/* Personal Site design system: dark first, light second. Tokens are CSS custom properties.
   Dark values sit on :root; light values apply by system setting and by [data-theme="light"].
   Fonts are self-hosted in /fonts (SIL Open Font License; licences sit beside the files). */

@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 500; font-display: swap; src: url("/fonts/space-grotesk-latin-500.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 600; font-display: swap; src: url("/fonts/space-grotesk-latin-600.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-style: normal; font-weight: 700; font-display: swap; src: url("/fonts/space-grotesk-latin-700.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 400; font-display: swap; src: url("/fonts/inter-latin-400.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 500; font-display: swap; src: url("/fonts/inter-latin-500.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-style: normal; font-weight: 600; font-display: swap; src: url("/fonts/inter-latin-600.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("/fonts/jetbrains-mono-latin-400.woff2") format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("/fonts/jetbrains-mono-latin-500.woff2") format("woff2"); }

:root {
  color-scheme: dark;

  --surface-100: #07090d;
  --surface-200: #0d1117;
  --surface-300: #151b24;
  --line: #1f2a37;
  --line-strong: #33445a;
  --ink: #e6edf3;
  --ink-muted: #8b98a9;
  --accent: #38e1ff;
  --accent-ink: #031318;
  --accent-soft: rgba(56, 225, 255, 0.12);
  --accent-2: #5ff5c8;
  --accent-3: #5b9bff;
  --accent-3-soft: rgba(91, 155, 255, 0.14);
  --ok: #a3e635;
  --warn: #fbbf24;
  --danger: #ff6b6b;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-16: 64px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --glow-accent: 0 0 0 1px rgba(56, 225, 255, 0.35), 0 0 24px rgba(56, 225, 255, 0.18);
  --focus-ring: 0 0 0 2px #07090d, 0 0 0 4px #38e1ff;

  --font-display: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --gutter: var(--space-4);
  --content: 1120px;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --surface-100: #f4f6f9;
    --surface-200: #ffffff;
    --surface-300: #e9edf3;
    --line: #d5dce6;
    --line-strong: #a9b5c4;
    --ink: #0b1220;
    --ink-muted: #4b5668;
    --accent: #0e7490;
    --accent-ink: #ffffff;
    --accent-soft: rgba(14, 116, 144, 0.1);
    --accent-2: #0f766e;
    --accent-3: #1d4ed8;
    --accent-3-soft: rgba(29, 78, 216, 0.08);
    --ok: #4d7c0f;
    --warn: #b45309;
    --danger: #b91c1c;
    --glow-accent: none;
    --focus-ring: 0 0 0 2px #f4f6f9, 0 0 0 4px #0e7490;
  }
}

:root[data-theme="light"] {
  color-scheme: light;
  --surface-100: #f4f6f9;
  --surface-200: #ffffff;
  --surface-300: #e9edf3;
  --line: #d5dce6;
  --line-strong: #a9b5c4;
  --ink: #0b1220;
  --ink-muted: #4b5668;
  --accent: #0e7490;
  --accent-ink: #ffffff;
  --accent-soft: rgba(14, 116, 144, 0.1);
  --accent-2: #0f766e;
  --accent-3: #1d4ed8;
  --accent-3-soft: rgba(29, 78, 216, 0.08);
  --ok: #4d7c0f;
  --warn: #b45309;
  --danger: #b91c1c;
  --glow-accent: none;
  --focus-ring: 0 0 0 2px #f4f6f9, 0 0 0 4px #0e7490;
}

@media (min-width: 768px) {
  :root { --gutter: var(--space-8); }
}

/* --- Base --------------------------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

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

body {
  margin: 0;
  background: var(--surface-100);
  color: var(--ink);
  font: 400 16px/24px var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

main,
.site-nav-wrap,
.site-footer {
  width: 100%;
  max-width: calc(var(--content) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main { padding-bottom: var(--space-16); }

h1, h2, h3, h4 { margin: 0; font-family: var(--font-display); color: var(--ink); }
h1 { font-size: 36px; line-height: 42px; font-weight: 700; }
h2 { font-size: 22px; line-height: 28px; font-weight: 600; }
h3 { font-size: 22px; line-height: 28px; font-weight: 600; }
p { margin: 0 0 var(--space-4); }

