/* ============================================================
   Portfolio — black & white, two accent colors doing all the talking
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-raise: #f2f2f2;
  --bg-card: #fafafa;
  --line: #e2e2e2;
  --text: #0a0a0a;
  --text-dim: #4a4a4a;
  --text-faint: #68686e;
  --accent: #6b7a3a;
  --accent-strong: #4f5c25;
  --accent-soft: rgba(107, 122, 58, 0.09);
  --accent-rgb: 107, 122, 58;
  --accent2: #d43a17;
  --accent2-soft: rgba(212, 58, 23, 0.10);
  --accent2-rgb: 212, 58, 23;
  --green: #1f8a4c;
  --amber: #a3701a;
  --radius: 14px;
  --maxw: 1060px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "Cascadia Code", Consolas, monospace;
  --font-display: "Space Mono", var(--mono);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--accent-strong); color: #fff; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 20px;
}
.nav-name { font-family: var(--font-display); font-weight: 700; font-size: 15px; color: var(--text); letter-spacing: -0.01em; }
.nav-name:hover { text-decoration: none; color: var(--accent); }
.nav-links { margin-left: auto; display: flex; gap: 22px; align-items: center; }
.nav-links a { color: var(--text-dim); font-size: 14.5px; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

.chip {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--accent-soft); color: var(--accent);
  border: 1px solid rgba(var(--accent-rgb), 0.25);
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.02em;
  padding: 4px 12px; border-radius: 100px;
}
.chip .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* ---------- hero ---------- */
.hero { padding: 88px 0 56px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 300px; gap: 40px; align-items: center; }
.hero-mosaic {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 9px;
  transform: rotate(-6deg) scale(1.08);
}
.hero-mosaic .tile {
  aspect-ratio: 1; border-radius: 8px;
  background: var(--bg-card); border: 1px solid var(--line);
  transition: transform 0.2s ease;
}
.hero-mosaic .tile.resolved { background: var(--accent-soft); border-color: rgba(var(--accent-rgb), 0.4); }
.hero-mosaic .tile.done { background: rgba(31, 138, 76, 0.13); border-color: rgba(31, 138, 76, 0.4); }
.hero-mosaic .tile:hover { transform: scale(1.12); }
.hero .eyebrow {
  color: var(--accent); font-weight: 700; font-size: 13.5px;
  text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 18px;
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.18; letter-spacing: -0.01em; font-weight: 700;
  max-width: 18em;
}
.hero .lead {
  margin-top: 37px; color: var(--text-dim);
  font-size: clamp(16.5px, 1.6vw, 19px); max-width: 44em;
}
.hero-philosophy {
  margin-top: 41px; list-style: none; display: grid; gap: 10px; max-width: 34em;
}
.hero-philosophy li {
  position: relative; padding-left: 22px;
  font-size: 15.5px; font-weight: 500; color: var(--text);
  line-height: 1.4;
}
.hero-philosophy li::before {
  content: ""; position: absolute; left: 0; top: calc(0.7em - 1px);
  width: 10px; height: 2px; background: var(--accent2);
}
.hero-cta { margin-top: 47px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: 10px; font-weight: 600; font-size: 15px;
  border: 1px solid transparent; cursor: pointer; transition: all 0.15s ease;
}
.btn-primary { background: var(--accent-strong); color: #fff; }
.btn-primary:hover { background: var(--accent); text-decoration: none; transform: translateY(-1px); }
.btn-ghost { border-color: var(--line); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.prepared-for { margin-bottom: 20px; }

/* ---------- sections ---------- */
section { padding: 56px 0; }
.section-title {
  font-size: 13.5px; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 14px;
}
h2 { font-family: var(--font-display); font-size: clamp(27px, 3.6vw, 38px); font-weight: 700; letter-spacing: -0.015em; line-height: 1.18; margin-bottom: 18px; }
h3 { font-family: var(--font-display); font-size: clamp(19px, 2.2vw, 22px); font-weight: 700; letter-spacing: -0.005em; line-height: 1.3; margin: 34px 0 10px; }
p + p { margin-top: 14px; }
.muted { color: var(--text-dim); }

