/* ============================================================================
   PROMETHEUS — single self-contained stylesheet.
   Identity: ancient gold on obsidian. Serif display voice for headings
   (animated gold gradient flow on featured titles), clean system sans for
   readable prose, monospace voice for eyebrows, labels, code, and tabular
   data. No external fonts, no CDN, no trackers. WCAG-AA contrast in both themes.

   Theme model:
     :root                       -> dark tokens (default, obsidian + gold)
     :root[data-theme="light"]   -> light tokens (user override, ivory + gold)
     @media (prefers-color-scheme: light) :root:not([data-theme]) -> light
   main.js resolves stored/system preference and sets data-theme on <html>.
   ========================================================================== */

/* ---------- design tokens : dark (default — obsidian + gold) ---------- */
:root {
  --bg:            #0a0a0f;   /* obsidian base                    */
  --bg-elev:       #12121a;   /* raised surface                   */
  --bg-elev-2:     #1a1a24;   /* hover / inset surface            */
  --bg-inset:      #07070b;   /* deepest well (terminal)          */
  --ink:           #e8e0d4;   /* primary text   (>= 13:1 on bg)   */
  --ink-dim:       #9a9080;   /* secondary text (>= 6.5:1)        */
  --ink-faint:     #6f6857;   /* captions       (>= 4.5:1)        */
  --gold:          #DAA520;
  --gold-light:    #F5D76E;
  --gold-dark:     #B8860B;
  --sandstone:     #C5A572;
  --bronze:        #8B7355;
  --line:          #2a2820;
  --line-bright:   #423d2e;
  --ok:            #7dd3a0;
  --warn:          #EAB85C;
  --danger:        #e07a6e;
  --accent-link:   var(--gold-light);  /* link text, AA on --bg   */
  --hero-glow-a:   rgba(218, 165, 32, 0.16);
  --hero-glow-b:   rgba(184, 134, 11, 0.11);
  --hero-glow-c:   rgba(139, 115, 85, 0.09);
  --selection:     rgba(218, 165, 32, 0.30);

  --radius:        8px;
  --radius-lg:     14px;
  --radius-xl:     20px;
  --radius-pill:   999px;

  --serif: Georgia, "Times New Roman", "Playfair Display", "Iowan Old Style", "Baskerville", serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "DejaVu Sans Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "Helvetica Neue", sans-serif;

  --maxw:          1120px;
  --gutter:        clamp(1rem, 4vw, 3rem);

  --s-1: 0.25rem; --s-2: 0.5rem; --s-3: 0.75rem; --s-4: 1rem;
  --s-5: 1.5rem;  --s-6: 2rem;   --s-7: 3rem;    --s-8: 4.5rem;

  /* reusable gold gradient (text + fills) — bright tones for dark bg */
  --grad-gold: linear-gradient(100deg, var(--gold-light), var(--gold) 48%, var(--sandstone) 76%, var(--gold-light));
  --rule-gold: linear-gradient(90deg, transparent, var(--gold), transparent);
  --shadow-card: 0 1px 0 rgba(255,255,255,0.03), 0 14px 34px rgba(0,0,0,0.46);
  --shadow-gold: 0 12px 34px rgba(218,165,32,0.20), 0 2px 8px rgba(0,0,0,0.46);
  --ring-gold:   0 0 0 1px rgba(218,165,32,0.32);

  color-scheme: dark;
}

/* ---------- design tokens : light (ivory + gold) ---------- */
:root[data-theme="light"] {
  --bg:            #faf6ee;   /* warm ivory                       */
  --bg-elev:       #fffdf8;   /* raised surface                   */
  --bg-elev-2:     #f2ecdd;   /* hover / inset surface            */
  --bg-inset:      #eae2cf;   /* deepest well                     */
  --ink:           #2a2418;   /* primary text   (>= 13:1)         */
  --ink-dim:       #5c5340;   /* secondary text (>= 7:1)          */
  --ink-faint:     #857a63;   /* captions       (>= 4.5:1)        */
  --gold:          #B8860B;
  --gold-light:    #DAA520;
  --gold-dark:     #8B6508;
  --sandstone:     #9a7d4a;
  --bronze:        #6b5a44;
  --line:          #e2dac6;
  --line-bright:   #cabea3;
  --ok:            #2f7a4f;
  --warn:          #9a6a00;
  --danger:        #b2342c;
  --accent-link:   #8B6508;   /* link text on light (AA)          */
  --hero-glow-a:   rgba(184, 134, 11, 0.13);
  --hero-glow-b:   rgba(218, 165, 32, 0.09);
  --hero-glow-c:   rgba(139, 115, 85, 0.07);
  --selection:     rgba(184, 134, 11, 0.22);

