/* Next Generation Chemical Ltd — site.css
   One shared stylesheet. See DESIGN-SYSTEM.md for tokens and rules. */

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("/assets/fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("/assets/fonts/inter-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+1E00-1E9F, U+1EF2-1EFF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --ink: #111111;
  --ink-2: #4A4F4C;          /* secondary text, 8.3:1 on white */
  --accent: #0B6E4F;         /* NGC Green, 6.3:1 on white */
  --accent-dark: #08533B;    /* hover / pressed */
  --accent-tint: #E7F1EC;    /* icon and badge backgrounds only */
  --panel: #F5F6F5;
  --line: #E3E5E3;
  --white: #FFFFFF;
  --warn-bg: #FFF7E0;
  --warn-line: #E8D48A;

  --s1: 8px; --s2: 16px; --s3: 24px; --s4: 32px; --s5: 40px; --s6: 48px; --s8: 64px; --s10: 80px; --s12: 96px;
  --radius: 4px;
  --wrap: 1200px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--white);
  font-feature-settings: "cv11", "ss01";
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-dark); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent); outline-offset: 2px;
}
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 var(--s2); font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: clamp(32px, 4.4vw, 48px); letter-spacing: -0.02em; }
h2 { font-size: clamp(26px, 3vw, 34px); }
h3 { font-size: 21px; }
h4 { font-size: 17px; }
p { margin: 0 0 var(--s2); }
ul, ol { margin: 0 0 var(--s2); padding-left: 1.25em; }
li { margin-bottom: 6px; }
small, .small { font-size: 14px; }
.muted { color: var(--ink-2); }
.num, table.grades td, table.watch td:first-child { font-variant-numeric: tabular-nums; }
table.grades--text td { font-variant-numeric: normal; }
table.grades td:not(:nth-child(2)) { white-space: nowrap; }
table.grades--text td:not(:nth-child(2)) { white-space: normal; }
hr { border: 0; border-top: 1px solid var(--line); margin: var(--s6) 0; }

.skip { position: absolute; left: -9999px; top: 0; background: var(--ink); color: #fff; padding: 8px 16px; z-index: 100; }
.skip:focus { left: 8px; top: 8px; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--s3); }
.narrow { max-width: 760px; }
.section { padding: var(--s12) 0; }
.section--tight { padding: var(--s8) 0; }
.section--panel { background: var(--panel); }
.section + .section:not(.section--panel) { border-top: 1px solid var(--line); }
.section--panel + .section { border-top: 0; }

.eyebrow { font-size: 14px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--accent); margin-bottom: var(--s2); }
.lead { font-size: 20px; line-height: 1.55; color: var(--ink-2); max-width: 720px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,0.97); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--s3); min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand svg { flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__ngc { font-weight: 700; font-size: 18px; letter-spacing: 0.02em; }
.brand__full { font-weight: 500; font-size: 13px; color: var(--ink-2); }
.nav { display: flex; align-items: center; gap: var(--s3); }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--s3); }
.nav li { margin: 0; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 500; font-size: 16px; padding: 8px 0; border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--accent); }
.nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }
.nav .btn { color: #fff; border-bottom: 0; padding: 10px 18px; }
.nav-toggle { display: none; }

@media (max-width: 960px) {
  .js .nav-toggle {
    display: inline-flex; align-items: center; gap: 8px; background: none; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 8px 12px; font: inherit; font-size: 15px; font-weight: 500; color: var(--ink); cursor: pointer; min-height: 44px;
  }
  .nav-toggle .bars { width: 18px; height: 12px; position: relative; display: inline-block; }
  .nav-toggle .bars::before, .nav-toggle .bars::after, .nav-toggle .bars span { content: ""; position: absolute; left: 0; right: 0; height: 2px; background: var(--ink); }
  .nav-toggle .bars::before { top: 0; } .nav-toggle .bars span { top: 5px; } .nav-toggle .bars::after { bottom: 0; }
  .site-header .wrap { flex-wrap: wrap; min-height: 64px; }
  .site-header .brand, .js .nav-toggle { margin: 10px 0; }
  .nav { width: 100%; flex-direction: column; align-items: stretch; gap: 0; padding-bottom: var(--s2); }
  .js .nav { display: none; }
  .js .nav.is-open { display: flex; }
  .nav ul { flex-direction: column; gap: 0; }
  .nav li a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 18px; }
  .nav a[aria-current="page"] { border-bottom-color: var(--line); }
  .nav .btn { margin-top: var(--s2); text-align: center; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; font-size: 16px;
  padding: 14px 24px; border-radius: var(--radius); border: 1px solid var(--accent); cursor: pointer; min-height: 48px; line-height: 1.2;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.btn--ghost { background: transparent; color: var(--accent); }
.btn--ghost:hover { background: var(--accent-tint); color: var(--accent-dark); }
.btn--small { padding: 8px 14px; min-height: 36px; font-size: 14px; }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--s2); margin-top: var(--s4); }
.textlink { font-weight: 600; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.textlink:hover { text-decoration: underline; }

