/* ==========================================================================
   Pranav Joshi — portfolio
   Light/dark follows the OS preference. One accent, editorial type,
   restrained motion (disabled under prefers-reduced-motion).
   ========================================================================== */

:root {
  --bg: #f5f3ee;
  --bg-elev: #fbfaf7;
  --surface-2: #ece8df;
  --ink: #16181a;
  --ink-2: #41464c;
  --ink-3: #5c6168;
  --line: #d9d3c7;
  --line-strong: #bfb7a8;
  --accent: #0a675c;
  --accent-strong: #07524a;
  --accent-ink: #ffffff;
  --accent-soft: #dce9e3;
  --bad: #a3361f;
  --good: #1f6b2f;

  --s-shipped: #23803a;
  --s-validated: #0a7e70;
  --s-contributed: #2f63b0;
  --s-supported: #7156b3;
  --s-explored: #b5701a;
  --s-progress: #b5701a;

  --glow: rgba(10, 103, 92, 0.1);
  --shadow: 0 1px 2px rgba(22, 24, 26, 0.04), 0 8px 24px -12px rgba(22, 24, 26, 0.12);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --radius: 14px;
  --radius-sm: 8px;
  --header-h: 4rem;
  --gutter: clamp(1rem, 4vw, 2.5rem);

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101315;
    --bg-elev: #161a1d;
    --surface-2: #1d2226;
    --ink: #ecebe5;
    --ink-2: #bec2c1;
    --ink-3: #9aa0a2;
    --line: #2a3035;
    --line-strong: #3b434a;
    --accent: #72cdbb;
    --accent-strong: #9adccf;
    --accent-ink: #0a1a17;
    --accent-soft: #15302a;
    --bad: #f0907a;
    --good: #8fd49b;

    --s-shipped: #6fd08a;
    --s-validated: #72cdbb;
    --s-contributed: #8db4f0;
    --s-supported: #b7a3ef;
    --s-explored: #eab36a;
    --s-progress: #eab36a;

    --glow: rgba(114, 205, 187, 0.08);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -16px rgba(0, 0, 0, 0.6);
  }
}

/* ---------- base ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  background:
    radial-gradient(60rem 32rem at 85% -10%, var(--glow), transparent 70%),
    var(--bg);
  background-repeat: no-repeat;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.2;
  font-weight: 600;
}

p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent-strong);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

main:focus {
  outline: none;
}

::selection {
  background: var(--accent-soft);
  color: var(--ink);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
  color: var(--accent-ink);
}

.wrap {
  width: 100%;
  max-width: 74rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- header & nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.brand:hover {
  color: var(--ink);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 9px;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-nav ul {
  display: flex;
  gap: 0.25rem;
}

.site-nav a {
  display: block;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.site-nav a:hover {
  color: var(--ink);
  background: var(--surface-2);
}

.site-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--surface-2);
  box-shadow: inset 0 0 0 1px var(--line-strong);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 1rem;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle__bars::before {
  top: -5px;
}

.nav-toggle__bars::after {
  top: 5px;
}

.is-open .nav-toggle__bars {
  background: transparent;
}

.is-open .nav-toggle__bars::before {
  transform: translateY(5px) rotate(45deg);
}

.is-open .nav-toggle__bars::after {
  transform: translateY(-5px) rotate(-45deg);
}

@media (max-width: 55.99rem) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 0.5rem var(--gutter) 1rem;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

  .is-open .site-nav {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0.1rem;
  }

  .site-nav a {
    padding: 0.75rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 1.05rem;
  }
}

/* ---------- buttons ---------- */

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.6rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.975rem;
  font-weight: 500;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.button svg {
  width: 1.05rem;
  height: 1.05rem;
}

.button--primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.button--primary:hover {
  background: var(--accent-strong);
  color: var(--accent-ink);
}

.button--ghost {
  border-color: var(--line-strong);
  color: var(--ink);
}

.button--ghost:hover {
  border-color: var(--ink-3);
  background: var(--surface-2);
  color: var(--ink);
}

