/* ------------------------------------------------------------------
   Arcus başvuru sitesi (arcus.custofaber.com).
   Sayfanın kendisi tanıtım sitelerinin dilindedir: sıcak zemin, mürekkep,
   köşesiz düğmeler, çizgiyle ayrılan satırlar. Örnekler ise ürünün kullandığı
   arcus-tokens.css ve arcus-components.css ile çizilir.
   Tema: sistem tercihi; html[data-theme] ile zorlanır (tokens.css ile aynı kural).
   Kiremit (--key) yalnızca logoda ve seçili menü kamasında.
   ------------------------------------------------------------------ */
:root{
  --g:#F2F1EE; --paper:#FAF9F7; --ink:#2B2A28; --muted:#5E5B55; --line:#D6D1C7; --line-2:#E6E2DA; --key:#B5532E;
  --on-ink:#F2F1EE;
  --sans:Manrope,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --max:1160px; --gut:clamp(20px,4vw,40px);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --g:#1C1B19; --paper:#252421; --ink:#ECE9E3; --muted:#B3AEA4; --line:#3E3C38; --line-2:#2E2D2A; --key:#D27A55; --on-ink:#1C1B19;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --g:#1C1B19; --paper:#252421; --ink:#ECE9E3; --muted:#B3AEA4; --line:#3E3C38; --line-2:#2E2D2A; --key:#D27A55; --on-ink:#1C1B19;
  color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--g);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit}
p{margin:0}
svg{display:block}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.08;letter-spacing:-0.025em;text-wrap:balance}
code,.mono{font-family:var(--mono);font-size:.9em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.muted{color:var(--muted)}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--on-ink);padding:8px 14px;z-index:50}
.skip:focus{left:8px}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}}

/* ---------- başlık çubuğu ---------- */
#hdr{position:sticky;top:0;z-index:30;background:color-mix(in srgb,var(--g) 94%,transparent);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--ink);margin-right:auto}
.brand svg{height:32px;width:113px}
.brand .sub{padding-left:14px;border-left:2px solid var(--ink);font-weight:700;font-size:19px;line-height:1.1;letter-spacing:-0.015em}
.links{display:flex;align-items:center;gap:20px}
.links a{position:relative;text-decoration:none;color:var(--muted);font-weight:500;font-size:15px;padding:6px 0}
.links a:hover{color:var(--ink)}
.links a.active{color:var(--ink);font-weight:700}
/* Seçili konum kaması: kiremidin izinli iki kullanımından biri. */
.links a.active::before{content:"";position:absolute;left:-13px;top:50%;margin-top:-5px;width:7px;height:10px;background:var(--key);clip-path:polygon(0 0,100% 12%,100% 88%,0 100%)}
.tools{display:flex;align-items:center;gap:6px}
.lang{display:flex;gap:2px}
.lang a{font-size:13px;font-weight:700;color:var(--muted);text-decoration:none;padding:6px;min-height:36px;display:inline-flex;align-items:center}
.lang a[aria-current="true"]{color:var(--ink);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:6px}
.theme{font:inherit;font-size:14px;font-weight:700;border:2px solid var(--ink);background:none;color:var(--ink);padding:0 12px;min-height:38px;cursor:pointer;display:inline-flex;align-items:center;gap:8px}
.theme:hover{background:var(--ink);color:var(--on-ink)}
.theme i{width:12px;height:12px;border:2px solid currentColor;border-radius:50%;background:linear-gradient(90deg,currentColor 50%,transparent 50%)}
.menu{display:none;font:inherit;font-weight:700;font-size:15px;border:1px solid var(--ink);background:none;color:var(--ink);padding:0 14px;min-height:38px;cursor:pointer}

/* ---------- düğmeler ve bağlantılar (tanıtım sitesi dili: köşesiz, mürekkep) ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;font:inherit;font-weight:700;font-size:16px;text-decoration:none;border:2px solid var(--ink);background:var(--ink);color:var(--on-ink);border-radius:0;cursor:pointer;transition:background .15s,color .15s}
.btn:hover{background:var(--muted);border-color:var(--muted)}
.btn.line{background:none;color:var(--ink)}
.btn.line:hover{background:var(--ink);color:var(--on-ink);border-color:var(--ink)}
.btn.sm{min-height:38px;padding:0 14px;font-size:14px}
.textlink{font-weight:700;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:5px}
.textlink:hover{color:var(--muted)}
.actions{display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center}

