/* ============================================================
   V11 — LUMEN
   Clean institutional clarity — the register of a well-run
   university consultancy society (Imperial College Union's
   consultancy page was the reference point, not the template).
   White-dominant, generous whitespace, the verified 180DC green
   as a single confident accent, system fonts for zero asset
   weight. Everything is legible, calm, and gets out of the way.
   Built 2026-07-23 already-correct on the V2/V3/V7 rebrand spec.
   ============================================================ */

:root {
  --paper: #FFFFFF;
  --wash: #F6F9F1;          /* near-white green-tinted band ground */
  --tint: #EAF3DF;          /* soft green card/callout tint */
  --ink: #1A2417;           /* warm near-black */
  --ink-soft: #4C5748;      /* secondary text, AA on white */
  --line: #E2E7DB;          /* hairline rules */
  --line-strong: #C9D3BC;
  --green: #78B038;         /* brand green — accents, fills, large surfaces */
  --green-deep: #4A7322;    /* AA-safe green — links, small green text */
  --green-darkest: #3D6B1C;
  --radius: 10px;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow: 0 1px 2px rgba(26,36,23,0.04), 0 8px 24px rgba(26,36,23,0.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.62;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--tint); color: var(--ink); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 1.5rem; }
@media (max-width: 640px) { .wrap { padding: 0 1.1rem; } }

/* ---------- skip ---------- */
.skip { position: absolute; left: -9999px; top: 0; z-index: 100; background: var(--green); color: #fff; padding: 0.6rem 1rem; font-weight: 700; border-radius: 0 0 var(--radius) 0; }
.skip:focus { left: 0; top: 0; }

/* ---------- header ---------- */
header.top { position: sticky; top: 0; z-index: 40; background: rgba(255,255,255,0.92); backdrop-filter: saturate(1.4) blur(8px); border-bottom: 1px solid var(--line); border-top: 3px solid var(--green); }
.top-inner { display: flex; align-items: center; gap: 1.4rem; padding: 0.7rem 0; }
.brand { display: flex; align-items: center; gap: 0.65rem; text-decoration: none; color: var(--ink); }
.brand .logo-mark { width: 2.1rem; height: auto; display: block; }
.brand b { font-weight: 700; font-size: 1rem; line-height: 1.15; letter-spacing: -0.01em; }
.brand small { display: block; font-weight: 400; font-size: 0.72rem; color: var(--ink-soft); letter-spacing: 0.01em; }
header.top nav { margin-left: auto; display: flex; align-items: center; gap: 0.35rem; flex-wrap: wrap; }
header.top nav a { font-size: 0.9rem; font-weight: 500; color: var(--ink-soft); text-decoration: none; padding: 0.45rem 0.7rem; border-radius: 6px; }
header.top nav a:hover, header.top nav a:focus-visible { color: var(--green-deep); background: var(--wash); }
header.top nav a.cta { background: var(--green-deep); color: #fff; font-weight: 600; padding: 0.5rem 1rem; }
header.top nav a.cta:hover, header.top nav a.cta:focus-visible { background: var(--green-darkest); color: #fff; }
@media (max-width: 860px) {
  .top-inner { flex-wrap: wrap; gap: 0.6rem 1rem; }
  header.top nav { width: 100%; margin-left: 0; gap: 0.15rem; overflow-x: auto; }
  header.top nav a { padding: 0.4rem 0.55rem; white-space: nowrap; }
}

/* ---------- breadcrumb ---------- */
.crumb { font-size: 0.78rem; color: var(--ink-soft); letter-spacing: 0.02em; padding: 1.4rem 0 0; }
.crumb a { color: var(--green-deep); text-decoration: underline; text-underline-offset: 2px; }
.crumb a:hover { text-decoration-thickness: 2px; }
.crumb span { color: var(--line-strong); margin: 0 0.4rem; }

/* ---------- type ---------- */
.eyebrow { display: inline-block; font-size: 0.74rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--green-deep); margin-bottom: 0.9rem; }
h1 { font-weight: 800; font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.05; letter-spacing: -0.025em; color: var(--ink); max-width: 18ch; }
h2 { font-weight: 800; font-size: clamp(1.5rem, 3vw, 2.1rem); line-height: 1.12; letter-spacing: -0.02em; }
h3 { font-weight: 700; font-size: 1.12rem; letter-spacing: -0.01em; }
.lede { margin-top: 1.1rem; font-size: 1.15rem; line-height: 1.6; color: var(--ink-soft); max-width: 58ch; }
p a { color: var(--green-deep); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
p a:hover { color: var(--green-darkest); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--green); outline-offset: 2px; border-radius: 3px; }

