/* ==========================================================================
   Włosy pod lupą - kompendium trychologiczne
   Design system: deep pine panel + porcelain paper + copper hairline
   ========================================================================== */

:root{
  --bg:#e7ebe4;
  --surface:#fdfefa;
  --surface-2:#f4f7f1;
  --ink:#141a17;
  --ink-2:#39463f;
  --muted:#5b6861;
  --line:#d3dad2;
  --line-strong:#b4c0b6;
  --pine:#12332b;
  --pine-2:#0b231d;
  --pine-soft:#e3ece7;
  --copper:#a3542a;
  --copper-2:#c47a4c;
  --copper-wash:#f4e9e0;
  --red:#9d2f2a;
  --red-soft:#faeae7;
  --shadow-sm:0 1px 2px rgba(18,51,43,.05);
  --shadow-md:0 10px 30px -18px rgba(18,51,43,.35);
  --radius:12px;
  --radius-sm:8px;
  --header-h:66px;
  --sidebar-w:292px;
  --ease-out:cubic-bezier(.23,1,.32,1);
  --ease-io:cubic-bezier(.77,0,.175,1);
  --font-display:"Bodoni Moda","Iowan Old Style","Palatino Linotype",Palatino,Georgia,serif;
  --font-body:"Figtree",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#0d1512;
    --surface:#141f1b;
    --surface-2:#182521;
    --ink:#e9ede7;
    --ink-2:#c3cec7;
    --muted:#9caba3;
    --line:#28352f;
    --line-strong:#39473f;
    --pine:#16382e;
    --pine-2:#0a1d17;
    --pine-soft:#1b2d26;
    --copper:#d78f61;
    --copper-2:#e0a37c;
    --copper-wash:#2a1d16;
    --red:#e8837b;
    --red-soft:#2d1715;
    --shadow-sm:0 1px 2px rgba(0,0,0,.4);
    --shadow-md:0 12px 34px -18px rgba(0,0,0,.7);
  }
}

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

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 24px);
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.68;
  font-weight:400;
  letter-spacing:-.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* body atmosphere - two very soft corner washes, no grid, no stripes */
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background:
    radial-gradient(60rem 40rem at 92% -10%, rgba(163,84,42,.075), transparent 68%),
    radial-gradient(50rem 36rem at -8% 105%, rgba(18,51,43,.07), transparent 70%);
}
@media (prefers-color-scheme: dark){
  body::before{
    background:
      radial-gradient(60rem 40rem at 92% -10%, rgba(215,143,97,.09), transparent 68%),
      radial-gradient(50rem 36rem at -8% 105%, rgba(63,110,92,.14), transparent 70%);
  }
}

img{max-width:100%;display:block;height:auto}
a{color:var(--copper);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--ink)}
button{font:inherit;color:inherit}

::selection{background:rgba(163,84,42,.2);color:var(--ink)}

:focus-visible{
  outline:2px solid var(--copper);
  outline-offset:3px;
  border-radius:3px;
}

.skip-link{
  position:absolute;left:12px;top:-60px;z-index:120;
  background:var(--pine);color:#fff;padding:10px 16px;border-radius:0 0 8px 0;
  font-size:.9rem;transition:top .18s var(--ease-out);
}
.skip-link:focus{top:0;color:#fff}

/* ============================ HEADER ============================ */

.app-header{
  position:fixed;top:0;left:0;right:0;height:var(--header-h);
  z-index:60;
  display:flex;align-items:center;gap:18px;
  padding:0 26px;
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.app-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(163,84,42,.55),transparent);
  opacity:.5;pointer-events:none;
}

.brand{
  display:flex;align-items:center;gap:11px;
  text-decoration:none;color:var(--ink);
  min-width:0;
}
.brand-mark{
  width:36px;height:36px;flex:0 0 36px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--pine);color:#f6efe6;
  font-family:var(--font-display);font-size:1.12rem;line-height:1;
  letter-spacing:.02em;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.14);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12;min-width:0}
.brand-name{
  font-family:var(--font-display);font-size:1.06rem;font-weight:600;
  letter-spacing:-.015em;white-space:nowrap;
}
.brand-sub{
  font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);font-weight:600;
}

