/* Strategic Labs — V002-M2 base: reset, typography, surfaces, primitives,
   brand-derived motion. Logical properties throughout for RTL correctness. */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); color: var(--ink); scroll-padding-top: calc(var(--header-h) + var(--s5)); }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: 'IBM Plex Sans Arabic', Arial, sans-serif;
  font-size: var(--fs-body); line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  /* deliberately no overflow-x:hidden — it would mask real horizontal overflow
     from the responsive QA harness. Layout is kept correct instead. */
}
img, svg, video { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--mint); color: var(--brand-deep); }
:focus-visible { outline: 3px solid var(--brand-2); outline-offset: 3px; border-radius: var(--r-xs); }
.section--dark :focus-visible, .site-footer :focus-visible { outline-color: var(--mint); }

.wrap, .container { width: var(--content); margin-inline: auto; }
.section { position: relative; padding-block: var(--sec); }
.section--tight { padding-block: var(--sec-tight); }

/* ---------- surfaces ---------- */
.section--wash   { background: var(--mint-wash); }
.section--paper2 { background: var(--paper-2); }
.section--dark {
  background: var(--ink-800); color: var(--on-dark); overflow: clip; isolation: isolate;
}
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: var(--on-dark); }
.section--dark p, .section--dark li { color: var(--on-dark-soft); }
.section--dark .eyebrow { color: var(--brand); }
.section--dark .lead { color: var(--on-dark-soft); }

/* brand-derived living surface: slow layered green drift + stripe motif.
   CSS-only (no shader/WebGL runtime), fully stilled under reduced motion. */
.section--dark::before {
  content: ""; position: absolute; inset: -20% -10%; z-index: -2; pointer-events: none;
  background:
    radial-gradient(60% 55% at 78% 18%, rgba(68,188,167,.20), transparent 62%),
    radial-gradient(52% 48% at 18% 72%, rgba(21,112,94,.34), transparent 66%),
    radial-gradient(44% 60% at 52% 108%, rgba(174,226,209,.10), transparent 60%);
  animation: sl-drift var(--t-drift) ease-in-out infinite alternate;
}
.section--dark::after {
  content: ""; position: absolute; inset-block: 0; inset-inline-end: 0; z-index: -1;
  inline-size: min(340px, 34%); pointer-events: none; opacity: .10;
  background-image: repeating-linear-gradient(to bottom, var(--mint) 0 1px, transparent 1px 7px);
  -webkit-mask-image: radial-gradient(75% 90% at 100% 0%, #000 30%, transparent 72%);
          mask-image: radial-gradient(75% 90% at 100% 0%, #000 30%, transparent 72%);
}
@keyframes sl-drift {
  from { transform: translate3d(0,0,0) scale(1); }
  to   { transform: translate3d(-2.5%, 2%, 0) scale(1.06); }
}

/* arc / dome motif — derived from the logo's quarter-round geometry */
.sl-arc-top {
  position: absolute; inset-inline: -6%; inset-block-start: -1px; block-size: clamp(60px, 7vw, 120px);
  background: var(--paper); border-end-start-radius: 50% 100%; border-end-end-radius: 50% 100%;
  z-index: -1; pointer-events: none;
}
.sl-arc-top--wash { background: var(--mint-wash); }
.sl-arc-bottom {
  position: absolute; inset-inline: -6%; inset-block-end: -1px; block-size: clamp(60px, 7vw, 120px);
  background: var(--paper); border-start-start-radius: 50% 100%; border-start-end-radius: 50% 100%;
  z-index: -1; pointer-events: none;
}

/* ---------- typography ---------- */
h1 { margin: 0; font-size: var(--fs-h1); line-height: var(--lh-tight); font-weight: 700; letter-spacing: -.015em; text-wrap: balance; }
.h2, .sec-head h2, .section-heading h2 { margin: 0; font-size: var(--fs-h2); line-height: 1.28; font-weight: 700; letter-spacing: -.012em; text-wrap: balance; }
h2, h3, h4 { color: var(--ink); }
h3 { margin: 0 0 var(--s3); font-size: var(--fs-h3); line-height: 1.45; font-weight: 600; }
h4 { margin: 0 0 var(--s2); font-size: var(--fs-h4); font-weight: 600; }
p { margin-block: 0 var(--s4); }
.lead { font-size: var(--fs-lead); line-height: 1.8; color: var(--ink-soft); max-width: 62ch; }
.muted, .field-hint, .form-footer-note { color: var(--muted); }
.lat { font-family: Arial, sans-serif; font-variant-numeric: tabular-nums; letter-spacing: .01em; }

.eyebrow {
  display: inline-flex; align-items: center; gap: .6em; margin: 0 0 var(--s4);
  font-size: var(--fs-eyebrow); font-weight: 700; letter-spacing: .06em; color: var(--brand-mid);
}
.eyebrow::before { content: ""; inline-size: 1.4em; block-size: 2px; border-radius: 2px; background: var(--brand); }

.prose { max-width: 68ch; color: var(--ink-soft); line-height: 1.95; }
.prose h2, .prose h3, .prose h4 { margin: 2em 0 .7em; color: var(--ink); }
.prose p, .prose ul, .prose ol, .prose blockquote { margin-block: 0 1.05em; }
.prose a { color: var(--brand-mid); text-decoration: underline; text-underline-offset: 4px; text-decoration-thickness: 1px; }
.prose blockquote { margin-inline: 0; padding: var(--s5); background: var(--mint-wash); border-inline-start: 3px solid var(--brand); border-radius: var(--r-sm); color: var(--ink); }