/* ---------- sections ---------- */
section { padding: 4rem 0; border-bottom: 1px solid var(--line); }
section.band { background: var(--wash); }
section.plain { border-bottom: 1px solid var(--line); }
.sec-head { max-width: 60ch; margin-bottom: 2rem; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 0.5rem; font-family: inherit; font-size: 0.98rem; font-weight: 600; text-decoration: none; padding: 0.8rem 1.5rem; border-radius: 999px; border: 1.5px solid transparent; cursor: pointer; transition: background-color 130ms ease, border-color 130ms ease, transform 130ms ease; }
.btn--primary { background: var(--green-deep); color: #fff; }
.btn--primary:hover, .btn--primary:focus-visible { background: var(--green-darkest); transform: translateY(-1px); }
.btn--ghost { background: transparent; color: var(--green-deep); border-color: var(--line-strong); }
.btn--ghost:hover, .btn--ghost:focus-visible { border-color: var(--green); background: var(--wash); }
.btn-row { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 1.8rem; }

/* ---------- hero ---------- */
.hero { padding: 2.6rem 0 3.4rem; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.35fr 0.65fr; gap: 3rem; align-items: center; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; gap: 2rem; } }
.hero-art { display: grid; place-items: center; background: var(--wash); border: 1px solid var(--line); border-radius: var(--radius); padding: 2rem; }
.hero-art img { max-width: 230px; height: auto; display: block; }

/* fact chips (the "metadata card" device, with real facts only) */
.chips { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.9rem; }
.chip { display: inline-flex; align-items: baseline; gap: 0.5rem; background: var(--tint); color: var(--green-darkest); border-radius: 999px; padding: 0.4rem 0.9rem; font-size: 0.86rem; font-weight: 600; }
.chip b { font-weight: 800; }

/* ---------- fact strip (proof) ---------- */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
@media (max-width: 760px) { .facts { grid-template-columns: 1fr 1fr; gap: 1.2rem; } }
.fact { border-top: 3px solid var(--green); padding-top: 0.9rem; }
.fact b { display: block; font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -0.02em; line-height: 1; color: var(--ink); }
.fact span { display: block; margin-top: 0.45rem; font-size: 0.9rem; color: var(--ink-soft); }

/* ---------- card grids ---------- */
.grid { display: grid; gap: 1.2rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); }
.card--tint { background: var(--wash); box-shadow: none; }
.card .num { font-size: 0.76rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--green-deep); }
.card h3 { margin: 0.6rem 0 0.5rem; }
.card p { font-size: 0.96rem; color: var(--ink-soft); }
.card .top-rule { height: 3px; width: 2.4rem; background: var(--green); border-radius: 2px; margin-bottom: 1rem; }

/* ---------- our work: reserved case cards ---------- */
.work-steps { margin-top: 1.1rem; display: grid; gap: 0.6rem; }
.work-steps div { border-top: 1px dashed var(--line-strong); padding-top: 0.45rem; }
.work-steps em { font-style: normal; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); display: block; }

/* ---------- placeholder (honesty device) ---------- */
.placeholder { display: inline-block; font-size: 0.8rem; line-height: 1.5; color: var(--green-darkest); background: var(--tint); border: 1px dashed var(--line-strong); border-radius: 8px; padding: 0.6rem 0.85rem; }

/* ---------- roles ---------- */
.role h3 { margin-bottom: 0.5rem; }
.role .tagline { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--green-deep); margin-bottom: 0.7rem; }

/* ---------- events + testimonials ---------- */
.callout { background: var(--tint); border-radius: var(--radius); padding: 1.6rem 1.8rem; margin-top: 1.6rem; }
.callout h3 { margin-bottom: 0.4rem; }

/* ---------- team roster ---------- */
.roster { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; margin-top: 1.8rem; }
@media (max-width: 860px) { .roster { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .roster { grid-template-columns: 1fr; } }
.person { text-align: center; }
.person .avatar {
  width: 4.6rem; height: 4.6rem; border-radius: 50%; margin: 0 auto 0.9rem;
  display: grid; place-items: center; background: var(--tint); border: 2px dashed var(--line-strong);
  font-weight: 800; font-size: 1.15rem; color: var(--green-darkest);
}
.person b { display: block; font-size: 1rem; }
.person .role-t { display: block; font-size: 0.85rem; color: var(--ink-soft); margin: 0.15rem 0 0.4rem; }
.person a { font-size: 0.82rem; color: var(--green-deep); text-decoration: none; word-break: break-word; }
.person a:hover { text-decoration: underline; }