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

:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: var(--radius-sm); }

img { max-width: 100%; }

.display { font: 700 clamp(40px, 11vw, 56px)/1.07 var(--font-display); }
.lead { margin: 0; max-width: 40rem; color: var(--ink-muted); font-size: 18px; line-height: 28px; }
.small { font-size: 14px; line-height: 20px; }
.muted { color: var(--ink-muted); }
.mono { font-family: var(--font-mono); }
.stat { font: 500 32px/36px var(--font-mono); }
code, kbd, samp { font-family: var(--font-mono); font-size: 14px; line-height: 20px; }

.label {
  font: 500 12px/16px var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* --- Nav ---------------------------------------------------------------------------------- */

.site-nav-wrap {
  position: sticky;
  top: var(--space-4);
  z-index: 20;
  margin-top: var(--space-4);
  padding-block: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  min-height: 48px;
  padding: var(--space-1) var(--space-2) var(--space-1) var(--space-4);
  background: var(--surface-200);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.brand {
  min-width: 0;
  font: 700 20px/28px var(--font-display);
  color: var(--ink);
  white-space: nowrap;
}

.brand:hover { text-decoration: none; }
.dot { color: var(--accent-2); }

.nav-links { display: flex; align-items: center; gap: var(--space-1); }

.nav-links a {
  padding: 6px var(--space-3);
  border-radius: var(--radius-full);
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 20px;
  font-weight: 500;
  white-space: nowrap;
  transition: color 150ms ease-out, background-color 150ms ease-out;
}

.nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-links a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); }
.nav-links a:focus-visible { border-radius: var(--radius-full); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-left: var(--space-1);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--ink-muted);
  cursor: pointer;
  transition: color 150ms ease-out, border-color 150ms ease-out;
}

.theme-toggle:hover { color: var(--accent); border-color: var(--line-strong); }
.theme-toggle:focus-visible { border-radius: var(--radius-full); }
.theme-toggle svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

@media (max-width: 420px) {
  .site-nav { padding-left: var(--space-3); }
  .brand { font-size: 18px; }
  .nav-links a { padding-inline: 7px; } /* four items now (Projects, About, Dashboard, toggle): keep one line at 390px */
  .theme-toggle { margin-left: 0; }
}

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

.site-footer {
  padding-block: var(--space-8);
  border-top: 1px solid var(--line);
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 20px;
}

.site-footer p { margin: 0; }

/* --- Buttons, chips, panels, labels ------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px var(--space-4);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--ink);
  font: 600 14px/20px var(--font-sans);
  cursor: pointer;
  transition: color 150ms ease-out, background-color 150ms ease-out, border-color 150ms ease-out, box-shadow 150ms ease-out;
}

.button:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); }
.button:focus-visible { border-radius: var(--radius-md); }

.button-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.button-primary:hover { background: var(--accent); color: var(--accent-ink); box-shadow: var(--glow-accent); }
.button-primary:focus-visible { box-shadow: var(--focus-ring); }

.button-secondary { background: var(--surface-200); }

.buttons { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-6); }

.chip {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--surface-300);
  color: var(--ink-muted);
  font: 500 12px/16px var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.chip-tag { background: var(--accent-3-soft); color: var(--accent-3); }
.chip-warn { color: var(--warn); background: transparent; box-shadow: inset 0 0 0 1px var(--warn); }

.featured-marker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-2);
  font: 500 12px/16px var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.featured-marker::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--accent-2);
}

.panel {
  padding: var(--space-6);
  background: var(--surface-200);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.section-label {
  margin: 0 0 var(--space-2);
  color: var(--ink-muted);
  font: 500 12px/16px var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* The background grid: edge to edge behind the top of every page, fading out slowly downwards.
   It sits on <body>, so it always spans the full window width; the fade is measured in px from the
   top, so long and short pages fade the same way and the grid never makes a page taller. */
body { position: relative; isolation: isolate; min-height: 100vh; }

body::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-strong) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center top;
  -webkit-mask-image: linear-gradient(to bottom, #000 0, rgba(0, 0, 0, 0.75) 400px, rgba(0, 0, 0, 0.35) 900px, transparent 1400px);
  mask-image: linear-gradient(to bottom, #000 0, rgba(0, 0, 0, 0.75) 400px, rgba(0, 0, 0, 0.35) 900px, transparent 1400px);
}