/* Hero */
.hero { padding: var(--s10) 0 var(--s8); }
.hero__grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--s8); align-items: center; }
.hero h1 { max-width: 16em; }
.hero__media figure { margin: 0; }
.hero__media img { border-radius: var(--radius); aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.page-hero { padding: var(--s8) 0 var(--s6); border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 18em; }

figcaption, .caption { font-size: 13px; color: var(--ink-2); margin-top: 8px; }

/* Facts strip */
.facts { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.facts ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); }
.facts li { margin: 0; padding: var(--s3) var(--s3) var(--s3) 0; display: flex; gap: 12px; align-items: flex-start; font-size: 15px; font-weight: 500; }
.facts li + li { padding-left: var(--s3); border-left: 1px solid var(--line); }

/* Icons */
.icon { width: 24px; height: 24px; flex: none; stroke: var(--accent); fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.icon-box { width: 48px; height: 48px; border-radius: var(--radius); background: var(--accent-tint); display: inline-flex; align-items: center; justify-content: center; margin-bottom: var(--s2); }

/* Grids and cards */
.grid { display: grid; gap: var(--s3); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s8); align-items: center; }
.split--top { align-items: start; }
.split--contact { grid-template-columns: 1.3fr 0.7fr; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: var(--s4); background: var(--white); display: flex; flex-direction: column; }
.card h3 { font-size: 19px; }
.card p:last-child { margin-bottom: 0; }
.card .textlink { margin-top: auto; padding-top: var(--s2); }
.card--media { padding: 0; overflow: hidden; }
.card--media img { aspect-ratio: 3 / 2; object-fit: cover; width: 100%; }
.card--media .card__body { padding: var(--s3); display: flex; flex-direction: column; flex: 1; }
.section--panel .card { background: var(--white); }

.steps { counter-reset: step; list-style: none; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s3); }
.steps li { counter-increment: step; border-top: 2px solid var(--accent); padding-top: var(--s2); margin: 0; }
.steps li::before { content: counter(step, decimal-leading-zero); display: block; font-weight: 600; color: var(--accent); font-size: 14px; margin-bottom: 8px; }
.steps h3 { font-size: 18px; margin-bottom: 8px; }
.steps p { color: var(--ink-2); font-size: 16px; margin: 0; }

.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s3); }
.values div { border-left: 2px solid var(--accent); padding-left: var(--s2); }
.values h3 { font-size: 18px; margin-bottom: 6px; }
.values p { font-size: 16px; color: var(--ink-2); margin: 0; }

/* Notes */
.note { background: var(--panel); border-left: 3px solid var(--accent); padding: var(--s2) var(--s3); font-size: 15px; color: var(--ink-2); border-radius: 0 var(--radius) var(--radius) 0; margin: var(--s3) 0; }
.note p:last-child { margin: 0; }
.note strong { color: var(--ink); }
.placeholder { background: var(--warn-bg); border: 1px dashed var(--warn-line); padding: 0 4px; border-radius: 2px; color: var(--ink); font-weight: 600; }

/* Sub-navigation (in-page) */
.subnav { position: sticky; top: 72px; z-index: 40; background: var(--white); border-bottom: 1px solid var(--line); }
.subnav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--s3); overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.subnav ul::-webkit-scrollbar { display: none; }
.subnav li { margin: 0; flex: none; }
.subnav a { display: block; padding: 14px 0; text-decoration: none; color: var(--ink-2); font-weight: 500; font-size: 15px; white-space: nowrap; }
.subnav a:hover { color: var(--accent); }
[id] { scroll-margin-top: 140px; }
@media (max-width: 960px) { [id] { scroll-margin-top: 120px; } .subnav { top: 64px; } }

