/* Kilowat - design system
   Kierunek: chalk & petrol + sygnal. Bricolage Grotesque / Spectral / IBM Plex Mono. */

:root{
  --bg: oklch(0.974 0.006 165);
  --bg-deep: oklch(0.955 0.009 168);
  --surface: #ffffff;
  --surface-2: oklch(0.985 0.004 165);
  --ink: oklch(0.23 0.027 190);
  --ink-soft: oklch(0.33 0.024 190);
  --muted: oklch(0.45 0.018 190);
  --muted-2: oklch(0.55 0.014 190);
  --brand: oklch(0.44 0.085 196);
  --brand-ink: oklch(0.32 0.075 197);
  --brand-soft: oklch(0.94 0.022 190);
  --signal: oklch(0.855 0.155 92);
  --signal-soft: oklch(0.96 0.055 95);
  --line: oklch(0.895 0.011 185);
  --line-soft: oklch(0.935 0.008 185);
  --warn-bg: oklch(0.955 0.035 55);
  --warn-line: oklch(0.72 0.12 55);
  --header-h: 66px;
  --sidebar-w: 296px;
  --radius: 6px;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --shadow-pop: 0 8px 24px oklch(0.23 0.027 190 / 0.10);
  --font-display: "Bricolage Grotesque", "Segoe UI", sans-serif;
  --font-body: "Spectral", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

@media (prefers-color-scheme: dark){
  :root{
    --bg: oklch(0.185 0.016 200);
    --bg-deep: oklch(0.155 0.014 200);
    --surface: oklch(0.225 0.018 200);
    --surface-2: oklch(0.205 0.017 200);
    --ink: oklch(0.945 0.008 175);
    --ink-soft: oklch(0.88 0.011 178);
    --muted: oklch(0.775 0.014 182);
    --muted-2: oklch(0.68 0.014 184);
    --brand: oklch(0.79 0.095 192);
    --brand-ink: oklch(0.86 0.075 192);
    --brand-soft: oklch(0.28 0.03 195);
    --signal: oklch(0.865 0.15 92);
    --signal-soft: oklch(0.30 0.045 92);
    --line: oklch(0.32 0.017 195);
    --line-soft: oklch(0.27 0.015 195);
    --warn-bg: oklch(0.27 0.045 55);
    --warn-line: oklch(0.62 0.11 55);
    --shadow-pop: 0 10px 28px oklch(0 0 0 / 0.45);
  }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:18px;
  line-height:1.72;
  color:var(--ink);
  background:var(--bg);
  background-image:
    radial-gradient(60rem 40rem at 90% -10%, oklch(0.94 0.03 190 / 0.55), transparent 62%),
    radial-gradient(48rem 34rem at -10% 8%, oklch(0.96 0.045 95 / 0.35), transparent 60%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
@media (prefers-color-scheme: dark){
  body{background-image:
    radial-gradient(60rem 40rem at 92% -12%, oklch(0.36 0.05 195 / 0.42), transparent 60%),
    radial-gradient(42rem 30rem at -8% 6%, oklch(0.30 0.05 92 / 0.20), transparent 58%);}
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-ink)}
::selection{background:var(--signal);color:oklch(0.23 0.05 90)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:2px}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:650;letter-spacing:-0.022em;text-wrap:balance;line-height:1.12;color:var(--ink)}

/* ---------- header ---------- */
.app-header{
  position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:60;
  background:color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:100%;max-width:1560px;margin:0 auto;padding:0 22px;
  display:flex;align-items:center;gap:20px;
}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);flex-shrink:0}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:30px;height:30px;display:grid;place-items:center;border-radius:5px;
  background:var(--ink);color:var(--signal);
}
.brand-mark svg{width:18px;height:18px}
.brand-text{font-family:var(--font-display);font-weight:750;font-size:1.22rem;letter-spacing:-0.03em}
.brand-sub{
  font-family:var(--font-mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);padding-left:9px;margin-left:2px;border-left:1px solid var(--line);
}
@media (max-width:600px){.brand-sub{display:none}}

