/* Stack Lab — performance lab editorial */

:root {
  --paper: #f5f1eb;
  --paper-2: #ece6dc;
  --paper-3: #e0d8ca;
  --ink: #1a1818;
  --ink-2: #3d3937;
  --ink-3: #6b635c;
  --rule: #1a1818;
  --accent: #d6322a;
  --accent-soft: #ecd2cd;
  --green: #1f5d3c;
  --gutter: clamp(20px, 4vw, 56px);
  --max: 1400px;
  --serif: "Fraunces", "Times New Roman", serif;
  --sans: "Public Sans", -apple-system, system-ui, sans-serif;
  --mono: "IBM Plex Mono", "Courier New", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 17px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  font-weight: 400;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "ss02", "kern";
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.1, 0 0 0 0 0.1, 0 0 0 0 0.1, 0 0 0 0.4 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/></svg>");
  opacity: 0.06;
  pointer-events: none;
  mix-blend-mode: multiply;
  z-index: 1;
}

a { color: inherit; text-decoration: none; }

img, svg { display: block; max-width: 100%; }

.wrap { max-width: var(--max); margin: 0 auto; padding-inline: var(--gutter); position: relative; z-index: 2; }

/* ────── TOPBAR ────── */
.topbar {
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
  position: relative;
  z-index: 10;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 32px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.topbar-meta {
  display: flex;
  gap: 24px;
  text-transform: uppercase;
  color: var(--ink-3);
}
.topbar-meta .dot { color: var(--accent); }
.topbar-cta {
  text-transform: uppercase;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
}

/* ────── MASTHEAD ────── */
.masthead {
  border-bottom: 4px double var(--ink);
  padding: 22px 0 18px;
}
.masthead-inner { display: flex; align-items: end; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(40px, 8vw, 96px);
  line-height: 0.85;
  letter-spacing: -0.04em;
}
.brand em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}
.brand-sub {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-3);
  margin-top: 6px;
}
.nav { display: flex; gap: 26px; font-family: var(--mono); font-size: 13px; flex-wrap: wrap; }
.nav a {
  text-transform: lowercase;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.15s;
}
.nav a:hover, .nav a[aria-current] { border-bottom-color: var(--accent); }

/* ────── HERO ────── */
.hero {
  padding: clamp(40px, 8vw, 110px) 0 clamp(60px, 9vw, 130px);
  border-bottom: 1px solid var(--ink);
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 60px;
  align-items: end;
}
@media (max-width: 900px) { .hero-grid { grid-template-columns: 1fr; gap: 36px; } }

.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
  display: flex;
  gap: 12px;
  align-items: center;
}
.kicker::before {
  content: "";
  width: 36px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(48px, 10vw, 168px);
  line-height: 0.86;
  letter-spacing: -0.045em;
}
.hero h1 em {
  font-style: italic;
  font-weight: 300;
  font-variation-settings: "SOFT" 100, "WONK" 1;
}
.hero h1 .stroke {
  -webkit-text-stroke: 1.5px var(--ink);
  color: transparent;
}

.hero-aside {
  border-left: 1px solid var(--ink);
  padding: 8px 0 8px 28px;
  font-size: 16px;
  line-height: 1.6;
}
.hero-aside p + p { margin-top: 16px; }
.hero-aside .num {
  font-family: var(--serif);
  font-style: italic;
  font-size: 60px;
  line-height: 1;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}

.hero-meta {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--ink);
  padding-top: 14px;
  margin-top: 60px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  flex-wrap: wrap;
  gap: 12px;
}

/* ────── SECTION HEADERS ────── */
.section { padding: clamp(60px, 9vw, 130px) 0; border-bottom: 1px solid var(--ink); }

.section-head {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 32px;
  margin-bottom: clamp(32px, 5vw, 70px);
  align-items: start;
}
@media (max-width: 700px) { .section-head { grid-template-columns: 1fr; gap: 12px; } }
.section-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.1em;
  padding-top: 10px;
}
.section-title {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1;
  letter-spacing: -0.025em;
  max-width: 18ch;
}
.section-title em { font-style: italic; color: var(--accent); }
.section-lead {
  font-size: 19px;
  line-height: 1.55;
  max-width: 56ch;
  margin-top: 18px;
  color: var(--ink-2);
}

/* ────── MANIFEST ────── */
.manifest-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 5vw, 80px);
  font-size: 18px;
  line-height: 1.6;
}
@media (max-width: 800px) { .manifest-grid { grid-template-columns: 1fr; } }
.manifest-grid p + p { margin-top: 16px; }
.dropcap::first-letter {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 4.6em;
  float: left;
  line-height: 0.84;
  margin: 8px 10px 0 0;
  color: var(--accent);
}

