/* ============================================================================
   annakriuchkova.com - design system (rebuilt 2026-11-14)
   Warm paper, ink, teal + amber. Display serif for headlines (self-hosted,
   Noto Serif Display, OFL license), system sans for reading, mono for labels.
   No outside requests. Light follows the visitor's device; the header button
   switches (in memory only, nothing stored).
============================================================================ */

@font-face { font-family: "NSD"; src: url("fonts/nsd-regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "NSD"; src: url("fonts/nsd-italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "NSD"; src: url("fonts/nsd-bold.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }

/* ------------------------------- tokens --------------------------------- */

:root,
:root[data-theme="light"] {
  --bg:      #f4eee2;   /* warm paper, not white */
  --bg-elev: #fbf7ee;
  --ink:     #22262b;
  --ink-dim: #575c63;
  --teal:    #1c6460;
  --amber:   #8f530b;
  --line:    #dcd2bf;
  --shadow:  #e3c98f;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:      #14181d;
    --bg-elev: #1c2128;
    --ink:     #ece6d9;
    --ink-dim: #a6abb1;
    --teal:    #74c9c1;
    --amber:   #e0aa52;
    --line:    #2d343d;
    --shadow:  #6b4a14;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg:      #14181d;
  --bg-elev: #1c2128;
  --ink:     #ece6d9;
  --ink-dim: #a6abb1;
  --teal:    #74c9c1;
  --amber:   #e0aa52;
  --line:    #2d343d;
  --shadow:  #6b4a14;
  color-scheme: dark;
}

:root {
  --display: "NSD", "Iowan Old Style", "Charter", Georgia, serif;
  --serif: "Charter", "Bitstream Charter", "Iowan Old Style", "Sitka Text", Cambria, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, "Liberation Mono", monospace;
  --measure: 64ch;
  --pad: clamp(1.25rem, 5vw, 3rem);
  --gap: clamp(4rem, 9vw, 7rem);
}

/* -------------------------------- base ---------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 1.0625rem; line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: underline; text-decoration-color: var(--teal);
    text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
a:hover { color: var(--teal); }
:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; border-radius: 3px; }
::selection { background: var(--teal); color: var(--bg); }

.wrap { max-width: 72rem; margin: 0 auto; padding: 0 var(--pad); }
.skip { position: absolute; left: var(--pad); top: -3rem; z-index: 100; background: var(--teal);
        color: var(--bg); padding: 0.5rem 1rem; border-radius: 0 0 6px 6px; text-decoration: none; }
.skip:focus { top: 0; }

.eyebrow {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--teal);
}
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.12; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.8rem, 4vw, 2.7rem); }
h3 { font-family: var(--serif); font-size: 1.28rem; line-height: 1.25; letter-spacing: 0; }
.lede { font-size: clamp(1.08rem, 1.7vw, 1.22rem); color: var(--ink-dim); max-width: var(--measure); }

