/* Regulations and standards page: Saudi framework (A), filterable library (B), code-to-handover flow (C), editions note (D). */

/* ---------- hero ---------- */
.std-hero .std-honest { margin-top: 20px; max-width: 52ch; font-size: var(--fs-small); color: var(--on-dark-3); padding-inline-start: 14px; border-inline-start: 2px solid var(--copper-lite); }
.std-stack svg { fill: none; stroke-linecap: butt; stroke-linejoin: miter; }
.std-stack svg :is(path, rect) { vector-effect: non-scaling-stroke; }
.std-stack .sh { fill: var(--midnight); }
.std-stack text { stroke: none; }
.std-stack .ref { font-family: var(--f-mono); font-size: var(--fs-annot); }
.std-stack .title-block { margin-top: 12px; border: 1px solid var(--hair-dark); max-width: 500px; margin-inline-start: auto; }
@media (max-width: 960px) { .std-stack .title-block { margin-inline-start: 0; } }
@media (max-width: 520px) { .std-stack { display: none; } }

.std-toc { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: clamp(40px, 5vw, 64px); border-top: 1px solid var(--hair-dark); }
.std-toc a { display: flex; align-items: baseline; gap: 12px; min-height: 44px; padding: 16px 16px 4px 0; color: var(--on-dark-2); font-size: var(--fs-small); font-weight: 500; line-height: 1.4; transition: color .15s; }
html[dir="rtl"] .std-toc a { padding: 16px 0 4px 16px; }
.std-toc a + a { padding-inline-start: 16px; border-inline-start: 1px solid var(--hair-dark); }
.std-toc a:hover { color: #fff; }
.std-toc b { color: var(--copper-lite); font-weight: 500; }
@media (max-width: 760px) {
  .std-toc { grid-template-columns: minmax(0, 1fr); }
  .std-toc a, html[dir="rtl"] .std-toc a, .std-toc a + a { padding: 12px 0; border-inline-start: 0; border-bottom: 1px solid var(--hair-dark); }
}

/* ---------- A: Saudi regulations ---------- */
.reg-list { border-top: 1px solid var(--ink); }
.reg { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 2fr); gap: 20px clamp(32px, 5vw, 72px); padding: 36px 0 40px; border-bottom: 1px solid var(--hair); scroll-margin-top: calc(var(--header-h) + 24px); }
.reg-h { display: grid; gap: 8px; align-content: start; }
.reg-n { font-size: var(--fs-2xs); color: var(--slate); }
.reg-h h3 { font-size: clamp(1.25rem, 1.1rem + .6vw, 1.625rem); }
.reg-auth { font-size: var(--fs-small); color: var(--slate); line-height: 1.45; }
.reg-link { justify-self: start; display: inline-block; padding-block: 12px; line-height: 1.4; font-size: var(--fs-cap); font-weight: 600; color: var(--copper-ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.reg-link:hover { color: var(--ink); }
.reg-rows { display: grid; gap: 0; border-top: 1px solid var(--hair-strong); }
.reg-rows > div { display: grid; grid-template-columns: minmax(0, 180px) minmax(0, 1fr); gap: 6px 28px; padding: 14px 0; border-bottom: 1px solid var(--hair); }
.reg-rows dt { font: 600 var(--fs-cap)/1.45 var(--f-body); color: var(--slate); padding-top: 3px; }
.reg-rows dd { color: var(--ink-2); max-width: 70ch; }
.reg-rows .how dd { color: var(--ink); }
.reg-rows .how dt { color: var(--copper-ink); }
.ct { color: inherit; text-decoration: underline; text-decoration-color: var(--hair-strong); text-underline-offset: 3px; font-variant-numeric: tabular-nums; }
.ct:hover { text-decoration-color: currentColor; }
.sbc-parts { grid-column: 2; font-size: var(--fs-small); margin-top: 8px; }
.sbc-parts td { padding-block: 10px; }
.sbc-parts td:first-child { white-space: nowrap; font-family: var(--f-mono); font-size: var(--fs-sm); font-weight: 500; color: var(--copper-ink); }
.sbc-parts td:last-child { color: var(--slate); }
.sbc-parts .row-safe td { border-top: 1px solid var(--ink); }
.sbc-checked { grid-column: 2; font-size: var(--fs-2xs); color: var(--slate); }
.reg-aside { grid-column: 2; display: grid; gap: 8px; padding: 20px 24px; background: var(--paper-hi); border: 1px solid var(--hair); border-inline-start: 3px solid var(--copper); }
.reg-aside h4 { font: 600 var(--fs-base)/1.4 var(--f-body); color: var(--ink); }
.reg-aside p { font-size: var(--fs-small); color: var(--ink-2); max-width: 75ch; }
@media (max-width: 960px) {
  .reg { grid-template-columns: minmax(0, 1fr); }
  .sbc-parts, .sbc-checked, .reg-aside { grid-column: 1; }
}
@media (max-width: 560px) { .reg-aside { padding: 16px; } }
@media (max-width: 560px) { .reg-rows > div { grid-template-columns: minmax(0, 1fr); } }

