/* ============================================================
   FabricFile — shared stylesheet
   One file for the whole site. Edit colours here, not per page.
   ============================================================ */

:root{
  --paper:#F5F6F9;
  --card:#FFFFFF;
  --ink:#15171C;
  --ink-soft:#5B6273;
  --rule:#E1E4EC;
  --bluing:#2F35C4;
  --bluing-tint:#EDEEFC;
  --stop:#AF3229;
  --ink-body:#2E3340;
  --ink-faint:#A2A9B8;
  --paper-veil:rgba(245,246,249,.93);
  --maxw:1080px;
  --r:3px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation:none!important;transition:none!important}
}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,sans-serif;
  font-size:17px;line-height:1.62;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
a{color:var(--bluing)}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--ink);color:#fff;padding:10px 14px;z-index:99}
:focus-visible{outline:2.5px solid var(--bluing);outline-offset:3px}

h1,h2,h3,.eyebrow,.tag-caption{
  font-family:Archivo,system-ui,sans-serif;
  font-variation-settings:"wdth" 118;
  text-transform:uppercase;
}
h1{font-weight:800;font-size:clamp(2.1rem,6.2vw,3.9rem);line-height:.98;letter-spacing:-.015em;margin:0 0 18px}
h2{font-weight:700;font-size:clamp(1.35rem,3.4vw,1.85rem);line-height:1.06;letter-spacing:-.005em;margin:0}
h3{font-weight:600;font-size:.95rem;letter-spacing:.02em;margin:0 0 4px;font-variation-settings:"wdth" 100}
.eyebrow{
  font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.16em;
  color:var(--bluing);font-weight:500;text-transform:uppercase;
}

/* ---------- header / footer ---------- */
.site{
  position:sticky;top:0;z-index:40;background:var(--paper-veil);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);
}
.site .wrap{display:flex;align-items:center;justify-content:space-between;height:56px;gap:16px}
.mark{
  font-family:Archivo,sans-serif;font-variation-settings:"wdth" 125;font-weight:800;
  text-transform:uppercase;font-size:.86rem;letter-spacing:.03em;text-decoration:none;color:var(--ink);
}
.mark span{color:var(--bluing)}
.site nav{display:flex;gap:20px;font-size:.8rem;font-family:"IBM Plex Mono",monospace}
.site nav a{color:var(--ink-soft);text-decoration:none}
.site nav a:hover{color:var(--bluing)}
@media(max-width:700px){.site nav{display:none}}
/* Let table cells wrap on phones — nowrap on a 3-column table can push the page sideways */
@media(max-width:700px){
  table.data td:first-child{white-space:normal}
  table.data{font-size:.84rem}
}

footer{border-top:1px solid var(--rule);padding:36px 0 60px;margin-top:40px;font-size:.85rem;color:var(--ink-soft)}
footer nav{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:16px;font-family:"IBM Plex Mono",monospace;font-size:.75rem}
footer p{max-width:70ch;margin:0 0 10px}

/* ---------- hero (home) ---------- */
.hero{padding:56px 0 40px;border-bottom:1px solid var(--rule)}
.hero .lede{font-size:1.12rem;color:var(--ink-soft);max-width:52ch;margin:0 0 34px}

.tag{
  background:var(--card);border:1px solid var(--rule);
  border-radius:var(--r);padding:26px 20px 20px;max-width:640px;
  box-shadow:0 1px 0 rgba(21,23,28,.04),0 14px 34px -22px rgba(21,23,28,.4);
  position:relative;
}
.tag::before,.tag::after{
  content:"";position:absolute;left:0;right:0;height:7px;
  background:repeating-linear-gradient(90deg,var(--rule) 0 5px,transparent 5px 11px);
}
.tag::before{top:9px}
.tag::after{bottom:9px}
.tag-inner{display:flex;justify-content:space-between;gap:6px}
.tag-btn{
  flex:1;background:none;border:0;padding:8px 2px 6px;cursor:pointer;
  border-radius:var(--r);color:var(--ink);font:inherit;
  display:flex;flex-direction:column;align-items:center;gap:7px;
  transition:transform .18s ease,background .18s ease;
}
.tag-btn:hover{background:var(--bluing-tint);transform:translateY(-3px)}
.tag-btn svg{width:38px;height:38px}
.tag-btn small{
  font-family:"IBM Plex Mono",monospace;font-size:.6rem;letter-spacing:.09em;
  text-transform:uppercase;color:var(--ink-soft);
}
.tag-caption{
  font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.12em;
  color:var(--ink-soft);margin:12px 0 0;text-align:center;
}

/* ---------- grammar strip ---------- */
.grammar{padding:44px 0;border-bottom:1px solid var(--rule)}
.grammar-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:22px}
.gram{background:var(--card);padding:20px}
.gram p{margin:0;font-size:.9rem;color:var(--ink-soft)}
.gram b{display:block;font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--bluing);margin-bottom:6px}

/* ---------- search ---------- */
.finder{position:sticky;top:56px;z-index:30;background:var(--paper);padding:14px 0;border-bottom:1px solid var(--rule)}
.finder input{
  width:100%;padding:13px 15px;font:inherit;font-size:1rem;
  border:1px solid var(--rule);border-radius:var(--r);background:var(--card);color:var(--ink);
}
.finder input::placeholder{color:var(--ink-faint)}
.finder p{margin:8px 0 0;font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--ink-soft)}

