:root {
  --ink: #202124;
  --muted: #5d626b;
  --paper: #f5f2ea;
  --white: #fff;
  --blue: #3867d6;
  --blue-dark: #234aa8;
  --cyan: #55cad5;
  --lime: #a7e33f;
  --amber: #f2b134;
  --purple: #7a2f7a;
  --red: #b42318;
  --green: #176b42;
  --border: #d4d0c7;
  --soft: #ece8df;
  --shadow: 0 20px 60px rgb(32 33 36 / 12%);
  --radius: 22px;
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 0; background: var(--paper); color: var(--ink); }
[hidden] { display: none !important; }
img, svg { max-width: 100%; height: auto; }
a { color: var(--blue-dark); text-underline-offset: .18em; }
a:hover { color: var(--purple); }
button, input, textarea, select { font: inherit; }
button, input, textarea, select { min-width: 0; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .5; }
:focus-visible { outline: 4px solid var(--lime); outline-offset: 3px; }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; overflow-wrap: anywhere; }
.shell { width: min(1180px, calc(100% - 2rem)); margin-inline: auto; }
.skip-link { position: fixed; inset-block-start: .5rem; inset-inline-start: .5rem; transform: translateY(-160%); background: var(--ink); color: #fff; padding: .7rem 1rem; z-index: 100; border-radius: 10px; }
.skip-link:focus { transform: translateY(0); }
.site-header { min-height: 78px; padding: .65rem max(1rem, calc((100vw - 1180px)/2)); display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1rem; position: sticky; top: 0; z-index: 30; background: rgb(245 242 234 / 96%); border-bottom: 1px solid var(--border); backdrop-filter: blur(14px); }
.app-brand { display: inline-flex; align-items: center; gap: .7rem; color: inherit; text-decoration: none; min-width: max-content; }
.app-brand img { width: 46px; height: 46px; }
.app-brand span { display: grid; line-height: 1.12; }
.app-brand strong { font-size: 1.18rem; letter-spacing: -.025em; }
.app-brand small { color: var(--muted); font-size: .7rem; margin-top: .22rem; }
.desktop-nav { display: flex; align-items: center; justify-content: flex-end; gap: .2rem; }
.desktop-nav > a { color: inherit; text-decoration: none; padding: .5rem .65rem; border-radius: 999px; font-size: .88rem; font-weight: 720; white-space: nowrap; }
.desktop-nav > a[aria-current="page"] { color: #fff; background: var(--ink); }
.language-picker { display: grid; gap: .12rem; margin-inline: .35rem; color: var(--muted); font-size: .66rem; }
.language-picker select { max-width: 8.8rem; border: 1px solid var(--border); border-radius: 9px; padding: .38rem .5rem; background: var(--white); color: var(--ink); }
.chapa-link { display: inline-flex !important; align-items: center; gap: .35rem; }
.chapa-link img { width: 27px; height: 27px; flex: 0 0 auto; }
.mobile-menu { display: none; }
.hero { padding-block: clamp(3.5rem, 8vw, 7rem); display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr); align-items: center; gap: clamp(2rem, 7vw, 6rem); }
.eyebrow { margin: 0 0 .7rem; text-transform: uppercase; letter-spacing: .13em; font-weight: 850; font-size: .75rem; color: var(--blue-dark); }
.hero h1, .editorial-hero h1 { margin: .2rem 0 1.25rem; max-width: 13ch; font-size: clamp(2.8rem, 7vw, 6.5rem); line-height: .94; letter-spacing: -.065em; }
.editorial-hero h1 { font-size: clamp(2.7rem, 6vw, 5.8rem); }
.lead { margin: 0; max-width: 67ch; color: var(--muted); font-size: clamp(1.1rem, 2vw, 1.4rem); }
.trust-row { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.5rem; }
.trust-row span { padding: .43rem .7rem; border: 1px solid var(--border); border-radius: 999px; background: rgb(255 255 255 / 70%); font-size: .82rem; font-weight: 780; }
.hero-graphic { min-height: 380px; position: relative; display: grid; place-items: center; }
.hero-graphic::before { content: ""; position: absolute; width: 90%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle at 32% 27%, #fff 0 12%, var(--cyan) 13% 38%, var(--lime) 39% 58%, var(--blue) 59% 100%); opacity: .2; }
.hero-graphic > img { position: relative; width: min(300px, 68vw); filter: drop-shadow(0 28px 32px rgb(32 33 36 / 18%)); }
.hero-graphic > div { position: absolute; inset: 0; }
.hero-graphic span { position: absolute; padding: .35rem .58rem; border: 2px solid var(--ink); border-radius: 999px; background: var(--white); box-shadow: 3px 3px 0 var(--ink); font: 800 .73rem ui-monospace, monospace; }
.hero-graphic span:nth-child(1) { inset-block-start: 9%; inset-inline-start: 0; transform: rotate(-5deg); }