/* ---------- hero ---------- */

.hero {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
  padding-block: clamp(3.5rem, 9vw, 7rem) clamp(3rem, 6vw, 5rem);
}

@media (min-width: 60rem) {
  .hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }
}

.eyebrow {
  margin-bottom: 1.25rem;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 5.4vw, 4.25rem);
  font-weight: 500;
  font-variation-settings: "opsz" 144;
  line-height: 1.04;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.hero__title em {
  color: var(--accent);
  font-style: italic;
  font-weight: 400;
}

.hero__lead {
  max-width: 38rem;
  margin-top: 1.5rem;
  color: var(--ink-2);
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.hero__links {
  display: contents;
}

/* debug-trace motif */
.trace {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.trace::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent 80%);
}

.trace__bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--line);
}

.trace__bar span {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--line-strong);
}

.trace__bar code {
  margin-left: 0.5rem;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.trace__lines {
  display: grid;
  gap: 0.15rem;
  padding: 1rem 1rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.trace__lines li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.75rem;
  padding: 0.45rem 0.5rem;
  border-radius: 6px;
}

.trace__lines li:nth-child(3),
.trace__lines li:nth-child(4) {
  background: var(--surface-2);
}

.trace__key {
  color: var(--ink-3);
}

@media (max-width: 30rem) {
  .trace__lines {
    padding-inline: 0.6rem;
    font-size: 0.8rem;
  }

  .trace__lines li {
    grid-template-columns: 4.25rem 1fr;
    gap: 0.5rem;
  }
}

.trace__lines li:nth-child(3) .trace__key {
  color: var(--bad);
}

.trace__lines li:nth-child(4) .trace__key,
.trace__lines li:nth-child(5) .trace__key {
  color: var(--accent);
}

.trace__val {
  color: var(--ink);
}

.trace__ok {
  color: var(--good);
  font-weight: 500;
}

.trace__caption {
  padding: 0.5rem 1.5rem 1.1rem;
  color: var(--ink-3);
  font-size: 0.85rem;
}

@media (prefers-reduced-motion: no-preference) {
  .trace__lines li {
    animation: trace-in 0.45s ease both;
  }

  .trace__lines li:nth-child(1) { animation-delay: 0.1s; }
  .trace__lines li:nth-child(2) { animation-delay: 0.25s; }
  .trace__lines li:nth-child(3) { animation-delay: 0.4s; }
  .trace__lines li:nth-child(4) { animation-delay: 0.55s; }
  .trace__lines li:nth-child(5) { animation-delay: 0.7s; }
  .trace__lines li:nth-child(6) { animation-delay: 0.85s; }
}

@keyframes trace-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
}

.noscript {
  padding-block: 1rem;
  color: var(--ink-2);
}

/* ---------- inner-page hero ---------- */

.page-hero {
  padding-block: clamp(3rem, 7vw, 5.5rem) clamp(2.5rem, 5vw, 4rem);
}

.page-hero__title {
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.6vw, 3.6rem);
  font-weight: 500;
  font-variation-settings: "opsz" 144;
  line-height: 1.08;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.page-hero__lead {
  max-width: 44rem;
  margin-top: 1.25rem;
  color: var(--ink-2);
  font-size: clamp(1.05rem, 1.5vw, 1.15rem);
}

.page-toc ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.page-toc a {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.4rem 0.95rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.925rem;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.page-toc a:hover {
  border-color: var(--ink-3);
  background: var(--surface-2);
  color: var(--ink);
}

/* ---------- sections ---------- */

.section {
  padding-block: clamp(3.5rem, 8vw, 6rem);
  border-top: 1px solid var(--line);
}

.section--flush {
  padding-top: clamp(2rem, 5vw, 3rem);
}

.section__head {
  display: grid;
  gap: 0.5rem 2rem;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

@media (min-width: 48rem) {
  .section__head {
    grid-template-columns: 4.5rem minmax(0, 1fr);
  }

