/* Cade — kapı sayfası. Uzak yazı tipi, sayaç ve izleme kodu yoktur. */

:root {
  --paper: #f2f1ec;
  --paper-raised: #fbfaf7;
  --paper-sunk: #eceae3;
  --ink: #101a16;
  --ink-2: #3b4842;
  --ink-3: #6e7a74;
  --line: #d6d9d1;
  --line-soft: #e3e5de;
  --line-strong: #b6bbb2;

  --blueprint: #153d33;
  --blueprint-deep: #0e2a23;
  --blueprint-ink: #d8e2dc;

  --green: #157a55;
  --yellow: #a96f05;
  --blue: #2563eb;
  --red: #b64035;

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --display: "Segoe UI Variable Display", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;

  --gutter: clamp(20px, 5vw, 64px);
  --measure: 62ch;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.62;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 600;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
em { font-style: normal; font-weight: 600; }
strong { font-weight: 650; }

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, currentColor 35%, transparent);
}
a:hover { text-decoration-color: currentColor; }

:focus-visible {
  outline: 2px solid var(--blueprint);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 50;
  background: var(--blueprint);
  color: #fff;
  padding: 10px 16px;
  font: 500 14px/1 var(--sans);
}
.skip:focus { left: 12px; }

.sep { color: var(--line-strong); padding-inline: .35em; }

.mono-inline {
  font-family: var(--mono);
  font-size: .88em;
  letter-spacing: -.01em;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- masthead ---------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.masthead-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 62px;
}

.masthead-end {
  display: flex;
  align-items: center;
  gap: 18px;
}

.lang {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--line-strong);
  flex: none;
}
.lang button {
  appearance: none;
  margin: 0;
  border: 0;
  background: transparent;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  padding: 6px 10px;
  cursor: pointer;
  line-height: 1;
}
.lang button + button {
  border-left: 1px solid var(--line-strong);
}
.lang button[aria-pressed="true"] {
  background: var(--blueprint);
  color: #fff;
}
.lang button:hover:not([aria-pressed="true"]) {
  color: var(--ink);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -.015em;
  text-decoration: none;
  color: var(--blueprint);
}
.wordmark-glyph { display: inline-flex; color: var(--blueprint); }

.masthead-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14.5px;
  color: var(--ink-2);
}
.masthead-nav a { text-decoration: none; }
.masthead-nav a:hover { color: var(--ink); text-decoration: underline; }

.nav-cta {
  border: 1px solid var(--line-strong);
  padding: 6px 14px;
  color: var(--blueprint);
  font-weight: 550;
}
.nav-cta:hover {
  background: var(--blueprint);
  border-color: var(--blueprint);
  color: #fff;
  text-decoration: none;
}

/* ---------- hero ---------- */

.hero {
  padding-top: clamp(56px, 9vw, 104px);
  padding-bottom: clamp(48px, 7vw, 88px);
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  margin-top: 22px;
  font-size: clamp(2.45rem, 6.1vw, 4.35rem);
  line-height: .98;
  letter-spacing: -.038em;
}

.lead {
  margin-top: 26px;
  max-width: var(--measure);
  font-size: clamp(1.02rem, 1.4vw, 1.18rem);
  line-height: 1.58;
  color: var(--ink-2);
}

.cta-block {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--blueprint);
  padding: 13px 22px;
  font: 550 15.5px/1 var(--sans);
  text-decoration: none;
  transition: background .16s ease, color .16s ease, transform .16s ease;
}
.btn-primary { background: var(--blueprint); color: #fff; }
.btn-primary:hover { background: var(--blueprint-deep); border-color: var(--blueprint-deep); }
.btn-primary:active { transform: translateY(1px); }
.btn-lg { padding: 16px 28px; font-size: 16.5px; }
.btn-icon { flex: none; }

.cta-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  margin: 0;
}
.cta-meta div { display: flex; flex-direction: column; gap: 2px; }
.cta-meta dt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.cta-meta dd { margin: 0; font-size: 14.5px; color: var(--ink); }