/* -------------------------------- header -------------------------------- */

.top {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg); background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.top-in { display: flex; align-items: center; gap: 1.5rem; padding-top: 0.8rem; padding-bottom: 0.8rem; }
.brand { font-family: var(--serif); font-weight: 700; font-size: 1.15rem; text-decoration: none; margin-right: auto; white-space: nowrap; }
.nav ul { display: flex; gap: 1.6rem; list-style: none; padding: 0; }
.nav a { font-size: 0.95rem; text-decoration: none; color: var(--ink-dim); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }
.nav a[aria-current="page"] { text-decoration: underline; text-decoration-color: var(--amber); text-decoration-thickness: 2px; text-underline-offset: 6px; }
.btn-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.75rem; height: 2.75rem; padding: 0; background: none; cursor: pointer;
  border: 1px solid var(--line); border-radius: 8px; color: var(--ink);
}
.btn-icon:hover { border-color: var(--teal); color: var(--teal); }
/* the button shows the theme you would switch TO */
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-moon { display: none; }
  :root:not([data-theme="light"]) .icon-sun { display: block; }
}
.menu-btn { display: none; flex-direction: column; gap: 5px; }
.menu-btn span { width: 16px; height: 2px; background: currentColor; }
@media (max-width: 719px) {
  .menu-btn { display: inline-flex; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0;
         background: var(--bg-elev); border-bottom: 1px solid var(--line); padding: 0.25rem var(--pad) 0.75rem; }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; gap: 0; }
  .nav a { display: block; padding: 0.8rem 0; font-size: 1.05rem; }
  .nav li + li { border-top: 1px solid var(--line); }
}
html:not(.js) .btn-icon { display: none; }
@media (max-width: 719px) {
  html:not(.js) .top-in { flex-wrap: wrap; row-gap: 0.3rem; }
  html:not(.js) .nav { display: block; position: static; border: 0; padding: 0; width: 100%; background: none; }
  html:not(.js) .nav ul { flex-direction: row; gap: 1.2rem; }
  html:not(.js) .nav a { padding: 0; font-size: 0.95rem; }
  html:not(.js) .nav li + li { border: 0; }
}

/* --------------------------------- hero --------------------------------- */

.hero { padding: clamp(2.5rem, 7vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4.5rem); }
.hero-grid { display: grid; gap: 2.5rem; align-items: center; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: 3.5rem; } }
.hero h1 { font-size: clamp(2.3rem, 4.6vw, 3.7rem); line-height: 1.06; margin: 1rem 0 1.5rem; }
.hero h1 em { font-style: italic; font-weight: 400; color: var(--teal); }
.hero .lede + .lede { margin-top: 0.9rem; }
.cta { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2rem; }
.btn {
  display: inline-block; padding: 0.75rem 1.3rem; border-radius: 999px;
  font-weight: 600; font-size: 0.98rem; text-decoration: none;
  border: 1.5px solid var(--ink);
}
.btn-solid { background: var(--ink); color: var(--bg); }
.btn-solid:hover { background: var(--teal); border-color: var(--teal); color: var(--bg); }
.btn:not(.btn-solid):hover { border-color: var(--teal); }

.art { margin: 0 auto; max-width: 34rem; }
.art-frame {
  border: 1.5px solid var(--ink); border-radius: 16px; overflow: hidden;
  box-shadow: 10px 10px 0 var(--shadow); transform: rotate(-1.2deg);
  background: var(--bg-elev);
}
.art figcaption {
  font-family: var(--serif); font-style: italic; font-size: 0.98rem;
  color: var(--ink-dim); margin-top: 1.4rem; text-align: center;
}

/* ------------------------------ stat band ------------------------------- */

.stats { border-top: 1.5px solid var(--ink); border-bottom: 1.5px solid var(--ink); }
.stats-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 900px) { .stats-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.stat { padding: 1.6rem 1.25rem 1.7rem 0; }
.stat + .stat { padding-left: 1.25rem; border-left: 1px solid var(--line); }
@media (max-width: 899px) {
  .stat:nth-child(3) { padding-left: 0; border-left: 0; }
  .stat:nth-child(n+3) { border-top: 1px solid var(--line); }
}
.stat b { display: block; font-family: var(--display); font-weight: 700; font-size: clamp(2.3rem, 5vw, 3.4rem); line-height: 1; color: var(--teal); }
.stat span { display: block; margin-top: 0.6rem; font-size: 0.93rem; color: var(--ink-dim); max-width: 24ch; }
.stat a { color: var(--ink); }

/* ------------------------------- sections ------------------------------- */

.section { padding-top: var(--gap); }
.section-head { max-width: 46rem; margin-bottom: 2.25rem; }
.section-head h2 { margin: 0.7rem 0 1rem; }

.split { display: grid; gap: 2.5rem; }
@media (min-width: 900px) { .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 4rem; } }
.prose { max-width: var(--measure); }
.prose > * + p { margin-top: 1rem; }
.prose h2 { font-size: clamp(1.5rem, 3vw, 1.9rem); margin: 2.75rem 0 0.9rem; }
.prose ul, .prose ol { padding-left: 1.2rem; margin-top: 0.8rem; }
.prose li + li { margin-top: 0.45rem; }
.prose li::marker { color: var(--amber); }