  .section__head > :not(.section__num) {
    grid-column: 2;
  }
}

.section__num {
  padding-top: 0.55rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.6vw, 2.75rem);
  font-weight: 500;
  font-variation-settings: "opsz" 96;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.section__intro {
  max-width: 44rem;
  color: var(--ink-2);
}

/* ---------- shared: status & tags ---------- */

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.status__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--dot, var(--ink-3));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--dot, var(--ink-3)) 20%, transparent);
}

.status--built { --dot: var(--s-shipped); }
.status--solo { --dot: var(--s-shipped); }
.status--researched { --dot: var(--s-validated); }
.status--shipped { --dot: var(--s-shipped); }
.status--validated { --dot: var(--s-validated); }
.status--contributed { --dot: var(--s-contributed); }
.status--supported { --dot: var(--s-supported); }
.status--explored { --dot: var(--s-explored); }
.status--progress { --dot: var(--s-progress); }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tags li {
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elev);
  color: var(--ink-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
}

/* ---------- focus (home) ---------- */

.focus-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 52rem) {
  .focus-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.focus {
  position: relative;
  display: grid;
  gap: 0.9rem;
  align-content: start;
  padding: clamp(1.4rem, 3vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.focus::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent 85%);
}

.focus__label {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.focus h3 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
  font-weight: 500;
  letter-spacing: -0.015em;
}

.focus__body {
  color: var(--ink-2);
}

.focus__points {
  display: grid;
  gap: 0.5rem;
  padding-top: 0.25rem;
}

.focus__points li {
  position: relative;
  padding-left: 1.35rem;
  font-size: 0.95rem;
}

.focus__points li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.focus__link {
  justify-self: start;
  margin-top: 0.5rem;
  font-weight: 500;
}

/* ---------- explore (home) ---------- */

.explore {
  display: grid;
  gap: 1rem;
}

@media (min-width: 40rem) {
  .explore {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64rem) {
  .explore {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.explore__card {
  display: grid;
  gap: 0.5rem;
  align-content: start;
  height: 100%;
  padding: 1.3rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.explore__card:hover {
  border-color: var(--accent);
  background: var(--bg-elev);
  color: inherit;
}

.explore__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
}

.explore__title span {
  color: var(--accent);
}

.explore__body {
  color: var(--ink-2);
  font-size: 0.925rem;
}

/* ---------- impact ---------- */

.impact-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 40rem) {
  .impact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* Five-card grids: 1 column → 2 columns → 6-track editorial layout. */
@media (min-width: 40rem) {
  .toolkit,
  .projects {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .toolkit > :last-child:nth-child(odd),
  .projects > :last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }
}

@media (min-width: 64rem) {
  .toolkit,
  .projects {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .toolkit > *,
  .projects > *,
  .toolkit > :last-child:nth-child(odd),
  .projects > :last-child:nth-child(odd) {
    grid-column: span 2;
  }

  /* with five items, the last two share the second row */
  .toolkit > :nth-child(4):nth-last-child(2),
  .toolkit > :nth-child(5):last-child,
  .projects > :nth-child(4):nth-last-child(2),
  .projects > :nth-child(5):last-child {
    grid-column: span 3;
  }
}

.impact__link {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  height: 100%;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.impact__link:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
  color: inherit;
}

.impact__title {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.impact__body {
  color: var(--ink-2);
  font-size: 0.975rem;
}

.impact__more {
  margin-top: auto;
  padding-top: 0.25rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

@media (prefers-reduced-motion: no-preference) {
  .impact__link:hover {
    transform: translateY(-2px);
  }
}

/* ---------- case studies ---------- */

.cases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.case {
  position: relative;
  padding: clamp(1.4rem, 3.5vw, 2.75rem);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: var(--bg-elev);
  box-shadow: var(--shadow);
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.case__head {
  display: grid;
  gap: 0.85rem;
  max-width: 52rem;
}