.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}

.search{position:relative;width:min(340px,38vw)}
.search input{
  width:100%;height:40px;
  padding:0 40px 0 14px;
  border:1px solid var(--line-strong);border-radius:999px;
  background:var(--surface-2);
  color:var(--ink);
  font-size:.92rem;
  transition:border-color .18s ease,background .18s ease,box-shadow .18s ease;
}
.search input::placeholder{color:var(--muted)}
.search input:focus{
  outline:none;border-color:var(--copper);
  background:var(--surface);
  box-shadow:0 0 0 3px rgba(163,84,42,.13);
}
.search-key{
  position:absolute;right:10px;top:50%;transform:translateY(-50%);
  font-size:.68rem;font-weight:600;color:var(--muted);
  border:1px solid var(--line);border-radius:5px;
  padding:2px 6px;background:var(--surface);pointer-events:none;
}
.search input:focus ~ .search-key{opacity:0}

.search-results{
  position:absolute;top:calc(100% + 8px);right:0;left:auto;
  width:min(460px,86vw);
  background:var(--surface);
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  box-shadow:var(--shadow-md);
  padding:6px;
  max-height:min(62vh,520px);overflow:auto;
  transform-origin:top right;
  opacity:0;transform:scale(.97) translateY(-4px);
  pointer-events:none;
  transition:opacity .16s ease,transform .18s var(--ease-out);
  z-index:70;
}
.search-results.is-open{opacity:1;transform:none;pointer-events:auto}
.search-hit{
  display:block;padding:9px 12px;border-radius:8px;
  text-decoration:none;color:var(--ink);
}
.search-hit strong{
  display:block;font-weight:600;font-size:.95rem;line-height:1.35;
}
.search-hit span{
  display:block;font-size:.76rem;color:var(--muted);
  letter-spacing:.04em;text-transform:uppercase;margin-top:3px;
}
.search-hit:hover,.search-hit:focus-visible{background:var(--copper-wash);color:var(--ink)}
.search-empty{padding:14px 12px;color:var(--muted);font-size:.9rem}

.menu-btn{
  display:none;
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line-strong);
  background:var(--surface-2);
  align-items:center;justify-content:center;
  cursor:pointer;
  transition:background .16s ease,border-color .16s ease;
}
.menu-btn:hover{background:var(--copper-wash);border-color:var(--copper)}
.menu-btn span{
  display:block;width:16px;height:1.5px;background:var(--ink);
  position:relative;transition:transform .2s var(--ease-out),opacity .15s ease;
}
.menu-btn span::before,.menu-btn span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink);
  transition:transform .2s var(--ease-out);
}
.menu-btn span::before{top:-5px}
.menu-btn span::after{top:5px}
.search-toggle{display:none}
.search-toggle svg{pointer-events:none}
body.nav-open .menu-btn span{background:transparent}
body.nav-open .menu-btn span::before{transform:translateY(5px) rotate(45deg)}
body.nav-open .menu-btn span::after{transform:translateY(-5px) rotate(-45deg)}

/* ============================ SIDEBAR ============================ */

.sidebar{
  position:fixed;
  top:var(--header-h);left:0;bottom:0;
  width:var(--sidebar-w);
  z-index:50;
  background:var(--surface);
  border-right:1px solid var(--line);
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:22px 0 44px;
  scrollbar-width:thin;
}
.sidebar::-webkit-scrollbar{width:9px}
.sidebar::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:9px;border:3px solid var(--surface)}

.side-head{
  padding:0 24px 16px;
  border-bottom:1px solid var(--line);
  margin-bottom:8px;
}
.side-title{
  font-family:var(--font-display);
  font-size:1.06rem;letter-spacing:-.01em;text-transform:none;
  color:var(--ink);font-weight:500;margin:0 0 5px;
}
.side-note{font-size:.8rem;color:var(--muted);margin:0;line-height:1.5}

.nav-home{
  display:flex;align-items:center;gap:9px;
  margin:10px 14px 0;
  padding:9px 11px;
  border-radius:var(--radius-sm);
  font-size:.94rem;font-weight:600;color:var(--ink);
  text-decoration:none;
  transition:background .16s ease,color .16s ease;
}
.nav-home:hover{background:var(--pine-soft);color:var(--ink)}
.nav-home.is-active{background:var(--pine);color:#f4f7f4}
.nav-home svg{flex:0 0 auto;opacity:.75}