.search-box{position:relative;margin-left:auto;width:min(340px,38vw)}
.search-icon{position:absolute;left:11px;top:50%;transform:translateY(-50%);width:15px;height:15px;color:var(--muted-2);pointer-events:none}
#searchInput{
  width:100%;height:38px;padding:0 12px 0 34px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);color:var(--ink);font-family:var(--font-display);font-size:.9rem;
  transition:border-color 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}
#searchInput::placeholder{color:var(--muted-2)}
#searchInput:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in oklab, var(--brand) 16%, transparent)}
.search-results{
  position:absolute;top:calc(100% + 7px);left:0;right:0;max-height:min(64vh,460px);overflow:auto;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-pop);
  padding:6px;z-index:70;
}
.search-results a{display:block;padding:9px 10px;border-radius:4px;color:var(--ink);font-family:var(--font-display);font-size:.88rem;line-height:1.35}
.search-results a span{display:block;font-family:var(--font-body);font-size:.8rem;color:var(--muted);margin-top:2px}
.search-results a:hover{background:var(--brand-soft)}
.search-empty{padding:12px;font-size:.86rem;color:var(--muted)}

.menu-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);cursor:pointer;padding:0;place-items:center;
}
.menu-toggle span{display:block;width:17px;height:1.6px;background:var(--ink);margin:3.4px auto;transition:transform 180ms var(--ease-out), opacity 140ms}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- layout ---------- */
.layout{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr);max-width:1560px;margin:0 auto;padding-top:var(--header-h);min-height:100vh}
.sidebar{
  position:sticky;top:var(--header-h);height:calc(100vh - var(--header-h));
  overflow-y:auto;overscroll-behavior:contain;
  border-right:1px solid var(--line);
  padding:26px 16px 48px 22px;
  scrollbar-width:thin;scrollbar-color:var(--line) transparent;
}
.sidebar::-webkit-scrollbar{width:6px}
.sidebar::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}
.main{min-width:0;padding:0 clamp(20px,3.4vw,52px) 72px}
.inner{max-width:1000px}

.nav-home{
  display:flex;align-items:center;gap:8px;font-family:var(--font-display);font-weight:600;font-size:.95rem;
  color:var(--ink);padding:8px 10px;border-radius:5px;margin-bottom:14px;
}
.nav-home:hover{background:var(--surface-2);color:var(--ink)}
.nav-home svg{width:15px;height:15px;color:var(--brand)}
.nav-section{margin-bottom:20px}
.nav-section-title{
  display:flex;align-items:baseline;gap:8px;
  font-family:var(--font-mono);font-size:.655rem;letter-spacing:.13em;text-transform:uppercase;
  color:var(--muted-2);padding:0 10px;margin:0 0 7px;
}
.nav-section-title b{font-weight:400;color:var(--brand)}
.sidebar-link{
  display:block;font-family:var(--font-display);font-size:.95rem;line-height:1.35;
  color:var(--ink-soft);padding:6px 10px 6px 12px;border-radius:5px;border-left:2px solid transparent;
  transition:background 140ms var(--ease-out), color 140ms var(--ease-out), border-color 140ms;
}
.sidebar-link:hover{background:var(--surface-2);color:var(--ink)}
.sidebar-link.active{background:var(--brand-soft);color:var(--brand-ink);border-left-color:var(--brand);font-weight:600}
@media (prefers-color-scheme: dark){.sidebar-link.active{color:var(--ink)}}

/* ---------- home hero ---------- */
.hero{
  display:grid;grid-template-columns:minmax(0,1.06fr) minmax(0,.94fr);gap:clamp(24px,3.4vw,52px);
  align-items:center;padding:clamp(30px,4.2vw,56px) 0 clamp(26px,3vw,40px);
  border-bottom:1px solid var(--line);
}
.hero-brand{
  font-family:var(--font-display);font-weight:800;letter-spacing:-0.045em;
  font-size:clamp(2.5rem,5.6vw,4.1rem);line-height:.92;margin:0 0 14px;color:var(--ink);
}
.hero-brand .mark{position:relative;display:inline-block}
.hero-brand .mark::after{
  content:"";position:absolute;left:-.02em;right:-.02em;bottom:.055em;height:.30em;
  background:var(--signal);z-index:-1;transform:scaleX(0);transform-origin:left;
  animation:markIn 620ms var(--ease-out) 220ms forwards;
}
.hero-cat{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);
  display:flex;align-items:center;gap:9px;margin:0 0 18px;
}
.hero-cat::after{content:"";flex:1;height:1px;background:var(--line)}
.hero h1{
  font-size:clamp(1.72rem,3.05vw,2.42rem);line-height:1.1;margin:0 0 16px;font-weight:600;max-width:22ch;
}
.hero-lede{
  font-family:var(--font-body);font-size:1.075rem;line-height:1.62;color:var(--ink-soft);margin:0 0 26px;max-width:44ch;
}
.hero-cta{display:flex;flex-wrap:wrap;align-items:center;gap:16px}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-display);font-size:.95rem;font-weight:650;letter-spacing:-.01em;
  padding:12px 20px;border-radius:var(--radius);background:var(--ink);color:var(--bg);
  transition:transform 150ms var(--ease-out), background 180ms var(--ease-out);
}
.btn:hover{background:var(--brand-ink);color:var(--bg)}
.btn:active{transform:scale(.975)}
.btn svg{width:15px;height:15px}
.btn-quiet{
  font-family:var(--font-display);font-size:.92rem;color:var(--brand);border-bottom:1px solid color-mix(in oklab,var(--brand) 40%,transparent);
  padding-bottom:2px;transition:border-color 160ms;
}
.btn-quiet:hover{border-color:var(--brand)}

