/* Portfolio: monochrome Swiss-brutalist "field report".
   Visible structural grid, grain on paper, grotesque display with weight
   contrast, reversed label bars. Long-form reading stays in a serif. */

:root {
  --paper: #e9e9e4;
  --surface: #f3f3ef;
  --surface-inset: #e0e0da;
  --ink: #141414;
  --ink-soft: #4a4f54;
  --ink-faint: #83878c;
  --rule: #c9c9c2;
  --rule-strong: #b4b4ac;
  --break: #141414; /* broken paths render as ink, dashed */

  --display: "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --frame: 1120px;   /* width of the visible grid frame */
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* grain */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  mix-blend-mode: multiply;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
/* structural grid: two vertical rules bounding the frame */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--rule), var(--rule)) calc(50% - (var(--frame) / 2)) 0 / 1px 100% no-repeat,
    linear-gradient(var(--rule), var(--rule)) calc(50% + (var(--frame) / 2)) 0 / 1px 100% no-repeat;
}

.nav, main, .footer { position: relative; z-index: 1; }

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ---- Nav / masthead ---- */
.nav {
  border-bottom: 1px solid var(--rule);
  background: transparent;
}
.nav .wrap {
  max-width: var(--frame);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 40px;
  gap: 16px;
  flex-wrap: wrap;
}
.nav-logo {
  display: block;
  font-family: "Rouge Script", cursive;
  font-size: 42px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}
.nav-logo:hover { color: #000; }
.nav-name {
  font-family: var(--display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}
.nav-name .thin { font-weight: 500; }
.nav-name:hover { text-decoration: underline; text-underline-offset: 3px; }
.nav-links {
  display: flex;
  gap: 24px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.nav-links a { color: var(--ink-soft); text-decoration: none; }
.nav-links a:hover { color: var(--ink); }

/* ---- Cover hero (index) ---- */
.cover {
  max-width: var(--frame);
  margin: 0 auto;
  position: relative;
  padding: 76px 40px 60px;
  border-bottom: 1px solid var(--rule);
}
.cover-plumb {
  position: absolute;
  top: -1px;
  bottom: 40px;
  left: 40px;
  width: 2px;
  background: var(--ink);
}
.cover-lockup {
  display: flex;
  align-items: center;
  gap: clamp(20px, 4vw, 52px);
  flex-wrap: wrap;
  padding-left: 26px;
}
.cover-word {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(52px, 13vw, 140px);
  line-height: 0.86;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  margin: 0;
  color: var(--ink);
}
.cover-word .thin { font-weight: 300; letter-spacing: -0.02em; }
.cover-cross {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.5vw, 34px);
}
.xmark {
  font-family: var(--display);
  font-weight: 300;
  font-size: clamp(22px, 3vw, 34px);
  color: var(--ink);
}
.cover-name {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin: 0 0 8px;
}
.bar {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 5px 11px;
}
.cover-year {
  position: absolute;
  left: 40px;
  bottom: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
}

/* ---- Layout ---- */
/* Reading column left-aligns to the same grid gutter as the nav and hero,
   instead of centering a narrow column in the viewport. */
main.wrap {
  max-width: var(--frame);
  margin: 0 auto;
  padding: 72px 40px 104px;
}
main.wrap > * { max-width: 736px; }
section { margin: 0 0 68px; }

h1 {
  font-family: var(--display);
  font-weight: 760;
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  margin: 0 0 20px;
  color: var(--ink);
}
h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 58px 0 18px;
}

/* Defined, numbered section headers on case-study pages */
main.study { counter-reset: sec; }
main.study > h2 {
  counter-increment: sec;
  border-top: 1px solid var(--ink);
  margin-top: 76px;
  padding-top: 22px;
}
main.study > h2::before {
  content: counter(sec, decimal-leading-zero);
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: 12px;
}
h3 {
  font-family: var(--display);
  font-weight: 640;
  font-size: 17px;
  letter-spacing: -0.005em;
  margin: 28px 0 6px;
}

p { margin: 0 0 18px; max-width: 66ch; }

a { color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2.5px; }
a:hover { text-decoration-thickness: 2px; }

.lead {
  font-size: 21px;
  line-height: 1.62;
  color: var(--ink);
  margin-bottom: 22px;
}
.subhead {
  color: var(--ink-soft);
  max-width: 64ch;
  font-size: 19px;
}

