/* OpenKeel static site — visual language of the reference site (inherent.fr): lime to orange gradient blocks with
   30px radii, Suez One titles, Space Grotesk text, Poppins navigation, lime pill buttons, coal footer. */
:root {
  --orange: #ff6100;
  --orange-1: #ff4a25;
  --lime: #ccfe00;
  --coal: #2c2a2a;
  --anthracite: #32323f;
  --carbon: #65605d;
  --steel: #7e7e90;
  --silver: #9d9dac;
  --gris-01: #f9f8fc;
  --gris-02: #e4e4ed;
  --gris-03: #cecede;
  --violet: #a57dff;
  --light-violet: #f0e9ff;
  --blue: #32ade9;
  --white: #fff;
  --gradient: linear-gradient(180deg, var(--lime) 0%, var(--orange) 30%);
  --gradient-soft: linear-gradient(180deg, var(--lime) 0%, var(--orange) 55%);
  --shadow: 0 4px 14px rgba(50, 50, 63, .15);
  --font-title: "Suez One", Georgia, "Times New Roman", serif;
  --font-text: "Space Grotesk", Arial, Helvetica, sans-serif;
  --font-nav: Poppins, Arial, Helvetica, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --max: 1400px;
  --gutter: clamp(16px, 3vw, 40px);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; background: var(--white); color: var(--anthracite); font: 400 18px/1.55 var(--font-text); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-title); font-weight: 400; color: var(--coal); line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 3.3vw, 3rem); }
h2 { font-size: clamp(1.6rem, 2.4vw, 2.25rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; }
code { font-family: var(--mono); font-size: .86em; background: var(--gris-01); border: 1px solid var(--gris-02); border-radius: 6px; padding: .05em .35em; }
.ic { width: 1.1em; height: 1.1em; flex: none; vertical-align: -0.18em; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.mono { font-family: var(--mono); font-size: .8rem; }

