/* NU Product Development
   Paper, ink, one accent. Hairlines instead of boxes. No shadows, no gradients, no rounded cards. */

:root {
  --paper: #f3f1ec;
  --paper-2: #e9e6df;
  --paper-3: #d9d5cb;
  --ink: #141414;
  --ink-2: #4a4a48;
  --ink-3: #8a8883;
  --rule: #cdc8bd;
  --rule-dark: #33322f;
  --accent: #ff4a1c;
  --sans: "Hanken Grotesk", "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --gutter: clamp(20px, 4vw, 56px);
  --max: 1440px;
  --nav-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.5;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
figure { margin: 0; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
h1, h2, h3, h4 { margin: 0; font-weight: 300; letter-spacing: -0.02em; line-height: 1.05; }
ul, ol { margin: 0; padding: 0; list-style: none; }
dl { margin: 0; }
button, input, select, textarea { font: inherit; color: inherit; }
::selection { background: var(--ink); color: var(--paper); }

.wrap { width: min(100% - 2 * var(--gutter), var(--max)); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--paper); padding: 8px 12px; font-family: var(--mono); font-size: 12px; }
.skip:focus { left: 8px; z-index: 100; }

/* Type scale */
.display { font-size: clamp(2.75rem, 7.2vw, 6.25rem); line-height: 0.98; letter-spacing: -0.03em; font-weight: 300; }
.h1 { font-size: clamp(2.4rem, 5vw, 4.25rem); line-height: 1.02; letter-spacing: -0.025em; font-weight: 300; }
.h2 { font-size: clamp(1.9rem, 3.6vw, 3rem); line-height: 1.08; letter-spacing: -0.02em; font-weight: 300; }
.h3 { font-size: clamp(1.35rem, 2vw, 1.75rem); line-height: 1.2; letter-spacing: -0.015em; font-weight: 400; }
.lede { font-size: clamp(1.15rem, 1.6vw, 1.45rem); line-height: 1.4; font-weight: 300; max-width: 34em; }
.body-l { font-size: clamp(1.05rem, 1.3vw, 1.2rem); line-height: 1.5; max-width: 38em; }
.muted { color: var(--ink-2); }
.mono, .eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 400; }
.eyebrow { color: var(--ink-2); display: flex; gap: 14px; align-items: baseline; }
.eyebrow .n { color: var(--accent); }
.accent { color: var(--accent); }
.mark { display: inline-block; width: 0.42em; height: 0.42em; background: var(--accent); vertical-align: baseline; margin-left: 0.12em; }

/* Header */
.header { position: sticky; top: 0; z-index: 50; background: var(--paper); border-bottom: 1px solid transparent; transition: border-color .25s; }
.header.is-scrolled { border-bottom-color: var(--rule); }
.nav { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: baseline; gap: 12px; }
.brand .word { font-weight: 500; font-size: 22px; letter-spacing: -0.04em; line-height: 1; }
.brand .word::after { content: ""; display: inline-block; width: 6px; height: 6px; background: var(--accent); margin-left: 3px; }
.brand .sub { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); }
.menu { display: flex; gap: clamp(18px, 2.6vw, 40px); align-items: center; }
.menu a { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; padding: 6px 0; border-bottom: 1px solid transparent; }
.menu a:hover, .menu a[aria-current="page"] { border-bottom-color: currentColor; }
.menu .cta { border: 1px solid currentColor; padding: 10px 16px; }
.menu .cta:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.burger { display: none; background: none; border: 1px solid currentColor; padding: 9px 12px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; cursor: pointer; }
@media (max-width: 860px) {
  .menu { display: none; }
  .burger { display: inline-block; }
  .brand .sub { display: none; }
  body.menu-open .menu { display: flex; position: fixed; inset: var(--nav-h) 0 0 0; background: var(--paper); color: var(--ink); flex-direction: column; align-items: flex-start; padding: 32px var(--gutter); gap: 0; border-top: 1px solid var(--rule); z-index: 60; overflow: auto; }
  body.menu-open .menu a { font-family: var(--sans); font-size: clamp(2rem, 8vw, 3rem); letter-spacing: -0.02em; text-transform: none; font-weight: 300; padding: 14px 0; border-bottom: 1px solid var(--rule); width: 100%; }
  body.menu-open .menu .cta { border: 0; margin-top: 24px; padding: 14px 0; }
  body.menu-open { overflow: hidden; }
}

