/* ==========================================================================
   Portfolio — design tokens and components per DESIGN.md
   ========================================================================== */

:root {
  /* Colours */
  --color-parchment: #fefffc;
  --color-paper: #ffffff;
  --color-linen: #f9faf7;
  --color-ink-black: #171717;
  --color-graphite: #2c2c2c;
  --color-charcoal: #444141;
  --color-ash: #646464;
  --color-fog: #b4b8b4;
  --color-mist: #dee2de;
  --color-twilight: #282834;
  --color-dusk: #1f1f29;
  --color-terminal-green: #0f7a5c;
  --color-pine: #0b3d33;

  /* Fonts */
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;

  /* Type scale */
  --text-caption: 13px;    --leading-caption: 1.3;    --tracking-caption: -0.13px;
  --text-body-sm: 15px;    --leading-body-sm: 1.4;    --tracking-body-sm: -0.15px;
  --text-body: 16px;       --leading-body: 1.5;       --tracking-body: -0.16px;
  --text-subheading: 18px; --leading-subheading: 1.3; --tracking-subheading: -0.18px;
  --text-heading-sm: 27px; --leading-heading-sm: 1.3; --tracking-heading-sm: -1.08px;
  --text-heading: 40px;    --leading-heading: 1.1;    --tracking-heading: -0.8px;
  --text-heading-lg: 48px; --leading-heading-lg: 1.1; --tracking-heading-lg: -0.96px;
  --text-display: 54px;    --leading-display: 1.1;    --tracking-display: -1.08px;

  /* Spacing */
  --spacing-4: 4px; --spacing-8: 8px; --spacing-12: 12px; --spacing-16: 16px;
  --spacing-20: 20px; --spacing-24: 24px; --spacing-32: 32px; --spacing-40: 40px;
  --spacing-48: 48px; --spacing-64: 64px; --spacing-80: 80px;

  /* Layout */
  --page-max-width: 1200px;

  /* Radii */
  --radius-buttons: 8px;
  --radius-cards: 12px;
  --radius-cards-lg: 16px;
  --radius-surface: 24px;
  --radius-nav: 50px;

  /* Shadows */
  --shadow-sm: rgba(0, 0, 0, 0.15) 0px 2px 6px 0px;
  --shadow-subtle: rgba(0, 0, 0, 0.08) 0px 1px 1px 0px, rgba(0, 0, 0, 0.08) 0px 4px 5px 0px;
  --shadow-sm-2: rgba(0, 0, 0, 0.05) 0px 1px 8px 0px;
}

/* ---- Reset ---- */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--color-parchment);
  color: var(--color-charcoal);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  letter-spacing: var(--tracking-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

::selection { background: var(--color-terminal-green); color: var(--color-paper); }

:focus-visible {
  outline: 2px solid var(--color-terminal-green);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---- Typography ---- */

h1, h2, h3.display {
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--color-graphite);
  font-feature-settings: "liga" 0;
}

h1 {
  font-size: var(--text-display);
  line-height: var(--leading-display);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--text-heading);
  line-height: var(--leading-heading);
  letter-spacing: -0.02em;
}

h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-heading-sm);
  line-height: var(--leading-heading-sm);
  letter-spacing: -0.04em;
  color: var(--color-graphite);
}

h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--text-subheading);
  line-height: var(--leading-subheading);
  letter-spacing: var(--tracking-subheading);
  color: var(--color-graphite);
}

p { color: var(--color-charcoal); }

a {
  color: var(--color-terminal-green);
  text-decoration: none;
  transition: color 120ms ease-out;
}

a:hover { color: var(--color-pine); }

strong { font-weight: 600; color: var(--color-graphite); }

em { font-style: italic; }

.muted { color: var(--color-ash); }

.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--text-caption);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-terminal-green);
}

.lead {
  font-size: var(--text-subheading);
  line-height: 1.6;
  color: var(--color-charcoal);
}

/* ---- Layout ---- */

.container {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-24);
}

.section { padding: var(--spacing-64) 0; }
.section--roomy { padding: var(--spacing-80) 0; }

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-48);
  align-items: center;
}

/* prevent grid blowout from wide <pre> content */
.split > *, .grid-2 > *, .grid-3 > * { min-width: 0; }

body { overflow-x: hidden; }

.stack-8  > * + * { margin-top: var(--spacing-8); }
.stack-12 > * + * { margin-top: var(--spacing-12); }
.stack-16 > * + * { margin-top: var(--spacing-16); }
.stack-24 > * + * { margin-top: var(--spacing-24); }
.stack-32 > * + * { margin-top: var(--spacing-32); }