/* Families and tables */
.family { padding: var(--s10) 0; border-top: 1px solid var(--line); }
.family:first-of-type { border-top: 0; }
.family__head { display: grid; grid-template-columns: 1fr auto; gap: var(--s3); align-items: end; margin-bottom: var(--s4); }
.family__head p { margin: 0; max-width: 720px; color: var(--ink-2); }
.family__head p.eyebrow { color: var(--accent); margin-bottom: var(--s2); }
.badge { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; background: var(--accent-tint); color: var(--accent-dark); padding: 4px 8px; border-radius: 2px; margin-bottom: var(--s1); }
.table-group { margin-top: var(--s5); }
.table-group h3 { font-size: 18px; margin-bottom: var(--s1); }
.table-group > p { color: var(--ink-2); font-size: 15px; margin-bottom: var(--s2); max-width: 760px; }
.table-scroll { position: relative; overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--line); border-radius: var(--radius); }
table.grades { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 760px; }
table.grades caption { text-align: left; padding: 0 0 8px; font-size: 14px; color: var(--ink-2); }
table.grades th, table.grades td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
table.grades thead th { background: var(--panel); font-weight: 600; font-size: 13px; color: var(--ink); white-space: nowrap; }
table.grades thead th .unit { display: block; font-weight: 400; color: var(--ink-2); font-size: 12px; }
table.grades tbody tr:last-child th, table.grades tbody tr:last-child td { border-bottom: 0; }
table.grades tbody th { font-weight: 600; white-space: nowrap; }
table.grades td.doc { white-space: nowrap; text-align: right; }
table.grades tbody tr:hover { background: #FAFBFA; }
.table-note { font-size: 13px; color: var(--ink-2); margin-top: 8px; }

.legend { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 8px var(--s3); font-size: 14px; color: var(--ink-2); margin: 0; }
.legend dt { font-weight: 600; color: var(--ink); display: inline; }
.legend dd { display: inline; margin: 0; }
.legend div { margin: 0; }

/* Regulation hub */
.rule { border: 1px solid var(--line); border-radius: var(--radius); padding: var(--s4); margin-bottom: var(--s3); background: #fff; }
.rule__meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--s2); }
.tag { font-size: 12px; font-weight: 600; padding: 3px 8px; border-radius: 2px; border: 1px solid var(--line); color: var(--ink-2); background: #fff; }
.tag--market { color: var(--accent-dark); border-color: #BBD8CB; background: var(--accent-tint); }
.rule dl { display: grid; grid-template-columns: 150px 1fr; gap: 8px var(--s3); margin: var(--s2) 0; }
.rule dt { font-weight: 600; font-size: 15px; }
.rule dd { margin: 0; font-size: 16px; }
.sources { font-size: 14px; color: var(--ink-2); border-top: 1px solid var(--line); padding-top: var(--s2); margin-top: var(--s2); }
.sources a { word-break: break-word; }
.sources ul { margin: 6px 0 0; }

table.watch { width: 100%; border-collapse: collapse; font-size: 15px; }
table.watch th, table.watch td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
table.watch thead th { background: var(--panel); font-size: 13px; }
table.watch td:first-child { white-space: nowrap; font-weight: 600; }

/* Article */
.article { padding: var(--s8) 0 var(--s10); }
.article h2 { font-size: 26px; margin-top: var(--s6); }
.article h3 { margin-top: var(--s4); }
.article .meta { font-size: 14px; color: var(--ink-2); margin-bottom: var(--s4); }
.article-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.article-list li { border-bottom: 1px solid var(--line); padding: var(--s3) 0; margin: 0; display: grid; grid-template-columns: 180px 1fr; gap: var(--s3); }
.article-list .date { font-size: 14px; color: var(--ink-2); font-weight: 500; }
.article-list h3 { font-size: 19px; margin-bottom: 6px; }
.article-list h3 a { color: var(--ink); text-decoration: none; }
.article-list h3 a:hover { color: var(--accent); text-decoration: underline; }
.article-list p { margin: 0; color: var(--ink-2); font-size: 16px; }