/* Buttons and links */
.btn { display: inline-flex; align-items: center; gap: 12px; padding: 14px 20px; border: 1px solid var(--ink); font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; line-height: 1; cursor: pointer; background: transparent; color: var(--ink); transition: background .15s, color .15s, border-color .15s; }
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.btn:disabled { opacity: .5; cursor: default; }
.btn .arr { transition: transform .2s; }
.btn:hover .arr { transform: translateX(4px); }
.dark .btn { border-color: var(--paper); color: var(--paper); }
.dark .btn:hover { background: var(--paper); color: var(--ink); }
.dark .btn.primary { background: var(--paper); color: var(--ink); }
.dark .btn.primary:hover { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.link { border-bottom: 1px solid currentColor; padding-bottom: 1px; }
.link:hover { color: var(--accent); }
.arrow-link { font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; display: inline-flex; gap: 10px; align-items: center; }
.arrow-link .arr { transition: transform .2s; }
.arrow-link:hover .arr { transform: translateX(4px); }

/* Sections */
.section { padding-block: clamp(64px, 9vw, 140px); }
.section.tight { padding-block: clamp(40px, 6vw, 88px); }
.section + .section { border-top: 1px solid var(--rule); }
.dark { background: var(--ink); color: var(--paper); }
.dark .muted { color: var(--paper-3); }
.dark .eyebrow { color: var(--paper-3); }
.dark + .section { border-top: 0; }
.tint { background: var(--paper-2); }
.section-head { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: clamp(36px, 5vw, 72px); align-items: start; }
@media (min-width: 900px) { .section-head { grid-template-columns: 5fr 7fr; gap: 40px; } .section-head.narrow { grid-template-columns: 4fr 8fr; } }
.section-head .h2 { max-width: 14em; }
.section-head .side { display: grid; gap: 20px; justify-items: start; }
.section-head .side p { color: var(--ink-2); max-width: 36em; }
.dark .section-head .side p { color: var(--paper-3); }

/* Grid helpers */
.grid { display: grid; gap: var(--gutter); }
.g-2 { grid-template-columns: 1fr; }
.g-3 { grid-template-columns: 1fr; }
.g-4 { grid-template-columns: 1fr 1fr; }
@media (min-width: 700px) { .g-2 { grid-template-columns: 1fr 1fr; } .g-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1000px) { .g-4 { grid-template-columns: repeat(4, 1fr); } }
.cols-12 { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--gutter); align-items: start; }
.col-4, .col-5, .col-6, .col-7, .col-8 { grid-column: span 12; }
@media (min-width: 900px) { .col-4 { grid-column: span 4; } .col-4.push { grid-column: 9 / span 4; } .col-5 { grid-column: span 5; } .col-6 { grid-column: span 6; } .col-7 { grid-column: span 7; } .col-8 { grid-column: span 8; } .off-1 { grid-column-start: 2; } }
.sticky { position: sticky; top: calc(var(--nav-h) + 24px); }

/* Hero */
.hero { padding-block: clamp(48px, 7vw, 112px) clamp(48px, 6vw, 96px); }
.hero-grid { display: grid; grid-template-columns: 1fr; gap: clamp(32px, 5vw, 64px); align-items: end; }
@media (min-width: 960px) { .hero-grid { grid-template-columns: 7fr 5fr; } }
.hero .eyebrow { margin-bottom: 28px; }
.hero .lede { margin-top: 32px; }
.hero .actions { margin-top: 40px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-photo img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; background: var(--paper-2); }
@media (max-width: 959px) { .hero-photo img { aspect-ratio: 3 / 2; } }
.caption { font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); margin-top: 10px; display: flex; justify-content: space-between; gap: 12px; }