/* eyebrow / kicker */
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.kicker::after {
  content: "";
  flex: 1 1 auto;
  max-width: 220px;
  height: 1px;
  background: var(--rule-strong);
}

/* ---- Case study cards ---- */
.cards { display: grid; gap: 0; margin-top: 8px; border-top: 1px solid var(--rule-strong); }
.card {
  display: block;
  border-bottom: 1px solid var(--rule);
  padding: 30px 4px 32px;
  text-decoration: none;
  color: var(--ink);
  transition: padding-left 0.18s ease;
}
.card:hover { padding-left: 16px; }
.card-tag {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}
.card:hover .card-tag { color: var(--ink); }
.card-title {
  font-family: var(--display);
  font-size: 27px;
  font-weight: 720;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 8px 0 12px;
}
.card p { color: var(--ink-soft); font-size: 17px; margin: 0 0 12px; max-width: 64ch; }
.card-go {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---- How I work ---- */
.principles { display: grid; gap: 0; margin-top: 8px; }
.principle {
  padding: 24px 0;
  border-top: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 4px 20px;
}
.principle:last-child { border-bottom: 1px solid var(--rule); }
.principle-n {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
  padding-top: 5px;
  letter-spacing: 0.04em;
}
.principle h3 { margin: 0 0 4px; grid-column: 2; }
.principle p { color: var(--ink-soft); margin: 0; font-size: 17px; grid-column: 2; }

/* ---- Case study intro / dek ---- */
.dek {
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 8px;
  max-width: 62ch;
}

/* ---- Report header (signature) ---- */
.report-header {
  border: 1px solid var(--ink);
  background: var(--surface);
  padding: 0;
  margin: 4px 0 34px;
  font-family: var(--mono);
  font-size: 12.5px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.report-header .field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 15px;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.report-header .field .k {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}
.report-header .field .v { color: var(--ink); }
.report-header .field .v.alert {
  background: var(--ink);
  color: var(--paper);
  padding: 1px 6px;
  align-self: flex-start;
}

/* ---- Section labels inside case studies ---- */
.section-label {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink);
  display: block;
  margin: 52px 0 2px;
}

/* ---- Console / mono panels ---- */
.term {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  background: var(--ink);
  color: #e9e9e4;
  border-radius: 0;
  padding: 15px 18px;
  margin: 22px 0;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.term .c { color: #83878c; }
.term .ok { color: #ffffff; font-weight: 600; }
.term .err { color: #ffffff; font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.term .p { color: #83878c; }
.term-cap {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin: -14px 0 24px;
}

code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: var(--surface-inset);
  border: 1px solid var(--rule-strong);
  padding: 1px 5px;
}

.callout {
  border: 1px solid var(--ink);
  border-left: 4px solid var(--ink);
  background: var(--surface);
  padding: 16px 20px;
  margin: 26px 0;
}
.callout p { margin: 0; }
.callout .callout-tag {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink);
  display: block;
  margin-bottom: 6px;
}

/* ---- Result figure ---- */
.result-figure {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0;
  margin: 26px 0;
  border: 1px solid var(--ink);
}
.stat {
  padding: 20px;
  border-right: 1px solid var(--rule);
  background: var(--surface);
}
.stat:last-child { border-right: none; }
.stat .n {
  font-family: var(--display);
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.stat .l {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-top: 8px;
}

/* ---- Diagrams (monochrome; broken = dashed) ---- */
.diagram {
  margin: 30px 0;
  border: 1px solid var(--ink);
  background: var(--surface);
  padding: 24px;
  overflow-x: auto;
}
.diagram svg { display: block; max-width: 100%; height: auto; margin: 0 auto; }
.diagram-cap {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin-top: 14px;
  text-align: center;
}
.svg-node { fill: var(--surface); stroke: var(--ink); stroke-width: 1.4; }
.svg-node-fail { fill: var(--surface); stroke: var(--ink); stroke-width: 1.4; stroke-dasharray: 4 3; }
.svg-label { fill: var(--ink); font-family: var(--mono); font-size: 12px; }
.svg-sub { fill: var(--ink-soft); font-family: var(--mono); font-size: 10.5px; }
.svg-flow { stroke: var(--ink); stroke-width: 1.4; fill: none; }
.svg-flow-fail { stroke: var(--ink); stroke-width: 1.6; fill: none; stroke-dasharray: 5 4; }
.svg-mark { fill: var(--ink); font-family: var(--mono); font-size: 15px; font-weight: bold; }