/* ---------- cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 26px; }
.card {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 24px;
}
.card h4 { font-size: 18.5px; margin-bottom: 10px; letter-spacing: -0.01em; }
.card p { color: var(--text-dim); font-size: 15px; }
.card .num {
  display: inline-flex; width: 30px; height: 30px; border-radius: 8px;
  background: var(--accent-soft); color: var(--accent);
  align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; margin-bottom: 14px;
}

/* ---------- loom ---------- */
.loom-box {
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 14px; margin-top: 24px;
}
.loom-box .frame { position: relative; padding-bottom: 60%; height: 0; border-radius: 8px; overflow: hidden; }
.loom-box iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ---------- case studies grid (home) ---------- */
.case-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 24px; margin-top: 26px;
}
.case-card {
  display: block; color: var(--text); text-decoration: none;
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: 20px; overflow: hidden;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.28s ease;
}
.case-card:hover {
  transform: translateY(-3px); border-color: rgba(var(--accent-rgb), 0.35); text-decoration: none;
  box-shadow:
    0 0 0 1px rgba(var(--accent-rgb), 0.12),
    0 18px 34px -14px rgba(var(--accent-rgb), 0.45),
    0 10px 30px -10px rgba(var(--accent2-rgb), 0.3);
}
.case-card .case-shot {
  height: 220px; padding: 16px 28px; box-sizing: content-box;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
}
.case-card .case-shot img {
  display: block; width: auto; height: auto;
  max-width: 100%; max-height: 220px;
  border: 1px solid var(--text);
}
.case-card .case-body-top { padding: 26px 28px 0; }
.case-card .case-body-bottom { padding: 20px 28px 30px; }
.case-card .case-quote {
  margin: 16px 28px 20px; padding: 0 0 0 14px;
  border-left: 3px solid var(--accent-strong);
  font-size: 14.5px; font-style: italic; font-weight: 500;
  color: var(--text); line-height: 1.4;
  min-height: 1.4em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.case-card h3 {
  margin: 0 0 8px; min-height: 2.6em;
  display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden;
}
.case-card .case-summary {
  color: var(--text-dim); font-size: 15px; min-height: 6.6em;
  display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 4; overflow: hidden;
}
.case-card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; }
.case-card .case-stat { margin-top: 18px; }
.case-card .case-stat .n {
  display: block; font-family: var(--font-display); font-size: 20px; font-weight: 700;
  color: var(--accent2);
}
.case-card .case-stat .l { font-size: 13px; color: var(--text-dim); }
.case-card .case-link { display: inline-block; margin-top: 18px; font-weight: 600; color: var(--accent-strong); }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 12.5px; font-weight: 600; color: var(--text-dim);
  border: 1px solid var(--line); border-radius: 100px; padding: 3px 11px;
}

/* ---------- screenshot frames ---------- */
.shot {
  border-radius: 12px; overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: 0 24px 60px -18px rgba(28, 23, 18, 0.3);
}
.shot .bar {
  display: flex; gap: 6px; align-items: center;
  background: #0a0a0a; padding: 9px 12px;
}
.shot .bar i { width: 9px; height: 9px; border-radius: 50%; background: #4a4a4a; display: block; }
.shot img { display: block; width: 100%; height: auto; }
.shot.crop img { max-height: 420px; object-fit: cover; object-position: top; }
.shot-caption { margin-top: 12px; font-size: 14px; color: var(--text-faint); }
.illustration-note { margin-top: 8px; font-size: 13px; color: var(--text-faint); font-style: italic; }

/* ---------- case study layout ---------- */
.cs-hero { padding: 72px 0 30px; }
.cs-meta {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  margin: 34px 0 8px;
}
.cs-meta div {
  border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px;
  background: var(--bg-card);
}
.cs-meta dt { font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); font-weight: 700; }
.cs-meta dd { margin-top: 5px; font-size: 15.5px; color: var(--text); font-weight: 600; }

.lens {
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  background: var(--accent-soft);
  border-radius: var(--radius); padding: 24px 26px; margin: 30px 0;
}
.lens .lens-title { color: var(--accent); font-weight: 700; font-size: 14px; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 8px; }
.lens p { color: var(--text); }