/* areas (what I do) */
.areas { list-style: none; padding: 0; border-top: 1px solid var(--line); }
.areas li { padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
.areas h3 { font-size: 1.12rem; }
.areas p { color: var(--ink-dim); font-size: 0.97rem; margin-top: 0.3rem; }
.areas .proof { color: var(--ink); }
.areas .proof b { color: var(--amber); }

/* a quote from the bookshelf */
.shelf {
  margin: 2.5rem 0 0; padding: 1.4rem 1.5rem 1.3rem; max-width: 40rem;
  background: var(--bg-elev); border: 1px solid var(--line);
  border-left: 5px solid var(--amber); border-radius: 4px 12px 12px 4px;
}
.shelf p { font-family: var(--serif); font-style: italic; font-size: 1.18rem; line-height: 1.45; }
.shelf footer { margin-top: 0.8rem; font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.03em; color: var(--ink-dim); }
.shelf footer b { color: var(--amber); font-weight: 400; text-transform: uppercase; letter-spacing: 0.1em; margin-right: 0.6rem; }
.shelf-wide { max-width: none; }

/* ------------------------------ case cards ------------------------------ */

.cases { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr)); }
.case {
  position: relative; display: flex; flex-direction: column; gap: 0.7rem;
  padding: 1.5rem; background: var(--bg-elev);
  border: 1.5px solid var(--ink); border-radius: 14px;
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.case:hover { transform: translate(-3px, -3px); box-shadow: 7px 7px 0 var(--shadow); }
.case-no { font-family: var(--mono); font-size: 0.76rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--amber); }
.case h3 a { text-decoration: none; }
.case h3 a::after { content: ""; position: absolute; inset: 0; }
.case p { color: var(--ink-dim); font-size: 0.97rem; }
.case .tags { margin-top: auto; padding-top: 0.6rem; }
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; }
.tags li { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-dim); border: 1px solid var(--line); border-radius: 999px; padding: 0.1rem 0.6rem; }
.case-soon { border-style: dashed; border-color: var(--line); }
.case-soon:hover { transform: none; box-shadow: none; }

/* ------------------------------ case pages ------------------------------ */

.case-head { padding: clamp(2.5rem, 6vw, 4.5rem) 0 2rem; max-width: 52rem; }
.case-head h1 { font-size: clamp(2.2rem, 5.4vw, 3.9rem); line-height: 1.04; margin: 0.9rem 0 1.2rem; }
.crumb { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.06em; color: var(--ink-dim); }
.crumb a { text-decoration: none; color: var(--teal); }

.brief { display: grid; border: 1.5px solid var(--ink); border-radius: 14px; overflow: hidden; background: var(--bg-elev); }
@media (min-width: 900px) { .brief { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.brief div { padding: 1.2rem 1.3rem 1.3rem; }
.brief div + div { border-top: 1px solid var(--line); }
@media (min-width: 900px) { .brief div + div { border-top: 0; border-left: 1px solid var(--line); } }
.brief dt { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--amber); margin-bottom: 0.45rem; }
.brief dd { margin: 0; font-size: 0.95rem; }

.case-body { display: grid; gap: 2.5rem; padding-top: 3rem; }
@media (min-width: 1000px) { .case-body { grid-template-columns: minmax(0, 1fr) 19rem; gap: 4rem; align-items: start; } }
.case-body .prose > h2:first-child { margin-top: 0; }
.aside { display: grid; gap: 1.5rem; }
@media (min-width: 1000px) { .aside { position: sticky; top: 5.5rem; } }
.note { border: 1px solid var(--line); border-radius: 12px; padding: 1.2rem 1.25rem; background: var(--bg-elev); font-size: 0.93rem; }
.note h2 { font-family: var(--mono); font-weight: 400; font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--teal); margin-bottom: 0.6rem; }
.note ul { padding-left: 1.1rem; }
.note li + li { margin-top: 0.4rem; }
.pull { font-family: var(--serif); font-style: italic; font-size: clamp(1.3rem, 2.6vw, 1.6rem); line-height: 1.35; color: var(--teal); margin: 2rem 0; padding-left: 1.2rem; border-left: 3px solid var(--teal); }