/* ---------- artifact ---------- */

.artifact {
  position: relative;
  margin: clamp(48px, 7vw, 76px) 0 0;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px -40px rgba(16, 40, 32, .5);
}

.artifact::before,
.artifact::after {
  content: "";
  position: absolute;
  width: 13px; height: 13px;
  border: 1px solid var(--line-strong);
  pointer-events: none;
}
.artifact::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.artifact::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.artifact-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-sunk);
}

.stamp {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--yellow);
  border: 1px solid color-mix(in srgb, var(--yellow) 45%, transparent);
  background: color-mix(in srgb, var(--yellow) 9%, transparent);
  padding: 4px 10px;
}

.artifact-route {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.artifact-body {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
}

.artifact-pane { padding: clamp(20px, 2.6vw, 30px); min-width: 0; }
.pane-drawing { border-right: 1px solid var(--line); background:
  linear-gradient(var(--line-soft) 1px, transparent 1px) 0 0 / 100% 34px,
  linear-gradient(90deg, var(--line-soft) 1px, transparent 1px) 0 0 / 34px 100%,
  var(--paper-raised);
}

.pane-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.pane-file, .pane-step { color: var(--ink-2); letter-spacing: .06em; text-transform: none; }

.drawing {
  display: block;
  width: 100%;
  height: auto;
  color: var(--blueprint);
}
.d-solid { fill: none; stroke: currentColor; stroke-width: 1.5; }
.d-solid rect { fill: color-mix(in srgb, var(--blueprint) 6%, transparent); }
.d-solid circle:not(:first-child) { fill: var(--paper-raised); }
.d-center { fill: none; stroke: currentColor; stroke-width: .7; stroke-dasharray: 9 3 2 3; opacity: .55; }
.d-hidden { fill: none; stroke: currentColor; stroke-width: .8; stroke-dasharray: 5 4; opacity: .45; }
.d-dim { fill: none; stroke: currentColor; stroke-width: .8; opacity: .8; }
.d-text {
  font-family: var(--mono);
  font-size: 13px;
  fill: var(--blueprint);
}
.d-note {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .14em;
  fill: var(--ink-3);
}

.review {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}
.review th, .review td {
  text-align: left;
  padding: 11px 8px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: baseline;
}
.review thead th {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-top: 0;
  border-bottom-color: var(--line);
}
.review tbody th {
  font-weight: 550;
  color: var(--ink);
}
.review tbody th span {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: .04em;
  color: var(--ink-3);
  margin-top: 3px;
}
.review .num {
  font-family: var(--mono);
  font-size: 14px;
  white-space: nowrap;
}
.review .num.empty { color: var(--ink-3); }
.review td:last-child { text-align: right; }

.decision {
  display: inline-block;
  min-width: 92px;
  text-align: center;
  font-size: 12.5px;
  padding: 5px 12px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink-2);
}
.decision.is-edit { border-color: color-mix(in srgb, var(--yellow) 55%, transparent); color: var(--yellow); }
.decision.is-none { border-color: color-mix(in srgb, var(--red) 45%, transparent); color: var(--red); }

.review-ack {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 20px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--ink-2);
}
.tick {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px; height: 16px;
  margin-top: 2px;
  background: var(--blueprint);
  color: #fff;
}
.review-action {
  margin-top: 16px;
  font-size: 13.5px;
  font-weight: 550;
  color: var(--blueprint);
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.artifact figcaption {
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  background: var(--paper-sunk);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-3);
  max-width: 78ch;
}

/* ---------- sections ---------- */

.band {
  padding-block: clamp(56px, 8vw, 104px);
  border-bottom: 1px solid var(--line);
}
.band-alt { background: var(--paper-sunk); }