.pullquote {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.15;
  border-block: 1px solid var(--ink);
  padding: 36px 0;
  margin: 60px 0;
  letter-spacing: -0.02em;
}
.pullquote::before { content: "«"; color: var(--accent); }
.pullquote::after { content: "»"; color: var(--accent); }

/* ────── SERVICES TABLE ────── */
.svc-table {
  border-top: 1px solid var(--ink);
}
.svc-row {
  display: grid;
  grid-template-columns: 60px 1fr 280px 200px;
  gap: 32px;
  padding: 28px 0;
  border-bottom: 1px solid var(--ink);
  align-items: baseline;
}
@media (max-width: 880px) {
  .svc-row { grid-template-columns: 40px 1fr; }
  .svc-row .svc-meta-2, .svc-row .svc-meta-3 { grid-column: 2; padding-top: 8px; font-size: 14px; }
}
.svc-row:hover { background: var(--paper-2); }
.svc-row:hover .svc-name em { color: var(--accent); }
.svc-num { font-family: var(--mono); font-size: 13px; color: var(--ink-3); letter-spacing: 0.05em; }
.svc-name {
  font-family: var(--serif);
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 500;
  letter-spacing: -0.01em;
}
.svc-name em { font-style: italic; transition: color 0.2s; }
.svc-name + .svc-desc {
  font-size: 14px;
  color: var(--ink-2);
  margin-top: 8px;
  line-height: 1.5;
}
.svc-meta-2, .svc-meta-3 {
  font-family: var(--mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-2);
}

/* ────── CASES ────── */
.cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
.case {
  display: grid;
  grid-template-columns: 220px 1fr 320px;
  gap: 48px;
  padding: 44px 0;
  border-top: 1px solid var(--ink);
  align-items: start;
}
.case:last-child { border-bottom: 1px solid var(--ink); }
@media (max-width: 950px) {
  .case { grid-template-columns: 1fr; gap: 18px; padding: 32px 0; }
}
.case-meta {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  line-height: 1.7;
}
.case-meta strong { color: var(--ink); display: block; font-weight: 600; margin-bottom: 4px; }
.case-meta div + div { margin-top: 12px; }
.case-body h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.case-body h3 em { font-style: italic; color: var(--accent); }
.case-body p { font-size: 17px; line-height: 1.55; color: var(--ink-2); }
.case-body p + p { margin-top: 10px; }
.case-stat {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(56px, 8vw, 110px);
  line-height: 0.9;
  letter-spacing: -0.04em;
  text-align: right;
  color: var(--accent);
}
.case-stat small {
  display: block;
  font-family: var(--mono);
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-top: 8px;
}
@media (max-width: 950px) { .case-stat { text-align: left; } }

/* ────── METHOD ────── */
.method-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 12px;
}
@media (max-width: 1000px) { .method-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 580px) { .method-grid { grid-template-columns: 1fr; } }
.method {
  border-top: 2px solid var(--ink);
  padding-top: 20px;
}
.method-num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 14px;
}
.method-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  line-height: 1.1;
  margin-bottom: 10px;
}
.method-text {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.55;
}

/* ────── TEAM ────── */
.team-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid var(--ink);
}
@media (max-width: 900px) { .team-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .team-grid { grid-template-columns: 1fr; } }
.member {
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  padding: 24px;
  position: relative;
  background: var(--paper);
}
.member:last-child { border-right: none; }
@media (max-width: 900px) { .member:nth-child(even) { border-right: none; } }
.member-avatar {
  width: 52px;
  height: 52px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  margin-bottom: 18px;
  background: var(--paper-2);
}
.member-avatar.accent { background: var(--accent); color: var(--paper); border-color: var(--accent); }
.member-name {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}
.member-role {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
}
.member-tag {
  position: absolute;
  top: 18px;
  right: 18px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--ink-3);
}

/* ────── FAQ ────── */
.faq-list { border-top: 1px solid var(--ink); }
.faq-item {
  border-bottom: 1px solid var(--ink);
  padding: 22px 0;
  cursor: pointer;
  position: relative;
}
.faq-q {
  font-family: var(--serif);
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 500;
  line-height: 1.2;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: baseline;
}
.faq-q::after {
  content: "+";
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 400;
  color: var(--accent);
  transition: transform 0.2s;
  flex-shrink: 0;
}
.faq-item.open .faq-q::after { content: "−"; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-2);
  padding: 0 60px 0 0;
}
.faq-item.open .faq-a { max-height: 600px; padding-top: 16px; }