.rule {
  border: 0;
  border-top: 1px solid var(--color-mist);
  margin: 0;
}

/* ---- Navigation pill ---- */

.nav-wrap {
  position: fixed;
  top: var(--spacing-16);
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  pointer-events: none;
  padding: 0 var(--spacing-16);
}

.nav {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-twilight);
  border-radius: var(--radius-nav);
  padding: 6px;
  box-shadow: var(--shadow-sm);
}

.nav__brand {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-body);
  color: var(--color-graphite);
  padding: 6px 14px;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

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

.nav__link {
  font-size: var(--text-body-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-body-sm);
  color: var(--color-charcoal);
  padding: 8px 12px;
  border-radius: var(--radius-nav);
  line-height: 1;
  white-space: nowrap;
}

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

.nav__link[aria-current="page"] { color: var(--color-terminal-green); }

.nav__cta {
  font-size: var(--text-body-sm);
  font-weight: 500;
  color: var(--color-terminal-green);
  border: 1px solid var(--color-terminal-green);
  border-radius: var(--radius-buttons);
  padding: 7px 12px;
  line-height: 1;
  margin-left: var(--spacing-8);
  white-space: nowrap;
  transition: background 120ms ease-out, color 120ms ease-out, transform 150ms cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

.nav__cta:hover { background: rgba(15, 122, 92, 0.06); color: var(--color-pine); border-color: var(--color-pine); }
.nav__cta:active { transform: scale(0.97); }

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-8);
  font-family: var(--font-sans);
  font-size: var(--text-body-sm);
  font-weight: 500;
  letter-spacing: var(--tracking-body-sm);
  line-height: 1;
  border-radius: var(--radius-buttons);
  padding: 10px 16px;
  background: transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 120ms ease-out, color 120ms ease-out, border-color 120ms ease-out,
              transform 150ms cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

.btn:active { transform: scale(0.97); }

.btn--primary {
  border: 1px solid var(--color-terminal-green);
  color: var(--color-terminal-green);
}
.btn--primary:hover { background: rgba(15, 122, 92, 0.06); color: var(--color-pine); border-color: var(--color-pine); }

.btn--secondary {
  border: 1px solid var(--color-twilight);
  color: var(--color-twilight);
}
.btn--secondary:hover { background: rgba(40, 40, 52, 0.04); color: var(--color-dusk); }

.btn--dark {
  border: 1px solid var(--color-twilight);
  background: var(--color-dusk);
  color: var(--color-paper);
  padding: 12px 18px;
}
.btn--dark:hover { background: var(--color-twilight); color: var(--color-paper); }

.btn__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 11px;
  transition: transform 150ms ease-out;
}

.btn:hover .btn__arrow { transform: translateX(2px); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-charcoal);
  font-weight: 500;
}
.link-arrow:hover { color: var(--color-terminal-green); }
.link-arrow::after { content: "→"; transition: transform 150ms ease-out; }
.link-arrow:hover::after { transform: translateX(3px); }

/* ---- Cards ---- */

.card {
  background: var(--color-paper);
  border: 1px solid var(--color-mist);
  border-radius: var(--radius-cards);
  box-shadow: var(--shadow-subtle);
  padding: var(--spacing-24);
}

.card--interactive {
  transition: border-color 150ms ease-out, transform 200ms cubic-bezier(0.2, 0.8, 0.3, 1.1);
}
.card--interactive:hover {
  border-color: var(--color-fog);
  transform: translateY(-2px);
}

.terminal-card {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--color-mist);
  border-radius: var(--radius-cards-lg);
  box-shadow: var(--shadow-sm-2);
  padding: var(--spacing-12);
  overflow: hidden;
}

.terminal-card__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px 12px;
}

.terminal-card__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--color-fog);
}

.terminal-card__title {
  margin-left: var(--spacing-8);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ash);
}

.terminal-card pre {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-graphite);
  background: var(--color-linen);
  border-radius: var(--radius-buttons);
  padding: var(--spacing-16);
  overflow-x: auto;
  margin: 0;
}

.terminal-card .t-green { color: var(--color-terminal-green); }
.terminal-card .t-red { color: #a04040; }
.terminal-card .t-dim { color: var(--color-ash); }