/* ---------- header ---------- */
.announce { background: var(--orange); color: var(--white); text-align: center; font: 600 15px/1.3 var(--font-nav); padding: 10px var(--gutter); }
.announce p { margin: 0; }
.announce a { color: var(--white); font-weight: 400; margin-left: .6em; text-underline-offset: 3px; }
.site-header { position: sticky; top: 0; z-index: 50; background: var(--white); transition: box-shadow .2s; }
.site-header.scrolled { box-shadow: 0 2px 18px rgba(50, 50, 63, .12); }
.utility { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); overflow: hidden; max-height: 48px; transition: max-height .25s, opacity .2s; }
.site-header.scrolled .utility { max-height: 0; opacity: 0; }
.utility ul { list-style: none; display: flex; justify-content: flex-end; gap: 34px; margin: 0; padding: 14px 0 6px; font: 400 14px var(--font-text); }
.utility a { text-decoration: none; color: var(--coal); }
.utility a:hover { color: var(--orange); }
.mainbar { max-width: var(--max); margin: 0 auto; padding: 10px var(--gutter) 14px; display: flex; align-items: center; gap: 28px; }
.logo { display: inline-flex; align-items: center; gap: 8px; text-decoration: none; font: 400 2.15rem/1 var(--font-title); color: var(--orange); letter-spacing: -.5px; }
.logo b { font-weight: 400; color: var(--coal); }
.logo-mark { width: 40px; height: 40px; color: var(--coal); flex: none; }
.logo-light b { color: var(--lime); }
.logo-light .logo-mark { color: #fff; }
.nav-primary { flex: 1; }
.lv1-list { list-style: none; display: flex; gap: 6px; margin: 0; padding: 0; justify-content: center; }
.lv1-btn { background: none; border: 0; cursor: pointer; font: 600 14px var(--font-nav); color: var(--coal); padding: 12px 12px; display: inline-flex; align-items: center; gap: 6px; border-radius: 30px; }
.lv1-btn .chev { transition: transform .2s; }
.lv1.is-open > .lv1-btn, .lv1-btn:hover, .lv1.is-current > .lv1-btn { color: var(--orange); }
.lv1.is-open > .lv1-btn .chev { transform: rotate(180deg); }
.sub-menu { position: absolute; left: var(--gutter); right: var(--gutter); max-width: calc(var(--max) - 2 * var(--gutter)); margin: 0 auto; top: 100%; background: var(--white); border-radius: 10px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity .18s, transform .18s, visibility .18s; }
.lv1.is-open > .sub-menu { opacity: 1; visibility: visible; transform: none; }
.sub-inner { display: grid; grid-template-columns: 1.15fr 1fr .95fr; min-height: 300px; }
.col-main { padding: 32px 22px 30px; border-right: 1px solid var(--gris-02); margin: 28px 0; padding-top: 4px; }
.sub-title { font: 400 1.15rem var(--font-title); color: var(--coal); margin: 0 0 22px; }
.lv2 { list-style: none; margin: 0; padding: 0; }
.lv2 a { display: flex; align-items: center; gap: 8px; text-decoration: none; font: 500 14px var(--font-nav); color: var(--anthracite); padding: 8px 0; }
.lv2 li.is-active > a, .lv2 a:hover { color: var(--orange); }
.col-kids { padding: 34px 28px; display: flex; align-items: center; }
.lv3 { display: none; }
.lv3.is-active { display: block; }
.lv3 ul { list-style: none; margin: 0 0 18px; padding: 0; }
.lv3 a { text-decoration: none; font: 400 13px/1.4 var(--font-nav); color: var(--coal); display: block; padding: 5px 0; }
.lv3 a:hover { color: var(--orange); }
.discover, .link-arrow { display: inline-flex; align-items: center; gap: 8px; color: var(--orange) !important; text-decoration: none; font: 500 14px var(--font-nav); }
.discover:hover .ic, .link-arrow:hover .ic { transform: translateX(3px); }
.discover .ic, .link-arrow .ic { transition: transform .15s; }
.section-orange .link-arrow, .hero .link-arrow { color: var(--coal) !important; text-decoration: underline; text-underline-offset: 4px; }
.section-orange .card .link-arrow { color: var(--orange) !important; text-decoration: none; }
.lv1-btn:focus:not(:focus-visible), .tab:focus:not(:focus-visible) { outline: none; }
.col-aside { background: var(--gris-01); border-radius: 0 10px 10px 0; padding: 32px 30px; }
.col-aside ul { list-style: none; margin: 0; padding: 0; }
.col-aside a { display: flex; align-items: center; gap: 14px; text-decoration: none; font: 500 14px var(--font-nav); color: var(--coal); padding: 9px 0; }
.col-aside a .ic { color: var(--orange); width: 20px; height: 20px; }
.col-aside a:hover { color: var(--orange); }
.mobile-utility { display: none; }
.btn { display: inline-flex; align-items: center; gap: 10px; font: 600 14px var(--font-nav); text-decoration: none; padding: 13px 26px; border-radius: 30px; border: 0; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(44, 42, 42, .18); }
.btn-lime { background: var(--lime); color: var(--coal); }
.btn-dark { background: var(--coal); color: var(--white); }
.cta { white-space: nowrap; }
.burger { display: none; background: none; border: 0; padding: 8px; cursor: pointer; color: var(--coal); margin-left: auto; }
.burger .ic { width: 28px; height: 28px; }
.burger .close { display: none; }

/* ---------- blocks ---------- */
.section-orange { background: var(--gradient); border-radius: 30px; }
.block { padding: clamp(48px, 6vw, 90px) 0; }
.block.section-orange { margin: 24px var(--gutter); }
.block.section-orange > .wrap { padding: 0 clamp(16px, 2.5vw, 30px); }
.sec-head { max-width: 860px; margin-bottom: 36px; }
.sec-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.intro { font-size: 1.05rem; color: var(--anthracite); }
.note { font-size: .9rem; color: var(--carbon); margin-top: 22px; }
.actions { display: flex; flex-wrap: wrap; gap: 14px 22px; align-items: center; margin-top: 26px; }
.actions.center { justify-content: center; }

.hero { padding: 6px var(--gutter) 24px; }
.hero-card { max-width: calc(var(--max) - 2 * var(--gutter)); margin: 0 auto; background: var(--gradient); border-radius: 30px; padding: clamp(40px, 6vw, 90px) clamp(20px, 4vw, 50px) clamp(36px, 4vw, 50px); display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(24px, 4vw, 60px); align-items: center; }
.hero h1 { font-size: clamp(2.1rem, 3.6vw, 3.25rem); }
.hero-lead { font-size: 1.12rem; color: var(--coal); }
.hero-lead strong { font-weight: 600; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 6px; padding: 0; }
.chips li { background: var(--white); border-radius: 30px; padding: 6px 14px; font: 600 13px var(--font-nav); color: var(--coal); }
.hero-visual { background: var(--coal); border-radius: 20px; padding: 18px; }
.hero-visual .illu { display: block; width: 100%; border-radius: 14px; }
.tagline { color: var(--white); font: 400 1.05rem/1.4 var(--font-title); margin: 16px 6px 4px; }