/* ---------- B: library ---------- */
.lib-tools { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; padding: 24px; margin-bottom: 40px; background: var(--paper-hi); border: 1px solid var(--hair); border-top: 2px solid var(--ink); }
.lib-tools[hidden] { display: none; }
.lib-search { display: grid; gap: 8px; max-width: 640px; }
.lib-search label, .lib-facet-h { font: 600 var(--fs-cap)/1.4 var(--f-body); color: var(--slate); }
.lib-search input { font: inherit; font-size: 16px; width: 100%; min-height: 48px; padding: 12px 16px 12px 44px; border: 1px solid var(--hair-strong); border-radius: var(--r-xs); background: var(--white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 18 18'%3E%3Ccircle cx='7.5' cy='7.5' r='5.5' fill='none' stroke='%23575e6b' stroke-width='1.5'/%3E%3Cpath d='M11.6 11.6 16 16' stroke='%23575e6b' stroke-width='1.5'/%3E%3C/svg%3E") no-repeat 14px center; color: var(--ink); transition: border-color .15s; }
html[dir="rtl"] .lib-search input { padding: 12px 44px 12px 16px; background-position: right 14px center; }
.lib-search input:hover { border-color: #6f6a60; }
.lib-search input:focus-visible { outline: 2px solid var(--focus); outline-offset: 1px; border-color: var(--ink); }
.lib-search input::placeholder { color: var(--slate-2); }
.lib-facet { display: grid; gap: 8px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 14px; border: 1px solid var(--hair-strong); border-radius: var(--r); background: var(--white); font-size: var(--fs-sm); font-weight: 500; line-height: 1.3; color: var(--ink); transition: background .12s, color .12s, border-color .12s, transform 80ms linear; }
.chip-btn:hover { border-color: var(--ink); }
.chip-btn:active { transform: translateY(1px); }
.chip-btn[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: #fff; box-shadow: inset 0 1px 2px rgba(0, 0, 0, .35); }
.lib-status { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; padding-top: 14px; border-top: 1px solid var(--hair); }
.lib-count { font-size: var(--fs-small); font-weight: 600; font-variant-numeric: tabular-nums; }
.lib-reset { min-height: 44px; font-size: var(--fs-sm); font-weight: 600; color: var(--copper-ink); text-decoration: underline; text-underline-offset: 3px; }
.lib-reset[hidden] { display: none; }
.lib-empty { padding: 24px; border: 1px dashed var(--hair-strong); color: var(--slate); margin-bottom: 32px; }
.lib-empty[hidden] { display: none; }

.lib-group { scroll-margin-top: calc(var(--header-h) + 24px); }
.lib-group + .lib-group { margin-top: 48px; }
.lib-group[hidden] { display: none; }
.lib-group > h3 { font-size: var(--fs-lg); padding-bottom: 12px; border-bottom: 1px solid var(--ink); }
.lib-item { display: grid; grid-template-columns: minmax(0, 13rem) minmax(0, 1fr) minmax(0, 12rem); gap: 8px 32px; padding: 20px 0; border-bottom: 1px solid var(--hair-strong); }
.lib-item[hidden] { display: none; }
.lib-code { display: grid; gap: 2px; align-content: start; max-width: none; }
.lib-code b { font: 600 1.125rem/1.3 var(--f-display); color: var(--copper-ink); letter-spacing: -0.005em; }
.lib-code small { font-size: var(--fs-2xs); color: var(--slate); }
.lib-main { display: grid; gap: 6px; }
.lib-main h4 { font: 600 var(--fs-base)/1.4 var(--f-body); color: var(--ink); }
.lib-main p { font-size: var(--fs-small); color: var(--ink-2); line-height: 1.55; }
.lib-main .lib-use { color: var(--slate); }
.lib-main .lib-use b { color: var(--ink); font-weight: 600; }
.lib-tags { display: flex; flex-wrap: wrap; align-content: start; gap: 4px; max-width: none; }
.lib-tags > span { display: inline-block; padding: 2px 8px; border: 1px solid var(--hair-strong); border-radius: var(--r-xs); font-size: var(--fs-2xs); line-height: 1.5; color: var(--slate); background: var(--paper-hi); }
.lib-tags .o-sa { border-color: var(--copper-ink); color: var(--copper-ink); }
.lib-tags .o-ref { border-style: dashed; border-color: var(--copper-ink); color: var(--ink); }
html[lang="ar"] .lib-tags > span, html[lang="ar"] .lib-code small { font-size: var(--fs-xs); }
@media (max-width: 1080px) {
  .lib-item { grid-template-columns: minmax(0, 11rem) minmax(0, 1fr); }
  .lib-tags { grid-column: 2; }
}
@media (max-width: 640px) {
  .lib-tools { padding: 18px 16px; margin-inline: calc(-1 * var(--gutter) + 8px); }
  .lib-item { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .lib-tags { grid-column: 1; }
  .chip-btn { padding: 0 12px; }
}