/* Typing caret — block cursor while the hero terminal types itself */
.terminal-card pre.is-typing::after,
.terminal-card pre.is-typed::after {
  content: "";
  display: inline-block;
  width: 0.6em;
  height: 1em;
  margin-left: 2px;
  vertical-align: text-bottom;
  background: var(--color-terminal-green);
}
.terminal-card pre.is-typed::after {
  animation: caret-blink 1.1s steps(1) infinite;
}
@keyframes caret-blink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .terminal-card pre.is-typing::after,
  .terminal-card pre.is-typed::after { animation: none; }
}

/* ---- Pine feature surface ---- */

.pine {
  background: var(--color-pine);
  border-radius: var(--radius-surface);
  color: var(--color-paper);
  padding: var(--spacing-48);
}

.pine h2, .pine h3 { color: var(--color-paper); }
.pine p { color: rgba(255, 255, 255, 0.82); }
.pine .eyebrow { color: #7fd4b8; }
.pine a:not(.btn) { color: #7fd4b8; }
.pine a:not(.btn):hover { color: #a8e6cf; }

.pine .btn--primary {
  border-color: #7fd4b8;
  color: #7fd4b8;
}
.pine .btn--primary:hover { background: rgba(255, 255, 255, 0.08); color: #a8e6cf; border-color: #a8e6cf; }

@media (min-width: 720px) {
  .pine { padding: var(--spacing-80); }
}

/* ---- Hero ---- */

.hero {
  padding: 160px 0 var(--spacing-80);
}

.hero .split { align-items: start; }

/* ---- Cinematic video hero (homepage only) ---- */

.hero--cinematic {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-top: 200px;
  /* Poster doubles as the reduced-motion / no-video fallback */
  background: #0a0d0a url("/assets/img/hero-poster.jpg") center / cover no-repeat;
}
.hero__video {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}
.hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  /* Darker on the left where the headline sits, lighter over the scene right */
  background:
    linear-gradient(100deg, rgba(6,10,7,0.9) 0%, rgba(6,10,7,0.62) 48%, rgba(6,10,7,0.34) 100%),
    linear-gradient(to bottom, rgba(6,10,7,0.35), rgba(6,10,7,0.7));
}

/* Text flips to light over the video; scoped so other heroes stay editorial */
.hero--cinematic .eyebrow { color: #7fd4b8; }
.hero--cinematic h1 { color: #f6f4ec; }
.hero--cinematic .lead { color: rgba(246,244,236,0.86); }
.hero--cinematic .muted { color: rgba(246,244,236,0.6); }
.hero--cinematic .muted a { color: #7fd4b8; }
.hero--cinematic .btn--primary {
  border-color: #7fd4b8;
  color: #7fd4b8;
}
.hero--cinematic .btn--primary:hover {
  background: rgba(127,212,184,0.12);
  color: #a8e6cf;
  border-color: #a8e6cf;
}
.hero--cinematic .btn--secondary {
  border-color: rgba(246,244,236,0.5);
  color: #f6f4ec;
}
.hero--cinematic .btn--secondary:hover {
  background: rgba(255,255,255,0.08);
  color: #ffffff;
}
.hero--cinematic .link-arrow { color: rgba(246,244,236,0.9); }

@media (prefers-reduced-motion: reduce) {
  .hero__video { display: none; } /* fall back to the poster background */
}
@media (max-width: 900px) {
  .hero--cinematic { padding-top: 150px; }
}

/* ---- Chips / meta rows ---- */

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-8);
}

.chip {
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-caption);
  font-weight: 500;
  color: var(--color-charcoal);
  border: 1px solid var(--color-mist);
  background: var(--color-paper);
  border-radius: var(--radius-nav);
  padding: 6px 12px;
  line-height: 1.3;
}

/* ---- Grids ---- */

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-24); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-24); }

/* ---- Lists ---- */

.prose ul { padding-left: 1.2em; display: grid; gap: var(--spacing-8); }
.prose li::marker { color: var(--color-terminal-green); }

.def-list { display: grid; gap: var(--spacing-12); padding: 0; list-style: none; }
.def-list li { padding-left: var(--spacing-16); border-left: 2px solid var(--color-mist); }

/* ---- Folder gallery (Range builds) ----
   Structural donor: interactive-folder-gallery (React/framer-motion),
   reimplemented per CLAUDE.md: skeleton only, DESIGN.md skin, COPY.md words.
   Un-enhanced fallback = plain grid. */

