:root {
  color-scheme: light;
  --bg: #f5f3ed;
  --paper: #fffefa;
  --text: #202c28;
  --muted: #58615b;
  --line: #d4d7cd;
  --accent: #355b49;
  --soft: #e9ece3;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--sans); line-height: 1.65; -webkit-font-smoothing: antialiased; }
[hidden] { display: none !important; }
html[lang="tr"] [data-i18n="en"], html[lang="en"] [data-i18n="tr"], html[lang="tr"] .copy[lang="en"], html[lang="en"] .copy[lang="tr"] { display: none !important; }
a { color: inherit; text-underline-offset: .25em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }
button, summary { cursor: pointer; }
button { font: inherit; font-size: .78rem; border: 1px solid var(--line); border-radius: 2px; background: transparent; color: var(--text); padding: .55rem .8rem; min-height: 40px; }
button:hover { border-color: var(--accent); }
button:disabled { opacity: .4; cursor: default; }
button[aria-pressed="true"] { color: var(--paper); background: var(--accent); border-color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
.skip { position: fixed; top: -80px; left: 12px; z-index: 100; background: var(--paper); padding: 14px; }
.skip:focus { top: 8px; }
.topbar { min-height: 88px; position: sticky; top: 0; z-index: 20; background: var(--bg); border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 16px max(28px, calc((100vw - 1200px) / 2)); }
.brand { text-decoration: none; white-space: nowrap; line-height: 1; }
.wordmark { font-size: 2rem; font-weight: 650; letter-spacing: -.075em; }
.wordmark-period { color: var(--accent); }
.primary-nav { display: flex; align-items: center; gap: 32px; margin-left: auto; }
.primary-nav a { text-decoration: none; font-size: .81rem; padding: 8px 0; }
.primary-nav a:hover { text-decoration: underline; }
.header-controls, .toggle { display: flex; align-items: center; gap: 2px; }
.header-controls { gap: 20px; }
.toggle button { border: 0; padding: .4rem .5rem; background: transparent; }
.toggle button[aria-pressed="true"] { color: var(--text); text-decoration: underline; text-underline-offset: 5px; }
.view-tools { position: relative; }
.view-tools > summary { font-size: .74rem; color: var(--muted); padding: 10px 0; }
.view-tools-panel { position: absolute; right: 0; top: 44px; display: grid; gap: 12px; background: var(--paper); border: 1px solid var(--line); padding: 18px; min-width: 180px; }
.layout { max-width: 1256px; padding: 0 28px; margin: auto; }
aside { border-bottom: 1px solid var(--line); }
.contents { padding: 11px 0; }
.contents > summary { width: fit-content; font-size: .71rem; color: var(--muted); letter-spacing: .04em; padding: 6px 0; }
.contents nav { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px 24px; padding: 22px 0; }
.contents nav a { display: flex; align-items: baseline; gap: 9px; font-size: .77rem; text-decoration: none; }
.contents nav a:hover, .contents nav a[aria-current="location"] { text-decoration: underline; }
.nav-number { color: var(--muted); font-size: .65rem; font-variant-numeric: tabular-nums; }
.source-links { display: flex; flex-wrap: wrap; gap: 24px; border-top: 1px solid var(--line); padding: 16px 0 4px; font-size: .72rem; color: var(--muted); }
.source-details p { margin: 8px 0; }
main { min-width: 0; }
.section { scroll-margin-top: 105px; padding: 84px 0 90px; border-bottom: 1px solid var(--line); }
.section-meta { display: flex; align-items: baseline; gap: 14px; margin-bottom: 28px; color: var(--accent); font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
.section-number { color: var(--muted); font-variant-numeric: tabular-nums; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2 { font-family: var(--serif); font-weight: 400; text-wrap: balance; }
h1 { font-size: clamp(3.4rem, 7.5vw, 6.5rem); line-height: 1.06; letter-spacing: -.055em; max-width: 1000px; margin-bottom: 42px; }
h2 { font-size: clamp(2.2rem, 4vw, 3.6rem); line-height: 1.15; letter-spacing: -.045em; max-width: 820px; margin-bottom: 28px; }
.intro > p { max-width: 740px; font-size: 1rem; color: var(--muted); margin-bottom: 18px; }
strong { color: var(--text); font-weight: 600; }
blockquote { margin: 28px 0 0; border-left: 2px solid var(--accent); padding: 0 0 0 20px; color: var(--muted); font-size: .82rem; line-height: 1.7; max-width: 780px; }
#purpose { padding: 76px 0 64px; }
#purpose .intro { display: grid; grid-template-columns: 1.3fr 1fr; column-gap: 90px; align-items: start; }
#purpose .intro > p:first-child { font-size: 1.22rem; line-height: 1.65; color: var(--text); grid-column: 1; }