.nav-group{margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}
.nav-h{
  padding:0 24px;
  margin:0 0 7px;
  font-family:var(--font-display);
  font-size:.99rem;letter-spacing:-.005em;text-transform:none;
  font-weight:500;color:var(--ink);
  display:flex;align-items:baseline;gap:7px;
}
.nav-h em{
  font-family:var(--font-body);
  font-style:normal;font-size:.72rem;letter-spacing:0;
  color:var(--muted);font-weight:500;
}
.nav-list{list-style:none;margin:0;padding:0}
.nav-link{
  display:block;
  padding:7px 24px 7px 23px;
  font-size:.95rem;line-height:1.4;
  color:var(--ink-2);text-decoration:none;
  border-left:2px solid transparent;
  transition:color .14s ease,background .14s ease,border-color .14s ease;
}
.nav-link:hover{color:var(--ink);background:var(--surface-2);border-left-color:var(--line-strong)}
.nav-link.is-active{
  color:var(--copper);font-weight:600;
  background:var(--copper-wash);
  border-left-color:var(--copper);
}

/* Drawer otwarty: baner cookies nie może zasłaniać dolnych pozycji menu */
body.nav-open #vd-cookie-bar{display:none!important}

.overlay{
  position:fixed;inset:0;z-index:45;
  background:rgba(8,20,16,.48);
  opacity:0;pointer-events:none;
  transition:opacity .22s ease;
}

/* ============================ SHELL / MAIN ============================ */

.shell{position:relative;z-index:1}
.main{
  margin-left:var(--sidebar-w);
  padding-top:var(--header-h);
  min-height:100vh;
}

.wrap{
  max-width:1088px;
  margin:0 auto;
  padding:0 44px;
}

.read-progress{
  position:fixed;top:var(--header-h);left:var(--sidebar-w);right:0;height:2px;z-index:55;
  background:var(--copper);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .1s linear;
}

/* ============================ HOME HERO ============================ */

.hero{
  position:relative;
  background:var(--pine);
  color:#eff3ee;
  overflow:hidden;
  isolation:isolate;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(38rem 30rem at 78% 22%, rgba(196,122,76,.22), transparent 62%),
    radial-gradient(30rem 24rem at 8% 96%, rgba(10,35,29,.85), transparent 70%);
}
.hero-inner{
  max-width:1088px;margin:0 auto;
  padding:56px 44px 58px;
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:44px;
  align-items:center;
}
.hero-copy{max-width:34rem}

.hero-name{
  margin:0;
  font-family:var(--font-display);
  font-weight:500;
  font-size:clamp(2.6rem,5.1vw,4.35rem);
  line-height:1.02;
  letter-spacing:-.028em;
  color:#f7f4ee;
  text-wrap:balance;
}
.hero-name em{
  font-style:italic;color:var(--copper-2);
  font-weight:400;font-size:1.03em;
}
.hero-lede{
  margin:22px 0 0;
  font-size:1.07rem;
  line-height:1.66;
  color:#cdd8d1;
  max-width:31rem;
}
.hero-actions{
  margin-top:30px;
  display:flex;align-items:center;flex-wrap:wrap;gap:18px;
}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:15px 27px;
  border-radius:5px;
  background:#f4efe4;color:#12332b;
  font-size:.93rem;font-weight:700;letter-spacing:.01em;
  text-decoration:none;
  border:1px solid #f4efe4;
  transition:transform .16s var(--ease-out),background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-ghost{
  background:transparent;color:var(--cream);border:1px solid rgba(244,239,228,.38);
  font-weight:500;padding:15px 22px;
}
.btn-ghost:hover{background:rgba(244,239,228,.1);border-color:rgba(244,239,228,.62);transform:translateY(-1px)}

.btn:hover{background:#fffdf8;color:#0c241e;border-color:#fffdf8;transform:translateY(-1px)}
.btn:active{transform:scale(.98)}
.btn svg{transition:transform .2s var(--ease-out)}
.btn:hover svg{transform:translateX(3px)}

.link-quiet{
  color:#e9cbb6;text-decoration:none;font-size:.95rem;font-weight:600;
  border-bottom:1px solid rgba(233,203,182,.5);
  padding-bottom:2px;
  transition:color .16s ease,border-color .16s ease;
}
.link-quiet:hover{color:#fff;border-color:#fff}