/* ---- Contact chips ---- */
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.chip {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid var(--ink);
  padding: 10px 15px;
  text-decoration: none;
  color: var(--ink);
  background: transparent;
  transition: background 0.15s ease, color 0.15s ease;
}
.chip:hover {
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}

/* ---- Back link ---- */
.back {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: inline-block;
  margin-bottom: 22px;
  color: var(--ink-soft);
  text-decoration: none;
}
.back:hover { color: var(--ink); }

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--ink);
  margin-top: 48px;
  background: transparent;
}
.footer .wrap {
  max-width: var(--frame);
  padding: 22px 40px 40px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: center;
}
.footer a { color: var(--ink-soft); text-decoration: none; }
.footer a:hover { color: var(--ink); }
.footer .sep { color: var(--rule-strong); }

/* ---- Magazine feature spread (prototype) ---- */
main.spread {
  max-width: var(--frame);
  margin: 0 auto;
  padding: 72px 40px 104px;
}
.spread-masthead { max-width: 838px; margin-bottom: 60px; }
.spread-masthead .report-header { margin: 24px 0 0; }

.feature {
  display: grid;
  grid-template-columns: 190px minmax(0, 600px);
  column-gap: 48px;
  max-width: 838px;
  border-top: 1px solid var(--ink);
  padding-top: 22px;
  margin: 0 0 60px;
}
.feature .fnum {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.feature .flabel {
  display: block;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.feature .pull {
  margin: 30px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.35;
  color: var(--ink);
}
.feature .body > :first-child { margin-top: 0; }
.feature .body p { max-width: none; }
.feature .body > :last-child { margin-bottom: 0; }
.feature.lead .body > p:first-of-type::first-letter {
  float: left;
  margin: 9px 12px 0 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: 3.5em;
  line-height: 0.68;
  color: var(--ink);
}

.spread .figure-wide { max-width: 838px; margin: 0 0 60px; }
.spread .figure-wide .diagram,
.spread .figure-wide .result-figure { margin: 0; }

@media (max-width: 820px) {
  main.spread { padding-left: 22px; padding-right: 22px; }
  .feature { grid-template-columns: 1fr; row-gap: 14px; margin-bottom: 44px; }
  .feature .pull { margin-top: 4px; }
}

/* ---- Index contents spread (two case studies side by side) ---- */
#case-studies { max-width: none; }
.contents {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--ink);
  margin-top: 8px;
}
.entry {
  display: block;
  padding: 30px 26px 32px 0;
  text-decoration: none;
  color: var(--ink);
}
.entry + .entry {
  border-left: 1px solid var(--rule);
  padding-left: 26px;
  padding-right: 0;
}
.entry-head {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-faint);
}
.entry-head .entry-num { color: var(--ink); }
.entry-title {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 720;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 12px 0 12px;
  line-height: 1.05;
}
.entry p { color: var(--ink-soft); font-size: 16px; margin: 0 0 16px; }
.entry:hover .entry-title { text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 900px) {
  .contents { grid-template-columns: 1fr; }
  .entry { padding: 26px 0 28px; }
  .entry + .entry { border-left: none; border-top: 1px solid var(--rule); padding-left: 0; }
}

/* ---- Focus + motion ---- */
a:focus-visible, .card:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* ---- Responsive ---- */
@media (max-width: 1180px) {
  body::after { display: none; } /* hide grid rules when frame exceeds viewport */
}
@media (max-width: 560px) {
  body { font-size: 17px; }
  main { padding: 44px 0 64px; }
  .nav .wrap, .cover, .footer .wrap { padding-left: 22px; padding-right: 22px; }
  .cover-plumb, .cover-year { left: 22px; }
  .cover-lockup { padding-left: 14px; }
  .stat { border-right: none; border-bottom: 1px solid var(--rule); }
  .stat:last-child { border-bottom: none; }
  .report-header .field { border-right: none; }
}