/* bar chart built from plain elements (readable without styles too) */
.chart { margin: 2rem 0; padding: 1.4rem 1.5rem; border: 1px solid var(--line); border-radius: 12px; background: var(--bg-elev); }
.chart figcaption { font-size: 0.88rem; color: var(--ink-dim); margin-top: 1rem; }
.chart-title { font-weight: 600; margin-bottom: 1rem; }
.bars { display: grid; grid-template-columns: max-content minmax(0, 1fr) max-content; gap: 0.6rem 0.9rem; align-items: center; list-style: none; padding: 0; margin: 0; font-size: 0.93rem; }
.bars li { display: contents; }
.bars i { display: block; height: 1.15rem; min-width: 3px; border-radius: 3px; background: var(--teal); }
.bars .hot i { background: var(--amber); }
.bars b { font-family: var(--mono); font-weight: 400; }

.lessons { margin-top: 3rem; padding: 1.6rem 1.7rem; border: 1.5px solid var(--ink); border-radius: 14px; box-shadow: 7px 7px 0 var(--shadow); background: var(--bg-elev); max-width: var(--measure); }
.lessons h2 { font-size: 1.35rem; margin: 0 0 0.8rem; }
.next { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; margin-top: 3.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-weight: 600; }

/* ------------------------------ the record ------------------------------ */

.role { display: grid; gap: 0.3rem 2rem; padding: 1.6rem 0; border-bottom: 1px solid var(--line); }
@media (min-width: 800px) { .role { grid-template-columns: 14rem minmax(0, 1fr); } }
.role-when { font-family: var(--mono); font-size: 0.8rem; color: var(--ink-dim); padding-top: 0.35rem; }
.role-org { color: var(--ink-dim); margin-top: 0.15rem; }
.role ul { max-width: var(--measure); padding-left: 1.15rem; margin-top: 0.85rem; }
.role li { margin-top: 0.45rem; }
.role li::marker { color: var(--amber); }
.chips { display: flex; flex-wrap: wrap; gap: 0.55rem; list-style: none; padding: 0; }
.chips li { font-family: var(--mono); font-size: 0.86rem; border: 1px solid var(--line); background: var(--bg-elev); border-radius: 999px; padding: 0.3rem 0.9rem; }
.langs { list-style: none; padding: 0; display: grid; gap: 0.9rem 2rem; grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr)); }
.langs b { display: block; font-family: var(--serif); font-size: 1.25rem; }
.langs span { font-size: 0.88rem; color: var(--ink-dim); }

/* ---------------------------- contact + footer -------------------------- */

.contact { margin-top: var(--gap); border-top: 1.5px solid var(--ink); padding: clamp(2.5rem, 6vw, 4rem) 0; }
.contact h2 { max-width: 20ch; }
.contact-links { display: flex; flex-wrap: wrap; gap: 0.8rem 2.2rem; list-style: none; padding: 0; margin-top: 1.6rem; font-size: 1.1rem; overflow-wrap: anywhere; }
.foot { border-top: 1px solid var(--line); padding: 1.5rem 0 2.5rem; color: var(--ink-dim); font-size: 0.84rem; }
.foot p + p { margin-top: 0.35rem; }

/* -------------------------------- motion -------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  html.js .reveal { opacity: 0; transform: translateY(10px); transition: opacity 200ms ease-out, transform 200ms ease-out; }
  html.js .reveal.in { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .case, .art-frame { transition: none; }
}
@media print {
  .top, .skip, .cta { display: none; }
  html.js .reveal { opacity: 1; transform: none; }
}