.hero-graphic span:nth-child(2) { inset-block-start: 4%; inset-inline-end: 4%; transform: rotate(4deg); }
.hero-graphic span:nth-child(3) { inset-block-end: 12%; inset-inline-start: 5%; transform: rotate(3deg); }
.hero-graphic span:nth-child(4) { inset-block-end: 4%; inset-inline-end: 0; transform: rotate(-3deg); }
.hero-graphic span:nth-child(5) { inset-block-start: 48%; inset-inline-end: 0; }
.explain { padding-block: 1rem 5rem; }
.explain-main { display: grid; grid-template-columns: 70px minmax(0, 1fr); gap: .4rem 1rem; margin-bottom: 2rem; }
.explain-main h2, .section-head h2, .editorial-section > h2, .standards h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1; letter-spacing: -.045em; }
.explain-main > p:last-child { grid-column: 2; max-width: 70ch; color: var(--muted); font-size: 1.08rem; }
.section-number { margin: .35rem 0 0; color: var(--blue); font: 900 .8rem ui-monospace, monospace; letter-spacing: .08em; }
.explain-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1rem; }
.explain-grid article, .card-grid article, .steps-grid article, .privacy-grid article { padding: clamp(1.2rem, 3vw, 2rem); border: 1px solid var(--border); border-radius: var(--radius); background: var(--white); box-shadow: 0 7px 22px rgb(32 33 36 / 4%); }
.explain-grid article:nth-child(1) { border-top: 6px solid var(--blue); }
.explain-grid article:nth-child(2) { border-top: 6px solid var(--lime); }
.explain-grid article:nth-child(3) { border-top: 6px solid var(--cyan); }
.explain-grid article:nth-child(4) { border-top: 6px solid var(--amber); }
.explain-grid h3, .card-grid h3 { margin-top: 0; }
.explain-grid ul { padding-inline-start: 1.2rem; }
.situations { padding-block: 4.5rem; background: #e8efff; border-block: 1px solid #c4d1f2; }
.section-head { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 2rem; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; }
.card-grid article { min-height: 180px; }
.card-grid article:nth-child(1) { background: #fff; }
.card-grid article:nth-child(2) { background: #f1f9df; }
.card-grid article:nth-child(3) { background: #f4e8f4; }
.tool-section { padding-block: clamp(4rem, 9vw, 7rem); color: #fff; background: var(--ink); }
.tool-section .section-head p { color: var(--lime); }
.tool-section .section-head > div > p { margin: .6rem 0 0; color: #c9cbd0; max-width: 70ch; }
.work-card { min-width: 0; margin-top: 1.1rem; padding: clamp(1rem, 3vw, 2rem); color: var(--ink); background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); }
.work-card > h3 { margin: 0 0 .6rem; font-size: 1.45rem; }
.work-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.work-head h3 { margin: 0 0 .28rem; font-size: 1.45rem; line-height: 1.15; }
.work-head p { margin: 0; color: var(--muted); }
.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: .65rem; }
button, .button-link { min-height: 43px; padding: .66rem .9rem; border: 2px solid var(--ink); border-radius: 999px; color: var(--ink); background: var(--lime); box-shadow: 3px 3px 0 var(--ink); font-weight: 820; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }
button:hover:not(:disabled), .button-link:hover { color: var(--ink); transform: translate(-1px,-1px); box-shadow: 5px 5px 0 var(--ink); }
.secondary-button { background: #e7efff; }
.quiet-button { background: var(--white); box-shadow: none; border-width: 1px; }
.source-actions { margin-top: 1rem; }
.field { display: grid; gap: .4rem; min-width: 0; font-weight: 760; }
.field.wide { grid-column: 1 / -1; }
.field small { color: var(--muted); font-weight: 450; font-size: .8rem; }
.field input, .field textarea, .field select { width: 100%; padding: .7rem .75rem; color: var(--ink); background: var(--white); border: 1px solid #aeb0b4; border-radius: 11px; }
.field textarea { resize: vertical; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .86rem; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1rem; }
.status-region { min-height: 1.7em; margin: 0 0 .8rem; font-weight: 800; }
.status-region[data-kind="success"] { color: #b7f36b; }
.status-region[data-kind="warning"] { color: #ffd464; }
.status-region[data-kind="error"] { color: #ff9d94; }
.empty-state { padding: 1rem; color: var(--muted); background: var(--paper); border: 1px dashed #9da0a5; border-radius: 12px; }
.source-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: .7rem; margin: 1rem 0; }