.twocol > .wrap { display: grid; grid-template-columns: 1fr 1.1fr; gap: clamp(28px, 5vw, 90px); align-items: center; }
.twocol.reverse .tc-visual { order: 2; }
.tc-visual .illu { width: 100%; max-width: 520px; display: block; margin: 0 auto; border-radius: 20px; }
.checks { list-style: none; margin: 22px 0 0; padding: 0; }
.checks li { display: flex; gap: 14px; align-items: center; padding: 7px 0; font-size: 1rem; }
.checks .ok { color: var(--coal); background: var(--lime); border-radius: 50%; padding: 4px; width: 28px; height: 28px; }

.grid { display: grid; gap: 22px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-5 { grid-template-columns: repeat(5, 1fr); }
.card { background: var(--white); border-radius: 15px; padding: 28px 26px; display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: var(--anthracite); border: 1px solid var(--gris-02); position: relative; }
.section-orange .card { border-color: transparent; }
.card.linked { transition: transform .15s, box-shadow .15s; }
.card.linked:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card h3 { margin: 0; font-size: 1.35rem; }
.card p, .card li { font-size: .95rem; margin: 0; }
.card ul { margin: 4px 0 0; padding-left: 1.1em; }
.card li { margin: 4px 0; }
.card li::marker { color: var(--orange); }
.card .link-arrow { margin-top: auto; padding-top: 8px; }
.card-top { display: flex; align-items: center; gap: 14px; }
.card-ic { display: inline-grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: var(--gris-01); color: var(--orange); flex: none; }
.card-ic .ic { width: 22px; height: 22px; }
.tag { align-self: flex-start; background: var(--lime); color: var(--coal); border-radius: 8px; padding: 4px 10px; font: 500 12px var(--font-nav); }
.card.dark { background: var(--coal); color: var(--gris-02); border-color: var(--coal); }
.card.dark h3 { color: var(--white); }
.card.dark .card-ic { background: rgba(255, 255, 255, .08); color: var(--lime); }
.card.dark li::marker { color: var(--lime); }
.card.compact { padding: 22px 18px; text-align: center; align-items: center; }
.card.compact .card-top { flex-direction: column; }
.card.compact h3 { font-size: 1.1rem; }
.card pre.code { margin-top: 10px; }

.flow { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 22px; counter-reset: f; }
.flow-step { background: var(--gris-01); border-radius: 15px; padding: 26px 24px; position: relative; }
.flow-step:not(:last-child)::after { content: ""; position: absolute; right: -18px; top: 50%; width: 14px; height: 14px; border-top: 3px solid var(--orange); border-right: 3px solid var(--orange); transform: translateY(-50%) rotate(45deg); }
.flow-n { position: absolute; top: 18px; right: 22px; font: 400 1.6rem var(--font-title); color: var(--gris-03); }
.flow-step h3 { margin: 16px 0 6px; font-size: 1.2rem; }
.flow-step p { font-size: .95rem; margin: 0; }
.flow-step .card-ic { background: var(--white); }

.stats { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 22px; }
.stats li { border-left: 4px solid var(--lime); padding: 6px 0 6px 20px; display: flex; flex-direction: column; }
.stat-v { font: 400 clamp(2.2rem, 3.6vw, 3.2rem)/1.1 var(--font-title); color: var(--orange); }
.stat-l { font-size: .98rem; color: var(--anthracite); }

.table-wrap { overflow-x: auto; border-radius: 15px; border: 1px solid var(--gris-02); background: var(--white); }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { text-align: left; vertical-align: top; padding: 12px 16px; border-bottom: 1px solid var(--gris-02); }
thead th { background: var(--coal); color: var(--white); font: 600 14px var(--font-nav); }
tbody tr:nth-child(even) td { background: var(--gris-01); }
tbody tr:last-child td { border-bottom: 0; }
td.hl, th.hl { background: #f6ffd6 !important; }
thead th.hl { background: var(--orange) !important; color: var(--white); }
.table-wrap.num td:not(:first-child), .table-wrap.num th:not(:first-child) { text-align: right; font-variant-numeric: tabular-nums; }
.with-side { display: grid; grid-template-columns: 2fr 1fr; gap: 26px; align-items: start; }
.side-fig { margin: 0; background: var(--gris-01); border-radius: 15px; padding: 14px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }

.timeline { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(7, 1fr); gap: 14px; position: relative; }
.timeline::before { content: ""; position: absolute; left: 0; right: 0; top: 52px; height: 3px; background: var(--gradient-soft); background: linear-gradient(90deg, var(--lime), var(--orange)); border-radius: 3px; }
.timeline li { position: relative; }
.tl-date { display: block; font: 400 1.45rem var(--font-title); color: var(--coal); height: 40px; }
.tl-dot { display: block; width: 18px; height: 18px; border-radius: 50%; background: var(--white); border: 4px solid var(--orange); margin: 3px 0 14px; position: relative; z-index: 1; }
.timeline p { font-size: .92rem; }

.layers { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.layers li { display: grid; grid-template-columns: 240px 1fr; gap: 24px; align-items: center; background: var(--gris-01); border-radius: 15px; padding: 16px 22px; margin-left: calc(var(--i) * 18px); }
.layers li:nth-child(odd) { background: #fff4ec; }
.layer-name { font: 400 1.15rem var(--font-title); color: var(--coal); display: flex; align-items: center; gap: 10px; }
.layer-name::before { content: ""; width: 12px; height: 12px; border-radius: 3px; background: var(--orange); flex: none; }
.layers p { margin: 0; font-size: .95rem; }

.banner { padding: clamp(36px, 5vw, 64px); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 26px; }
.banner > div { max-width: 820px; }
.banner p { font-size: 1.08rem; color: var(--coal); margin: 0; }
.banner .actions { margin: 0; }
.banner-sec { padding: 24px 0; }

.code-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: clamp(24px, 4vw, 60px); align-items: center; }
pre.code, .prose pre { background: var(--coal); color: #f4f4f8; border-radius: 15px; padding: 22px 24px; overflow-x: auto; font: 14px/1.6 var(--mono); margin: 0; }
pre.code code, .prose pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }

.vchips { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.vchips li { background: var(--gris-01); border-radius: 12px; padding: 14px 18px; display: flex; flex-direction: column; }
.vchips b { font: 600 14px var(--font-nav); color: var(--coal); }
.vchips span { font: 13px var(--mono); color: var(--orange); }
.with-aside { display: grid; grid-template-columns: 2fr 1fr; gap: 26px; align-items: start; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.steps li { background: var(--gris-01); border-radius: 15px; padding: 24px 22px; position: relative; }
.step-n { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--lime); font: 400 1.2rem var(--font-title); color: var(--coal); margin-bottom: 12px; }
.steps li:nth-child(n+5) .step-n { background: var(--orange); color: var(--white); }
.steps h3 { font-size: 1.15rem; margin-bottom: 6px; }
.steps p { font-size: .93rem; margin: 0; }

.diagram { margin: 0; }
.diagram .zoom { display: block; position: relative; background: var(--white); border: 1px solid var(--gris-02); border-radius: 15px; padding: 14px; overflow: auto; max-height: 82vh; }
.diagram img { display: block; width: 100%; min-width: 760px; }
.zoom-hint { position: absolute; top: 12px; right: 12px; background: var(--coal); color: var(--white); border-radius: 20px; padding: 6px 12px; font: 500 12px var(--font-nav); display: inline-flex; gap: 6px; align-items: center; opacity: 0; transition: opacity .15s; }
.zoom:hover .zoom-hint, .zoom:focus .zoom-hint { opacity: 1; }
.diagram figcaption { font-size: .9rem; color: var(--carbon); margin-top: 12px; }
.diag-split { display: grid; grid-template-columns: 1fr 1.6fr; gap: 40px; align-items: start; }
.diag-split .diagram img { min-width: 0; }
.bullets { margin: 0; padding-left: 1.1em; }
.bullets li { margin: 0 0 10px; }
.bullets li::marker { color: var(--orange); }
.md-more { margin-top: 22px; background: var(--gris-01); border-radius: 15px; padding: 4px 22px; }
.md-more > summary { cursor: pointer; font: 600 15px var(--font-nav); padding: 14px 0; color: var(--coal); }
.md-more[open] > summary { color: var(--orange); }
.md-more .table-wrap { margin-bottom: 18px; }

.faq { max-width: 960px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--gris-02); }
.faq-item summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 20px; padding: 22px 0; font: 400 1.2rem var(--font-title); color: var(--coal); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev { transition: transform .2s; color: var(--orange); width: 24px; height: 24px; }
.faq-item[open] summary .chev { transform: rotate(180deg); }
.faq-item div { padding: 0 0 22px; }

.tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.tab { border: 1px solid var(--gris-03); background: var(--white); border-radius: 30px; padding: 9px 18px; font: 500 14px var(--font-nav); color: var(--coal); cursor: pointer; }
.tab.is-active, .tab:hover { background: var(--coal); color: var(--white); border-color: var(--coal); }
.filterable > [hidden] { display: none; }
.filterable > div { display: flex; }
.filterable > div > .card { flex: 1; }

.comp-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: auto; padding-top: 10px; }
.badge { display: inline-block; border-radius: 8px; padding: 3px 10px; font: 600 12px var(--font-nav); background: var(--gris-02); color: var(--coal); }
.badge.b-go { background: var(--lime); }
.badge.b-chartu { background: var(--light-violet); color: #5a3bb3; }
.badge.b-clionl { background: #ffe3d1; color: #a33d00; }
.badge.b-specif { background: #dff2fb; color: #12688f; }
.backend { font: 500 12px var(--font-nav); color: var(--carbon); }
.comp-group { margin-bottom: 56px; scroll-margin-top: 120px; }
.comp-group h2 { display: flex; align-items: center; gap: 14px; }
.comp-group h2 .ic { color: var(--orange); width: 30px; height: 30px; }

.page-head { margin: 6px var(--gutter) 0; padding: clamp(40px, 5vw, 72px) 0 clamp(34px, 4vw, 56px); }
.page-head h1 { max-width: 980px; }
.page-head .lead { font-size: 1.15rem; max-width: 900px; color: var(--coal); margin: 0; }
.kicker { font: 600 13px var(--font-nav); text-transform: uppercase; letter-spacing: .08em; color: var(--coal); margin-bottom: 10px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 26px; padding: 0; font: 400 13px var(--font-nav); }
.crumbs li:not(:last-child)::after { content: "›"; margin-left: 8px; }
.crumbs a { color: var(--coal); }
.head-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.pill { display: inline-flex; align-items: center; gap: 6px; background: var(--white); border-radius: 30px; padding: 4px 14px; font: 500 13px var(--font-nav); }

.readme-grid { display: grid; grid-template-columns: 1.8fr 1fr; gap: 40px; align-items: start; }
.facts dl { display: grid; grid-template-columns: 1fr; gap: 2px; margin: 8px 0 0; }
.facts dt { font: 500 12px var(--font-nav); color: var(--silver); text-transform: uppercase; letter-spacing: .05em; margin-top: 10px; }
.facts dd { margin: 0; color: var(--white); font: 400 1.15rem var(--font-title); }
.pager { display: flex; justify-content: space-between; gap: 20px; padding-top: 10px; padding-bottom: 60px; }
.pager a { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 600 14px var(--font-nav); color: var(--orange); }
.flip { transform: rotate(180deg); }

.prose { max-width: 980px; }
.prose h1, .prose h2 { margin-top: 1.6em; }
.prose h3, .prose h4 { margin-top: 1.4em; }
.prose h4 { font-size: 1.1rem; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: 4px 0; }
.prose li::marker { color: var(--orange); }
.prose blockquote { margin: 1em 0; padding: 14px 20px; background: var(--gris-01); border-left: 4px solid var(--lime); border-radius: 0 12px 12px 0; }
.prose blockquote p:last-child { margin: 0; }
.prose .table-wrap { margin: 1em 0 1.4em; }
.prose a { color: #c24a00; }
.prose pre { margin: 1em 0 1.4em; font-size: 13px; }
.prose hr { border: 0; border-top: 1px solid var(--gris-02); margin: 2em 0; }
.prose.spec, .doc-grid .prose { font-size: 16px; }
.mermaid-wrap { background: var(--white); border: 1px solid var(--gris-02); border-radius: 15px; padding: 16px; overflow-x: auto; margin: 1em 0 1.4em; }
pre.mermaid { background: none; color: var(--coal); margin: 0; font-size: 13px; }
.doc-grid { display: grid; grid-template-columns: 270px 1fr; gap: 44px; align-items: start; }
.toc { position: sticky; top: 110px; max-height: calc(100vh - 130px); overflow: auto; background: var(--gris-01); border-radius: 15px; padding: 22px; font: 400 13px/1.4 var(--font-nav); }
.toc ul { list-style: none; margin: 0 0 20px; padding: 0; }
.toc li a { display: block; padding: 5px 0; text-decoration: none; color: var(--anthracite); }
.toc li a:hover, .toc li.is-current a { color: var(--orange); }
.toc li.is-current a { font-weight: 600; }
.toc .sub-title { font-size: 1rem; margin-bottom: 10px; }