/* ---------- TL;DR impact strip ---------- */
.tldr {
  border: 1px solid var(--line); background: var(--bg-card);
  border-radius: 18px; padding: 30px 32px; margin: 30px 0 0;
}
.tldr-label {
  font-family: var(--font-display); font-size: 12px; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 12px;
}
.tldr-line { font-size: clamp(18px, 2vw, 21px); line-height: 1.45; color: var(--text); font-weight: 500; max-width: 52em; }
.tldr-line strong { color: var(--accent2); }
.tldr-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-top: 26px; padding-top: 24px; border-top: 1px solid var(--line);
}
.tldr-stats .n {
  display: block; font-family: var(--font-display); font-size: 29px; font-weight: 700;
  color: var(--accent2); letter-spacing: -0.015em; font-variant-numeric: tabular-nums;
}
.tldr-stats .l { display: block; margin-top: 4px; font-size: 13px; color: var(--text-dim); line-height: 1.4; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; margin-top: 26px; }
.split.rev { direction: rtl; } .split.rev > * { direction: ltr; }

/* ---------- text-only carousel (interaction model) ---------- */
.carousel { margin-top: 26px; }
.carousel-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; margin-bottom: 14px;
}
.carousel-current-index {
  font-family: var(--font-display); font-weight: 700;
  font-size: 13px; color: var(--accent); letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}
.carousel-viewport { overflow: hidden; transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1); }
.carousel-track { display: flex; align-items: flex-start; transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1); }
.carousel-slide {
  flex: 0 0 100%; max-width: 100%; box-sizing: border-box;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 34px;
}
.carousel-slide h3 { margin-top: 0; margin-bottom: 8px; max-width: 34em; font-size: clamp(17px, 2vw, 20px); }
.carousel-slide p, .carousel-slide blockquote { max-width: 40em; }
.carousel-media { margin-top: 16px; }
.carousel-media .shot img { display: block; width: 100%; height: auto; }
.carousel-controls { display: flex; align-items: center; gap: 14px; }
.carousel-btn {
  width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--bg-card); color: var(--text); font-size: 16px; line-height: 1;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}
.carousel-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.carousel-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.carousel-dots { display: flex; gap: 9px; }
.carousel-dots .dot {
  width: 9px; height: 9px; border-radius: 50%; background: var(--line); border: none; padding: 0;
  cursor: pointer; transition: background 0.15s ease, transform 0.15s ease;
}
.carousel-dots .dot.active { background: var(--accent); transform: scale(1.25); }
@media (max-width: 620px) {
  .carousel-slide { padding: 24px 22px; }
}

blockquote {
  border-left: 3px solid var(--accent-strong);
  padding: 4px 0 4px 22px; margin: 8px 0 28px;
  color: var(--text); font-size: clamp(19px, 2.2vw, 22px); line-height: 1.4;
  font-style: italic; font-weight: 500; letter-spacing: -0.005em;
}

table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 15px; }
th { text-align: left; color: var(--text-faint); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.08em; padding: 10px 14px; border-bottom: 1px solid var(--line); }
td { padding: 11px 14px; border-bottom: 1px solid var(--line); color: var(--text-dim); }
td strong, td b { color: var(--text); }
tr:last-child td { border-bottom: none; }
.table-card { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.table-card + * { margin-top: 15px; }
.table-card + blockquote { margin-top: 23px; }

code {
  font-family: var(--mono); font-size: 0.86em;
  background: var(--bg-raise); border: 1px solid var(--line);
  padding: 2px 6px; border-radius: 6px; color: var(--accent);
}
pre {
  background: var(--bg-raise); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px; overflow-x: auto;
  font-family: var(--mono); font-size: 13.5px; line-height: 1.6;
  color: var(--text-dim); margin: 22px 0;
}
pre code { background: none; border: none; padding: 0; color: inherit; font-size: 1em; }

.divider { border: none; border-top: 1px solid var(--line); margin: 10px 0; }

/* dash bullet list (prose bullets, not the .principles card treatment) */
.bullet-list { list-style: none; margin: 14px 0; display: grid; gap: 10px; }
.bullet-list li {
  position: relative; padding-left: 22px;
  color: var(--text-dim); font-size: 16.5px; line-height: 1.6;
}
.bullet-list li::before {
  content: ""; position: absolute; left: 0; top: 0.75em;
  width: 10px; height: 2px; background: var(--accent2);
}
.bullet-list li strong { color: var(--text); }