.source-grid > div, .artifact-summary > div { display: grid; gap: .25rem; padding: .8rem; border: 1px solid var(--border); border-radius: 12px; background: #f8f7f3; }
.source-grid span, .artifact-summary span { color: var(--muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; }
.warning-list { color: #754d00; background: #fff4cf; border: 1px solid #e2c46e; border-radius: 12px; padding: .9rem 1rem .9rem 2rem; }
.muted { color: var(--muted); }
.operation-list { display: grid; gap: 1rem; }
.operation-card { border: 1px solid var(--border); border-radius: 16px; overflow: hidden; }
.operation-card.selected { border-color: var(--blue); box-shadow: 0 0 0 2px rgb(56 103 214 / 14%); }
.operation-card > header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .9rem 1rem; background: #f7f6f1; border-bottom: 1px solid var(--border); }
.operation-select { display: flex; align-items: center; gap: .55rem; min-width: 0; }
.operation-select code { font-size: .82rem; }
.method { display: inline-flex; min-width: 58px; justify-content: center; padding: .24rem .43rem; border-radius: 999px; color: #fff; font: 850 .7rem ui-monospace, monospace; }
.method-get, .method-head, .method-options { background: var(--green); }
.method-post { background: var(--blue); }
.method-put, .method-patch { background: #8b5d00; }
.method-delete { background: var(--red); }
.method-trace { background: var(--purple); }
.response-badge { color: var(--muted); font-size: .74rem; text-align: end; }
.operation-editor { display: grid; grid-template-columns: minmax(210px,.7fr) minmax(0,1.3fr); gap: 1rem; padding: 1rem; }
.annotation-row { display: flex; flex-wrap: wrap; gap: .5rem; padding: 0 1rem 1rem; }
.check-chip { display: inline-flex; align-items: center; gap: .4rem; padding: .42rem .65rem; border: 1px solid var(--border); border-radius: 999px; background: #f8f7f3; font-size: .8rem; font-weight: 730; }
.check-chip:has(input:checked) { border-color: var(--blue); background: #e8efff; }
.check-chip:has(input:disabled) { opacity: .72; }
.operation-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; padding: 0 1rem; }
.operation-detail-grid h4 { margin: 0 0 .4rem; }
.parameter-list { margin: 0; padding: 0; list-style: none; display: grid; gap: .32rem; }
.parameter-list li { display: flex; justify-content: space-between; gap: .6rem; border-bottom: 1px dotted var(--border); font-size: .8rem; }
.operation-warnings { margin: 1rem; padding: .7rem .8rem; border-radius: 10px; background: #fff4cf; }
.operation-warnings summary { cursor: pointer; font-weight: 780; }
.operation-ok { margin: 1rem; color: var(--green); font-weight: 720; }
.review-check { display: flex; align-items: flex-start; gap: .55rem; margin: 1rem; padding: .8rem; border: 2px solid var(--ink); border-radius: 12px; font-weight: 800; }
.compatibility-box { margin: 1rem 0; padding: 1rem; background: #e8efff; border: 1px solid #b8c7ed; border-radius: 14px; }
.compatibility-box h4 { margin: 0 0 .7rem; }
.compatibility-box dl { margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: .6rem; }
.compatibility-box dl > div { display: grid; gap: .18rem; }
.compatibility-box dt { color: var(--muted); font-size: .7rem; text-transform: uppercase; }
.compatibility-box dd { margin: 0; font-weight: 800; overflow-wrap: anywhere; }
.validation-region { min-height: 1.5em; margin-block: .75rem; }
.validation-error { color: var(--red); }
.validation-ok { color: var(--green); font-weight: 760; }
.artifact-summary { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: .7rem; }
.file-tree { columns: 2; padding-inline-start: 1.2rem; }
.file-tree li { break-inside: avoid; margin-bottom: .3rem; }
.table-wrap { width: 100%; overflow-x: auto; border-radius: 12px; }
table { width: 100%; min-width: 720px; border-collapse: collapse; font-size: .86rem; }
th, td { padding: .75rem .65rem; text-align: start; vertical-align: top; border-bottom: 1px solid var(--border); }
th { background: var(--paper); font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; }
.editorial-hero { padding-block: clamp(3.2rem, 8vw, 6.5rem) 3rem; }
.editorial-section { padding-block: 1rem 5rem; }
.steps-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1rem; }
.steps-grid article { border-inline-start: 7px solid var(--blue); }
.steps-grid h2 { margin-top: 0; }
.standards { padding-block: 4.5rem; background: #e8efff; }
.standards > .shell > p { max-width: 68ch; color: var(--muted); }