.spec-card h3 { font-size: 1.25rem; }
.spec-branch { display: flex; align-items: center; gap: 6px; font: 500 12px var(--font-nav) !important; color: var(--carbon); }
.gal-card { padding: 16px 16px 22px; }
.thumb { background: var(--gris-01); border-radius: 10px; height: 200px; display: grid; place-items: center; overflow: hidden; padding: 10px; }
.thumb img { max-height: 180px; object-fit: contain; }
.outline { columns: 2; column-gap: 50px; padding-left: 1.4em; font-size: .97rem; margin: 0 0 40px; }
.outline li { margin: 4px 0; break-inside: avoid; }
.outline li::marker { color: var(--orange); font-family: var(--font-title); }
.sheets .sheet { display: block; border-radius: 12px; overflow: hidden; border: 1px solid var(--gris-02); }
.sheets img { display: block; }

/* ---------- footer ---------- */
.site-footer { background: var(--coal); color: var(--gris-03); border-radius: 15px 15px 0 0; margin-top: 60px; padding: 64px 0 30px; font-size: 15px; }
.f-top { display: grid; grid-template-columns: 1.6fr repeat(5, 1fr); gap: 30px; }
.f-about p { margin: 18px 0 0; }
.f-tag { font-family: var(--font-title); color: var(--lime); }
.f-title { font: 400 1.05rem var(--font-title); color: var(--white); margin: 0 0 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li a { display: block; padding: 4px 0; text-decoration: none; color: var(--gris-03); font-size: 14px; }
.site-footer li a:hover { color: var(--lime); }
.f-bottom { border-top: 1px solid rgba(255, 255, 255, .12); margin-top: 44px; padding-top: 20px; font-size: 13px; color: var(--silver); display: flex; flex-wrap: wrap; gap: 10px 40px; justify-content: space-between; }
.f-bottom p { margin: 0; max-width: 760px; }
.site-footer code { background: rgba(255, 255, 255, .08); border-color: transparent; color: var(--white); }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  .grid.cols-5 { grid-template-columns: repeat(3, 1fr); }
  .grid.cols-4, .steps { grid-template-columns: repeat(2, 1fr); }
  .f-top { grid-template-columns: repeat(3, 1fr); }
  .f-about { grid-column: 1 / -1; }
  .timeline { grid-template-columns: repeat(4, 1fr); row-gap: 30px; }
  .timeline::before { display: none; }
}
@media (max-width: 1080px) {
  .utility { display: none; }
  .burger { display: block; }
  .cta { display: none; }
  .nav-primary { display: none; position: fixed; inset: 72px 0 0 0; background: var(--white); overflow-y: auto; padding: 10px var(--gutter) 40px; }
  body.nav-open { overflow: hidden; }
  body.nav-open .nav-primary { display: block; }
  body.nav-open .burger .ic:first-child { display: none; }
  body.nav-open .burger .close { display: block; }
  .lv1-list { flex-direction: column; gap: 0; }
  .lv1 { border-bottom: 1px solid var(--gris-02); }
  .lv1-btn { width: 100%; justify-content: space-between; padding: 18px 0; font-size: 16px; }
  .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; display: none; max-width: none; }
  .lv1.is-open > .sub-menu { display: block; }
  .sub-inner { display: block; min-height: 0; }
  .col-main { border: 0; margin: 0; padding: 0 0 10px; }
  .col-main .sub-title, .col-kids { display: none; }
  .col-aside { border-radius: 12px; padding: 18px; margin-bottom: 16px; }
  .mobile-utility { display: flex; flex-wrap: wrap; gap: 10px 22px; list-style: none; padding: 22px 0; margin: 0; font-size: 14px; }
  .mobile-utility a { text-decoration: none; }
  .hero-card, .twocol > .wrap, .code-grid, .readme-grid, .diag-split, .with-side, .with-aside, .split { grid-template-columns: 1fr; }
  .twocol.reverse .tc-visual { order: 0; }
  .tc-visual .illu { max-width: 420px; }
  .doc-grid { grid-template-columns: 1fr; }
  .toc { position: static; max-height: none; }
  .layers li { grid-template-columns: 1fr; gap: 6px; margin-left: 0; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .mainbar { gap: 14px; padding-top: 12px; }
  .logo { font-size: 1.75rem; }
  .logo-mark { width: 32px; height: 32px; }
  .grid.cols-2, .grid.cols-3, .grid.cols-4, .grid.cols-5, .steps { grid-template-columns: 1fr; }
  .flow-step:not(:last-child)::after { right: 50%; top: auto; bottom: -18px; transform: translateX(50%) rotate(135deg); }
  .timeline { grid-template-columns: 1fr 1fr; }
  .f-top { grid-template-columns: 1fr 1fr; }
  .outline { columns: 1; }
  .block.section-orange, .page-head { margin-left: 8px; margin-right: 8px; border-radius: 22px; }
  .hero { padding: 6px 8px 16px; }
  .hero-card { border-radius: 22px; }
  .diagram img { min-width: 640px; }
  th, td { padding: 10px 12px; }
}