/* instrument panel - real data as the hero visual */
.instrument{
  border:1px solid var(--line);background:var(--surface);border-radius:var(--radius);
  padding:18px 18px 12px;position:relative;
}
.inst-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px;margin-bottom:4px}
.inst-title{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted)}
.inst-live{font-family:var(--font-mono);font-size:.66rem;color:var(--brand);display:flex;align-items:center;gap:5px}
.inst-live::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);animation:pulse 2.4s ease-in-out infinite}
.inst-chart{width:100%;height:auto;margin-top:6px;overflow:visible}
.inst-axis{stroke:var(--line);stroke-width:1}
.inst-tick{font-family:var(--font-mono);font-size:9px;fill:var(--muted-2)}
.inst-curve{fill:none;stroke:var(--brand);stroke-width:2.4;stroke-linecap:round;stroke-dasharray:520;stroke-dashoffset:520;animation:draw 1500ms var(--ease-out) 320ms forwards}
.inst-area{fill:color-mix(in oklab, var(--brand) 12%, transparent);opacity:0;animation:fadeIn 700ms ease 900ms forwards}
.inst-pin{fill:var(--signal);stroke:var(--brand-ink);stroke-width:1.2}
.inst-note{font-family:var(--font-mono);font-size:.655rem;line-height:1.5;color:var(--muted);margin:10px 0 4px;border-top:1px solid var(--line-soft);padding-top:9px}

/* cost ruler */
.ruler{padding:clamp(30px,3.6vw,48px) 0;border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:6px}
.sec-label{
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.15em;text-transform:uppercase;color:var(--brand);
}
.ruler h2{font-size:clamp(1.35rem,2.2vw,1.75rem);margin:0 0 8px}
.ruler-sub{font-size:1rem;color:var(--muted);margin:0 0 26px;max-width:62ch}
.bars{display:grid;gap:16px;max-width:760px}
.bar-row{display:grid;grid-template-columns:150px minmax(0,1fr) 92px;align-items:center;gap:14px}
.bar-name{font-family:var(--font-display);font-size:.92rem;font-weight:600;line-height:1.25}
.bar-name em{display:block;font-family:var(--font-mono);font-style:normal;font-size:.66rem;color:var(--muted);letter-spacing:.04em;margin-top:2px}
.bar-track{height:14px;background:var(--bg-deep);border-radius:2px;overflow:hidden;position:relative}
.bar-fill{height:100%;width:0;background:var(--brand);border-radius:2px;transition:width 900ms var(--ease-out)}
.bar-row:nth-child(2) .bar-fill{background:oklch(0.62 0.10 196)}
.bar-row:nth-child(3) .bar-fill{background:var(--signal)}
.bar-val{font-family:var(--font-mono);font-size:.92rem;text-align:right;font-weight:500}
.bar-val small{display:block;font-size:.62rem;color:var(--muted);font-weight:400;letter-spacing:.03em}
.bars figcaption{font-family:var(--font-mono);font-size:.655rem;color:var(--muted);line-height:1.55;margin-top:18px;padding-top:12px;border-top:1px solid var(--line-soft);max-width:70ch}