/* A gentle pulse: the grid (drawn in line-strong) brightens and dims every 3.5 seconds, smoothly.
   At its brightest it is a little stronger than a plain line-colour grid, at its dimmest a little
   fainter. Off under reduced motion (see the prefers-reduced-motion rule at the end). */
body::before { opacity: 0.85; animation: grid-pulse 3.5s ease-in-out infinite alternate; }

@keyframes grid-pulse {
  from { opacity: 0.85; }
  to { opacity: 0.25; }
}

/* Kept so older markup with class="grid-bg" still works; the grid itself is on body now. */
.grid-bg { position: relative; }

/* --- Homepage and page tops --------------------------------------------------------------- */

.hero { padding: var(--space-16) 0 var(--space-8); }
.hero h1 { font-size: clamp(40px, 11vw, 56px); line-height: 1.07; }
.hero .lead { margin-top: var(--space-4); }
.hero-compact { padding: var(--space-16) 0 var(--space-6); }

.prompt { font-family: var(--font-mono); color: var(--accent); }

.cursor {
  display: inline-block;
  width: 0.55em;
  height: 1.05em;
  margin-left: 4px;
  vertical-align: text-bottom;
  background: var(--accent);
  animation: blink 1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.section { margin-top: var(--space-16); }
.hero + .section { margin-top: var(--space-8); }
.hero-compact + .section { margin-top: 0; }
.section > h2 { margin-bottom: var(--space-6); }
.all-link { margin: var(--space-6) 0 0; font-weight: 600; }

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

.cards { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }

@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .cards { grid-template-columns: repeat(3, 1fr); } }

.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
  overflow: hidden;
  padding: var(--space-6);
  background: var(--surface-200);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  color: var(--ink);
  transition: border-color 150ms ease-out, box-shadow 150ms ease-out;
}

.card p { margin: 0; color: var(--ink-muted); font-size: 14px; line-height: 20px; }
.card-link:hover { text-decoration: none; border-color: var(--line-strong); box-shadow: var(--glow-accent); }
.card-link:focus-visible { border-radius: var(--radius-lg); border-color: var(--line-strong); box-shadow: var(--focus-ring); }
.card-pending { border-style: dashed; }

.card-image {
  display: block;
  width: calc(100% + 2 * var(--space-6));
  max-width: none;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin: calc(-1 * var(--space-6)) calc(-1 * var(--space-6)) var(--space-2);
}

.card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }

.card-updated,
.card-cta {
  margin-top: auto;
  padding-top: var(--space-2);
  color: var(--ink-muted);
  font: 500 12px/16px var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card-cta { color: var(--accent); }
.card-cta-muted { color: var(--ink-muted); }

.tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: 0; padding: 0; list-style: none; }
.project-card .tags { margin-top: var(--space-1); }

/* --- Projects page: filter pills ---------------------------------------------------------- */

.filters { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: 0 0 var(--space-6); }

.filters button {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--ink);
  font: 500 12px/16px var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color 150ms ease-out, background-color 150ms ease-out, border-color 150ms ease-out;
}

.filters button:hover { border-color: var(--line-strong); }
.filters button:focus-visible { border-radius: var(--radius-full); }
.filters button[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.filters .count { color: var(--ink-muted); font-variant-numeric: tabular-nums; }

/* --- Project pages ------------------------------------------------------------------------ */

.project { padding: var(--space-16) 0 0; }
.project-header { padding-bottom: var(--space-6); }
.eyebrow { margin: 0 0 var(--space-3); }
.eyebrow a { color: var(--ink-muted); }
.eyebrow a:hover { color: var(--accent); text-decoration: none; }
.project-header .lead { margin-top: var(--space-3); }
.project-meta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin-top: var(--space-4); }

.shot { margin: 0 0 var(--space-6); }
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface-200); }
.shot figcaption { margin-top: var(--space-2); color: var(--ink-muted); font-size: 14px; line-height: 20px; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: var(--space-4); margin: var(--space-4) 0 var(--space-6); }
.grid .shot { margin: 0; }