/* ---------- giriş: kemer ---------- */
.hero{padding:clamp(40px,6vw,72px) 0 0}
.hero-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,25rem);gap:28px 64px;align-items:end}
.hero h1{font-size:clamp(44px,6.6vw,88px);letter-spacing:-0.045em;line-height:.98;max-width:12ch}
.hero .lead{font-size:clamp(17px,1.5vw,19px);color:var(--muted);max-width:46ch;margin-bottom:22px}
.arch-zone{margin-top:clamp(20px,3vw,36px);border-bottom:2px solid var(--ink)}
.arch{display:block;width:100%;max-width:1000px;height:auto;margin:0 auto;overflow:visible}
.arch .stone{cursor:pointer;outline:none}
.arch .stone path{stroke:var(--ar-line-strong);stroke-width:1.5;transition:transform .25s ease}
.arch .stone text{font-family:var(--sans);font-size:20px;font-weight:700;text-anchor:middle;dominant-baseline:central;pointer-events:none;transition:transform .25s ease}
.arch .stone.on path,.arch .stone.on text,.arch .stone:hover path,.arch .stone:hover text,.arch .stone:focus-visible path,.arch .stone:focus-visible text{transform:translate(var(--dx),var(--dy))}
.arch .stone:focus-visible path{stroke:var(--ink);stroke-width:4}
.arch .key path{stroke:none}
.cap-name{font-family:var(--sans);font-size:24px;font-weight:700;fill:var(--ink);text-anchor:middle;letter-spacing:-0.02em}
.cap-token{font-family:var(--mono);font-size:17px;fill:var(--muted);text-anchor:middle}
.cap-use{font-family:var(--sans);font-size:16px;fill:var(--muted);text-anchor:middle}
.arch-note{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;padding:14px 0 18px;font-size:15px;color:var(--muted)}

/* ---------- bölümler ---------- */
section.block{padding:clamp(72px,9vw,112px) 0;border-bottom:2px solid var(--ink)}
section.block:last-of-type{border-bottom:0}
.head{display:grid;grid-template-columns:minmax(0,22rem) minmax(0,1fr);gap:16px clamp(32px,6vw,88px);margin-bottom:clamp(36px,5vw,52px);align-items:end}
.head h2{font-size:clamp(32px,4vw,52px);letter-spacing:-0.035em}
.head p{color:var(--muted);max-width:56ch}
h3.sub{font-size:22px;letter-spacing:-0.015em;margin:44px 0 6px}
h3.sub:first-child{margin-top:0}
.sub-lead{color:var(--muted);max-width:60ch;margin-bottom:16px;font-size:16px}

/* Kural satırı: kalın çizgi, solda başlık sağda açıklama */
.rules{list-style:none;margin:0;padding:0;border-bottom:2px solid var(--ink)}
.rule{display:grid;grid-template-columns:minmax(0,17rem) minmax(0,1fr);gap:8px 40px;padding:24px 0;border-top:2px solid var(--ink)}
.rule h3{font-size:clamp(20px,2vw,24px);letter-spacing:-0.02em}
.rule p{color:var(--muted);max-width:60ch}
.rule .eg{display:block;margin-top:8px;color:var(--ink);font-weight:700;font-size:15px}

/* ---------- renk tablosu ---------- */
.colors{width:100%;border-collapse:collapse;font-size:15px}
.colors th{text-align:left;font-size:13px;font-weight:700;color:var(--muted);padding:0 16px 10px 0;border-bottom:2px solid var(--ink);white-space:nowrap}
.colors td{padding:14px 16px 14px 0;border-bottom:1px solid var(--line);vertical-align:top}
.colors td:first-child{width:76px}
.colors .nm{font-weight:700;display:block}
.colors .tk{font-family:var(--mono);font-size:13px;color:var(--muted)}
.colors .hex{font-family:var(--mono);font-size:13.5px;white-space:nowrap}
.colors .use{color:var(--muted);max-width:40ch}
.colors .cr{white-space:nowrap;font-size:14px}
.colors .cr b{font-weight:700}
.colors .cr .no{color:var(--muted)}
.colors tr:target td{background:var(--line-2)}
/* Örnek taşı: sol yarı açık tema değeri, sağ yarı koyu tema değeri. Temadan bağımsız. */
.sw{display:block;width:60px;height:40px;border:1px solid var(--line);background:linear-gradient(90deg,var(--l) 50%,var(--d) 50%)}
.sw.one{background:var(--l)}
.keyrule{display:grid;grid-template-columns:auto minmax(0,1fr);gap:20px;align-items:start;margin-top:28px;padding:22px 0;border-top:2px solid var(--ink);border-bottom:2px solid var(--ink)}
.keyrule svg{width:42px;height:56px}
.keyrule h3{font-size:22px;letter-spacing:-0.015em}
.keyrule p{color:var(--muted);margin-top:6px;max-width:64ch}
.accent{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px 48px;align-items:center;margin-top:12px}
.seg{display:flex;flex-wrap:wrap;gap:0}
.seg button{font:inherit;font-size:15px;font-weight:600;padding:0 16px;min-height:42px;border:1px solid var(--ink);margin-left:-1px;background:none;color:var(--ink);cursor:pointer}
.seg button:first-child{margin-left:0}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--on-ink)}