.section-grid {
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
}

.section-mark {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: sticky;
  top: 92px;
  align-self: start;
  border-top: 2px solid var(--ink);
  padding-top: 12px;
}
.idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ink);
}
.mark-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.section-body h2 {
  font-size: clamp(1.65rem, 3.1vw, 2.4rem);
  line-height: 1.08;
  letter-spacing: -.028em;
  max-width: 22ch;
}
.section-lead {
  margin-top: 18px;
  max-width: var(--measure);
  color: var(--ink-2);
  font-size: 1.03rem;
}

/* steps */

.steps {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  border-top: 1px solid var(--line);
}
.steps li {
  padding: 22px 22px 26px 0;
  border-bottom: 1px solid var(--line);
}
.step-no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-3);
}
.steps h3 {
  margin-top: 10px;
  font-size: 1.06rem;
  letter-spacing: -.012em;
}
.steps p {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-2);
}

/* signals */

.signals {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.sig {
  background: var(--paper-raised);
  padding: 22px 20px 24px;
  border-top: 3px solid var(--sig, var(--ink-3));
}
.sig-green { --sig: var(--green); }
.sig-blue { --sig: var(--blue); }
.sig-yellow { --sig: var(--yellow); }
.sig-red { --sig: var(--red); }

.sig-key {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--sig);
}
.sig-name {
  margin-top: 8px;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: -.012em;
}
.sig p:last-child {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-2);
}

/* callout */

.callout {
  margin-top: 36px;
  padding: 24px 26px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--yellow);
  max-width: 72ch;
}
.callout-key {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--yellow);
  margin-bottom: 10px;
}
.callout p:not(.callout-key) { font-size: 15px; line-height: 1.6; color: var(--ink-2); }
.callout strong { color: var(--ink); }

.callout-open { border-left-color: var(--blueprint); }
.callout-open .callout-key { color: var(--blueprint); }
.open-list { display: grid; gap: 10px; }
.open-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
}
.open-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .62em;
  width: 9px; height: 1px;
  background: var(--line-strong);
}
.open-why {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--ink-3);
}

.axiom {
  margin-top: 32px;
  max-width: 60ch;
  font-family: var(--display);
  font-size: clamp(1.05rem, 1.7vw, 1.24rem);
  line-height: 1.45;
  letter-spacing: -.014em;
  color: var(--ink);
  border-left: 2px solid var(--line-strong);
  padding-left: 20px;
}

/* scope */

.scope {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.scope-col { background: var(--paper-raised); padding: 24px 24px 28px; }
.scope-head {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  padding-bottom: 14px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.scope-in { color: var(--green); }
.scope-out { color: var(--red); }
.scope-col li {
  position: relative;
  padding-left: 22px;
  padding-block: 7px;
  font-size: 15px;
  line-height: 1.5;
}
.scope-col li span { color: var(--ink-3); font-size: 13.5px; }
.scope-col li::before {
  content: "";
  position: absolute;
  left: 0; top: 1.02em;
  width: 10px; height: 1px;
  background: var(--line-strong);
}

/* metrics */

.metrics {
  margin: 40px 0 0;
  border-top: 1px solid var(--line-strong);
}
.metrics > div {
  display: grid;
  grid-template-columns: minmax(0, 26ch) minmax(0, 1fr);
  gap: 12px clamp(20px, 4vw, 48px);
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}
.metrics dt {
  font-size: 14px;
  letter-spacing: .01em;
  color: var(--ink-3);
}
.m-val {
  display: block;
  font-family: var(--display);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 600;
  letter-spacing: -.03em;
  color: var(--ink);
  margin-bottom: 2px;
}
.metrics dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.58;
  color: var(--ink-2);
  max-width: 58ch;
}

/* ink band */

.band-ink {
  background: var(--blueprint-deep);
  color: var(--blueprint-ink);
  border-bottom-color: var(--blueprint-deep);
}
.band-ink h2 { color: #fff; }
.band-ink .section-mark { border-top-color: color-mix(in srgb, #fff 45%, transparent); }
.band-ink .idx { color: #fff; }
.band-ink .mark-label,
.band-ink .section-lead { color: color-mix(in srgb, var(--blueprint-ink) 78%, transparent); }
.band-ink .mono-inline { color: #fff; }