.project-section { margin-top: var(--space-8); }
.project-section > h2 { margin-bottom: var(--space-3); }

.details {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
  gap: var(--space-4);
  margin: 0;
  padding: var(--space-6);
  background: var(--surface-200);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.details dt { margin-bottom: var(--space-1); color: var(--ink-muted); font: 500 12px/16px var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; }
.details dd { margin: 0; overflow-wrap: anywhere; }
.details dd.mono, .details dd time { font-family: var(--font-mono); font-size: 14px; line-height: 20px; }

.prose { max-width: 44rem; margin-top: var(--space-8); overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose h2 { margin: var(--space-8) 0 var(--space-3); }
.prose h3 { margin: var(--space-6) 0 var(--space-2); font-size: 18px; line-height: 28px; }
.prose h4, .prose h5, .prose h6 { margin: var(--space-4) 0 var(--space-2); font-size: 16px; line-height: 24px; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose img { max-width: 100%; height: auto; }
.prose ul, .prose ol { padding-left: var(--space-6); }

.prose blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  border-left: 3px solid var(--line-strong);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--surface-200);
  color: var(--ink-muted);
}

.prose blockquote p { margin: 0; }

.prose code { padding: 2px 6px; border-radius: var(--radius-sm); background: var(--surface-300); }

.prose pre {
  overflow-x: auto;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--surface-300);
}

.prose pre code { padding: 0; background: none; }

.prose table { display: block; overflow-x: auto; border-collapse: collapse; }
.prose th, .prose td { padding: 6px var(--space-3); border: 1px solid var(--line); text-align: left; }

.contributors { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-6); margin: 0; padding: 0; list-style: none; }
.contributors .muted { font-family: var(--font-mono); font-size: 14px; }

.readme { background: var(--surface-200); border: 1px solid var(--line); border-radius: var(--radius-lg); }
.readme summary { padding: var(--space-3) var(--space-6); color: var(--ink); font: 500 12px/16px var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em; cursor: pointer; }
.readme summary:focus-visible { border-radius: var(--radius-lg); }
.readme-body { max-width: none; margin-top: 0; padding: 0 var(--space-6) var(--space-4); }

.back-link { margin: var(--space-8) 0 0; }

.draft-banner {
  margin: var(--space-6) 0 0;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--warn);
  border-radius: var(--radius-md);
  color: var(--warn);
  font-weight: 600;
}

/* --- About page --------------------------------------------------------------------------- */

.about { padding: var(--space-16) 0 0; }
.about-head { display: flex; align-items: center; gap: var(--space-6); }
.about-intro { min-width: 0; }
.about-intro .lead { margin-top: var(--space-2); }

.avatar {
  flex: none;
  display: block;
  width: 96px;
  height: 96px;
  object-fit: cover;
  background: var(--surface-200);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  font: 700 48px/1 var(--font-display);
}

.about-panels { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-4); margin-top: var(--space-8); }
.about-panels > .panel { min-width: 0; }
.about-panels h2 { margin-bottom: var(--space-4); }

@media (min-width: 1024px) {
  .about-panels { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-panels > .panel:only-child { grid-column: 1 / -1; }
}

.currently { display: grid; gap: var(--space-4); margin: 0; padding: 0; list-style: none; }

.currently li { position: relative; padding-left: var(--space-4); overflow-wrap: anywhere; }

.currently li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--accent-2);
}

.currently .label { display: block; margin-bottom: var(--space-1); color: var(--ink-muted); }

.skill-group + .skill-group { margin-top: var(--space-4); }
.skill-group .label { margin-bottom: var(--space-2); color: var(--ink-muted); }
.skill-group .chip { max-width: 100%; overflow-wrap: anywhere; }

/* The dates line right after a job or school heading */
.prose h3 + p {
  margin: calc(-1 * var(--space-1)) 0 var(--space-3);
  color: var(--ink-muted);
  font: 400 14px/20px var(--font-mono);
}

@media (max-width: 420px) {
  .about-head { gap: var(--space-4); }
}

/* --- Motion ------------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}