.hero-media{position:relative;display:flex;flex-direction:column;align-items:center;gap:14px}
.hero-lens{
  position:relative;
  width:min(368px,100%);
  aspect-ratio:1;
  border-radius:50%;
  overflow:hidden;
  box-shadow:
    0 0 0 1px rgba(196,122,76,.55),
    0 0 0 11px rgba(246,241,232,.055),
    0 30px 70px -26px rgba(0,0,0,.75);
  background:#0a201a;
}
.hero-lens img{
  width:100%;height:100%;object-fit:cover;
  transform:scale(1.07);
  animation:lensIn 1.5s var(--ease-out) .05s forwards;
}
@keyframes lensIn{to{transform:scale(1)}}

.hero-cap{
  margin:0;font-size:.76rem;line-height:1.5;
  color:#a9bdb3;text-align:center;max-width:24rem;
}
.hero-cap a{color:#c9b3a3;text-decoration:none;border-bottom:1px solid rgba(201,179,163,.4)}
.hero-cap a:hover{color:#fff}

/* quick router under hero */
.quick{
  background:var(--bg);
  border-bottom:1px solid var(--line);
}
.quick-inner{
  max-width:1088px;margin:0 auto;padding:19px 44px;
  display:flex;flex-wrap:wrap;align-items:center;gap:6px 26px;
}
.quick-label{
  align-self:center;
  font-family:var(--font-display);font-style:italic;
  font-size:1.04rem;letter-spacing:0;text-transform:none;
  color:var(--ink);font-weight:400;
  padding:0;margin:0 10px 0 0;
  border:0;
}
.quick a{
  display:inline-flex;align-items:center;gap:7px;
  padding:2px 0;
  font-size:.96rem;font-weight:500;color:var(--ink-2);
  text-decoration:none;
  border-bottom:1px solid rgba(163,84,42,.28);
  transition:color .15s ease,border-color .15s ease;
}
.quick a:last-child{border-right:0}
.quick a:hover{color:var(--copper);background:var(--surface-2)}
.quick a svg{opacity:0;transform:translateX(-4px);transition:opacity .16s ease,transform .18s var(--ease-out)}
.quick a:hover svg{opacity:1;transform:none}

/* ============================ SECTIONS / LISTS ============================ */

.home-body{padding:10px 0 76px}

.sec{
  padding-top:46px;
  scroll-margin-top:calc(var(--header-h) + 20px);
}
.sec-head{
  display:flex;align-items:baseline;gap:16px;
  margin-bottom:6px;
}
.sec-head h2{
  margin:0;
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(1.56rem,2.7vw,1.98rem);
  letter-spacing:-.024em;
  line-height:1.15;
  white-space:nowrap;
  text-wrap:balance;
}
.sec-rule{
  flex:1 1 auto;height:1px;background:var(--line);transform:translateY(-4px);
}
.sec-count{
  font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);font-weight:700;white-space:nowrap;
}
.sec-desc{
  margin:6px 0 0;color:var(--muted);font-size:.94rem;max-width:52ch;
}

.art-list{list-style:none;margin:16px 0 0;padding:0}
.art-row a{
  display:grid;
  grid-template-columns:1fr auto;
  gap:4px 20px;
  align-items:center;
  padding:23px 6px 23px 0;
  border-top:1px solid var(--line);
  text-decoration:none;
  color:inherit;
  transition:background .16s ease;
}
.art-row:last-child a{border-bottom:1px solid var(--line)}
.art-row a:hover{background:linear-gradient(90deg,var(--copper-wash),transparent 70%)}
.art-row h3{
  margin:0 0 3px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:1.16rem;
  letter-spacing:-.014em;
  line-height:1.28;
  transition:color .16s ease,transform .18s var(--ease-out);
}
.art-row a:hover h3{color:var(--copper);transform:translateX(3px)}
.art-row p{
  margin:0;grid-column:1;
  font-size:.9rem;line-height:1.6;color:var(--muted);
  max-width:76ch;
}
.art-row .arrow{
  grid-row:1/3;grid-column:2;align-self:center;
  color:var(--copper);opacity:0;transform:translateX(-6px);
  transition:opacity .18s ease,transform .2s var(--ease-out);
}
.art-row a:hover .arrow{opacity:1;transform:none}