/* ────── CTA ────── */
.cta {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(60px, 9vw, 130px) 0;
  border-bottom: 1px solid var(--ink);
}
.cta::before { display: none; }
.cta h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 88px);
  line-height: 0.95;
  letter-spacing: -0.035em;
  max-width: 18ch;
}
.cta h2 em { font-style: italic; color: var(--accent-soft); }
.cta-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: end;
  margin-top: 60px;
}
@media (max-width: 900px) { .cta-grid { grid-template-columns: 1fr; } }
.cta-aside { font-family: var(--mono); font-size: 14px; line-height: 1.7; color: var(--paper-3); }
.cta-aside a { color: var(--paper); border-bottom: 1px solid var(--paper-3); }
.cta-aside a:hover { border-bottom-color: var(--accent); }
.cta-button-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 26px;
  background: var(--accent);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: 1px solid var(--accent);
  transition: background 0.15s, transform 0.15s;
}
.btn:hover { background: transparent; }
.btn-ghost { background: transparent; color: var(--paper); border-color: var(--paper-3); }
.btn-ghost:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }

/* ────── FOOTER ────── */
.foot {
  background: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  padding: 42px 0 32px;
  letter-spacing: 0.04em;
}
.foot-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 28px;
}
@media (max-width: 800px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .foot-grid { grid-template-columns: 1fr; } }
.foot h4 {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--ink);
  letter-spacing: 0.12em;
  margin-bottom: 14px;
  font-weight: 600;
}
.foot a {
  display: block;
  margin-bottom: 6px;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  width: fit-content;
}
.foot a:hover { border-bottom-color: var(--accent); color: var(--ink); }
.foot-bottom {
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid var(--ink);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

/* ────── Subpage helpers ────── */
.page-head { padding: clamp(60px, 9vw, 120px) 0 clamp(40px, 6vw, 80px); border-bottom: 1px solid var(--ink); }
.page-head h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(48px, 8vw, 130px);
  line-height: 0.88;
  letter-spacing: -0.04em;
}
.page-head h1 em { font-style: italic; color: var(--accent); }
.page-head p { max-width: 50ch; font-size: 19px; margin-top: 28px; line-height: 1.55; color: var(--ink-2); }

.prose { max-width: 68ch; font-size: 17px; line-height: 1.65; }
.prose h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(26px, 3vw, 38px);
  letter-spacing: -0.02em;
  margin: 50px 0 16px;
  line-height: 1.1;
}
.prose h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  margin: 32px 0 10px;
  letter-spacing: -0.01em;
}
.prose p + p { margin-top: 14px; }
.prose ul { margin: 14px 0 14px 24px; }
.prose li { margin-bottom: 6px; }
.prose strong { font-weight: 600; }

/* ────── Mobile menu ────── */
.menu-toggle { display: none; background: none; border: 1px solid var(--ink); padding: 6px 12px; font-family: var(--mono); font-size: 12px; cursor: pointer; }
@media (max-width: 720px) {
  .menu-toggle { display: block; }
  .nav { display: none; width: 100%; flex-direction: column; gap: 14px; padding: 20px 0; border-top: 1px solid var(--ink); margin-top: 14px; }
  .nav.open { display: flex; }
}

/* ────── COOKIE BANNER ────── */
.cookie-banner {
  position: fixed;
  bottom: 18px;
  left: 18px;
  right: 18px;
  max-width: 720px;
  margin-inline: auto;
  background: var(--paper);
  border: 1.5px solid var(--ink);
  padding: 18px 22px;
  z-index: 100;
  box-shadow: 6px 6px 0 var(--ink);
  display: flex;
  gap: 18px;
  align-items: center;
  animation: cb-up 0.4s ease;
}
.cookie-banner__inner { display: contents; }
.cookie-banner__text {
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-2);
  margin: 0;
  flex: 1;
}
.cookie-banner__text a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}
.cookie-banner__btn {
  background: var(--accent);
  color: var(--paper);
  border: 1.5px solid var(--accent);
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}
.cookie-banner__btn:hover { background: var(--paper); color: var(--accent); }
.cookie-banner.is-hidden { opacity: 0; transform: translateY(20px); transition: all 0.3s; }
@keyframes cb-up { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 600px) {
  .cookie-banner { flex-direction: column; align-items: stretch; gap: 12px; padding: 14px 18px; }
  .cookie-banner__btn { align-self: flex-start; }
}