/* Fact strip */
.facts { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); display: grid; grid-template-columns: 1fr 1fr; }
@media (min-width: 900px) { .facts { grid-template-columns: repeat(4, 1fr); } }
.facts > div { padding: 22px 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); line-height: 1.6; }
.facts > div + div { padding-left: 24px; border-left: 1px solid var(--rule); }
@media (max-width: 899px) { .facts > div:nth-child(3) { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); } .facts > div:nth-child(4) { border-top: 1px solid var(--rule); } }
.facts b { display: block; color: var(--ink); font-weight: 500; }

/* Index list (capabilities) */
.index { border-top: 1px solid var(--rule); }
.index-row { display: grid; grid-template-columns: 44px 1fr 32px; gap: 8px 16px; align-items: baseline; padding: 22px 0; border-bottom: 1px solid var(--rule); transition: padding-left .2s; }
@media (min-width: 900px) { .index-row { grid-template-columns: 64px 4fr 6fr 40px; padding: 26px 0; } }
.index-row .n { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.index-row .t { font-size: clamp(1.3rem, 2vw, 1.75rem); letter-spacing: -0.015em; font-weight: 300; }
.index-row .d { color: var(--ink-2); grid-column: 2; }
@media (min-width: 900px) { .index-row .d { grid-column: auto; } }
.index-row .arr { justify-self: end; color: var(--ink-3); transition: transform .2s, color .2s; grid-row: 1; grid-column: 3; }
@media (min-width: 900px) { .index-row .arr { grid-column: 4; } }
a.index-row:hover { padding-left: 8px; }
a.index-row:hover .arr { transform: translateX(4px); color: var(--accent); }

/* Work tiles */
.tiles { display: grid; grid-template-columns: 1fr; gap: clamp(28px, 4vw, 56px) var(--gutter); }
@media (min-width: 700px) { .tiles { grid-template-columns: 1fr 1fr; } }
.tile img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--paper-2); transition: opacity .25s; }
.tile:hover img { opacity: .9; }
.tile .meta { display: grid; grid-template-columns: 1fr auto; gap: 8px 16px; padding-top: 14px; border-top: 1px solid var(--ink); margin-top: 14px; align-items: baseline; }
.dark .tile .meta { border-top-color: var(--paper); }
.tile .name { font-size: clamp(1.2rem, 1.6vw, 1.5rem); letter-spacing: -0.015em; font-weight: 400; }
.tile .kind { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); text-align: right; }
.dark .tile .kind { color: var(--paper-3); }
.tile .blurb { grid-column: 1 / -1; color: var(--ink-2); max-width: 32em; }
.dark .tile .blurb { color: var(--paper-3); }
.tile.wide { grid-column: 1 / -1; }
.tile.wide img { aspect-ratio: 21 / 9; }

/* Phases */
.phases { display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--rule-dark); }
@media (min-width: 900px) { .phases { grid-template-columns: repeat(4, 1fr); } }
.phase { padding: 28px 0 36px; border-bottom: 1px solid var(--rule-dark); }
@media (min-width: 900px) { .phase { padding: 32px 28px 40px 0; border-bottom: 0; } .phase + .phase { border-left: 1px solid var(--rule-dark); padding-left: 28px; } }
.phase .n { font-family: var(--mono); font-size: 12px; color: var(--accent); letter-spacing: 0.08em; }
.phase h3 { font-size: clamp(1.5rem, 2.2vw, 2rem); margin: 16px 0 14px; font-weight: 300; }
.phase p { color: var(--paper-3); }
.phase ul { margin-top: 18px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--paper-3); line-height: 1.9; }
.phase ul li::before { content: "\2014  "; color: var(--ink-3); }