.folder-gallery:not(.is-enhanced) .folder-gallery__stack {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-24);
}

/* media cards: full-bleed thumbnail, padded body (DESIGN.md: 0px media / 16px text) */
.folder-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.folder-card__body { padding: var(--spacing-16); }
.folder-card--media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top;
  border-bottom: 1px solid var(--color-mist);
}

.folder-gallery:not(.is-enhanced) .folder-gallery__folder,
.folder-gallery:not(.is-enhanced) .folder-gallery__hint { display: none; }

@media (max-width: 900px) {
  .folder-gallery:not(.is-enhanced) .folder-gallery__stack { grid-template-columns: 1fr; }
}

@media (min-width: 901px) {
  .folder-gallery.is-enhanced {
    position: relative;
    min-height: 640px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding-bottom: var(--spacing-24);
  }

  .folder-gallery.is-enhanced .folder-gallery__stack {
    position: absolute;
    inset: 0;
    display: block;
    pointer-events: none;
  }

  .folder-gallery.is-enhanced .folder-card {
    position: absolute;
    bottom: 44px;
    left: 50%;
    width: 224px;
    min-height: 356px;
    margin-left: -112px;
    transform-origin: bottom center;
    transform: translate(calc(var(--offset) * 5px), calc(var(--offset) * -4px))
               rotate(calc(var(--offset) * 2.5deg))
               scale(calc(1 - 0.03 * max(var(--offset), -1 * var(--offset))));
    transition: transform 300ms cubic-bezier(0.25, 1.1, 0.4, 1);
    z-index: calc(10 + var(--i));
  }

  /* hover peek */
  .folder-gallery.is-enhanced:not(.is-open):has(.folder-gallery__folder:hover) .folder-card {
    transform: translate(calc(var(--offset) * 26px), calc(var(--offset) * -9px - 36px))
               rotate(calc(var(--offset) * 7deg))
               scale(calc(1 - 0.03 * max(var(--offset), -1 * var(--offset))));
  }

  .folder-gallery.is-enhanced.is-open .folder-card {
    transform: translate(calc(var(--offset) * 236px), -160px) rotate(0deg) scale(1.02);
    pointer-events: auto;
    z-index: 50;
  }

  .folder-gallery.is-enhanced.is-open .folder-card:hover {
    transform: translate(calc(var(--offset) * 236px), -128px) rotate(0deg) scale(1.06);
    z-index: 100;
    border-color: var(--color-fog);
  }

  .folder-gallery__folder {
    position: relative;
    z-index: 60;
    width: 340px;
    height: 150px;
    background: var(--color-linen);
    border: 1px solid var(--color-mist);
    border-radius: var(--radius-cards-lg);
    box-shadow: var(--shadow-subtle);
    cursor: pointer;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: var(--spacing-24);
    font-family: var(--font-sans);
    transition: transform 250ms cubic-bezier(0.25, 1.1, 0.4, 1), border-color 150ms ease-out;
    transform-origin: bottom center;
  }

  /* folder tab */
  .folder-gallery__folder::before {
    content: "";
    position: absolute;
    top: -12px;
    left: 0;
    width: 120px;
    height: 13px;
    background: var(--color-linen);
    border: 1px solid var(--color-mist);
    border-bottom: none;
    border-radius: var(--radius-buttons) var(--radius-buttons) 0 0;
  }

  .folder-gallery__folder:hover { transform: perspective(600px) rotateX(-10deg) translateY(4px); border-color: var(--color-fog); }
  .folder-gallery__folder:active { transform: perspective(600px) rotateX(-10deg) translateY(6px) scale(0.99); }

  .folder-gallery.is-open .folder-gallery__folder { opacity: 0; pointer-events: none; }

  .folder-gallery__label {
    font-family: var(--font-mono);
    font-size: var(--text-caption);
    color: var(--color-charcoal);
    background: var(--color-paper);
    border: 1px solid var(--color-mist);
    border-radius: var(--radius-buttons);
    padding: 8px 14px;
  }

  .folder-gallery__hint {
    position: absolute;
    bottom: var(--spacing-16);
    font-size: var(--text-caption);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-ash);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 250ms ease-out, transform 250ms ease-out;
    pointer-events: none;
  }

  .folder-gallery.is-open .folder-gallery__hint { opacity: 1; transform: none; pointer-events: auto; }