/* spacing fixes found in review */
.loc-sec .stats, .opt-sec .stats { margin-bottom: 32px; }
.deck-sec h2 { margin-top: 56px; }
.deck-sec .code-grid h2 { margin-top: 0; }
.deck-sec .stats .stat-v { font-size: clamp(1.6rem, 2.4vw, 2.2rem); white-space: nowrap; }
@media (max-width: 1080px) {
  body.nav-open .announce { display: none; }
  .nav-primary { top: var(--header-h, 72px); }
}

/* language switcher (top right of the main bar) */
.lang-switch { position: relative; flex: none; }
.lang-btn { display: inline-flex; align-items: center; gap: 8px; background: var(--white); border: 1px solid var(--gris-03); border-radius: 30px; padding: 9px 14px; font: 600 13px var(--font-nav); color: var(--coal); cursor: pointer; }
.lang-btn:hover, .lang-switch.is-open .lang-btn { border-color: var(--coal); }
.lang-btn .chev { transition: transform .2s; }
.lang-switch.is-open .lang-btn .chev { transform: rotate(180deg); }
.lang-btn:focus:not(:focus-visible) { outline: none; }
.flag { width: 22px; height: 15px; flex: none; border-radius: 3px; box-shadow: 0 0 0 1px rgba(44, 42, 42, .12); }
.lang-menu { position: absolute; right: 0; top: calc(100% + 8px); min-width: 180px; list-style: none; margin: 0; padding: 8px; background: var(--white); border-radius: 10px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity .15s, transform .15s, visibility .15s; z-index: 60; }
.lang-switch.is-open .lang-menu { opacity: 1; visibility: visible; transform: none; }
.lang-menu a { display: flex; align-items: center; gap: 12px; padding: 9px 12px; border-radius: 8px; text-decoration: none; font: 500 14px var(--font-nav); color: var(--coal); }
.lang-menu a:hover { background: var(--gris-01); color: var(--orange); }
.lang-menu a[aria-current] { background: var(--gris-01); font-weight: 600; }
.hero-kicker { display: inline-block; background: var(--white); border-radius: 30px; padding: 7px 16px; font: 600 13px/1.4 var(--font-nav); color: var(--coal); margin-bottom: 20px; }
.hero-kicker a { color: var(--orange); }
.f-pub a { color: var(--lime); text-decoration: none; font-weight: 600; }
@media (max-width: 1080px) {
  .lang-switch { margin-left: auto; }
  .burger { margin-left: 4px; }
  .lang-btn span { display: none; }
  .lang-btn { padding: 8px 10px; }
}

/* hero media: animated GIFs with tabs, in the dark panel above the tagline */
.hero-media { display: flex; flex-direction: column; gap: 12px; }
.media-tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.media-tab { border: 1px solid rgba(255, 255, 255, .25); background: transparent; color: var(--white); border-radius: 30px; padding: 7px 16px; font: 600 13px var(--font-nav); cursor: pointer; }
.media-tab:hover { border-color: var(--lime); color: var(--lime); }
.media-tab.is-active { background: var(--lime); border-color: var(--lime); color: var(--coal); }
.media-tab:focus:not(:focus-visible) { outline: none; }
.media-pane { display: block; border-radius: 12px; overflow: hidden; background: #1e1d1d; line-height: 0; }
.media-pane[hidden] { display: none; }
.media-pane img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 10; object-fit: contain; background: #1e1d1d; }

