/* IDMSI — shared stylesheet (v2)
   Design language: white canvas with #f4f4f4 alternating bands, near-black text,
   one signal-teal accent, square hairline tiles, IBM Plex Sans light for display.
   Plex Mono carries the wordmark, eyebrows and readout figures. No JavaScript. */

:root {
  --bg: #ffffff;
  --bg-alt: #f4f4f4;
  --ink: #161616;
  --text-2: #525252;
  --text-3: #8d8d8d;
  --border: #e0e0e0;
  --border-strong: #161616;
  --accent: #007d8a;
  --accent-hover: #005f6b;
  --accent-soft: #e0f2f4;
  --dark: #161616;
  --dark-text: #f4f4f4;
  --dark-muted: #a8a8a8;
  --dark-line: rgba(255, 255, 255, 0.25);
  --up: #42be65;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { margin: 0 0 0.5em; font-weight: 300; line-height: 1.15; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.4rem, 5.2vw, 4rem); line-height: 1.08; }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.5rem); }
h3 { font-size: 1.25rem; font-weight: 600; letter-spacing: 0; }

p { margin: 0 0 1em; }
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; }

.mono, .eyebrow, .chip, .readout, .wordmark, .cred, .tile .eyebrow {
  font-family: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;
}

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* ---------- header ---------- */

.site-header { background: var(--bg); border-bottom: 1px solid var(--border); }

.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px 24px; height: auto; padding-top: 14px; padding-bottom: 14px;
}

.wordmark { font-size: 1rem; font-weight: 600; letter-spacing: 0.24em; color: var(--ink); text-decoration: none; white-space: nowrap; }
.wordmark span {
  font-family: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  font-weight: 300; letter-spacing: 0.02em; color: var(--ink); margin-left: 0.55em;
}

.site-nav { display: flex; flex-wrap: wrap; gap: 4px 28px; }
.site-nav a { color: var(--text-2); text-decoration: none; font-size: 0.9rem; padding: 6px 0; border-bottom: 2px solid transparent; }
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

/* ---------- shared ---------- */

.eyebrow { font-size: 0.75rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin: 0 0 16px; }

section { padding: 80px 0; }
section.alt { background: var(--bg-alt); }
section + section:not(.alt):not(.hero-dark) { border-top: 1px solid var(--border); }

.lede { font-size: 1.2rem; font-weight: 300; color: var(--text-2); max-width: 40em; line-height: 1.5; }
.section-intro { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 32px 64px; align-items: start; margin-bottom: 40px; }
.section-intro h2 { margin: 0; }
.section-intro > p { margin: 0; color: var(--text-2); }
.section-intro .prose p { margin: 0 0 1em; }
.section-intro .prose p:last-child { margin-bottom: 0; }

/* buttons: IBM-style rectangles with an arrow */
.btn {
  display: inline-flex; align-items: center; justify-content: space-between; gap: 32px;
  min-width: 220px; padding: 14px 16px 14px 20px;
  background: var(--accent); color: #fff; text-decoration: none;
  font-size: 0.95rem; font-weight: 400; border: 1px solid var(--accent);
}
.btn::after { content: "\2192"; font-size: 1.05rem; transition: transform 120ms ease; }
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn:hover::after { transform: translateX(4px); }
.btn.secondary { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn.secondary:hover { background: var(--ink); color: #fff; }
.hero-dark .btn.secondary { color: #fff; border-color: #fff; }
.hero-dark .btn.secondary:hover { background: #fff; color: var(--ink); }

a:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

/* ---------- heroes ---------- */

.hero { padding: 88px 0 72px; }
.hero .lede { margin-top: 20px; }

.hero-dark { background: var(--dark); color: var(--dark-text); padding: 96px 0 88px; }
.hero-dark .lede { color: var(--dark-muted); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 64px; align-items: center; }

.cred { margin-top: 40px; font-size: 0.78rem; letter-spacing: 0.06em; line-height: 1.9; color: var(--dark-muted); }
.cred b { color: var(--dark-text); font-weight: 600; }

/* ---------- readout: the signature element ---------- */

.readout {
  border: 1px solid var(--dark-line); padding: 24px; font-size: 0.86rem; line-height: 1.5; color: var(--dark-text);
}
.readout .r-title { color: var(--dark-muted); letter-spacing: 0.14em; text-transform: uppercase; font-size: 0.7rem; margin-bottom: 12px; }
.readout .row { display: flex; justify-content: space-between; gap: 16px; padding: 9px 0; border-top: 1px solid var(--dark-line); }
.readout .row:first-of-type { border-top: 0; }
.readout .label { color: var(--dark-muted); }
.readout .value { text-align: right; white-space: nowrap; }
.readout .value .up { color: var(--up); }
.readout .footnote { margin-top: 14px; color: var(--dark-muted); font-size: 0.7rem; }

.chip { display: inline-block; font-size: 0.68rem; letter-spacing: 0.1em; padding: 2px 8px; background: var(--accent); color: #fff; vertical-align: 1px; }