/* Sectors */
.sectors { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); }
@media (min-width: 900px) { .sectors { grid-template-columns: repeat(4, 1fr); } }
.sector img { width: 100%; aspect-ratio: 1; object-fit: cover; filter: saturate(.85); background: var(--paper-2); }
.sector .n { font-family: var(--mono); font-size: 11px; color: var(--accent); margin: 16px 0 6px; letter-spacing: 0.08em; }
.sector h3 { font-size: 1.25rem; font-weight: 400; letter-spacing: -0.01em; }
.sector p { color: var(--ink-2); font-size: 15px; margin-top: 8px; }

/* Principles */
.principles { border-top: 1px solid var(--rule); }
.principle { display: grid; grid-template-columns: 1fr; gap: 12px 40px; padding: 32px 0; border-bottom: 1px solid var(--rule); }
@media (min-width: 900px) { .principle { grid-template-columns: 80px 4fr 6fr; } }
.principle .n { font-family: var(--mono); font-size: 12px; color: var(--accent); padding-top: 8px; }
.principle h3 { font-size: clamp(1.4rem, 2.2vw, 2rem); font-weight: 300; }
.principle p { color: var(--ink-2); }

/* Statement */
.statement { font-size: clamp(1.7rem, 3.4vw, 3rem); font-weight: 300; letter-spacing: -0.02em; line-height: 1.15; max-width: 24em; }
.statement em { font-style: normal; color: var(--accent); }

/* CTA band */
.cta-band { display: grid; grid-template-columns: 1fr; gap: 32px; align-items: end; }
@media (min-width: 900px) { .cta-band { grid-template-columns: 7fr 5fr; } }
.cta-band .contacts { font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em; line-height: 2; color: var(--ink-2); }
.cta-band .contacts a:hover { color: var(--accent); }
.cta-band .actions { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }

/* Footer */
.footer { border-top: 1px solid var(--rule); padding: 56px 0 32px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px var(--gutter); }
@media (min-width: 900px) { .footer-grid { grid-template-columns: 4fr 2fr 3fr 3fr; } }
.footer .brand-col { grid-column: 1 / -1; }
@media (min-width: 900px) { .footer .brand-col { grid-column: auto; } }
.footer .brand-col p { color: var(--ink-2); max-width: 26em; margin-top: 16px; }
.footer h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 14px; font-weight: 400; }
.footer li { padding: 4px 0; }
.footer li a:hover { color: var(--accent); }
.footer address { font-style: normal; color: var(--ink-2); line-height: 1.7; }
.footer .legal { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--rule); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); }

/* Page hero (interior) */
.page-hero { padding-block: clamp(48px, 7vw, 112px) clamp(40px, 5vw, 80px); }
.page-hero .eyebrow { margin-bottom: 24px; }
.page-hero .lede { margin-top: 28px; }

/* Service blocks */
.service { display: grid; grid-template-columns: 1fr; gap: 20px 40px; padding: clamp(40px, 5vw, 72px) 0; border-top: 1px solid var(--rule); scroll-margin-top: calc(var(--nav-h) + 16px); }
@media (min-width: 900px) { .service { grid-template-columns: 80px 4fr 7fr; } }
.service .n { font-family: var(--mono); font-size: 12px; color: var(--accent); padding-top: 10px; }
.service h2 { font-size: clamp(1.6rem, 2.6vw, 2.4rem); font-weight: 300; }
.service .body p { color: var(--ink-2); }
.service .list { margin-top: 20px; display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--rule); }
@media (min-width: 700px) { .service .list { grid-template-columns: 1fr 1fr; } }
.service .list li { padding: 10px 0; border-bottom: 1px solid var(--rule); font-size: 15px; }
@media (min-width: 700px) { .service .list li:nth-child(odd) { padding-right: 20px; } .service .list li:nth-child(even) { padding-left: 20px; border-left: 1px solid var(--rule); } }