/* article list sections */
.home-section{padding:clamp(30px,3.4vw,44px) 0;border-bottom:1px solid var(--line)}
.home-section h2{font-size:1.32rem;margin:0 0 4px;letter-spacing:-.02em}
.home-section .sec-desc{font-size:.95rem;color:var(--muted);margin:0 0 20px;font-family:var(--font-body)}
.art-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 34px}
.art-list li{border-top:1px solid var(--line-soft)}
.art-row{display:block;padding:13px 2px 14px;color:var(--ink);transition:transform 160ms var(--ease-out)}
.art-row:hover{transform:translateX(3px);color:var(--ink)}
.art-row:hover .art-title{color:var(--brand-ink)}
@media (prefers-color-scheme: dark){.art-row:hover .art-title{color:var(--brand)}}
.art-title{font-family:var(--font-display);font-size:.98rem;font-weight:600;line-height:1.3;letter-spacing:-.012em;display:flex;gap:8px;align-items:baseline;transition:color 140ms}
.art-title .ico{font-size:.9rem;line-height:1;flex-shrink:0;opacity:.85}
.art-ex{display:block;font-family:var(--font-body);font-size:.855rem;line-height:1.5;color:var(--muted);margin-top:4px}

/* editorial band */
.band{margin:clamp(30px,3.6vw,46px) 0 0;border-top:1px solid var(--line);padding-top:clamp(26px,3vw,38px)}
.band figure{margin:0}
.band img{width:100%;aspect-ratio:2/0.86;object-fit:cover;border-radius:var(--radius);background:var(--bg-deep)}
.band figcaption{font-family:var(--font-mono);font-size:.655rem;color:var(--muted);letter-spacing:.02em;margin-top:9px}

/* ---------- article ---------- */
.article{padding-top:clamp(26px,3.4vw,44px);max-width:78ch}
.crumbs{font-family:var(--font-mono);font-size:.655rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs span{color:var(--line);margin:0 7px}
.article h1{font-size:clamp(1.86rem,3.2vw,2.6rem);margin:0 0 14px;font-weight:650;letter-spacing:-.03em}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 14px;font-family:var(--font-mono);font-size:.66rem;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:22px}
.article-meta b{color:var(--brand);font-weight:500}
.lede{font-size:1.1rem;line-height:1.62;color:var(--ink-soft);margin:0 0 22px}
.article-body{font-size:18px;line-height:1.75;color:var(--ink-soft)}
.article-body p{margin:0 0 1.05em}
.article-body h2{
  font-size:1.42rem;margin:2.1em 0 .55em;letter-spacing:-.022em;font-weight:650;color:var(--ink);
  padding-bottom:.28em;position:relative;
}
.article-body h2::after{content:"";position:absolute;left:0;bottom:0;width:38px;height:3px;background:var(--signal);border-radius:2px}
.article-body h3{font-size:1.12rem;margin:1.7em 0 .4em;font-weight:650;color:var(--ink)}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:1.2em}
.article-body li{margin-bottom:.42em}
.article-body li::marker{color:var(--brand)}
.article-body strong{font-weight:600;color:var(--ink)}
.article-body a{border-bottom:1px solid color-mix(in oklab,var(--brand) 35%,transparent)}
.article-body a:hover{border-color:var(--brand)}
.article-body blockquote{
  margin:1.4em 0;padding:2px 0 2px 18px;border-left:2px solid var(--signal);
  font-size:1.03rem;color:var(--ink);
}
.article-body blockquote p:last-child{margin-bottom:0}

.table-wrap{overflow-x:auto;margin:1.5em 0;border:1px solid var(--line);border-radius:var(--radius)}
.article-body table{width:100%;border-collapse:collapse;font-family:var(--font-display);font-size:.87rem;line-height:1.45;min-width:520px;background:var(--surface)}
.article-body th{background:var(--bg-deep);text-align:left;font-weight:650;padding:10px 13px;border-bottom:1px solid var(--line);color:var(--ink);font-size:.78rem;letter-spacing:.02em;text-transform:uppercase;font-family:var(--font-mono)}
.article-body td{padding:10px 13px;border-bottom:1px solid var(--line-soft);vertical-align:top;color:var(--ink-soft)}
.article-body tr:last-child td{border-bottom:0}
.article-body tbody tr:hover{background:var(--surface-2)}