/* light variant (case studies) */
.readout.light { border-color: var(--border); background: var(--bg); color: var(--ink); }
.readout.light .r-title { color: var(--accent); }
.readout.light .row { border-top-color: var(--border); }
.readout.light .label, .readout.light .footnote { color: var(--text-2); }
.readout.light .value .up { color: var(--accent); }
.tile.readout { border: 0; font-size: 0.84rem; }

/* ---------- tiles ---------- */

.tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); }
.tiles.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tiles.cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }

.tile {
  background: var(--bg); padding: 28px 24px 24px; display: flex; flex-direction: column; min-height: 240px;
  color: inherit; text-decoration: none; position: relative;
}
section.alt .tile { background: var(--bg); }
.tile .eyebrow { margin-bottom: 20px; }
.tile h3 { margin-bottom: 10px; }
.tile p { color: var(--text-2); font-size: 0.95rem; margin: 0; }
.tile p + p:not(.deliverable):not(.names) { margin-top: 0.8em; }
.tile .deliverable { margin-top: auto; padding-top: 18px; font-size: 0.86rem; color: var(--ink); }
.tile .deliverable strong { color: var(--accent); font-weight: 600; }
.tile .names { margin-top: auto; padding-top: 18px; font-family: "IBM Plex Mono", Menlo, monospace; font-size: 0.74rem; line-height: 1.7; color: var(--ink); }
.tile .arrow { margin-top: auto; padding-top: 24px; color: var(--accent); font-size: 1.2rem; align-self: flex-end; transition: transform 120ms ease; }
a.tile:hover { outline: 1px solid var(--ink); outline-offset: -1px; z-index: 1; }
a.tile:hover .arrow { transform: translateX(4px); }
.tiles.aligned .tile { display: grid; grid-row: span 4; grid-template-rows: subgrid; row-gap: 0; align-content: start; }
.tiles.aligned .tile .deliverable { margin-top: 0; }

/* ---------- prose ---------- */

.prose { max-width: 42em; }
.prose h2 { margin-top: 1.6em; }
.prose h2:first-child { margin-top: 0; }
.prose p { color: var(--text-2); }
.prose p strong { color: var(--ink); }

/* ---------- policy page ---------- */

.policy-meta { margin-top: 24px; font-family: "IBM Plex Mono", Menlo, monospace; font-size: 0.78rem; color: var(--text-2); }
.policy-grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); gap: 32px 64px; align-items: start; }
.policy-toc { position: sticky; top: 24px; display: flex; flex-direction: column; gap: 6px; }
.policy-toc a { color: var(--text-2); text-decoration: none; font-size: 0.95rem; padding: 4px 0; border-left: 2px solid transparent; padding-left: 12px; margin-left: -14px; }
.policy-toc a:hover { color: var(--ink); border-left-color: var(--accent); }
.policy h2 { margin-top: 0; padding-top: 8px; }
.policy h2 + h3 { margin-top: 1.2em; }
.policy h2:not(:first-child) { margin-top: 2.2em; padding-top: 40px; border-top: 1px solid var(--border); }
.policy h3 { margin-top: 1.6em; font-size: 1.05rem; }
.policy ul { padding-left: 1.2em; color: var(--text-2); }
.policy li { margin-bottom: 0.5em; }
.policy code { font-family: "IBM Plex Mono", Menlo, monospace; font-size: 0.9em; background: var(--bg); padding: 1px 5px; border: 1px solid var(--border); }
.policy em { color: var(--ink); }