.case__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.25rem;
}

.case__index {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.case__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  font-weight: 500;
  font-variation-settings: "opsz" 96;
  letter-spacing: -0.02em;
}

.case__kicker {
  color: var(--ink-2);
  font-size: 1.075rem;
}

.case__body {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

@media (min-width: 60rem) {
  .case__body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 3rem;
  }
}

.case__summary {
  display: grid;
  gap: 1.35rem;
}

.case__summary dt,
.case__notes h4,
.case__did h4 {
  margin-bottom: 0.35rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case__summary dd {
  color: var(--ink);
}

.case__learned {
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--accent-soft);
}

.case__learned dd {
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.5;
}

/* expandable detail */
.case__more {
  margin-top: 2rem;
}

.case__more > summary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 2.75rem;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.case__more > summary::-webkit-details-marker {
  display: none;
}

.case__more > summary::after {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  margin-top: -0.2rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

.case__more[open] > summary::after {
  margin-top: 0.2rem;
  transform: rotate(-135deg);
}

.case__more > summary:hover {
  border-color: var(--ink-3);
  background: var(--surface-2);
}

.case__more-close,
.case__more[open] .case__more-open {
  display: none;
}

.case__more[open] .case__more-close {
  display: inline;
}

.case__detail {
  display: grid;
  gap: 2rem;
  margin-top: 1.75rem;
}

@media (prefers-reduced-motion: no-preference) {
  .case__more[open] .case__detail {
    animation: fade-in 0.3s ease both;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

.case__did ul {
  column-gap: 2.5rem;
}

@media (min-width: 60rem) {
  .case__did ul {
    columns: 2;
  }
}

.case__did li {
  position: relative;
  margin-bottom: 0.6rem;
  break-inside: avoid;
  padding-left: 1.25rem;
  color: var(--ink-2);
  font-size: 0.975rem;
}

.case__did li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.5rem;
  height: 1px;
  background: var(--accent);
}

.case__notes {
  display: grid;
  gap: 1.5rem;
  padding-top: 1.75rem;
  border-top: 1px dashed var(--line-strong);
}

@media (min-width: 52rem) {
  .case__notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2rem;
  }
}

.case__notes p {
  color: var(--ink-2);
  font-size: 0.975rem;
}

/* ---------- visuals ---------- */

.visual {
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.visual figcaption {
  color: var(--ink-3);
  font-size: 0.875rem;
}

/* vertical pipeline */
.flow {
  position: relative;
  display: grid;
  gap: 0.5rem;
  counter-reset: flow;
}

.flow::before {
  content: "";
  position: absolute;
  left: 1.3rem;
  top: 1.25rem;
  bottom: 1.25rem;
  width: 1px;
  background: linear-gradient(var(--accent), var(--line-strong));
}

.flow__step {
  position: relative;
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 0.75rem;
  align-items: center;
  padding: 0.7rem 1rem 0.7rem 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg);
}

.flow__num {
  grid-row: 1 / span 2;
  justify-self: center;
  display: grid;
  place-items: center;
  width: 1.9rem;
  height: 1.9rem;
  border: 1px solid var(--accent);
  border-radius: 50%;
  background: var(--bg-elev);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.flow__label {
  font-weight: 500;
  line-height: 1.3;
}

.flow__note {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.flow--loop .flow__step:last-child .flow__num {
  background: var(--accent);
  color: var(--accent-ink);
}

.flow__repeat {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* feature tiles */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11rem), 1fr));
  gap: 0.5rem;
}

.features li:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.features li {
  display: grid;
  gap: 0.15rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--bg);
}

.features__label {
  font-weight: 500;
  line-height: 1.3;
}

.features__note {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.case__site {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-top: 0.25rem;
}

.case__site-url {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* reconciliation diagram */
.recon {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
  gap: 0.75rem;
}

.recon__panel {
  display: grid;
  gap: 0.6rem;
  align-content: start;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg);
}

