/* ==========================================================
   CausifyMarket — shared styles (tokens, menu, header, footer)
   ========================================================== */

:root {
  color-scheme: light;
  --bg: #ffffff;
  --ink: #000000;
  --faint: rgba(0, 0, 0, 0.14);
  --soft: rgba(0, 0, 0, 0.5);
  --line: rgba(0, 0, 0, 0.14);
  --hover: #f5f5f5;
  --scrim: rgba(255, 255, 255, 0.78);
  --sk: #efefef;
  --sk-hi: #f8f8f8;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
}

/* Night mode: follows the system until the visitor picks a theme from the menu */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0b0b0b;
    --ink: #ececec;
    --faint: rgba(255, 255, 255, 0.16);
    --soft: rgba(255, 255, 255, 0.5);
    --line: rgba(255, 255, 255, 0.16);
    --hover: #181818;
    --scrim: rgba(0, 0, 0, 0.72);
    --sk: #1a1a1a;
    --sk-hi: #272727;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b0b0b;
  --ink: #ececec;
  --faint: rgba(255, 255, 255, 0.16);
  --soft: rgba(255, 255, 255, 0.5);
  --line: rgba(255, 255, 255, 0.16);
  --hover: #181818;
  --scrim: rgba(0, 0, 0, 0.72);
  --sk: #1a1a1a;
  --sk-hi: #272727;
}

/* Theme switch: the new theme grows as a circle (see CausifyTheme in menu.js) */
::view-transition-old(root),
::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-new(root) { z-index: 1; }

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

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  -webkit-font-smoothing: antialiased;
}

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

[hidden] { display: none !important; }

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---------- Header ---------- */
.site-head {
  display: flex;
  align-items: center;
  min-height: 72px;
  padding-inline: 20px;
}
.site-mark {
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
  padding: 8px 10px;
  margin-left: -10px;
}
.site-mark:hover, .site-mark:focus-visible { background: var(--ink); color: var(--bg); outline: none; }

/* ---------- Menu trigger ---------- */
.menu-trigger {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 5;
  padding: 8px 10px;
  border: 0;
  background: var(--bg);
  color: var(--ink);
  font: 500 0.9rem/1 var(--mono);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 1200ms ease;
}
.menu-trigger.visible { opacity: 1; pointer-events: auto; }
.menu-trigger .key {
  display: inline-block;
  margin-left: 10px;
  padding: 2px 6px;
  border: 1px solid var(--ink);
  font-size: 0.75rem;
}
.menu-trigger:hover .label,
.menu-trigger:focus-visible .label { background: var(--ink); color: var(--bg); }
.menu-trigger:focus-visible { outline: none; }

/* ---------- Terminal menu ---------- */
.terminal {
  position: fixed;
  inset: 0;
  z-index: 10;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 5vw, 64px);
  clip-path: inset(0 0 100% 0);
  visibility: hidden;
  transition: clip-path 260ms cubic-bezier(.7, 0, .2, 1), visibility 0s linear 260ms;
}
.terminal.open {
  clip-path: inset(0 0 0 0);
  visibility: visible;
  transition: clip-path 260ms cubic-bezier(.7, 0, .2, 1), visibility 0s;
}

.term-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.8rem;
  border-bottom: 1.5px solid var(--ink);
  padding-bottom: 12px;
}
.term-close {
  border: 0;
  background: transparent;
  font: inherit;
  color: var(--ink);
  cursor: pointer;
  padding: 0;
}
.term-close:hover, .term-close:focus-visible { text-decoration: underline; outline: none; }

.term-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
  overflow-y: auto;
  padding-block: 24px;
}
.term-cmd { font-size: 0.9rem; margin: 0 0 2rem; min-height: 1.4em; }
.term-cmd .user { opacity: 0.62; }

.entries { list-style: none; margin: 0; padding: 0; }
.entry a {
  display: grid;
  grid-template-columns: 3.2ch 1fr;
  align-items: baseline;
  gap: 0 1.5ch;
  padding: 0.35rem 0;
  color: var(--ink);
  text-decoration: none;
  outline: none;
}
.entry .num { font-size: 0.85rem; opacity: 0.62; }
.entry .name {
  font-weight: 800;
  font-size: clamp(2rem, 7vw, 4.8rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
  width: fit-content;
}
.entry .here {
  grid-column: 2;
  font-size: 0.75rem;
  opacity: 0.62;
}
.entry .desc {
  grid-column: 2;
  font-size: 0.85rem;
  height: 0;
  overflow: hidden;
  opacity: 0;
  transition: opacity 200ms ease, height 200ms ease;
}
.entry.active .name { background: var(--ink); color: var(--bg); }
.entry.active .num { opacity: 1; }
.entry.active .desc { height: 1.6em; opacity: 1; padding-top: 4px; }
.entry.dim { opacity: 0.15; }
.entry.pending { visibility: hidden; }

/* Sub-directory listing: smaller type, two columns when there's room */
.entries.compact { columns: 2 22rem; column-gap: 4rem; }
.entries.compact .entry { break-inside: avoid; }
.entries.compact .name { font-size: clamp(1.4rem, 3.4vw, 2.4rem); }

.term-foot {
  border-top: 1.5px solid var(--ink);
  padding-top: 12px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px 24px;
  font-size: 0.9rem;
}
.prompt { display: flex; align-items: center; flex: 1; min-width: 220px; }
.prompt label { white-space: nowrap; margin-right: 1ch; }
.prompt input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: 500 1rem var(--mono);
  caret-color: var(--ink);
  outline: none;
  padding: 4px 0;
}
.hints { font-size: 0.75rem; opacity: 0.62; }
.feedback { font-size: 0.8rem; min-height: 1.2em; margin: 1.5rem 0 0; }