  .folder-gallery__hint button {
    font: inherit;
    letter-spacing: inherit;
    text-transform: inherit;
    color: var(--color-terminal-green);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .folder-card, .folder-gallery__folder, .folder-gallery__hint { transition: none; }
}

/* ---- Footer ---- */

.footer {
  background: var(--color-paper);
  border-top: 1px solid var(--color-mist);
  padding: var(--spacing-80) 0 var(--spacing-48);
  margin-top: var(--spacing-80);
}

.footer__statement {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-heading-sm);
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--color-graphite);
  max-width: 720px;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-16);
  margin-top: var(--spacing-32);
  font-size: var(--text-body-sm);
}

.footer__links a { color: var(--color-charcoal); }
.footer__links a:hover { color: var(--color-terminal-green); }

.footer__meta {
  margin-top: var(--spacing-32);
  font-size: var(--text-caption);
  color: var(--color-ash);
}

/* ---- Reveal animation ---- */

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 400ms ease-out, transform 400ms cubic-bezier(0.2, 0.8, 0.3, 1);
}

.reveal.is-visible { opacity: 1; transform: none; }

.reveal:nth-child(2) { transition-delay: 60ms; }
.reveal:nth-child(3) { transition-delay: 120ms; }
.reveal:nth-child(4) { transition-delay: 180ms; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn, .card--interactive, .nav__cta { transition: none; }
}

/* ---- Responsive ---- */

@media (max-width: 900px) {
  :root {
    --text-display: 40px;
    --text-heading-lg: 36px;
    --text-heading: 32px;
    --text-heading-sm: 24px;
  }

  .split, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero { padding: 128px 0 var(--spacing-48); }
  .section { padding: var(--spacing-48) 0; }
  .section--roomy { padding: var(--spacing-64) 0; }

  .nav { gap: 0; }
  .nav__brand { display: none; }
  .nav__link { padding: 8px 9px; font-size: 13px; }
  .nav__cta { margin-left: 2px; font-size: 13px; }
}

/* ==========================================================================
   Dark theme (D8) — token overrides only; components stay untouched.
   Warm near-black with the same green-tinted hairline signature.
   ========================================================================== */

[data-theme="dark"] {
  --color-parchment: #121412;
  --color-paper: #191c19;
  --color-linen: #1f231f;
  --color-ink-black: #f4f2ea;
  --color-graphite: #e8e5da;
  --color-charcoal: #c6c3b6;
  --color-ash: #979488;
  --color-fog: #4c504c;
  --color-mist: #2b302b;
  --color-twilight: #a2a2b8;
  --color-dusk: #e8e5da;
  --color-terminal-green: #4dbd94;

  --shadow-sm: rgba(0, 0, 0, 0.5) 0px 2px 6px 0px;
  --shadow-subtle: rgba(0, 0, 0, 0.3) 0px 1px 1px 0px, rgba(0, 0, 0, 0.3) 0px 4px 5px 0px;
  --shadow-sm-2: rgba(0, 0, 0, 0.25) 0px 1px 8px 0px;
}

/* Surfaces that hardcode white glass */
[data-theme="dark"] .nav { background: rgba(22, 25, 22, 0.6); }
[data-theme="dark"] .terminal-card { background: rgba(25, 28, 25, 0.8); }
[data-theme="dark"] .terminal-card .t-red { color: #c96a6a; }

/* Hover tints keyed to light-theme greens */
[data-theme="dark"] .nav__cta:hover,
[data-theme="dark"] .btn--primary:hover {
  background: rgba(127, 212, 184, 0.08);
  color: #a8e6cf;
  border-color: #a8e6cf;
}
[data-theme="dark"] .btn--secondary:hover { background: rgba(255, 255, 255, 0.05); }

/* Pine stays pine — its text must not follow the flipped paper token */
[data-theme="dark"] .pine,
[data-theme="dark"] .pine h2,
[data-theme="dark"] .pine h3 { color: #f6f4ec; }

/* Filled button: dusk flips light, so keep its hover legible */
[data-theme="dark"] .btn--dark { border-color: transparent; }
[data-theme="dark"] .btn--dark:hover { background: var(--color-ink-black); color: var(--color-parchment); }