.recon__panel--after {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
}

.recon__label {
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.recon__panel--after .recon__label {
  color: var(--accent);
}

.recon__source {
  font-weight: 500;
  line-height: 1.3;
}

.recon__rows {
  display: grid;
  gap: 0.3rem;
}

.recon__rows li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0 0.5rem;
  white-space: nowrap;
  padding: 0.35rem 0.55rem;
  border-radius: 6px;
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.recon__val {
  color: var(--ink-3);
}

.recon__panel--after .recon__val {
  color: var(--accent);
}

.recon__result {
  display: grid;
  gap: 0.1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}


.recon__result--bad {
  color: var(--bad);
}

.recon__result--good {
  color: var(--good);
}

/* ---------- more work ---------- */

.feature {
  display: grid;
  gap: 2rem;
  padding: clamp(1.4rem, 3.5vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background: var(--bg-elev);
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

@media (min-width: 60rem) {
  .feature {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
    gap: 3rem;
  }
}

.feature__head {
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.feature h3 {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.6vw, 1.9rem);
  font-weight: 500;
  letter-spacing: -0.015em;
}

.feature__summary {
  color: var(--ink-2);
}

.feature__steps {
  display: grid;
  gap: 0;
}

.feature__steps li {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr);
  gap: 1rem;
  padding-block: 0.8rem;
  border-top: 1px solid var(--line);
}

.feature__steps li:first-child {
  border-top: 0;
  padding-top: 0;
}

.feature__step {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding-top: 0.15rem;
}

.feature__steps p {
  color: var(--ink-2);
  font-size: 0.975rem;
}

@media (max-width: 30rem) {
  .feature__steps li {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
}

.breadth {
  display: grid;
  gap: 1rem;
}

@media (min-width: 40rem) {
  .breadth {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 64rem) {
  .breadth {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.breadth {
  margin-top: 1rem;
}

.breadth__card {
  display: grid;
  gap: 0.6rem;
  align-content: start;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.breadth__card h3 {
  font-size: 1.05rem;
}

.breadth__card p {
  color: var(--ink-2);
  font-size: 0.925rem;
}

/* ---------- approach ---------- */

.approach {
  display: grid;
  gap: 2rem 1.5rem;
}

@media (min-width: 36rem) {
  .approach {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 60rem) {
  .approach {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2.5rem 2rem;
  }
}

.approach__step {
  position: relative;
  display: grid;
  gap: 0.5rem;
  align-content: start;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-strong);
}

.approach__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 2.5rem;
  height: 3px;
  background: var(--accent);
}

.approach__num {
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-style: italic;
}

.approach__step h3 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 500;
}

.approach__step p {
  color: var(--ink-2);
  font-size: 0.975rem;
}

/* ---------- toolkit ---------- */

.toolkit {
  display: grid;
  gap: 1rem;
}

.tool-group {
  display: grid;
  gap: 0.9rem;
  align-content: start;
  padding: 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
}

.tool-group h3 {
  font-size: 1.05rem;
}

.tool-group__evidence {
  margin-top: auto;
  color: var(--ink-2);
  font-size: 0.9rem;
}

.tool-group__evidence span {
  margin-right: 0.35rem;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- timeline ---------- */

.timeline {
  position: relative;
  display: grid;
  gap: 0;
}

.timeline__item {
  position: relative;
  display: grid;
  gap: 0.25rem 2rem;
  padding: 0 0 2.25rem 2rem;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: 0.3rem;
  top: 0.5rem;
  bottom: 0;
  width: 1px;
  background: var(--line-strong);
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item:last-child::before {
  display: none;
}

.timeline__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: 0.65rem;
  height: 0.65rem;
  border: 2px solid var(--line-strong);
  border-radius: 50%;
  background: var(--bg);
}

.timeline__item--current::after {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 5px var(--accent-soft);
}

.timeline__phase {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.timeline__item h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
}

.timeline__item p:not(.timeline__phase) {
  max-width: 40rem;
  color: var(--ink-2);
}