/* numbered list (prose bullets, not the .principles card treatment) */
.numbered-list { counter-reset: nl; list-style: none; margin: 18px 0; display: grid; gap: 12px; }
.numbered-list li {
  position: relative; padding-left: 34px;
  color: var(--text-dim); font-size: 16.5px; line-height: 1.65;
}
.numbered-list li::before {
  counter-increment: nl; content: counter(nl) ".";
  position: absolute; left: 0; top: 0;
  font-family: var(--font-display); font-weight: 700; color: var(--accent);
  font-size: 15px;
}

/* principle list */
.principles { counter-reset: p; display: grid; gap: 14px; margin-top: 26px; }
.principle {
  display: grid; grid-template-columns: 46px 1fr; gap: 18px;
  background: var(--bg-card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 24px;
}
.principle::before {
  counter-increment: p; content: "0" counter(p);
  font-family: var(--mono); font-weight: 700; color: var(--accent);
  font-size: 18px; padding-top: 2px;
}
.principle h4 { margin-bottom: 6px; font-size: 18px; }
.principle p { color: var(--text-dim); font-size: 15px; }

/* bento variant: 2 rows x 3 columns, one card spans both rows */
.principles.bento {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
}
.principles.bento .principle { height: 100%; }
.principles.bento .principle-tall {
  grid-column: 3; grid-row: 1 / span 2;
  grid-template-columns: 1fr; align-content: start; gap: 12px;
}
.principles.bento .principle-tall::before { font-size: 30px; }
.principles.bento .principle-tall h4 { font-size: 22px; margin-bottom: 8px; }
.principles.bento .principle-tall p { font-size: 16px; line-height: 1.65; }
@media (max-width: 900px) {
  .principles.bento { grid-template-columns: 1fr; grid-template-rows: none; }
  .principles.bento .principle-tall { grid-column: 1; grid-row: auto; }
}

/* ---------- reading progress ---------- */
.progress-rail { position: sticky; top: 0; z-index: 60; height: 3px; background: transparent; }
.progress-bar {
  height: 100%; width: 100%; background: var(--accent);
  transform: scaleX(0); transform-origin: 0 0;
  transition: transform 0.1s linear;
}

/* ---------- expandable detail sections ---------- */
.expand-toggle {
  display: inline-flex; align-items: center; gap: 7px;
  background: none; border: 1px solid var(--line); color: var(--text-dim);
  font-family: var(--font); font-size: 13px; font-weight: 600;
  padding: 8px 16px; border-radius: 100px; cursor: pointer; margin-top: 8px;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.expand-toggle:hover { border-color: var(--accent); color: var(--accent); }
.expand-toggle .chev { transition: transform 0.2s ease; font-size: 12px; }
.expand.open .expand-toggle .chev { transform: rotate(180deg); }
.expand-body {
  display: grid; grid-template-rows: 0fr; transition: grid-template-rows 0.3s ease;
}
.expand-body > div { overflow: hidden; }
.expand.open .expand-body { grid-template-rows: 1fr; margin-top: 14px; }

/* ---------- hover-lift micro-interaction ---------- */
.card, .principle, .tldr-stats > div {
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.card:hover, .principle:hover { transform: translateY(-3px); border-color: rgba(var(--accent-rgb), 0.35); }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 44px 0 60px; margin-top: 40px; }
footer .foot-inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }
footer .note { color: var(--text-faint); font-size: 13.5px; }

/* ---------- hidden role switcher ---------- */
.switcher {
  position: fixed; bottom: 20px; right: 20px; z-index: 100;
  background: var(--bg-raise); border: 1px solid var(--accent-strong);
  border-radius: 14px; padding: 16px; width: 240px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.6); display: none;
}
.switcher.open { display: block; }
.switcher h5 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-faint); margin-bottom: 10px; }
.switcher button {
  display: block; width: 100%; text-align: left; margin-bottom: 6px;
  background: var(--bg-card); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 8px 12px; font-size: 14px; font-family: var(--font);
  cursor: pointer;
}
.switcher button:hover, .switcher button.active { border-color: var(--accent); color: var(--accent); }
.switcher .hint { font-size: 12px; color: var(--text-faint); margin-top: 8px; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .split, .split.rev { grid-template-columns: 1fr; direction: ltr; }
  .cs-meta { grid-template-columns: repeat(2, 1fr); }
  .tldr-stats { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 56px 0 40px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-mosaic { display: none; }
}
@media (max-width: 560px) {
  .nav-links a.optional { display: none; }
}