#purpose .intro > p:nth-child(2) { font-size: .94rem; grid-column: 2; grid-row: 1 / 3; padding-top: 4px; }
#purpose .intro > .actions { grid-column: 1; }
#purpose blockquote { grid-column: 1 / -1; max-width: none; margin-top: 32px; padding: 22px 0 0; border-left: 0; border-top: 1px solid var(--line); font-size: .78rem; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; margin-top: 40px; }
.card { min-width: 0; padding: 20px 0 0; border-top: 1px solid var(--line); }
.card h3 { font-size: 1.02rem; font-weight: 600; line-height: 1.4; margin-bottom: 14px; letter-spacing: -.02em; }
.card p { font-size: .88rem; line-height: 1.75; color: var(--muted); margin-top: 12px; overflow-wrap: anywhere; }
.card p:first-of-type { margin-top: 0; }
.after-cards { margin-top: 28px; }
.after-cards > p { font-size: .86rem; color: var(--muted); margin-top: 16px; }
.actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; margin: 26px 0 0; font-size: 0 !important; }
.actions a { font-size: .78rem; text-decoration: none; border-bottom: 1px solid var(--accent); padding: 8px 0; line-height: 1.5; }
#purpose .actions a:first-child { background: var(--accent); color: var(--paper); padding: 13px 20px; border: 1px solid var(--accent); }
#purpose .actions a:first-child:hover { background: var(--text); }
#hardware .copy { display: grid; grid-template-columns: 1fr 1.45fr; column-gap: 70px; }
#hardware h2 { grid-column: 1; grid-row: 1 / 4; max-width: 320px; }
#hardware .intro, #hardware .cards, #hardware .after-cards { grid-column: 2; }
#hardware .cards { grid-template-columns: 1fr; margin-top: 10px; gap: 18px; }
#hardware .card { display: grid; grid-template-columns: 160px 1fr; gap: 22px; padding-top: 18px; }
#hardware .card h3 { font-size: .86rem; }
#hardware .card p { font-size: .82rem; margin: 0; }
.enclosure { margin-top: 46px; background: #101a22; color: #eaf1f2; padding: 26px 32px; }
.enclosure button { color: #eaf1f2; border-color: #56635f; }
.enclosure button[aria-pressed="true"] { background: #d9e5db; color: #202c28; }
.example-label { color: var(--accent); font-size: .68rem; letter-spacing: .04em; }
.enclosure .example-label { color: #c5d4ca; margin-bottom: 18px; }
.choices { display: flex; gap: 8px; flex-wrap: wrap; }
#cadCanvas { display: block; width: 100%; height: auto; max-height: 510px; object-fit: contain; touch-action: pan-y; margin: 16px 0; }
.small { font-size: .73rem; color: var(--muted); margin-top: 18px; }
.enclosure .small { color: #b7c5c1; }
.example { margin-top: 34px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 18px 0; }
.example summary { font-size: .72rem; }
.example[open] .example-label { margin-bottom: 22px; }
.example-panel { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 50px; padding: 28px 0 12px; }
.example-panel h4 { font-size: .78rem; margin-bottom: 8px; font-weight: 600; }
.example-panel p { font-size: .85rem; color: var(--muted); }
#app .cards { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
#app .card { border: 0; padding: 0; }
#app .card h3 { font-size: .85rem; }
#app .card p { font-size: .78rem; }
.image-link { display: block; background: var(--soft); padding: 18px 10px; margin: 20px 0; }
.image-link img { display: block; width: 100%; max-width: 100%; height: 280px; object-fit: contain; }
#partners .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 60px; }
#partners .card { display: grid; grid-template-columns: 155px 1fr; gap: 20px; }
#partners .card h3 { font-size: .91rem; }
#partners .card p { margin: 0; font-size: .85rem; }
#first-step { background: var(--soft); padding: 64px 48px; margin: 64px 0 0; border: 0; }
#first-step .cards { display: block; margin-top: 38px; border-bottom: 1px solid #bdc7ba; }
#first-step .card { border-top: 1px solid #bdc7ba; padding: 0; }
.work-package > summary { display: flex; align-items: center; gap: 28px; padding: 23px 0; list-style: none; }
.work-package > summary::-webkit-details-marker { display: none; }
.work-package h3 { margin: 0; font-size: 1.14rem; font-weight: 500; }
.package-number { font-size: .69rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.disclosure-icon { margin-left: auto; font-size: 1.6rem; line-height: 1; font-weight: 300; }
.work-package[open] .disclosure-icon { transform: rotate(45deg); }
.package-content { padding: 0 38px 28px; max-width: 800px; }
#delivery .cards { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
#delivery .card h3 { font-size: .93rem; }
#delivery .card p { font-size: .83rem; }