/* closing note */
.closing{
  margin-top:60px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  padding:30px 32px;
}
.closing h2{
  margin:0 0 8px;
  font-family:var(--font-display);font-size:1.35rem;font-weight:600;letter-spacing:-.02em;
}
.closing p{margin:0;color:var(--ink-2);font-size:.95rem;max-width:64ch}
.closing-links{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:14px;font-size:.9rem;font-weight:600}

/* ============================ ARTICLE ============================ */

.page{padding:34px 0 78px}
.crumbs{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:.78rem;color:var(--muted);
  margin-bottom:20px;
}
.crumbs a{color:var(--muted);text-decoration:none;font-weight:600}
.crumbs a:hover{color:var(--copper)}
.crumbs span{opacity:.5}

.page-head{max-width:46rem}
.page-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;
  font-weight:700;color:var(--copper);
  margin-bottom:12px;
}
.page-kicker::before{
  content:"";width:18px;height:1px;background:var(--copper);display:block;
}
.page-head h1{
  margin:0;
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(2rem,3.9vw,3rem);
  line-height:1.1;
  letter-spacing:-.028em;
  text-wrap:balance;
}
.page-lede{
  margin:18px 0 0;
  font-size:1.06rem;line-height:1.62;
  color:var(--ink-2);
  max-width:42rem;
}
.page-meta{
  display:flex;flex-wrap:wrap;gap:8px 18px;
  margin-top:20px;padding-bottom:22px;
  border-bottom:1px solid var(--line);
  font-size:.79rem;color:var(--muted);
  letter-spacing:.02em;
}
.page-meta b{color:var(--ink-2);font-weight:600}

/* TOC */
.toc{
  margin:26px 0 4px;
  max-width:42rem;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  padding:20px 24px;
}
.toc-title{
  margin:0 0 10px;
  font-size:.68rem;letter-spacing:.17em;text-transform:uppercase;
  color:var(--muted);font-weight:700;
}
.toc ol{
  margin:0;padding-left:20px;
  columns:2;column-gap:32px;
  font-size:.92rem;line-height:1.6;
}
.toc li{margin-bottom:6px;break-inside:avoid}
.toc a{color:var(--ink-2);text-decoration:none;border-bottom:1px solid transparent}
.toc a:hover{color:var(--copper);border-bottom-color:rgba(163,84,42,.4)}

/* article body */
.article{
  max-width:44rem;
  margin-top:30px;
  font-size:1.055rem;      /* ~18px */
  line-height:1.74;
  color:var(--ink);
  text-wrap:pretty;
}
.article > p{margin:0 0 1.15em}
.article > p:first-child{font-size:1.09rem;color:var(--ink-2)}
.article h2{
  margin:2.4em 0 .6em;
  padding-top:.9em;
  border-top:1px solid var(--line);
  font-family:var(--font-display);
  font-weight:600;
  font-size:clamp(1.4rem,2.4vw,1.62rem);
  line-height:1.25;
  letter-spacing:-.02em;
  scroll-margin-top:calc(var(--header-h) + 18px);
  text-wrap:balance;
}
.article h3{
  margin:1.9em 0 .45em;
  font-family:var(--font-body);
  font-weight:700;
  font-size:1.06rem;
  letter-spacing:-.008em;
  scroll-margin-top:calc(var(--header-h) + 18px);
}
.article h2:first-child{margin-top:0;border-top:0;padding-top:0}
.article ul,.article ol{margin:0 0 1.2em;padding-left:1.35em}
.article li{margin-bottom:.45em}
.article li::marker{color:var(--copper)}
.article strong{font-weight:700}
.article em{font-style:italic}
.article a{color:var(--copper);text-decoration:underline;text-decoration-color:rgba(163,84,42,.35)}
.article a:hover{text-decoration-color:var(--copper)}
.article blockquote{
  margin:1.6em 0;padding:2px 0 2px 22px;
  border-left:2px solid var(--copper);
  color:var(--ink-2);font-style:italic;
}
.article hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}

/* tables */
.table-wrap{
  margin:1.6em 0;
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
}
.article table{
  width:100%;border-collapse:collapse;
  font-size:.9rem;line-height:1.5;
  min-width:520px;
}
.article th,.article td{
  padding:11px 14px;text-align:left;vertical-align:top;
  border-bottom:1px solid var(--line);
}
.article tbody tr:nth-child(even){background:var(--surface-2)}
.article td:first-child,.article th:first-child{font-weight:600;color:var(--ink)}
.article th{
  position:sticky;top:var(--header-h);z-index:1;
  background:var(--pine-soft);color:var(--pine);font-weight:700;
  letter-spacing:.02em;
  font-weight:700;font-size:.78rem;
  letter-spacing:.05em;text-transform:uppercase;
  white-space:nowrap;
}
.article tr:last-child td{border-bottom:0}
.article td.num{font-variant-numeric:tabular-nums}

