/* Site-wide foundation: colour and type tokens, the shared header and
   footer, and base controls. Every page loads this first.
   Look: quiet neutral surfaces, soft rounded cards, one saffron accent. */
:root {
  --paper: #f4f5f7;      /* page background */
  --sheet: #ffffff;      /* cards and panels */
  --field: #fbfbfc;      /* inputs */
  --ink: #111827;
  --muted: #5f6b7a;
  --rule: #e3e6eb;
  --route: #c2410c;      /* accent (saffron) */
  --route-soft: rgba(194, 65, 12, 0.08);
  --ok: #15803d;
  --ok-soft: rgba(21, 128, 61, 0.09);
  --err: #b42318;
  --grid: transparent;
  --header-bg: rgba(244, 245, 247, 0.82);
  --shadow: 0 1px 2px rgba(17, 24, 39, 0.04), 0 8px 24px rgba(17, 24, 39, 0.05);
  --shadow-lg: 0 2px 4px rgba(17, 24, 39, 0.05), 0 18px 48px rgba(17, 24, 39, 0.10);
  --radius: 16px;
  --radius-sm: 10px;

  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0b0e13; --sheet: #12161d; --field: #0e1218; --ink: #e7eaf0; --muted: #9aa4b2;
    --rule: #242b36; --route: #ff8a4c; --route-soft: rgba(255, 138, 76, 0.12);
    --ok: #4ade80; --ok-soft: rgba(74, 222, 128, 0.10); --err: #f87171;
    --header-bg: rgba(11, 14, 19, 0.78);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.4), 0 18px 48px rgba(0, 0, 0, 0.45);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0b0e13; --sheet: #12161d; --field: #0e1218; --ink: #e7eaf0; --muted: #9aa4b2;
  --rule: #242b36; --route: #ff8a4c; --route-soft: rgba(255, 138, 76, 0.12);
  --ok: #4ade80; --ok-soft: rgba(74, 222, 128, 0.10); --err: #f87171;
  --header-bg: rgba(11, 14, 19, 0.78);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.4), 0 18px 48px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { padding-block: env(safe-area-inset-top, 0px) env(safe-area-inset-bottom, 0px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font: 400 0.9375rem/1.55 var(--body);
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
img { max-width: 100%; }
a { color: inherit; }
::selection { background: var(--route-soft); }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }

/* Page width and gutter */
.shell { width: 100%; max-width: 1200px; margin: 0 auto; padding-inline: 20px; }
@media (max-width: 480px) { .shell { padding-inline: 16px; } }
main.wrap, .wrap { flex: 1; width: 100%; max-width: 1200px; margin: 0 auto; padding: 28px 20px 56px; display: grid; gap: 24px; align-content: start; }
@media (max-width: 480px) { main.wrap, .wrap { padding-inline: 16px; } }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 30;
  background: var(--header-bg);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--rule);
}
.sh-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 700 1.0625rem/1 var(--display); letter-spacing: -0.01em; white-space: nowrap; min-width: 0; }
@media (max-width: 400px) { .sh-link, .menu > summary { padding-inline: 9px; } .brand { gap: 8px; } }
/* On phones the logo is the way home, which leaves room for the name. */
@media (max-width: 440px) { .sh-nav .sh-link[href="index.html"] { display: none; } }
.brand-mark {
  width: 32px; height: 32px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; flex: none;
  background: var(--ink); color: var(--sheet); font: 800 0.8125rem/1 var(--display); letter-spacing: 0.02em;
}
.brand-mark i { font-style: normal; color: var(--route); }
.sh-nav { display: flex; align-items: center; gap: 4px; }
.sh-link, .menu > summary {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 12px; border-radius: 999px;
  color: var(--muted); text-decoration: none; font: 500 0.875rem/1 var(--body);
  cursor: pointer; list-style: none; user-select: none;
}
.menu > summary::-webkit-details-marker { display: none; }
.sh-link:hover, .menu > summary:hover, .menu[open] > summary { color: var(--ink); background: var(--route-soft); }
.sh-link[aria-current="page"], .menu.current > summary { color: var(--ink); font-weight: 600; }
.menu { position: relative; }
.menu > summary svg { transition: transform 0.15s; }
.menu[open] > summary svg { transform: rotate(180deg); }
.menu-pop {
  position: absolute; right: 0; top: calc(100% + 8px); width: min(320px, calc(100vw - 32px));
  background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--radius); box-shadow: var(--shadow-lg);
  padding: 8px; display: grid; gap: 4px;
}
.menu-pop .label { padding: 6px 10px 2px; }
.menu-item { display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 2px 12px; align-items: center; padding: 10px; border-radius: 12px; text-decoration: none; }
.menu-item:hover, .menu-item:focus-visible { background: var(--route-soft); }
.menu-item .ico { grid-row: span 2; width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; background: var(--route-soft); color: var(--route); font: 800 0.8125rem var(--display); }
.menu-item strong { font-size: 0.9375rem; }
.menu-item span:last-child { font-size: 0.8125rem; color: var(--muted); line-height: 1.35; }
.theme-toggle {
  width: 38px; height: 38px; padding: 0; margin-left: 4px; display: grid; place-items: center;
  border-radius: 999px; border: 1px solid var(--rule); background: var(--sheet); color: var(--ink); cursor: pointer;
}
.theme-toggle:hover { border-color: var(--muted); }
.theme-toggle svg { width: 18px; height: 18px; }