/* Features left out of the rewrite (component pages #removed, architecture/removed-features.html) */
.removed-card h3 { font-size: 1.15rem; }
.removed-card h4 { margin: 10px 0 0; font: 600 12px var(--font-nav); text-transform: uppercase; letter-spacing: .05em; color: var(--carbon); }
.removed-card .taken { display: flex; align-items: center; gap: 8px; background: var(--gris-01); border-radius: 8px; padding: 6px 10px; }
.removed-card .taken .ic { width: 16px; height: 16px; color: var(--orange); flex: none; }
.removed-card .src { margin-top: auto; padding-top: 8px; font-size: .8rem; color: var(--steel); overflow-wrap: anywhere; }
.removed-card.k-platform .tag { background: var(--lime); }
.removed-card.k-obsolete .tag { background: var(--gris-02); }
.removed-card.k-simplified .tag { background: var(--light-violet); }
.removed-cat { display: flex; align-items: center; gap: 12px; margin: 34px 0 12px; }
.removed-cat .ic { width: 26px; height: 26px; color: var(--orange); }
.removed-all .stats { margin-bottom: 10px; }

/* REST API inventory (component pages #api, components/<id>-api.html) and compatibility tests (#tests) */
.api-st { display: inline-block; white-space: nowrap; border-radius: 8px; padding: 3px 10px; font: 600 12px var(--font-nav); }
.api-st.st-ok { background: var(--lime); color: var(--coal); }
.api-st.st-part { background: #ffe3d1; color: #a33d00; }
.api-st.st-no { background: var(--coal); color: var(--white); }
.api-st.st-gone { background: var(--gris-02); color: var(--carbon); }
.api-stats .stat-l { margin-top: 6px; }
.api-legend { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 8px; font-size: .95rem; }
.api-legend .api-st { margin-right: 8px; }
.api-table td { vertical-align: top; }
.api-table td.op code { white-space: normal; overflow-wrap: anywhere; }
.api-table code.act { background: var(--light-violet); }
.api-table td.meth { font: 600 12px var(--mono); }
.api-table .m-get { color: #12688f; } .api-table .m-post { color: #2f7d18; } .api-table .m-put, .api-table .m-patch { color: #a33d00; }
.api-table .m-delete { color: #b3261e; }
.api-list .tabs { flex-wrap: wrap; }
.section-soft { background: var(--gris-01); }
@media (max-width: 720px) {
  .api-table table { min-width: 0; width: 100%; }
  .api-table thead { display: none; }
  .api-table tr { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 6px 12px; padding: 10px 12px; }
  .api-table td { padding: 0; border: 0; }
  .api-table td.op, .api-table td.note-c { grid-column: 1 / -1; }
  .api-table td.note-c:empty { display: none; }
}
.test-card h3 { font-size: 1.15rem; }
.test-card h4 { margin: 10px 0 0; font: 600 12px var(--font-nav); text-transform: uppercase; letter-spacing: .05em; color: var(--carbon); }
.test-card .result { display: flex; gap: 8px; align-items: flex-start; background: #f4ffd1; border-radius: 8px; padding: 8px 10px; }
.test-card .result .ic { width: 18px; height: 18px; color: #2f7d18; flex: none; margin-top: 2px; }
.test-card .src { margin-top: auto; padding-top: 8px; font-size: .8rem; color: var(--steel); overflow-wrap: anywhere; }

/* Overflow guards: a grid track in 1fr grows to the min-content of its items, so one long word, inline code or
   <pre> line widened the whole page on phones and tablets. Grid items may shrink; long tokens break; code blocks,
   tables, Mermaid and diagrams scroll inside their own box. Keep these rules when adding a layout. */
.grid > *, .readme-grid > *, .doc-grid > *, .with-side > *, .with-aside > *, .split > *, .twocol > .wrap > *,
.code-grid > *, .diag-split > *, .hero-card > *, .sub-inner > *, .flow > *, .stats > *, .steps > *, .vchips > *,
.timeline > *, .f-top > *, .layers li > * { min-width: 0; }
.prose, .card, .toc, .page-head, .faq, .facts { overflow-wrap: break-word; }
.prose :not(pre) > code, .card code, .toc a, .facts dd, .spec-card h3 { overflow-wrap: anywhere; }
.prose pre, pre.code { max-width: 100%; }
.prose img, .prose svg:not(.mermaid-wrap svg), .card img { max-width: 100%; height: auto; }
.prose table { min-width: 0; }
@media (max-width: 960px) and (min-width: 721px) {
  .grid.cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
/* card titles sit in a flex row: let a long compound word (German) wrap instead of widening the card */
.card-top > * { min-width: 0; }
.card h3 { overflow-wrap: break-word; hyphens: auto; }