/* callouts - no side stripes */
.info-box,.tip-box,.warning-box,.key-takeaways{
  margin:1.7em 0;
  padding:19px 22px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink);
  font-size:.97rem;
  line-height:1.65;
}
.info-box{
  background:var(--pine-soft);
  border-color:color-mix(in srgb,var(--pine) 18%,transparent);
}
.tip-box{
  background:var(--copper-wash);
  border-color:color-mix(in srgb,var(--copper) 22%,transparent);
}
.warning-box{
  background:var(--red-soft);
  border-color:color-mix(in srgb,var(--red) 24%,transparent);
}
.key-takeaways{
  background:var(--pine);
  border-color:var(--pine);
  color:#e8f0ea;
}
.info-box > :first-child,.tip-box > :first-child,
.warning-box > :first-child,.key-takeaways > :first-child{margin-top:0}
.info-box > :last-child,.tip-box > :last-child,
.warning-box > :last-child,.key-takeaways > :last-child{margin-bottom:0}
.info-box strong,.tip-box strong,.warning-box strong{color:var(--ink)}
.key-takeaways strong,.key-takeaways a{color:#f0d6c2}
.key-takeaways h3,.key-takeaways h2{
  border:0;padding:0;margin:0 0 .5em;
  color:#fff;font-size:1rem;font-family:var(--font-body);
  letter-spacing:.06em;text-transform:uppercase;font-weight:700;
}
.key-takeaways ul{margin:0;padding-left:1.2em}
.key-takeaways li::marker{color:var(--copper-2)}
.info-box p,.tip-box p,.warning-box p{margin:0 0 .7em}
.info-box p:last-child,.tip-box p:last-child,.warning-box p:last-child{margin-bottom:0}
.warning-box strong{color:var(--red)}

/* FAQ */
.faq{margin:1.4em 0 0}
.faq-item{
  border-bottom:1px solid var(--line);
  padding:2px 0;
}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:16px 0;
  cursor:pointer;
  list-style:none;
  font-weight:600;font-size:1rem;line-height:1.45;
  color:var(--ink);
  transition:color .15s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--copper)}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  font-family:var(--font-body);font-weight:400;
  font-size:1.3rem;line-height:1;
  color:var(--copper);
  transition:transform .2s var(--ease-out);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-a{
  padding:0 32px 16px 0;
  color:var(--ink-2);
  font-size:.98rem;
}
.faq-item .faq-a p{margin:0 0 .8em}
.faq-item .faq-a p:last-child{margin-bottom:0}

/* glossary */
.article dl{margin:1.2em 0 0}
.article dt{
  font-family:var(--font-display);
  font-weight:600;font-size:1.1rem;line-height:1.35;
  letter-spacing:-.01em;
  margin:22px 0 4px;
  color:var(--ink);
}
.article dd{
  margin:0;padding-bottom:16px;
  border-bottom:1px solid var(--line);
  color:var(--ink-2);font-size:.99rem;
}

/* article footer */
.page-foot{
  max-width:44rem;
  margin-top:44px;padding-top:26px;
  border-top:1px solid var(--line);
}
.page-foot .note{
  font-size:.85rem;color:var(--muted);line-height:1.6;
  margin:0 0 18px;
}
.next-links{display:flex;flex-wrap:wrap;gap:10px}
.next-links a{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;
  border:1px solid var(--line-strong);border-radius:999px;
  font-size:.88rem;font-weight:600;text-decoration:none;color:var(--ink-2);
  background:var(--surface);
  transition:border-color .16s ease,color .16s ease,transform .16s var(--ease-out);
}
.next-links a:hover{border-color:var(--copper);color:var(--copper);transform:translateY(-1px)}