/* ---------- örnek alanı: ürünün kendi zemini ve bileşenleri ---------- */
.spec{border:1px solid var(--ar-line);padding:clamp(18px,3vw,28px);min-width:0}
.spec-cap{display:block;font-size:13.5px;color:var(--muted);margin-top:8px}
.row-spec{display:flex;flex-wrap:wrap;gap:10px 12px;align-items:center}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px 40px}
.gray-toggle{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:15px;cursor:pointer;margin-bottom:14px}
.gray-toggle input{width:20px;height:20px;accent-color:var(--ink);margin:0}
.spec.gray{filter:grayscale(1)}
.big-status .ar-status{font-size:15px;padding:.3rem .7rem .3rem .5rem}
.big-status .ar-status svg{width:1.05rem;height:1.05rem}
.shape-list{list-style:none;margin:16px 0 0;padding:0;border-top:1px solid var(--line)}
.shape-list li{display:grid;grid-template-columns:8rem minmax(0,1fr);gap:16px;padding:10px 0;border-bottom:1px solid var(--line);font-size:15.5px}
.shape-list b{font-weight:700}
.shape-list span{color:var(--muted)}

/* ---------- yazı ---------- */
.specimen{font-size:clamp(56px,9vw,120px);font-weight:700;letter-spacing:-0.05em;line-height:.95;margin:0 0 6px}
.glyphs{font-size:clamp(20px,2.4vw,28px);color:var(--muted);letter-spacing:-0.01em;margin-bottom:28px}
.scale{width:100%;border-collapse:collapse}
.scale td{padding:12px 16px 12px 0;border-bottom:1px solid var(--line);vertical-align:baseline}
.scale td:first-child{width:9rem;font-family:var(--mono);font-size:13px;color:var(--muted);white-space:nowrap}
.scale td:nth-child(2){width:5rem;font-family:var(--mono);font-size:13px;color:var(--muted)}
.scale td:last-child{line-height:1.25;overflow-wrap:anywhere}
.monos{display:flex;flex-wrap:wrap;gap:8px 28px;margin-top:20px;font-size:15px}
.monos code{font-size:15px}

/* ---------- logo ---------- */
.logos{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px clamp(24px,4vw,48px)}
.logo-tile{border-top:2px solid var(--ink);padding-top:16px}
.logo-tile .stage{height:120px;display:flex;align-items:center;justify-content:flex-start;color:var(--ink)}
.logo-tile .stage svg.word{height:42px;width:149px}
.logo-tile .stage .icon-alone{width:56px;height:56px}
.logo-tile .stage .split{font-family:Georgia,"Times New Roman",serif;font-size:34px;letter-spacing:.01em}
.logo-tile h3{font-size:19px;margin:12px 0 6px;letter-spacing:-0.01em}
.logo-tile p{color:var(--muted);font-size:15.5px}
.logo-tile.bad .stage{position:relative}
.logo-tile.bad .stage::after{content:"";position:absolute;left:-4px;right:30%;top:50%;height:3px;background:var(--ar-critical);transform:rotate(-8deg)}
.shell-sketch{display:grid;grid-template-columns:11rem minmax(0,1fr);height:220px;margin-top:8px}
.shell-sketch .side{display:flex;flex-direction:column;justify-content:space-between;padding:14px}
.shell-sketch .org{display:flex;align-items:center;gap:10px;font-weight:700;font-size:var(--ar-text-sm)}
.shell-sketch .org i{width:30px;height:30px;border-radius:50%;border:1px dashed var(--ar-line-strong);display:block}
.shell-sketch .main{padding:14px;display:grid;gap:10px;align-content:start}
.shell-sketch .main i{display:block;height:10px;background:var(--ar-surface-sunk)}
.shell-sketch .main i:nth-child(1){width:40%;height:14px;background:var(--ar-line)}
.shell-sketch .main i:nth-child(3){width:80%}