/* ---- Theme toggle (curtain) ---- */

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-left: var(--spacing-4);
  border: 1px solid var(--color-twilight);
  border-radius: 50%;
  background: transparent;
  color: var(--color-charcoal);
  cursor: pointer;
  flex-shrink: 0;
  transition: color 120ms ease-out, border-color 120ms ease-out, transform 150ms cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

.theme-toggle:hover { color: var(--color-terminal-green); border-color: var(--color-terminal-green); }
.theme-toggle:active { transform: scale(0.94); }

.theme-toggle svg { width: 14px; height: 14px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

.theme-curtain {
  position: fixed;
  inset: 0;
  z-index: 9999;
  transform: scaleY(0);
  transform-origin: top;
  pointer-events: none;
}

.theme-curtain.is-falling,
.theme-curtain.is-rising {
  transition: transform 550ms cubic-bezier(0.76, 0, 0.24, 1);
}

.theme-curtain.is-falling { transform: scaleY(1); }

@media (max-width: 900px) {
  .theme-toggle { width: 28px; height: 28px; margin-left: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  .theme-curtain { display: none; }
}

/* ---- Blog post article (prose) ---- */

.post-header { max-width: 760px; }

.post-hero {
  max-width: 760px;
  border: 1px solid var(--color-mist);
  border-radius: var(--radius-cards);
  overflow: hidden;
  margin-top: var(--spacing-32);
}
.post-hero img { width: 100%; }

.prose {
  max-width: 760px;
}

.prose > * + * { margin-top: var(--spacing-16); }

.prose h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-heading-sm);
  line-height: var(--leading-heading-sm);
  letter-spacing: var(--tracking-heading-sm);
  color: var(--color-graphite);
  margin-top: var(--spacing-48);
}

.prose h3 {
  font-size: var(--text-subheading);
  font-weight: 600;
  letter-spacing: var(--tracking-subheading);
  color: var(--color-graphite);
  margin-top: var(--spacing-32);
}

.prose a { color: var(--color-terminal-green); text-decoration: underline; text-underline-offset: 2px; }
.prose a:hover { color: var(--color-pine); }
[data-theme="dark"] .prose a:hover { color: #a8e6cf; }

.prose strong { color: var(--color-graphite); font-weight: 600; }

.prose ol { padding-left: 22px; }
.prose ol li::marker { color: var(--color-ash); }
.prose li + li { margin-top: var(--spacing-8); }

.prose blockquote {
  border-left: 2px solid var(--color-terminal-green);
  padding-left: var(--spacing-16);
  color: var(--color-ash);
}

.prose hr { border: 0; border-top: 1px solid var(--color-mist); margin: var(--spacing-32) 0; }

.prose pre {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-graphite);
  background: var(--color-linen);
  border: 1px solid var(--color-mist);
  border-radius: var(--radius-buttons);
  padding: var(--spacing-16);
  overflow-x: auto;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 13px;
}

.prose :not(pre) > code {
  background: var(--color-linen);
  border: 1px solid var(--color-mist);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 13px;
  color: var(--color-graphite);
}

.prose img {
  border: 1px solid var(--color-mist);
  border-radius: var(--radius-cards);
  margin: var(--spacing-24) auto;
}

.prose table {
  border-collapse: collapse;
  font-size: var(--text-body-sm);
  line-height: 1.5;
  display: block;
  overflow-x: auto;
}
.prose th, .prose td {
  border: 1px solid var(--color-mist);
  padding: var(--spacing-8) var(--spacing-12);
  text-align: left;
}
.prose th { color: var(--color-graphite); font-weight: 600; background: var(--color-linen); }

/* ---- Writing page: filter bar ---- */

.blog-filter {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--spacing-16);
  flex-wrap: wrap;
}

.blog-search {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 240px;
  max-width: 420px;
}
.blog-search__icon {
  position: absolute;
  left: 2px;
  width: 16px;
  height: 16px;
  color: var(--color-ash);
  pointer-events: none;
}
.blog-search__input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: var(--text-body);
  color: var(--color-graphite);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--color-charcoal);
  border-radius: 0;
  padding: var(--spacing-8) var(--spacing-8) var(--spacing-8) var(--spacing-24);
  outline: none;
  transition: border-color 150ms ease;
}
.blog-search__input::placeholder { color: var(--color-ash); }
.blog-search__input:focus { border-bottom-color: var(--color-terminal-green); }
.blog-search__input::-webkit-search-cancel-button { -webkit-appearance: none; }

.blog-count {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--color-ash);
  white-space: nowrap;
}