/* ============================ FOOTER ============================ */

.foot{
  margin-left:var(--sidebar-w);
  border-top:1px solid var(--line);
  background:var(--surface);
}
.main .foot{margin-left:0}
.foot-inner{
  max-width:1088px;margin:0 auto;padding:34px 44px 46px;
  display:flex;flex-wrap:wrap;gap:24px 40px;align-items:flex-start;justify-content:space-between;
}
.foot-brand{max-width:26rem}
.foot-brand .brand-name{font-size:1.05rem}
.foot-brand p{margin:8px 0 0;font-size:.85rem;color:var(--muted);line-height:1.6}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 24px;font-size:.87rem}
.foot-links a{color:var(--ink-2);text-decoration:none;font-weight:600}
.foot-links a:hover{color:var(--copper)}
.foot-legal{
  max-width:1088px;margin:0 auto;padding:0 44px 34px;
  font-size:.78rem;color:var(--muted);
}

/* ============================ ANIMATIONS ============================ */

.fade-up{animation:fadeUp .34s var(--ease-out) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(9px)}to{opacity:1;transform:none}}
[hidden]{display:none!important}

/* ============================ RESPONSIVE ============================ */

@media (max-width:1180px){
  :root{--sidebar-w:272px}
  .wrap,.hero-inner,.quick-inner,.foot-inner,.foot-legal{padding-left:34px;padding-right:34px}
}

@media (max-width:980px){
  :root{--sidebar-w:288px}
  .nav-link{padding:10px 22px 10px 21px}
  .side-sec{padding:18px 22px 6px}
  .sidebar{
    transform:translateX(-101%);
    transition:transform .3s var(--ease-drawer,cubic-bezier(.32,.72,0,1));
    box-shadow:0 0 40px rgba(0,0,0,.18);
  }
  body.nav-open .sidebar{transform:none}
  body.nav-open .overlay{opacity:1;pointer-events:auto}
  body.nav-open{overflow:hidden}
  .main,.foot{margin-left:0}
  .read-progress{left:0}
  .menu-btn{display:inline-flex}
  .search-toggle{display:none}
  .header-tools{gap:8px}
  .search{width:min(280px,42vw)}
  .hero-inner{
    grid-template-columns:1fr;
    gap:34px;
    padding-top:44px;padding-bottom:46px;
  }
  .hero-media{order:2;align-items:flex-start}
  .hero-lens{width:min(300px,72vw)}
  .hero-cap{text-align:left}
  .quick-label{border-right:0;padding-right:0;padding-bottom:0}
}

@media (max-width:680px){
  body{font-size:17px}
  .app-header{padding:0 16px;gap:10px}
  .brand-sub{display:none}
  .brand-name{font-size:.98rem}
  .wrap,.hero-inner,.quick-inner,.foot-inner,.foot-legal{padding-left:20px;padding-right:20px}
  .search{position:absolute;left:16px;right:16px;top:calc(var(--header-h) + 8px);width:auto;display:none}
  body.search-open .search{display:block}
  .search-toggle{display:inline-flex}
  .search input{height:44px;box-shadow:var(--shadow-md)}
  .search-results{position:fixed;left:12px;right:12px;width:auto;top:calc(var(--header-h) + 58px)}
  .search-key{display:none}
  .hero-inner{padding-top:28px;padding-bottom:32px;gap:26px}
  .hero-name{font-size:clamp(2rem,8.6vw,2.55rem);line-height:1.02}
  .hero-name em{font-size:1em}
  .hero-lede{font-size:1.06rem;line-height:1.55;margin-top:16px}
  .hero-actions{gap:14px;margin-top:22px}
  .quick-inner{padding:15px 20px;gap:8px 18px}
  .quick a{padding:2px 0;font-size:.92rem}
  .sec{padding-top:36px}
  .sec-head{flex-wrap:wrap;gap:8px 12px}
  .sec-head h2{white-space:normal}
  .sec-rule{display:none}
  .art-row h3{font-size:1.08rem}
  .art-row p{font-size:.88rem}
  .art-row .arrow{display:none}
  .page{padding-top:24px}
  .article{font-size:1.02rem}
  .toc ol{columns:1}
  .toc{padding:18px}
  .closing{padding:22px 20px}
  .foot-inner{gap:20px}
  .read-progress{height:2px}
}

@media (max-width:420px){
  .brand-mark{width:32px;height:32px;flex-basis:32px;font-size:1rem}
  .hero-lens{width:min(214px,66vw)}
  .hero-name{font-size:clamp(1.9rem,8.4vw,2.2rem)}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .hero-lens img{transform:none}
}