/* Forms */
.form { display: grid; gap: var(--s2); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s2); }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label, .field legend { font-weight: 500; font-size: 15px; }
.field .opt { color: var(--ink-2); font-weight: 400; }
input[type="text"], input[type="email"], input[type="tel"], select, textarea {
  font: inherit; font-size: 16px; color: var(--ink); background: #fff; border: 1px solid #C9CDCA; border-radius: var(--radius);
  padding: 12px 14px; width: 100%; min-height: 48px;
}
textarea { min-height: 140px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.check input { width: 20px; height: 20px; margin-top: 3px; accent-color: var(--accent); flex: none; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-panel { background: var(--panel); border-radius: var(--radius); padding: var(--s5); }
.form-msg { padding: var(--s2); border-radius: var(--radius); font-size: 15px; }
.form-msg--error { background: #FDECEC; border: 1px solid #E5B4B4; }
.inline-form { display: flex; gap: var(--s1); flex-wrap: wrap; }
.inline-form input[type="email"] { flex: 1 1 260px; }

/* Contact */
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { display: flex; gap: var(--s2); padding: var(--s2) 0; border-bottom: 1px solid var(--line); margin: 0; }
.contact-list li:first-child { padding-top: 0; }
.contact-list strong { display: block; font-size: 14px; color: var(--ink-2); font-weight: 500; }
.contact-list a { font-weight: 600; font-size: 17px; }

/* Breadcrumb */
.breadcrumb { font-size: 14px; color: var(--ink-2); margin-bottom: var(--s2); }
.breadcrumb ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumb li { margin: 0; }
.breadcrumb li + li::before { content: "/"; margin-right: 6px; color: #9AA09C; }
.breadcrumb a { color: var(--ink-2); }

/* Prose (legal) */
.prose h2 { font-size: 22px; margin-top: var(--s5); }
.prose h3 { font-size: 18px; margin-top: var(--s3); }
.prose table { border-collapse: collapse; width: 100%; font-size: 15px; margin-bottom: var(--s2); }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th { background: var(--panel); }

/* CTA band */
.cta-band { background: var(--panel); padding: var(--s8) 0; }
.cta-band .wrap { display: grid; grid-template-columns: 1fr auto; gap: var(--s4); align-items: center; }
.cta-band h2 { margin-bottom: 8px; }
.cta-band p { margin: 0; color: var(--ink-2); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: var(--s8) 0 var(--s4); font-size: 15px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--s4); }
.site-footer h2 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-2); margin-bottom: var(--s2); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--ink); text-decoration: none; }
.site-footer a:hover { color: var(--accent); text-decoration: underline; }
.legal { border-top: 1px solid var(--line); margin-top: var(--s6); padding-top: var(--s3); font-size: 13px; color: var(--ink-2); display: grid; gap: 6px; }
.legal p { margin: 0; }

/* Responsive */
@media (max-width: 1080px) {
  .grid-4, .steps, .values { grid-template-columns: repeat(2, 1fr); }
  .facts ul { grid-template-columns: repeat(2, 1fr); }
  .facts li:nth-child(3) { padding-left: 0; border-left: 0; }
  .facts li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .hero__grid, .split, .split--contact, .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero__grid, .split { gap: var(--s5); }
  .hero { padding: var(--s6) 0 var(--s6); }
  .section { padding: var(--s8) 0; }
  .family { padding: var(--s8) 0; }
  .family__head { grid-template-columns: 1fr; }
  .cta-band .wrap { grid-template-columns: 1fr; }
  .article-list li { grid-template-columns: 1fr; gap: 6px; }
  .rule dl { grid-template-columns: 1fr; gap: 2px; }
  .rule dd { margin-bottom: 10px; }
  .form-row { grid-template-columns: 1fr; }
  .split .hero__media { order: -1; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  h1 { font-size: 31px; }
  h2 { font-size: 25px; }
  .wrap { padding: 0 var(--s2); }
  .lead { font-size: 18px; }
  .grid-4, .steps, .values, .facts ul, .footer-grid { grid-template-columns: 1fr; }
  .facts li, .facts li + li { padding: var(--s2) 0; border-left: 0; }
  .facts li + li { border-top: 1px solid var(--line); }
  .btn-row .btn { width: 100%; }
  .card, .rule { padding: var(--s3); }
  .form-panel { padding: var(--s3); }
  .brand__full { font-size: 12px; }
  table.watch td:first-child { white-space: normal; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print { .site-header, .subnav, .site-footer, .cta-band, .btn { display: none !important; } }