#independence .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 70px; }
body[data-page="comparison"] .cards, body[data-page="sources"] .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 36px 64px; }
body[data-page="comparison"] h1, body[data-page="sources"] h1 { font-size: clamp(2.6rem, 5vw, 4.6rem); }
.closing { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; padding: 58px 0 38px; }
.footer-brand { font-size: 2rem; text-decoration: none; font-weight: 600; letter-spacing: -.07em; }
.closing > p { text-align: right; align-self: center; font-family: var(--serif); font-size: 1.2rem; }
.closing nav { display: flex; gap: 24px; font-size: .75rem; }
.closing small { text-align: right; font-size: .7rem; color: var(--muted); }
.presentation-bar { position: fixed; bottom: 0; left: 0; right: 0; display: flex; justify-content: center; gap: 40px; align-items: center; padding: 12px; background: var(--bg); border-top: 1px solid var(--line); z-index: 25; font-size: .8rem; }
body.slide-mode .section { display: none; padding-top: 38px; padding-bottom: 90px; min-height: calc(100vh - 140px); border: 0; margin-top: 0; }
body.slide-mode .section.active { display: block; }
body.slide-mode .closing { display: none; }
@media (max-width: 1000px) {
  .topbar { gap: 24px; }
  .primary-nav { gap: 22px; }
  #purpose .intro { column-gap: 40px; }
  #hardware .copy { column-gap: 40px; grid-template-columns: 1fr 1.4fr; }
  #hardware .card { grid-template-columns: 1fr; gap: 0; }
  #partners .card { display: block; }
  #app .cards, #delivery .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contents nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cards { gap: 25px; }
}
@media (max-width: 680px) {
  html { scroll-padding-top: 94px; }
  .topbar { min-height: 74px; padding: 16px 20px; flex-wrap: wrap; gap: 16px; }
  .wordmark { font-size: 1.85rem; }
  .primary-nav { order: 3; width: 100%; justify-content: space-between; gap: 12px; border-top: 1px solid var(--line); padding-top: 8px; }
  .primary-nav a { font-size: .75rem; padding: 3px 0; }
  .header-controls { margin-left: auto; gap: 12px; }
  .view-tools > summary { font-size: .68rem; }
  .layout { padding: 0 20px; }
  .contents nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .section { padding: 50px 0; scroll-margin-top: 138px; }
  .section-meta { margin-bottom: 22px; font-size: .62rem; }
  #purpose { padding: 42px 0 40px; }
  h1 { font-size: clamp(3rem, 12vw, 4.6rem); margin-bottom: 28px; }
  h2 { font-size: 2.4rem; }
  #purpose .intro, #hardware .copy { display: block; }
  #purpose .intro > p:first-child { font-size: 1.08rem; }
  #purpose .intro > p:nth-child(2) { font-size: .87rem; }
  #purpose blockquote { font-size: .74rem; }
  .intro > p { font-size: .91rem; }
  .cards, #partners .cards, #independence .cards, body[data-page="comparison"] .cards, body[data-page="sources"] .cards { grid-template-columns: 1fr; gap: 24px; margin-top: 28px; }
  #hardware .card { grid-template-columns: 1fr; }
  #hardware h2 { max-width: none; }
  .enclosure { margin-top: 30px; padding: 20px 14px; }
  .enclosure button { font-size: .69rem; padding: .4rem .5rem; }
  .enclosure .small { font-size: .68rem; }
  .example-panel { grid-template-columns: 1fr; }
  #app .cards { gap: 26px 16px; }
  #app .card h3 { font-size: .8rem; }
  #app .image-link { padding: 12px 6px; }
  .image-link img { height: 240px; }
  #first-step { margin-top: 32px; padding: 34px 22px; }
  .work-package > summary { gap: 14px; }
  .work-package h3 { font-size: .98rem; }
  .package-content { padding: 0 0 24px; }
  .package-content p { font-size: .83rem; }
  #delivery .cards { gap: 24px; }
  .closing { gap: 18px; }
  .closing > p { font-size: 1rem; }
  .closing nav { flex-wrap: wrap; gap: 10px; font-size: .7rem; }
}
@media (max-width: 380px) { #app .cards, #delivery .cards { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print {
  body { background: white; }
  .topbar, aside, .presentation-bar, .skip, .choices, .closing { display: none !important; }
  .layout { padding: 0; }
  .section, body.slide-mode .section { display: block !important; min-height: 0; padding: 20px 0; break-before: page; }
  .section:first-child { break-before: auto; }
  h1 { font-size: 36pt; } h2 { font-size: 26pt; }
  #purpose .intro { display: block; }
  #first-step { background: white; margin: 0; padding: 20px 0; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card { break-inside: avoid; }
  .disclosure-icon { display: none; }
  p { orphans: 3; widows: 3; }
}