/* ---------- insights: article (layout A) and listing ---------- */

.art-hero { padding-bottom: 40px; }
.art-head { max-width: 60rem; }
.art-head .eyebrow a { color: inherit; text-decoration: none; }
.art-meta { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 28px; font-family: "IBM Plex Mono", Menlo, monospace; font-size: 0.78rem; color: var(--text-2); letter-spacing: 0.04em; }
.art-meta b { color: var(--ink); font-weight: 600; }
.standfirst { font-size: 1.25rem; font-weight: 300; color: var(--text-2); line-height: 1.5; max-width: 38em; margin: 0; }
.art-main { padding-top: 0; }
.art-figure { margin: 0; }
.art-figure svg, .art-figure img { display: block; width: 100%; height: auto; }
.art-figure figcaption { font-family: "IBM Plex Mono", Menlo, monospace; font-size: 0.72rem; color: var(--text-2); padding: 10px 0 0; }
.art-grid { display: grid; grid-template-columns: minmax(0, 8fr) minmax(0, 3fr); gap: 48px 80px; align-items: start; margin-top: 56px; }
.art-body { max-width: 66ch; font-size: 1.08rem; line-height: 1.7; }
.art-body p { margin: 0 0 1.3em; }
.art-body h2 { font-size: 1.6rem; margin: 1.8em 0 0.6em; }
.art-body h2:first-child { margin-top: 0; }
.art-body ul { padding-left: 1.2em; }
.art-body li { margin-bottom: 0.5em; }
.pull { margin: 2em 0; padding: 4px 0 4px 24px; border-left: 3px solid var(--accent); font-size: 1.4rem; font-weight: 300; line-height: 1.35; color: var(--ink); }
.takeaways { border: 1px solid var(--border); background: var(--bg); padding: 20px; font-family: "IBM Plex Mono", Menlo, monospace; font-size: 0.86rem; }
.takeaways .r-title { color: var(--accent); letter-spacing: 0.14em; text-transform: uppercase; font-size: 0.7rem; margin-bottom: 12px; }
.takeaways ol { margin: 0; padding-left: 1.4em; }
.takeaways li { margin-bottom: 8px; line-height: 1.5; }
.art-side { position: sticky; top: 24px; display: flex; flex-direction: column; gap: 28px; }
.share { display: flex; flex-direction: column; gap: 6px; font-size: 0.9rem; }
.share .eyebrow { margin-bottom: 8px; }
.share a { color: var(--text-2); text-decoration: none; }
.share a:hover { color: var(--accent); }
.author { display: flex; gap: 20px; align-items: flex-start; border-top: 1px solid var(--border); padding-top: 28px; margin-top: 48px; }
.author .avatar { width: 64px; height: 64px; flex: 0 0 64px; background: var(--dark); color: var(--dark-text); font-family: "IBM Plex Mono", Menlo, monospace; font-weight: 600; display: flex; align-items: center; justify-content: center; letter-spacing: 0.1em; }
.author p { margin: 0; color: var(--text-2); font-size: 0.95rem; }
.author b { color: var(--ink); display: block; margin-bottom: 4px; }
.more-tiles .tile { min-height: 200px; }
.tile-art { padding-top: 0; }
.tile-art .thumb { margin: 0 -24px 22px; aspect-ratio: 16 / 9; overflow: hidden; border-bottom: 1px solid var(--border); }
.tile-art .thumb svg, .tile-art .thumb img { display: block; width: 100%; height: 100%; object-fit: cover; }
.more-tiles .tile .eyebrow { margin-bottom: 12px; }

.featured { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 0; border: 1px solid var(--border); background: var(--bg); color: inherit; text-decoration: none; }
.featured-img svg, .featured-img img { display: block; width: 100%; height: 100%; object-fit: cover; }
.featured-text { padding: 40px 40px 32px; display: flex; flex-direction: column; }
.featured-text h2 { margin-bottom: 14px; }
.featured-text .art-meta { margin-top: 20px; }
.featured-text .arrow { margin-top: auto; padding-top: 24px; color: var(--accent); font-size: 1.2rem; align-self: flex-end; transition: transform 120ms ease; }
.featured:hover { outline: 1px solid var(--ink); outline-offset: -1px; }
.featured:hover .arrow { transform: translateX(4px); }

/* ---------- CTA band ---------- */

.cta-band { background: var(--bg-alt); }
.cta-band .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.cta-band h2 { margin: 0; }

/* ---------- contact ---------- */

.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; }
.contact-list { list-style: none; padding: 0; margin: 0 0 32px; }
.contact-list li { padding: 14px 0; border-bottom: 1px solid var(--border); }
.contact-list .k { display: block; font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-2); margin-bottom: 2px; }

form label { display: block; font-weight: 600; margin: 18px 0 6px; font-size: 0.9rem; }
form input, form textarea { width: 100%; padding: 12px; border: 0; border-bottom: 1px solid var(--ink); background: var(--bg-alt); font: inherit; color: var(--ink); }
form input:focus, form textarea:focus { outline: 2px solid var(--accent); outline-offset: -2px; }
form button { margin-top: 20px; cursor: pointer; }

/* ---------- footer ---------- */

.site-footer { border-top: 1px solid var(--border); padding: 40px 0 56px; color: var(--text-2); font-size: 0.85rem; }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.site-footer .locations { font-size: 0.78rem; letter-spacing: 0.06em; color: var(--text-2); }
.site-footer .footer-links { display: flex; gap: 20px; }

/* ---------- responsive ---------- */

@media (max-width: 1024px) {
  .tiles.cols-5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .wrap { padding: 0 20px; }
  section { padding: 56px 0; }
  .hero { padding: 56px 0 48px; }
  .hero-dark { padding: 64px 0 56px; }
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .section-intro { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .tiles, .tiles.cols-2, .tiles.cols-5 { grid-template-columns: minmax(0, 1fr); }
  .tile { min-height: 0; }
  .contact-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .policy-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .policy-toc { position: static; }
  .art-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; margin-top: 32px; }
  .art-side { position: static; }
  .pull { font-size: 1.2rem; }
  .featured { grid-template-columns: minmax(0, 1fr); }
  .featured-text { padding: 24px 20px; }
  .readout .row { flex-wrap: wrap; }
  .readout .value { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
  .btn::after, .tile .arrow { transition: none; }
}