/* Case study */
.case-facts { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
@media (min-width: 900px) { .case-facts { grid-template-columns: repeat(5, 1fr); } }
.case-facts > div { padding: 18px 0; }
.case-facts > div + div { padding-left: 20px; border-left: 1px solid var(--rule); }
@media (max-width: 899px) { .case-facts > div:nth-child(2n+1) { border-left: 0; padding-left: 0; } .case-facts > div:nth-child(n+3) { border-top: 1px solid var(--rule); } }
.case-facts dt { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 6px; }
.case-facts dd { margin: 0; font-size: 15px; }
.case-photo img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; background: var(--paper-2); }
.prose { max-width: 40em; }
.prose h2 { font-size: clamp(1.5rem, 2.4vw, 2.1rem); font-weight: 300; margin: 0 0 20px; }
.prose p { color: var(--ink-2); font-size: clamp(1rem, 1.2vw, 1.125rem); }
.prose ul { border-top: 1px solid var(--rule); }
.prose ul li { padding: 14px 0; border-bottom: 1px solid var(--rule); display: grid; grid-template-columns: 24px 1fr; gap: 12px; color: var(--ink-2); }
.prose ul li::before { content: "\2014"; color: var(--accent); }
.outcomes { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gutter); border-top: 1px solid var(--rule); padding-top: 28px; }
@media (min-width: 900px) { .outcomes { grid-template-columns: repeat(3, 1fr); } }
.outcomes .big { font-size: clamp(2.4rem, 4.5vw, 4rem); font-weight: 300; letter-spacing: -0.03em; line-height: 1; }
.outcomes .lbl { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); margin-top: 10px; }
.next-case { border-top: 1px solid var(--rule); padding: 40px 0 0; display: flex; justify-content: space-between; align-items: baseline; gap: 20px; flex-wrap: wrap; }

/* Forms */
.form { display: grid; grid-template-columns: 1fr; gap: 28px; }
@media (min-width: 700px) { .form { grid-template-columns: 1fr 1fr; } .form .full { grid-column: 1 / -1; } }
.field label { display: block; font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); margin-bottom: 8px; }
.field input, .field select, .field textarea { width: 100%; background: transparent; border: 0; border-bottom: 1px solid var(--ink); padding: 10px 0 12px; border-radius: 0; outline: none; font-size: 17px; }
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-bottom-color: var(--accent); }
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink) 50%), linear-gradient(135deg, var(--ink) 50%, transparent 50%); background-position: calc(100% - 12px) 50%, calc(100% - 6px) 50%; background-size: 6px 6px; background-repeat: no-repeat; }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }
.form-note { font-size: 14px; color: var(--ink-2); }
.form-status { font-family: var(--mono); font-size: 13px; letter-spacing: 0.04em; min-height: 1.5em; }
.form-status.ok { color: var(--ink); }
.form-status.err { color: var(--accent); }
.form-foot { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.steps { border-top: 1px solid var(--rule); }
.steps li { display: grid; grid-template-columns: 40px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--rule); font-size: 15px; color: var(--ink-2); }
.steps li b { display: block; color: var(--ink); font-weight: 500; margin-bottom: 4px; }
.steps .n { font-family: var(--mono); font-size: 12px; color: var(--accent); padding-top: 3px; }

/* Team */
.team { border-top: 1px solid var(--rule); }
.team li { display: grid; grid-template-columns: 1fr; gap: 6px 40px; padding: 20px 0; border-bottom: 1px solid var(--rule); }
@media (min-width: 700px) { .team li { grid-template-columns: 3fr 3fr 6fr; } }
.team .role { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); padding-top: 4px; }
.team .what { color: var(--ink-2); font-size: 15px; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* Photo treatment */
.photo img { width: 100%; object-fit: cover; background: var(--paper-2); }
.photo.r-3-2 img { aspect-ratio: 3 / 2; }
.photo.r-4-5 img { aspect-ratio: 4 / 5; }
.photo.r-1-1 img { aspect-ratio: 1; }
.photo.r-16-9 img { aspect-ratio: 16 / 9; }
.photo.r-4-3 img { aspect-ratio: 4 / 3; }

/* 404 */
.notfound { min-height: 60vh; display: grid; align-content: center; }