.info-box,.warn-box{
  margin:1.5em 0;padding:15px 17px;border-radius:var(--radius);border:1px solid var(--line);
  background:var(--brand-soft);color:var(--ink);font-size:.95rem;line-height:1.62;
}
.info-box p:last-child,.warn-box p:last-child{margin-bottom:0}
.info-box strong,.warn-box strong{color:var(--brand-ink)}
.warn-box{background:var(--warn-bg);border-color:color-mix(in oklab,var(--warn-line) 40%,var(--line))}
.warn-box strong{color:var(--ink)}
.box-label{
  display:block;font-family:var(--font-mono);font-size:.63rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-ink);margin-bottom:5px;
}
.warn-box .box-label{color:oklch(0.45 0.13 45)}
@media (prefers-color-scheme: dark){.warn-box .box-label{color:var(--signal)}}

.faq-item{border-top:1px solid var(--line-soft);padding:4px 0}
.faq-item h3{margin:.9em 0 .3em;font-size:1.02rem}
.faq-item p{margin:0 0 1em}
dl.glossary{margin:1.4em 0;display:grid;gap:0}
dl.glossary dt{font-family:var(--font-display);font-weight:650;font-size:1rem;color:var(--ink);padding-top:14px;border-top:1px solid var(--line-soft)}
dl.glossary dt:first-of-type{border-top:0;padding-top:0}
dl.glossary dd{margin:4px 0 14px;color:var(--ink-soft);font-size:.98rem}
.article-body dl{margin:1.4em 0}
.article-body dt{font-family:var(--font-display);font-weight:650;font-size:1rem;color:var(--ink);padding-top:14px;border-top:1px solid var(--line-soft)}
.article-body dt:first-of-type{border-top:0;padding-top:0}
.article-body dd{margin:4px 0 14px;color:var(--ink-soft);font-size:.98rem}

/* ---------- boxy treści (subagenci używają warning-box / tip-box / key-takeaways) ---------- */
.warning-box{
  margin:1.5em 0;padding:15px 17px;border-radius:var(--radius);
  border:1px solid color-mix(in oklab,oklch(0.62 0.15 45) 38%,var(--line));
  background:color-mix(in oklab,oklch(0.72 0.12 45) 12%,var(--surface));
  color:var(--ink);font-size:.95rem;line-height:1.62;
}
.tip-box{
  margin:1.5em 0;padding:15px 17px;border-radius:var(--radius);
  border:1px solid color-mix(in oklab,var(--brand) 32%,var(--line));
  background:color-mix(in oklab,var(--brand) 9%,var(--surface));
  color:var(--ink);font-size:.95rem;line-height:1.62;
}
.warning-box p:last-child,.tip-box p:last-child,.key-takeaways p:last-child{margin-bottom:0}
.warning-box strong,.tip-box strong{color:var(--ink)}
.key-takeaways{
  margin:1.8em 0;padding:18px 20px;border-radius:var(--radius);
  background:var(--bg-deep);border:1px solid var(--line);
  color:var(--ink);font-size:.96rem;line-height:1.65;
}
.key-takeaways h3,.key-takeaways h2{
  margin:0 0 .5em;font-size:.72rem;font-family:var(--font-mono);letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand-ink);font-weight:600;
}
.key-takeaways h3::after,.key-takeaways h2::after{display:none}
.key-takeaways ul{margin:0;padding-left:1.1em}
.key-takeaways li{margin-bottom:.4em}
.key-takeaways li::marker{color:var(--signal)}

/* ---------- FAQ: details/summary ---------- */
details.faq-item{border-top:1px solid var(--line-soft);padding:0}
details.faq-item summary{
  cursor:pointer;list-style:none;padding:15px 30px 15px 0;position:relative;
  font-family:var(--font-display);font-weight:600;font-size:1rem;color:var(--ink);
  transition:color 140ms ease-out;
}
details.faq-item summary::-webkit-details-marker{display:none}
details.faq-item summary::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-family:var(--font-mono);font-size:1.05rem;color:var(--brand);line-height:1;
}
details.faq-item[open] summary::after{content:"\2212"}
details.faq-item summary:hover{color:var(--brand-ink)}
details.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:3px}
details.faq-item p{margin:0 0 16px;color:var(--ink-soft);font-size:.97rem;max-width:68ch}
details.faq-item[open] summary{padding-bottom:8px}

/* ---------- figure w artykule ---------- */
.article-body figure{margin:2.1em 0}
.article-body figure img{width:100%;height:auto;border-radius:var(--radius);display:block;border:1px solid var(--line)}
.article-body figcaption{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.02em;color:var(--muted);
  margin-top:8px;line-height:1.5;
}