/* ---------- symbol sections ---------- */
.sec{padding:52px 0 8px;scroll-margin-top:120px}
.sec-head{display:flex;align-items:flex-start;gap:16px;margin-bottom:6px}
.sec-head svg{width:44px;height:44px;flex:none;margin-top:2px}
.sec-head p{margin:6px 0 0;color:var(--ink-soft);font-size:.95rem;max-width:60ch}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:26px}
.card{background:var(--card);padding:20px;display:flex;gap:16px;align-items:flex-start}
.card svg{width:56px;height:56px;flex:none}
.card p{margin:0;font-size:.87rem;color:var(--ink-soft);line-height:1.5}
.card.stop h3{color:var(--stop)}
.hidden{display:none}

.sym{stroke:var(--ink);stroke-width:2.1;fill:none;stroke-linejoin:round;stroke-linecap:round;overflow:visible}
.sym text{fill:var(--ink);stroke:none;font-family:"IBM Plex Sans",sans-serif;font-weight:600;font-size:15px;text-anchor:middle}
.sym .dot{fill:var(--ink);stroke:none}
.sym .solid{fill:var(--ink)}
.sym .x{stroke:var(--stop);stroke-width:2.6}

/* ---------- prose / inner pages ---------- */
.prose{padding:52px 0;border-top:1px solid var(--rule);margin-top:52px}
.prose h2{margin-bottom:20px}
.prose p{max-width:66ch;color:var(--ink-body)}
.qa{border-top:1px solid var(--rule);padding:20px 0;max-width:70ch}
.qa h3{font-variation-settings:"wdth" 100;font-size:1rem;text-transform:none;letter-spacing:0;margin-bottom:6px}
.qa p{margin:0;font-size:.94rem;color:var(--ink-soft)}

.page{padding:52px 0 20px;max-width:70ch}
.page h1{font-size:clamp(1.9rem,5vw,3rem);margin-bottom:14px}
.page h2{font-size:clamp(1.1rem,2.6vw,1.35rem);margin:38px 0 12px}
.page h3{
  font-variation-settings:"wdth" 100;font-size:1rem;text-transform:none;
  letter-spacing:0;margin:26px 0 6px;
}
.page p,.page li{color:var(--ink-body)}
.page ul,.page ol{padding-left:20px}
.page li{margin-bottom:8px}
.page .lede{font-size:1.1rem;color:var(--ink-soft);margin-bottom:6px}
.updated{
  font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-soft);margin:0 0 34px;
}
.callout{
  background:var(--bluing-tint);border-left:3px solid var(--bluing);
  padding:16px 18px;margin:24px 0;border-radius:0 var(--r) var(--r) 0;
}
.callout p{margin:0;font-size:.92rem}

.page blockquote{margin:22px 0;padding:2px 0 2px 18px;border-left:3px solid var(--rule)}
.page blockquote p{
  margin:0;font-family:"IBM Plex Mono",monospace;
  font-size:.86rem;line-height:1.7;color:var(--ink-soft);
}
.mail{
  display:inline-block;font-family:"IBM Plex Mono",monospace;font-size:1.02rem;
  background:var(--card);border:1px solid var(--rule);border-radius:var(--r);
  padding:12px 16px;margin:6px 0 4px;text-decoration:none;
}
.mail:hover{border-color:var(--bluing)}

table{border-collapse:collapse;width:100%;max-width:560px;margin-top:18px;font-size:.9rem}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft)}
table.data td:first-child{font-family:"IBM Plex Mono",monospace;white-space:nowrap}

/* ---------- ad slots ---------- */
.ad{
  margin:44px auto;max-width:728px;min-height:96px;
  border:1px dashed var(--rule);border-radius:var(--r);
  display:flex;align-items:center;justify-content:center;
  font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-faint);
}

/* ============================================================
   Dark theme.
   Default follows the operating system; the header button
   overrides it and the choice is remembered on the device.
   ============================================================ */
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#0F1116;
    --paper-veil:rgba(15,17,22,.93);
    --card:#171A21;
    --ink:#E7EAF0;
    --ink-body:#C9CEDA;
    --ink-soft:#949BAB;
    --ink-faint:#5E6577;
    --rule:#272B34;
    --bluing:#949BFF;
    --bluing-tint:#1B1F33;
    --stop:#E38178;
  }
}
:root[data-theme="dark"]{
  --paper:#0F1116;
  --paper-veil:rgba(15,17,22,.93);
  --card:#171A21;
  --ink:#E7EAF0;
  --ink-body:#C9CEDA;
  --ink-soft:#949BAB;
  --ink-faint:#5E6577;
  --rule:#272B34;
  --bluing:#949BFF;
  --bluing-tint:#1B1F33;
  --stop:#E38178;
}

/* header controls */
.site-right{display:flex;align-items:center;gap:18px}
.theme-btn{
  width:32px;height:32px;flex:none;padding:0;cursor:pointer;
  background:none;border:1px solid var(--rule);border-radius:var(--r);
  color:var(--ink-soft);display:grid;place-items:center;
  transition:color .18s ease,border-color .18s ease;
}
.theme-btn:hover{color:var(--bluing);border-color:var(--bluing)}
.theme-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.9;
  stroke-linecap:round;stroke-linejoin:round}
.theme-btn .moon{display:none}
:root[data-theme="dark"] .theme-btn .sun{display:none}
:root[data-theme="dark"] .theme-btn .moon{display:block}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) .theme-btn .sun{display:none}
  :root:not([data-theme="light"]) .theme-btn .moon{display:block}
}