/* ---------- section intro: heading bound to its supporting copy ----------
   Replaces M1's floating side-copy anti-pattern site-wide. */
.sl-intro {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(1.5rem, 3vw, 4rem); align-items: start; margin-bottom: var(--s8);
}
.sl-intro__head { min-width: 0; }
.sl-intro__body { min-width: 0; }
.sl-intro__body > p { color: var(--ink-soft); max-width: 60ch; }
.sl-intro__body > p:last-of-type { margin-bottom: 0; }
.sl-intro .cta__actions { margin-top: var(--s5); }
.sl-intro--center { grid-template-columns: 1fr; justify-items: center; text-align: center; max-width: 780px; margin-inline: auto; }
.sl-intro--center .lead { margin-inline: auto; }
.sl-intro--stack { grid-template-columns: 1fr; gap: var(--s4); }
.sec-head { max-width: 62ch; margin-bottom: var(--s7); display: grid; gap: var(--s3); }

/* ---------- institutional note: supporting copy, never floating ---------- */
.sl-note {
  display: grid; grid-template-columns: auto 1fr; gap: var(--s4); align-items: start;
  padding: var(--s5); background: var(--mint-wash); border-radius: var(--r-card);
  border-inline-start: 3px solid var(--brand); color: var(--ink-soft);
}
.sl-note__mark { inline-size: 26px; block-size: 26px; border-radius: 50%; background: var(--brand); display: grid; place-items: center; color: var(--ink-900); font-weight: 700; font-size: .8rem; flex: none; }
.sl-note p { margin: 0; }
.sl-note p + p { margin-top: var(--s3); }
.section--dark .sl-note { background: rgba(174,226,209,.07); border-inline-start-color: var(--brand); color: var(--on-dark-soft); }

/* ---------- cards: designed objects, not table cells ---------- */
.sl-card {
  position: relative; background: var(--white); border: 1px solid var(--line);
  border-radius: var(--r-card); padding: var(--s6); box-shadow: var(--e1);
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease), border-color var(--t) var(--ease);
}
.sl-card--hover:hover, .sl-card--hover:focus-visible { transform: translateY(-3px); box-shadow: var(--e3); border-color: var(--mint); }
.sl-card__index { font-size: var(--fs-eyebrow); font-weight: 700; color: var(--brand-mid); font-family: Arial, sans-serif; }
.section--dark .sl-card { background: rgba(255,255,255,.045); border-color: var(--line-dark); box-shadow: none; backdrop-filter: blur(2px); }
.section--dark .sl-card--hover:hover { background: rgba(255,255,255,.075); border-color: var(--line-dark-str); transform: translateY(-3px); }

/* card grids — auto-fit so a short final row never leaves an empty cell */
.sl-grid { display: grid; gap: var(--s5); }
.sl-grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.sl-grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.sl-grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }

/* ---------- buttons ---------- */
.btn, .button {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  min-height: 48px; padding: .8rem 1.6rem; border-radius: var(--r-pill);
  border: 1.5px solid transparent; font-weight: 600; font-size: var(--fs-sm); cursor: pointer;
  transition: transform var(--t) var(--ease), background var(--t) var(--ease), border-color var(--t) var(--ease), color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.btn--primary, .button--primary { background: var(--brand-deep); color: var(--on-dark); border-color: var(--brand-deep); box-shadow: var(--e1); }
.btn--primary:hover, .button--primary:hover { background: var(--brand-mid); border-color: var(--brand-mid); transform: translateY(-2px); box-shadow: var(--e2); }
.btn--ghost { background: transparent; color: var(--brand-deep); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--brand-deep); background: var(--white); transform: translateY(-2px); }
.btn--sm { min-height: 42px; padding: .6rem 1.15rem; }
.btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.section--dark .btn--primary, .site-footer .btn--primary { background: var(--brand); color: var(--ink-900); border-color: var(--brand); }
.section--dark .btn--primary:hover, .site-footer .btn--primary:hover { background: var(--mint); border-color: var(--mint); }
.section--dark .btn--ghost, .site-footer .btn--ghost { color: var(--on-dark); border-color: var(--line-dark-str); }
.section--dark .btn--ghost:hover, .site-footer .btn--ghost:hover { border-color: var(--mint); background: rgba(174,226,209,.08); }
.cta__actions, .action-row, .request-actions { display: flex; gap: var(--s3); flex-wrap: wrap; align-items: center; }

/* inline "explore" link with arrow */
.sl-link { display: inline-flex; align-items: center; gap: .45rem; font-weight: 600; color: var(--brand-mid); }
.sl-link svg, .sl-link span[aria-hidden] { transition: transform var(--t) var(--ease); }
.sl-link:hover svg, .sl-link:hover span[aria-hidden] { transform: translateX(-4px); }

.skip-link {
  position: fixed; inset-block-start: 10px; inset-inline-start: 10px; z-index: var(--z-skip);
  background: var(--brand-deep); color: var(--on-dark); padding: .7rem 1.2rem; border-radius: var(--r-sm);
  transform: translateY(-220%); transition: transform var(--t) var(--ease);
}
.skip-link:focus { transform: none; }

body[data-nav-open="true"] { overflow: hidden; }

/* ---------- reduced motion: final states, immediately ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important; animation-iteration-count: 1 !important;
    transition-duration: .001ms !important; scroll-behavior: auto !important;
  }
  .section--dark::before { animation: none; transform: none; }
}