/* ---------- timeline (for-clients) ---------- */
.timeline { border-left: 2px solid var(--line-strong); margin-top: 2rem; }
.tl-step { position: relative; padding: 0 0 2rem 1.9rem; }
.tl-step:last-child { padding-bottom: 0; }
.tl-step::before { content: ""; position: absolute; left: -8px; top: 0.35rem; width: 14px; height: 14px; border-radius: 50%; background: var(--green); border: 3px solid var(--paper); box-shadow: 0 0 0 1px var(--green); }
.tl-step .when { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--green-deep); }
.tl-step h3 { margin: 0.25rem 0 0.35rem; }
.tl-step p { color: var(--ink-soft); font-size: 0.98rem; max-width: 56ch; }

/* ---------- service index (for-clients) ---------- */
.svc-list { margin-top: 1.6rem; border-top: 1px solid var(--line); }
.svc-row { display: grid; grid-template-columns: 15rem 1fr; gap: 1.4rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.svc-row b { font-weight: 700; }
.svc-row span { color: var(--ink-soft); font-size: 0.96rem; }
@media (max-width: 640px) { .svc-row { grid-template-columns: 1fr; gap: 0.2rem; } }

/* ---------- forms ---------- */
form label { display: block; margin-bottom: 1rem; }
form .lbl { display: block; font-size: 0.82rem; font-weight: 600; color: var(--ink); margin-bottom: 0.35rem; }
input, textarea { width: 100%; padding: 0.8rem 0.9rem; border: 1.5px solid var(--line-strong); border-radius: 8px; font-family: inherit; font-size: 1rem; color: var(--ink); background: var(--paper); }
input:focus, textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(120,176,56,0.18); }

/* two-column layout helper */
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
@media (max-width: 860px) { .cols { grid-template-columns: 1fr; gap: 2rem; } }

/* ---------- footer ---------- */
footer { background: var(--ink); color: #C9D3BC; padding: 3rem 0 2rem; }
footer a { color: #EAF3DF; text-decoration: none; }
footer a:hover { text-decoration: underline; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 2rem; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr; gap: 1.6rem; } }
footer .lockup-white { max-width: 220px; height: auto; display: block; margin-bottom: 1rem; }
footer h3 { font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: #9DB88A; margin-bottom: 0.8rem; font-weight: 700; }
footer ul { list-style: none; }
footer li { margin-bottom: 0.4rem; font-size: 0.94rem; }
footer p { font-size: 0.94rem; }
.foot-legal { margin-top: 2.4rem; padding-top: 1.2rem; border-top: 1px solid rgba(255,255,255,0.12); font-size: 0.82rem; color: #9DB88A; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.6rem; }
.foot-legal a { color: #9DB88A; }

/* ---------- gentle reveal (JS-gated, reduced-motion-gated) ---------- */
@media (prefers-reduced-motion: no-preference) {
  html.js .reveal { opacity: 0; transform: translateY(12px); transition: opacity 500ms ease, transform 500ms ease; }
  html.js .reveal.in { opacity: 1; transform: none; }
}

/* ============================================================
   ICU-TEMPLATE LAYER (index.html)
   Clean Students'-Union register: centred single column,
   a "Welcome to…" title block, the signature prev/next
   carousel, and a vertically-stacked committee list.
   Recreated in original code — reference feel, our content.
   ============================================================ */

/* narrower reading column for the single-column institutional feel */
.narrow { max-width: 780px; }
.prose > p { max-width: 66ch; }
.prose > p + p { margin-top: 1rem; }

/* ---------- page title block ---------- */
.pagehead { padding: 2.4rem 0 2.8rem; border-bottom: 1px solid var(--line); }
.pagehead .crumb { padding: 0 0 1.4rem; }
.pagehead h1 { max-width: 22ch; }
.tint-word { color: var(--green-deep); }
.meta-line { margin-top: 1rem; font-size: 1rem; color: var(--ink-soft); font-weight: 500; letter-spacing: 0.01em; }
.social-row { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-top: 1.5rem; }
.social { font-size: 0.85rem; font-weight: 600; color: var(--green-deep); text-decoration: none;
  border: 1.5px solid var(--line-strong); border-radius: 999px; padding: 0.35rem 0.95rem;
  transition: border-color 130ms ease, background-color 130ms ease, color 130ms ease; }
.social:hover, .social:focus-visible { border-color: var(--green); background: var(--wash); color: var(--green-darkest); }