/* Project sub-navigation (second header row) */
.subnav { border-top: 1px solid var(--rule); }
.subnav .sh-row { min-height: 52px; }
.subnav-title { display: inline-flex; align-items: center; gap: 8px; font: 600 0.875rem var(--body); white-space: nowrap; }
.subnav-title .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--route); }
.tabs-nav { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; flex: 1; min-width: 0; padding: 6px 0; }
.tabs-nav::-webkit-scrollbar { display: none; }
.tabs-nav a {
  flex: none; padding: 7px 14px; border-radius: 999px; text-decoration: none; white-space: nowrap;
  color: var(--muted); font: 500 0.875rem/1 var(--body); border: 1px solid transparent;
}
.tabs-nav a:hover { color: var(--ink); background: var(--route-soft); }
.tabs-nav a[aria-current="page"] { color: var(--sheet); background: var(--ink); font-weight: 600; }
.subnav .who { flex: none; }
@media (max-width: 720px) {
  .subnav .sh-row { flex-wrap: wrap; gap: 4px 12px; padding-block: 6px; }
  .subnav-title { display: none; }
  .tabs-nav { order: 2; flex-basis: 100%; }
  .subnav .who { margin-left: auto; }
}
.who { display: flex; align-items: center; gap: 10px; }
.who .label { max-width: 22ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--rule); background: var(--sheet); margin-top: auto; }
.sf-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr)); gap: 24px; padding-block: 32px 20px; }
@media (max-width: 720px) { .sf-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } .sf-about { grid-column: 1 / -1; } }
.sf-about p { margin: 8px 0 0; color: var(--muted); font-size: 0.875rem; max-width: 42ch; }
.sf-col h3 { margin: 0 0 10px; font: 500 0.72rem/1.2 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.sf-col a { display: block; padding: 4px 0; color: var(--ink); text-decoration: none; font-size: 0.875rem; }
.sf-col a:hover { color: var(--route); }
.sf-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding-block: 14px 24px; color: var(--muted); font-size: 0.8125rem; background: linear-gradient(var(--rule), var(--rule)) no-repeat top / calc(100% - 40px) 1px; }
@media (max-width: 480px) { .sf-base { background-size: calc(100% - 32px) 1px; } }
.sf-base a { color: var(--muted); }

/* ---------- Page heading ---------- */
.page-head { display: grid; gap: 6px; }
.eyebrow { font: 500 0.75rem/1.2 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--route); }
.page-head h1 { margin: 0; font: 800 clamp(1.875rem, 4.5vw, 2.75rem)/1.05 var(--display); letter-spacing: -0.03em; text-wrap: balance; }
.page-head p { margin: 0; color: var(--muted); max-width: 62ch; }

/* ---------- Base controls ---------- */
.label { font: 500 0.72rem/1.2 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.panel {
  background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 22px; display: grid; gap: 16px; min-width: 0;
}
@media (max-width: 480px) { .panel { padding: 18px 16px; } }
.panel h2 { margin: 0; font: 700 1.25rem/1.2 var(--display); letter-spacing: -0.01em; }
.field { display: grid; gap: 6px; }
.hint { font-size: 0.8125rem; color: var(--muted); margin: 0; }
input, select, button, textarea { font: inherit; color: inherit; }
input, select, textarea {
  width: 100%; min-width: 0; padding: 10px 12px;
  background: var(--field); border: 1px solid var(--rule); border-radius: var(--radius-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:hover, select:hover, textarea:hover { border-color: color-mix(in srgb, var(--muted) 45%, var(--rule)); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--route); box-shadow: 0 0 0 3px var(--route-soft); }
input[type="checkbox"], input[type="radio"] { width: auto; accent-color: var(--route); }
@supports (-webkit-touch-callout: none) {
  input[type="date"], input[type="datetime-local"], input[type="time"] { -webkit-appearance: none; appearance: none; min-height: 44px; display: block; }
}
:focus-visible { outline: 2px solid var(--route); outline-offset: 2px; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: none; }

button {
  cursor: pointer; border: 1px solid var(--ink); background: var(--ink); color: var(--sheet);
  padding: 10px 18px; border-radius: var(--radius-sm); font-weight: 600;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.05s;
}
button:active:not(:disabled) { transform: translateY(1px); }
button.ghost { background: var(--sheet); color: var(--ink); border-color: var(--rule); }
button.ghost:hover:not(:disabled) { border-color: color-mix(in srgb, var(--muted) 55%, var(--rule)); }
button.small { padding: 5px 11px; font-size: 0.8125rem; border-radius: 8px; }
button.accent { background: var(--route); border-color: var(--route); color: #fff; }
:root[data-theme="dark"] button.accent { color: #1a0d05; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) button.accent { color: #1a0d05; } }
button.accent:hover:not(:disabled) { filter: brightness(1.06); }
button:disabled { opacity: 0.5; cursor: default; }
.msg { margin: 0; padding: 10px 14px; border: 1px solid; border-radius: var(--radius-sm); font-size: 0.875rem; }
.msg.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, transparent); background: var(--ok-soft); }
.msg.err { color: var(--err); border-color: color-mix(in srgb, var(--err) 40%, transparent); background: color-mix(in srgb, var(--err) 7%, transparent); }