.privacy {
  margin-top: 36px;
  display: grid;
  gap: 1px;
  background: color-mix(in srgb, #fff 12%, transparent);
  border: 1px solid color-mix(in srgb, #fff 14%, transparent);
  max-width: 74ch;
}
.privacy li {
  background: var(--blueprint-deep);
  padding: 15px 20px;
  font-size: 15px;
  color: var(--blueprint-ink);
}

.axiom-ink {
  color: #fff;
  border-left-color: color-mix(in srgb, #fff 35%, transparent);
}

/* download */

.band-download { background: var(--paper-sunk); border-bottom: 0; }
.dl-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
.dl-main h2 {
  margin-top: 14px;
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  letter-spacing: -.03em;
  line-height: 1.06;
}
.dl-steps {
  margin: 26px 0 32px;
  display: grid;
  gap: 12px;
  max-width: 46ch;
}
.dl-steps li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 15.5px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.dl-steps li span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
}

.hash {
  margin-top: 26px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: .01em;
  color: var(--ink-2);
  word-break: break-all;
  max-width: 52ch;
}
.hash span {
  display: block;
  letter-spacing: .18em;
  color: var(--ink-3);
}
.dl-note {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-3);
  max-width: 52ch;
}

.dl-side { display: grid; gap: 20px; }
.dl-card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 22px 22px 24px;
}
.dl-list { display: grid; gap: 10px; }
.dl-list li {
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ink-2);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}
.dl-list li:last-child { border-bottom: 0; padding-bottom: 0; }

/* footer */

.footer {
  background: var(--paper);
  border-top: 1px solid var(--line);
  padding-block: 34px 44px;
}
.footer-in {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 32px;
}
.footer-mark {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blueprint);
}
.footer-note {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-3);
  max-width: 56ch;
}
.footer-year {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
}

/* ---------- responsive ---------- */

@media (max-width: 1060px) {
  .section-grid { grid-template-columns: 120px minmax(0, 1fr); }
  .dl-grid { grid-template-columns: 1fr; }
  .dl-side { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
}

@media (max-width: 880px) {
  body { font-size: 16.5px; }
  .masthead-nav { gap: 18px; font-size: 14px; }
  .masthead-nav a:not(.nav-cta) { display: none; }
  .artifact-body { grid-template-columns: 1fr; }
  .pane-drawing { border-right: 0; border-bottom: 1px solid var(--line); }
  .section-grid { grid-template-columns: 1fr; gap: 22px; }
  .section-mark {
    position: static;
    flex-direction: row;
    align-items: baseline;
    gap: 14px;
    padding-top: 10px;
  }
  .section-body h2 { max-width: none; }
  .metrics > div { grid-template-columns: 1fr; gap: 6px; }
}

@media (max-width: 560px) {
  .hero h1 { font-size: 2.05rem; letter-spacing: -.03em; }
  .hero h1 br { display: none; }
  .cta-block { gap: 18px; }
  .cta-meta { gap: 8px 22px; }
  .artifact-pane { padding: 16px 14px 20px; }
  .artifact-head { flex-wrap: wrap; gap: 8px; }
  .review { font-size: 13.5px; }
  .review th, .review td { padding: 9px 3px; }
  .review tbody th span { font-size: 10px; }
  .review .num { font-size: 12.5px; }
  .decision { min-width: 0; font-size: 11px; padding: 4px 7px; }
  .steps li { padding-right: 0; }
  .footer-in { flex-direction: column; }
}

@media (max-width: 380px) {
  .review thead { display: none; }
  .review .num { white-space: normal; }
}

@media print {
  .masthead, .skip { display: none; }
  body { background: #fff; font-size: 11pt; }
  .band { break-inside: avoid; }
}