/* ---------- CTA band ---------- */
.cta-band { padding: 3.2rem 0; }
.cta-card { display: flex; align-items: center; justify-content: space-between; gap: 2rem 3rem; flex-wrap: wrap;
  background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--green);
  border-radius: var(--radius); padding: 1.8rem 2rem; box-shadow: var(--shadow); }
.cta-card h2 { font-size: clamp(1.35rem, 2.4vw, 1.8rem); }
.cta-card p { margin-top: 0.55rem; color: var(--ink-soft); max-width: 46ch; font-size: 1rem; }
.cta-card .btn-row { margin-top: 0; }

/* ---------- carousel (signature animated element) ---------- */
.carousel { position: relative; margin-top: 0.5rem; }
.carousel-track {
  display: flex; gap: 1.2rem; overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 0.4rem 0.2rem 1.2rem; scroll-padding-left: 0.2rem;
  -webkit-overflow-scrolling: touch; scrollbar-width: none;
}
.carousel-track::-webkit-scrollbar { display: none; }
.carousel-track:focus-visible { outline: 3px solid var(--green); outline-offset: 3px; border-radius: var(--radius); }
.carousel .slide {
  flex: 0 0 clamp(260px, 32%, 340px); scroll-snap-align: start;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.5rem; box-shadow: var(--shadow);
}
.carousel .slide h3 { margin: 0 0 0.5rem; }
.carousel .slide p { font-size: 0.96rem; color: var(--ink-soft); }
.carousel .slide .top-rule { height: 3px; width: 2.4rem; background: var(--green); border-radius: 2px; margin-bottom: 1rem; }

.carousel-btn {
  position: absolute; top: 38%; transform: translateY(-50%); z-index: 5;
  width: 2.6rem; height: 2.6rem; border-radius: 50%; border: 1.5px solid var(--line-strong);
  background: var(--paper); color: var(--green-deep); font-size: 1.4rem; line-height: 1;
  display: grid; place-items: center; cursor: pointer; box-shadow: var(--shadow);
  transition: background-color 130ms ease, border-color 130ms ease, opacity 130ms ease, transform 130ms ease;
}
.carousel-btn:hover:not(:disabled) { background: var(--wash); border-color: var(--green); transform: translateY(-50%) scale(1.06); }
.carousel-btn:disabled { opacity: 0.32; cursor: default; }
.carousel-btn.prev { left: -0.6rem; }
.carousel-btn.next { right: -0.6rem; }
@media (max-width: 720px) { .carousel-btn.prev { left: 0.1rem; } .carousel-btn.next { right: 0.1rem; } }

.carousel-dots { display: flex; justify-content: center; gap: 0.5rem; margin-top: 0.4rem; }
.carousel-dots .dot { width: 8px; height: 8px; padding: 0; border-radius: 50%; border: none; cursor: pointer;
  background: var(--line-strong); transition: background-color 160ms ease, transform 160ms ease; }
.carousel-dots .dot.on { background: var(--green); transform: scale(1.3); }

/* ---------- committee (stacked list) ---------- */
.committee { list-style: none; margin-top: 1.8rem; border-top: 1px solid var(--line); }
.committee .member {
  display: flex; align-items: center; gap: 1rem; padding: 1rem 0.4rem;
  border-bottom: 1px solid var(--line); transition: background-color 130ms ease;
}
.committee .member:hover { background: var(--wash); }
.committee .avatar {
  flex: 0 0 auto; width: 3rem; height: 3rem; border-radius: 50%; margin: 0;
  display: grid; place-items: center; background: var(--tint); border: 2px dashed var(--line-strong);
  font-weight: 800; font-size: 0.9rem; color: var(--green-darkest);
}
.committee .m-body { flex: 1 1 auto; min-width: 0; }
.committee .m-body b { display: block; font-size: 1rem; line-height: 1.2; }
.committee .m-role { display: block; font-size: 0.85rem; color: var(--ink-soft); margin-top: 0.1rem; }
.committee .m-mail { flex: 0 0 auto; font-size: 0.82rem; color: var(--green-deep); text-decoration: none; white-space: nowrap; }
.committee .m-mail:hover { text-decoration: underline; }
@media (max-width: 560px) {
  .committee .member { flex-wrap: wrap; }
  .committee .m-mail { flex-basis: 100%; padding-left: 4rem; }
}