/* ---------- Document pages (about, methodology, ...) ---------- */
.page { max-width: 1120px; margin: 0 auto; padding-inline: 20px; }

.hero {
  padding-block: clamp(56px, 11vh, 128px) clamp(48px, 8vh, 88px);
  border-bottom: 1.5px solid var(--ink);
}
.crumb { font-size: 0.85rem; margin: 0 0 1.5rem; }
.crumb .user { opacity: 0.62; }
.hero h1 {
  margin: 0;
  font-weight: 800;
  font-size: clamp(2.5rem, 8.2vw, 6.5rem);
  letter-spacing: -0.045em;
  line-height: 0.95;
}
.lead {
  font-family: var(--serif);
  font-size: clamp(1.2rem, 2.3vw, 1.6rem);
  line-height: 1.45;
  max-width: 34em;
  margin: 2.25rem 0 0;
}

.layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 72px;
  padding-block: 72px 112px;
}
.toc {
  position: sticky;
  top: 88px;
  align-self: start;
  font-size: 0.85rem;
}
.toc p { margin: 0 0 14px; opacity: 0.62; }
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc a {
  display: grid;
  grid-template-columns: 3ch 1fr;
  gap: 1ch;
  padding: 5px 0;
  color: var(--ink);
  text-decoration: none;
  opacity: 0.62;
  transition: opacity 160ms ease;
}
.toc a:hover, .toc a:focus-visible, .toc a.current { opacity: 1; outline: none; }
.toc a.current .t { background: var(--ink); color: var(--bg); }

.content { max-width: 68ch; }

.content section { margin-bottom: 80px; scroll-margin-top: 32px; }
.content section:last-child { margin-bottom: 0; }
.sec-head {
  display: flex;
  align-items: baseline;
  gap: 1.5ch;
  border-top: 1.5px solid var(--ink);
  padding-top: 16px;
  margin-bottom: 1.5rem;
}
.sec-num { font-size: 0.85rem; opacity: 0.62; }
.content h2 {
  margin: 0;
  font-size: clamp(1.55rem, 3.2vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}
.content h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.prose p, .prose li {
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.7;
}
.prose p { margin: 0 0 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { font-weight: 600; }

/* Numbered list with hairlines */
.points { list-style: none; margin: 1.25rem 0 0; padding: 0; counter-reset: pt; }
.points li {
  display: grid;
  grid-template-columns: 4ch 1fr;
  padding: 14px 0;
  border-top: 1px solid var(--faint);
  counter-increment: pt;
}
.points li:last-child { border-bottom: 1px solid var(--faint); }
.points li::before {
  content: "[" counter(pt) "]";
  font-family: var(--mono);
  font-size: 0.8rem;
  padding-top: 0.35em;
}
.points .term {
  display: block;
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 800;
  margin-bottom: 2px;
}

/* Bordered notice box */
.notice { border: 1.5px solid var(--ink); padding: clamp(20px, 3vw, 32px); margin-top: 1.5rem; }
.notice-label {
  display: inline-block;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 8px;
  margin-bottom: 16px;
}

.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0 0 1.5rem; padding: 0; }
.tags li { border: 1.5px solid var(--ink); padding: 6px 10px; font-size: 0.85rem; }

.mail {
  display: inline-block;
  margin-top: 0.75rem;
  font-weight: 800;
  font-size: clamp(1.25rem, 4vw, 2.4rem);
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 3px solid var(--ink);
  overflow-wrap: anywhere;
}
.mail:hover, .mail:focus-visible { background: var(--ink); color: var(--bg); outline: none; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; gap: 0; padding-block: 56px 88px; }
  .toc { display: none; }
}

/* ---------- Footer ---------- */
.site-foot {
  border-top: 1.5px solid var(--ink);
  padding: 56px 20px 28px;
  font-size: 0.875rem;
}
.foot-grid {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 40px 32px;
}
.foot-mark {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}
.foot-brand p { margin: 12px 0 0; line-height: 1.6; }
.foot-tools { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.site-foot .foot-btn {
  display: inline-block;
  border: 1px solid var(--ink);
  background: var(--bg);
  color: var(--ink);
  font: 500 0.75rem var(--mono);
  padding: 6px 10px;
  cursor: pointer;
  text-decoration: none;
}
.site-foot .foot-btn:hover, .site-foot .foot-btn:focus-visible { background: var(--ink); color: var(--bg); text-decoration: none; outline: none; }
.site-foot a[aria-current="page"] { text-decoration: underline; text-underline-offset: 3px; font-weight: 800; }
.site-foot h3 {
  margin: 0 0 14px;
  font-size: 0.75rem;
  font-weight: 500;
  opacity: 0.62;
}
.site-foot ul { list-style: none; margin: 0; padding: 0; }
.site-foot li + li { margin-top: 8px; }
.site-foot a { color: var(--ink); text-decoration: none; }
.site-foot a:hover, .site-foot a:focus-visible { text-decoration: underline; outline: none; }
.foot-bottom {
  max-width: 1120px;
  margin: 56px auto 0;
  padding-top: 16px;
  border-top: 1px solid var(--faint);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 0.8rem;
}

@media (max-width: 760px) {
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .foot-brand { grid-column: 1 / -1; }
}