.blog-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-24);
}
@media (min-width: 640px) { .blog-list { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 940px) { .blog-list { grid-template-columns: repeat(3, 1fr); } }

.blog-empty { padding: var(--spacing-16) 0; }
.blog-clear {
  font: inherit;
  color: var(--color-terminal-green);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.blog-clear:hover { color: var(--color-pine); }
[data-theme="dark"] .blog-clear:hover { color: #a8e6cf; }

/* ---- Writing page: post card ---- */

.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  color: inherit;
  padding: var(--spacing-12);
}
/* display:flex would otherwise beat the [hidden] attribute's display:none */
.post-card[hidden] { display: none; }
/* Title link stretches to make the whole card clickable */
.post-card__link { color: inherit; }
.post-card__link::after { content: ""; position: absolute; inset: 0; }
.post-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--spacing-12) var(--spacing-8) var(--spacing-8);
}
.post-card__meta {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: 0;
  color: var(--color-ash);
  text-transform: uppercase;
}
.post-card__dot::before { content: "·"; margin: 0 6px; color: var(--color-fog); }
.post-card h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-subheading);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--color-graphite);
  margin: var(--spacing-8) 0;
  transition: color 150ms ease;
}
.post-card:hover h2,
.post-card:hover .post-card__link { color: var(--color-terminal-green); }
.post-card__desc {
  color: var(--color-ash);
  font-size: var(--text-body-sm);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
/* Tags sit above the stretched link so they stay clickable */
.post-card__tags { position: relative; z-index: 1; margin-top: auto; padding-top: var(--spacing-12); }

/* Thumbnail: 16:9, skeleton shimmer under a fade-in image */
.post-card__thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--color-mist);
  border-radius: var(--radius-buttons);
  overflow: hidden;
  background: var(--color-linen);
}
.post-card__thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-linen);
  animation: skeleton-pulse 1.4s ease-in-out infinite;
}
.post-card__thumb.is-loaded::before { display: none; }
.post-card__thumb img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 600ms ease, transform 500ms ease;
}
.post-card__thumb.is-loaded img { opacity: 1; }
.post-card:hover .post-card__thumb img { transform: scale(1.04); }

@keyframes skeleton-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}
@media (prefers-reduced-motion: reduce) {
  .post-card__thumb::before { animation: none; }
  .post-card__thumb img { transition: opacity 200ms ease; }
  .post-card:hover .post-card__thumb img { transform: none; }
}

/* Interactive tag chips double as filters */
.chip--tag {
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  transition: color 150ms ease, border-color 150ms ease, background 150ms ease;
}
.chip--tag::before { content: "#"; color: var(--color-fog); }
.chip--tag:hover {
  color: var(--color-terminal-green);
  border-color: var(--color-terminal-green);
}
.chip--tag[aria-pressed="true"] {
  color: var(--color-terminal-green);
  border-color: var(--color-terminal-green);
  background: rgba(15, 122, 92, 0.06);
}
[data-theme="dark"] .chip--tag[aria-pressed="true"] { background: rgba(77, 189, 148, 0.1); }

/* ============================================================
   Social dock — fixed bottom-center, pointer-magnify on hover.
   Vanilla port of the framer-motion Dock. DESIGN.md tokens.
   ============================================================ */
.dock-wrap {
  position: fixed;
  left: 50%;
  bottom: var(--spacing-24);
  transform: translateX(-50%);
  z-index: 50;
  pointer-events: none;
}
.dock {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-8);
  height: 58px;
  padding: var(--spacing-8);
  border: 1px solid var(--color-twilight);
  border-radius: var(--radius-cards-lg);
  background: color-mix(in srgb, var(--color-linen) 72%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  pointer-events: auto;
}
.dock__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: 999px;
  color: var(--color-twilight);
  transition: color 0.15s ease, width 0.12s ease, height 0.12s ease;
}
.dock__icon:hover { color: var(--color-terminal-green); }
.dock__icon svg { width: 22px; height: 22px; }
.dock__icon:focus-visible {
  outline: 2px solid var(--color-terminal-green);
  outline-offset: 2px;
}
:root[data-theme="dark"] .dock {
  background: color-mix(in srgb, var(--color-twilight) 55%, transparent);
  border-color: var(--color-fog);
}
@media (prefers-reduced-motion: reduce) {
  .dock__icon { transition: color 0.15s ease; }
}