.toc{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);
  padding:14px 18px 16px;margin:0 0 28px;
}
.toc p{font-family:var(--font-mono);font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0 0 8px}
.toc ol{margin:0;padding-left:1.15em;columns:2;column-gap:26px;font-family:var(--font-display);font-size:.86rem;line-height:1.5}
.toc li{margin-bottom:5px;break-inside:avoid}
@media (max-width:700px){.toc ol{columns:1}}

.article-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:46px;padding-top:22px;border-top:1px solid var(--line)}
.article-nav a{border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;background:var(--surface);color:var(--ink);transition:border-color 160ms,transform 160ms var(--ease-out)}
.article-nav a:hover{border-color:var(--brand);transform:translateY(-2px)}
.article-nav span{display:block;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.article-nav b{font-family:var(--font-display);font-weight:600;font-size:.93rem;line-height:1.35;display:block}
.article-nav .next{text-align:right}
@media (max-width:600px){.article-nav{grid-template-columns:1fr}}

/* ---------- search / misc ---------- */
.empty{padding:64px 0;text-align:center}
.empty h1{font-size:1.9rem;margin-bottom:10px}
.empty p{color:var(--muted)}
.app-footer{border-top:1px solid var(--line);padding:34px 22px 46px;margin-top:0;background:var(--bg-deep)}
.footer-inner{max-width:1000px;margin:0 auto;display:grid;gap:10px}
.footer-brand{font-family:var(--font-display);font-weight:700;font-size:1.02rem;margin:0}
.footer-brand span{font-family:var(--font-mono);font-weight:400;font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-left:6px}
.footer-note{font-size:.83rem;line-height:1.6;color:var(--muted);max-width:72ch;margin:0}
.footer-links{display:flex;flex-wrap:wrap;gap:18px;font-family:var(--font-display);font-size:.84rem;margin:4px 0 0}
.footer-mail{font-family:var(--font-mono);font-size:.72rem;color:var(--muted);margin:0}

.sidebar-overlay{display:none}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes fadeIn{to{opacity:1}}
@keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}
@keyframes markIn{to{transform:scaleX(1)}}
.page-enter{animation:fadeUp 320ms var(--ease-out) both}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero{grid-template-columns:1fr;gap:28px}
  .instrument{order:2}
  .art-list{grid-template-columns:1fr;gap:0}
}
@media (max-width:900px){
  :root{--sidebar-w:280px}
  .layout{grid-template-columns:1fr}
  .menu-toggle{display:grid}
  .search-box{width:min(260px,42vw)}
  .sidebar{
    position:fixed;top:var(--header-h);left:0;bottom:0;height:auto;width:var(--sidebar-w);
    background:var(--surface);z-index:55;transform:translateX(-102%);
    transition:transform 280ms var(--ease-in-out);box-shadow:var(--shadow-pop);
    padding-top:20px;
  }
  body.nav-open .sidebar{transform:translateX(0)}
  .sidebar-overlay{display:block;position:fixed;inset:var(--header-h) 0 0;background:oklch(0.2 0.02 195 / .42);z-index:54;opacity:0;pointer-events:none;transition:opacity 220ms}
  body.nav-open .sidebar-overlay{opacity:1;pointer-events:auto}
  .main{padding:0 20px 56px}
  .bar-row{grid-template-columns:minmax(0,1fr) 78px;gap:6px 12px}
  .bar-track{grid-column:1/-1;order:3}
  .bar-val{text-align:right;font-size:.86rem}
}
@media (max-width:600px){
  body{font-size:17px}
  .header-inner{padding:0 14px;gap:10px}
  .search-box{width:auto;flex:1;min-width:0}
  .brand-text{font-size:1.1rem}
  .main{padding:0 16px 48px}
  .hero{padding-top:26px}
  .hero h1{font-size:1.6rem}
  .article-body{font-size:17px}
  .band img{aspect-ratio:4/3}
  .footer-inner{padding:0}
  .article-nav{gap:10px}
}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .hero-brand .mark::after{transform:scaleX(1)}
  .inst-curve{stroke-dashoffset:0}
  .inst-area{opacity:1}
  .bar-fill{width:var(--w,0)}
}
@media print{.app-header,.sidebar,.app-footer,.search-box,.menu-toggle{display:none}.layout{display:block;padding:0}.main{padding:0}}