var(--gutter); opacity: 0; }
  .sec::after { left: calc(var(--gutter) - 3px); }
  .sec-grid { display: block; }
  .sec-rail { position: static; display: flex; align-items: baseline; gap: 16px; padding: 0; margin-bottom: 36px; }
  .sec-rail .num { font-size: 40px; margin: 0; }

  .intro, .acoustic, .about, .contact-top { grid-template-columns: minmax(0, 1fr); }
  .intro { gap: 28px; }
  .principles { grid-template-columns: minmax(0, 1fr); }
  .principle, .principle + .principle { padding: 30px 0 30px; border-left: 0; border-bottom: 1px solid var(--hair); display: grid; grid-template-columns: 84px 1fr; gap: 0 24px; align-items: start; }
  .principle svg { height: 44px; margin: 6px 0 0; grid-row: span 2; }
  .principle h3 { font-size: 22px; margin-bottom: 6px; }

  .service { grid-template-columns: 52px minmax(0, 1fr); gap: 0 12px; padding: 26px 0 28px; }
  .service .n { font-size: 26px; }
  .service > div { grid-column: 2; margin-top: 10px; }

  .projects { grid-template-columns: minmax(0, 1fr); gap: 44px; }
  .project, .project:nth-child(1), .project:nth-child(2) { grid-column: auto; }
  .project:nth-child(n) .ph { aspect-ratio: 4 / 3; height: auto; min-height: 0; flex: none; }
  .project:nth-child(2) .ph { aspect-ratio: 4 / 5; }

  .acoustic-list { grid-template-columns: minmax(0, 1fr); margin-top: 44px; }
  .acoustic-list li, .acoustic-list li + li { padding: 20px 0; border-left: 0; border-bottom: 1px solid var(--hair-dark); display: grid; grid-template-columns: 44px 1fr; }
  .acoustic-list li:nth-child(n+3) { margin-top: 0; border-top: 0; }
  .acoustic-list span { font-size: 24px; margin: 0; grid-row: span 2; }
  .steps { grid-template-columns: minmax(0, 1fr); margin-top: 48px; }
  .steps::before { left: 3px; right: auto; top: 0; bottom: 0; width: 1px; height: auto; }
  .step { padding: 0 0 40px 40px; }
  .step:last-child { padding-bottom: 0; }
  .step::before { top: 14px; }
  .step::after { left: 7px; top: 17px; width: 20px; height: 1px; }
  .step .n { font-size: 36px; margin-bottom: 12px; }
  .about .ph { aspect-ratio: 1 / 1; max-width: 420px; }
  .facts { grid-template-columns: minmax(0, 1fr); }
  .contact-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .contact-grid > div { padding: 22px 12px 22px 0; border-bottom: 1px solid var(--hair-dark); }
  .contact-grid > div + div { padding-left: 16px; }
  .contact-grid > div:nth-child(odd) { padding-left: 0; border-left: 0; }
  .contact-grid dd { font-size: 15px; overflow-wrap: anywhere; }
  .foot-legal { flex-direction: column; }
}

@media (max-width: 520px) {
  .btn { width: 100%; justify-content: space-between; }
  .contact-grid { grid-template-columns: minmax(0, 1fr); }
  .contact-grid > div, .contact-grid > div + div { padding-left: 0; border-left: 0; }
  .project .cap { flex-direction: column; gap: 0; }
  .project .meta { margin-top: 4px; }
}

@media print {
  .site-head, .antet .scroll { display: none; }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
}
.project .soon { display: block; }