/* ---------- dosyalar ---------- */
.files{list-style:none;margin:0;padding:0;border-bottom:2px solid var(--ink)}
.files li{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px 24px;align-items:center;padding:20px 0;border-top:2px solid var(--ink)}
.files h3{font-family:var(--mono);font-size:18px;font-weight:600;letter-spacing:0}
.files p{color:var(--muted);font-size:15.5px;margin-top:4px;max-width:60ch}
.files .actions{gap:10px}
pre.code{margin:24px 0 0;padding:18px 20px;background:var(--paper);border:1px solid var(--line);overflow-x:auto;font-family:var(--mono);font-size:14px;line-height:1.6}
.copied{font-size:14px;color:var(--muted);min-height:1.4em;margin-top:10px}

/* ---------- alt bilgi ---------- */
footer{border-top:2px solid var(--ink);padding:36px 0 44px;color:var(--muted);font-size:14.5px}
.foot{display:flex;flex-wrap:wrap;gap:12px 28px;align-items:center}
.foot svg{height:24px;width:85px;color:var(--ink);margin-right:auto}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--ink)}

/* ---------- 404 ---------- */
.nf{padding:clamp(80px,12vw,160px) 0;min-height:60vh}
.nf h1{font-size:clamp(40px,6vw,72px);letter-spacing:-0.04em;max-width:14ch}
.nf p{color:var(--muted);margin:18px 0 28px;max-width:46ch}

/* ---------- dar ekranlar ---------- */
@media (max-width:1000px){
  .hero-row,.head,.grid2,.accent{grid-template-columns:minmax(0,1fr)}
  .rule{grid-template-columns:minmax(0,1fr)}
  .logos{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:860px){
  .menu{display:inline-flex;align-items:center}
  .links{display:none;position:absolute;left:0;right:0;top:72px;background:var(--g);border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:2px;padding:10px var(--gut) 18px}
  .links.open{display:flex}
  .links a{font-size:17px;padding:8px 0}
  .theme span{display:none}
  .brand svg{height:27px;width:96px}
  .brand .sub{padding-left:11px;font-size:17px}
  .nav{gap:10px}
}
@media (max-width:700px){
  .colors thead{display:none}
  .colors,.colors tbody,.colors tr,.colors td{display:block;width:100%}
  .colors tr{display:grid;grid-template-columns:72px minmax(0,1fr);gap:4px 14px;padding:14px 0;border-bottom:1px solid var(--line)}
  .colors td{border:0;padding:0}
  .colors td:first-child{grid-row:span 4;width:auto}
  .shell-sketch{grid-template-columns:8rem minmax(0,1fr)}
  .shape-list li{grid-template-columns:minmax(0,1fr);gap:2px}
  .files li{grid-template-columns:minmax(0,1fr)}
  .arch-note{font-size:14px}
}
@media (max-width:420px){
  .lang a{padding:6px 4px}
  .scale td:nth-child(2){display:none}
}

/* Sütun genişlikleri bütün renk tablolarında aynı kalsın. */
.colors{table-layout:fixed}
.colors th:nth-child(1){width:76px}.colors th:nth-child(2){width:24%}.colors th:nth-child(3),.colors th:nth-child(4){width:9.5%}.colors th:nth-child(6){width:13rem}
.colors .use code,.sub-lead code,.spec-cap code,.rule code{font-size:.88em}
.glyphs{margin-top:14px}
.grid2.gap-top{margin-top:20px}
/* Dar ekranda kemer yazısı küçülür; taşın bilgisi kemerin altında da yazılır. */
.arch-cap{display:none}
@media (max-width:700px){
  .arch .cap-name,.arch .cap-token,.arch .cap-use{display:none}
  .arch-cap{display:block;text-align:center;margin:10px 0 0;font-size:15px}
  .arch-cap b{display:block;font-size:18px}
  .arch-cap code{display:block;color:var(--muted)}
  .colors td:nth-child(n+2){grid-column:2}
  .colors td.hex{display:inline-block;width:auto}
}