.note { margin-top: 2rem; padding: 1.4rem; background: #e8efff; border: 1px solid #b8c7ed; border-radius: var(--radius); }
.note h2 { margin-top: 0; }
.danger-note { background: #fff0c2; border-color: #dfc46a; }
.case-list { display: grid; gap: 1rem; }
.case-list article { display: grid; grid-template-columns: 60px minmax(0,1fr); gap: 1rem; padding: 1.3rem; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); }
.case-list > article > span { color: var(--blue); font: 900 .85rem ui-monospace, monospace; }
.case-list h2 { margin: .1rem 0 .5rem; }
.case-role { margin: 0; color: var(--muted); font-size: .76rem; text-transform: uppercase; letter-spacing: .07em; font-weight: 800; }
.privacy-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; padding-block: 0 5rem; }
.privacy-grid h2 { margin-top: 0; }
.privacy-wide { grid-column: 1 / -1; }
.not-found { min-height: 78vh; padding: 4rem 1rem; display: grid; place-items: center; align-content: center; text-align: center; }
.not-found h1 { margin: .4rem 0; font-size: clamp(2.4rem, 6vw, 5rem); }
.not-found > p { color: var(--muted); max-width: 52ch; }
.chapa-principles { min-height: 72px; padding: .85rem max(1rem, calc((100vw - 1180px)/2)); display: grid; grid-template-columns: 1fr auto; align-items: center; gap: .8rem 1.5rem; color: #fff; background: #111; border-top: 1px solid #333; }
.chapa-principles p { margin: 0; font-weight: 830; }
.chapa-principles nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .8rem; }
.chapa-principles a { color: #fff; }
[dir="rtl"] .hero h1, [dir="rtl"] .editorial-hero h1 { letter-spacing: 0; }
[dir="rtl"] .operation-card > header, [dir="rtl"] .work-head { text-align: start; }
@media (max-width: 1040px) {
  .desktop-nav { display: none; }
  .site-header { grid-template-columns: auto 1fr; }
  .mobile-menu { display: block; justify-self: end; position: relative; }
  .mobile-menu summary { list-style: none; cursor: pointer; padding: .55rem .75rem; border: 1px solid var(--border); border-radius: 10px; background: var(--white); font-weight: 800; }
  .mobile-menu summary::-webkit-details-marker { display: none; }
  .mobile-menu > div { position: absolute; inset-inline-end: 0; top: calc(100% + .45rem); min-width: min(300px, calc(100vw - 1rem)); padding: .55rem; display: grid; gap: .15rem; background: var(--white); border: 1px solid var(--border); border-radius: 13px; box-shadow: var(--shadow); }
  .mobile-menu a { padding: .55rem; color: var(--ink); text-decoration: none; border-radius: 8px; }
  .mobile-menu a[aria-current="page"] { background: var(--ink); color: #fff; }
  .mobile-menu .language-picker { margin: .4rem 0; }
  .mobile-menu select { max-width: none; }
}
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; }
  .hero-graphic { min-height: 290px; }
  .explain-grid, .card-grid, .steps-grid, .privacy-grid { grid-template-columns: 1fr; }
  .privacy-wide { grid-column: auto; }
  .source-grid, .artifact-summary { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .operation-editor, .operation-detail-grid { grid-template-columns: 1fr; }
  .compatibility-box dl { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 560px) {
  .shell { width: min(100% - 1rem, 1180px); }
  .site-header { position: static; min-height: 68px; padding-inline: .5rem; gap: .5rem; }
  .app-brand img { width: 40px; height: 40px; }
  .app-brand small { display: none; }
  .hero { padding-block: 2.8rem 3.5rem; }
  .hero h1 { font-size: clamp(2.55rem, 15vw, 4.1rem); }
  .hero-graphic { min-height: 250px; }
  .hero-graphic > img { width: 210px; }
  .explain-main { grid-template-columns: 42px minmax(0,1fr); }
  .work-head { flex-direction: column; }
  .work-head .button-row { width: 100%; }
  .button-row button, .button-row .button-link { flex: 1 1 auto; }
  .form-grid, .source-grid, .artifact-summary, .compatibility-box dl { grid-template-columns: 1fr; }
  .operation-card > header { align-items: flex-start; flex-direction: column; }
  .response-badge { text-align: start; }
  .file-tree { columns: 1; }
  .chapa-principles { grid-template-columns: 1fr; text-align: center; }
  .chapa-principles nav { justify-content: center; }
}
@media (max-width: 360px) {
  .app-brand strong { font-size: 1rem; }
  button, .button-link { width: 100%; }
  .button-row { width: 100%; }
  .method { min-width: 52px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; transition-duration: .001ms !important; }
  button:hover, .button-link:hover { transform: none; }
}