@media (min-width: 48rem) {
  .timeline__item {
    grid-template-columns: 11rem minmax(0, 1fr);
    padding-left: 2.5rem;
  }

  .timeline__phase {
    grid-row: 1 / span 2;
    padding-top: 0.35rem;
  }
}

/* ---------- learning ---------- */

.learning__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 0.85rem;
  line-height: 1.4;
}

.chip--done {
  background: var(--bg-elev);
}

.chip--done::before {
  content: "✓";
  color: var(--good);
  font-size: 0.8rem;
}

.chip--progress {
  border-style: dashed;
  border-color: var(--s-progress);
  color: var(--ink);
}

.chip--progress::before {
  content: "◐";
  color: var(--s-progress);
  font-size: 0.8rem;
}

.learning__rows {
  display: grid;
  border-top: 1px solid var(--line);
}

.learn-row {
  display: grid;
  gap: 0.75rem 1.5rem;
  align-items: center;
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 52rem) {
  .learn-row {
    grid-template-columns: minmax(0, 1.2fr) auto minmax(0, 1fr);
  }
}

.learn-row__learned {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.learn-row__arrow {
  color: var(--accent);
  font-size: 1.1rem;
}

@media (max-width: 51.99rem) {
  .learn-row__arrow {
    display: none;
  }
}

.learn-row__applied {
  color: var(--ink-2);
  font-size: 0.975rem;
}

/* ---------- earlier projects ---------- */

.projects {
  display: grid;
  gap: 1rem;
}

.project {
  display: grid;
  gap: 0.7rem;
  align-content: start;
  padding: 1.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.project h3 {
  font-size: 1.05rem;
}

.project p {
  color: var(--ink-2);
  font-size: 0.925rem;
}

.project__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  justify-self: start;
  margin-top: 0.25rem;
  padding-block: 0.3rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.project__link svg {
  width: 1rem;
  height: 1rem;
}

/* ---------- about ---------- */

.about__grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 60rem) {
  .about__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 4rem;
  }

  .about .section__head + .about__grid {
    padding-left: 6.5rem;
  }
}

.about__text {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.about__text p {
  color: var(--ink-2);
}

.about__text .about__lead {
  color: var(--ink);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.3vw, 1.65rem);
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.about__list {
  display: grid;
  gap: 1rem;
}

.about__list li {
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
  color: var(--ink-2);
  font-size: 0.975rem;
}

.about__list strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
}

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

.contact__lead {
  max-width: 40rem;
  margin-bottom: 1.75rem;
  color: var(--ink-2);
  font-size: 1.1rem;
}

@media (min-width: 48rem) {
  .contact__lead,
  .contact__links {
    margin-left: 6.5rem;
  }
}

.contact__links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  gap: 1rem;
  max-width: 44rem;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-elev);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow);
  color: var(--ink);
}

.contact-card__icon {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  background: var(--surface-2);
}

.contact-card__icon svg {
  width: 1.2rem;
  height: 1.2rem;
}

.contact-card__text {
  display: grid;
  flex: 1;
  min-width: 0;
}

.contact-card__label {
  font-weight: 600;
}

.contact-card__handle {
  overflow: hidden;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.contact-card__arrow {
  color: var(--accent);
}

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

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--ink-3);
  font-size: 0.875rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 2rem;
}

.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
}

.site-footer__nav a,
.site-footer__links a {
  color: var(--ink-2);
}

.site-footer__nav a[aria-current="page"] {
  color: var(--ink);
}

.site-footer__links {
  flex: 1;
}

.site-footer__top {
  color: var(--ink-2);
}

/* ---------- motion & print ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  body {
    background: #fff;
    color: #000;
  }

  .site-header,
  .skip-link,
  .hero__actions,
  .case__more > summary,
  .site-footer__top {
    display: none;
  }

  .case,
  .feature,
  .impact__link,
  .tool-group {
    box-shadow: none;
    break-inside: avoid;
  }
}