/* ---------- C: code-to-handover flow (drawing) ---------- */
.flow { margin: 0; background: var(--paper-hi); }
.flow-steps { position: relative; padding: clamp(20px, 3vw, 36px) clamp(16px, 3vw, 40px) 8px; counter-reset: none; }
.flow-step { position: relative; display: grid; grid-template-columns: 48px minmax(0, 1.4fr) minmax(0, 1fr); gap: 8px 32px; padding-bottom: 32px; }
/* the spine: a pen line from each bubble to the next; dashed into a conditional step */
.flow-step::before { content: ""; position: absolute; inset-inline-start: 23px; top: 44px; bottom: 0; border-inline-start: 1.5px solid var(--ink-2); }
.flow-step:last-child::before { content: none; }
.flow-step:has(+ .is-cond)::before, .flow-step.is-cond::before { border-inline-start-style: dashed; border-inline-start-color: var(--copper-ink); }
.flow-step:last-child { padding-bottom: 20px; }
.flow-bub { position: relative; z-index: 1; display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; border: 1.5px solid var(--ink); background: var(--white); font-size: var(--fs-sm); font-weight: 500; color: var(--ink); }
.flow-step.is-cond .flow-bub { border-style: dashed; border-color: var(--copper-ink); color: var(--copper-ink); }
.flow-main { padding-top: 10px; }
.flow-main h3 { font-size: var(--fs-lg); margin-bottom: 6px; }
.flow-main p { color: var(--slate); font-size: var(--fs-small); }
.flow-if { display: inline-block; vertical-align: middle; margin-inline-start: 6px; padding: 1px 8px; border: 1px dashed var(--copper-ink); border-radius: var(--r-xs); font: 600 var(--fs-2xs)/1.5 var(--f-body); color: var(--copper-ink); letter-spacing: 0; }
.flow-meta { display: grid; gap: 10px; align-content: start; padding-top: 12px; }
.flow-meta dt { font: 600 var(--fs-2xs)/1.4 var(--f-body); color: var(--slate); margin-bottom: 4px; }
.flow-meta dd { font-size: var(--fs-small); color: var(--ink-2); line-height: 1.45; }
.flow-ct { display: flex; flex-wrap: wrap; gap: 6px; }
.flow-ct .tag { display: inline-flex; align-items: center; min-height: 28px; padding: 0 8px; border: 1px solid var(--hair-strong); border-radius: var(--r-xs); font-size: var(--fs-2xs); color: var(--copper-ink); background: var(--white); }
.flow-ct .tag:hover { border-color: var(--copper-ink); }
.flow .title-block > span { white-space: normal; }
@media (max-width: 860px) {
  .flow-step { grid-template-columns: 48px minmax(0, 1fr); }
  .flow-meta { grid-column: 2; padding-top: 0; }
}
@media (max-width: 420px) {
  .flow-step { grid-template-columns: 36px minmax(0, 1fr); gap: 8px 14px; }
  .flow-bub { width: 36px; height: 36px; font-size: var(--fs-2xs); }
  .flow-step::before { inset-inline-start: 17px; top: 36px; }
  .flow-main { padding-top: 4px; }
}

/* ---------- D: editions and sources ---------- */
.ed-note { display: grid; gap: 14px; padding: 24px 28px; background: var(--paper-hi); border: 1px solid var(--hair); border-inline-start: 3px solid var(--copper); }
.ed-note p { color: var(--ink-2); }
.ed-note .note { margin-top: 4px; }
.src-h { font-size: var(--fs-lg); padding-bottom: 12px; border-bottom: 1px solid var(--ink); }
.src-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: 32px; }
.src-list li { border-bottom: 1px solid var(--hair); }
.src-list a { display: grid; gap: 2px; padding: 12px 0; min-height: 44px; font-size: var(--fs-small); font-weight: 500; }
.src-list a:hover { color: var(--copper-ink); }
.src-list small { font-family: var(--f-mono); font-size: var(--fs-2xs); color: var(--slate); justify-self: start; }
@media (max-width: 960px) { .src-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .src-list { grid-template-columns: minmax(0, 1fr); } }