  /* darker gold gradient for AA contrast on light backgrounds */
  --grad-gold: linear-gradient(100deg, var(--gold-dark), var(--gold) 48%, var(--bronze) 76%, var(--gold-dark));
  --rule-gold: linear-gradient(90deg, transparent, var(--gold-dark), transparent);
  --shadow-card: 0 1px 2px rgba(42,36,24,0.05), 0 12px 30px rgba(42,36,24,0.10);
  --shadow-gold: 0 12px 30px rgba(184,134,11,0.20), 0 2px 6px rgba(42,36,24,0.08);
  --ring-gold:   0 0 0 1px rgba(184,134,11,0.36);

  color-scheme: light;
}

/* honour the OS preference only when the user has not chosen explicitly */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --bg:            #faf6ee;
    --bg-elev:       #fffdf8;
    --bg-elev-2:     #f2ecdd;
    --bg-inset:      #eae2cf;
    --ink:           #2a2418;
    --ink-dim:       #5c5340;
    --ink-faint:     #857a63;
    --gold:          #B8860B;
    --gold-light:    #DAA520;
    --gold-dark:     #8B6508;
    --sandstone:     #9a7d4a;
    --bronze:        #6b5a44;
    --line:          #e2dac6;
    --line-bright:   #cabea3;
    --ok:            #2f7a4f;
    --warn:          #9a6a00;
    --danger:        #b2342c;
    --accent-link:   #8B6508;
    --hero-glow-a:   rgba(184, 134, 11, 0.13);
    --hero-glow-b:   rgba(218, 165, 32, 0.09);
    --hero-glow-c:   rgba(139, 115, 85, 0.07);
    --selection:     rgba(184, 134, 11, 0.22);
    --grad-gold: linear-gradient(100deg, var(--gold-dark), var(--gold) 48%, var(--bronze) 76%, var(--gold-dark));
    --rule-gold: linear-gradient(90deg, transparent, var(--gold-dark), transparent);
    --shadow-card: 0 1px 2px rgba(42,36,24,0.05), 0 12px 30px rgba(42,36,24,0.10);
    --shadow-gold: 0 12px 30px rgba(184,134,11,0.20), 0 2px 6px rgba(42,36,24,0.08);
    --ring-gold:   0 0 0 1px rgba(184,134,11,0.36);
    color-scheme: light;
  }
}

/* ---------- animated gold gradient flow (disabled under reduced motion) ---------- */
@keyframes gold-flow {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(1200px 620px at 80% -8%, var(--hero-glow-a), transparent 70%),
    radial-gradient(980px 720px at 12% 4%, var(--hero-glow-b), transparent 66%),
    radial-gradient(940px 640px at 50% 112%, var(--hero-glow-c), transparent 60%);
  background-attachment: fixed;
  line-height: 1.62;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--selection); color: var(--ink); }
img, svg { max-width: 100%; }
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.012em;
  font-family: var(--serif);
  color: var(--ink);
}
h2 { font-size: clamp(1.6rem, 1.15rem + 1.9vw, 2.35rem); margin: 0 0 var(--s-4); }
h3 { font-size: 1.18rem; margin: 0 0 var(--s-2); }
h4 { font-size: 1.02rem; margin: 0 0 var(--s-2); }
p { margin: 0 0 var(--s-4); }
a { color: var(--accent-link); text-decoration: underline; text-underline-offset: 0.18em; }
a:hover { color: var(--gold-light); }
code, pre, kbd { font-family: var(--mono); }
code {
  background: var(--bg-elev-2);
  padding: 0.12em 0.4em;
  border-radius: var(--radius);
  font-size: 0.9em;
  color: var(--gold-light);
  border: 1px solid var(--line);
}
pre {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--s-4);
  overflow-x: auto;
}
pre code { background: none; border: 0; padding: 0; color: var(--ink); font-size: 0.92rem; }
ul, ol { padding-left: 1.2rem; }
strong { color: var(--ink); }

/* ---------- focus visibility (keyboard a11y) ---------- */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
  border-radius: var(--radius);
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px; top: 0; z-index: 100;
  background: var(--grad-gold);
  color: #1a1408;
  padding: var(--s-2) var(--s-4);
  border-radius: 0 0 var(--radius) var(--radius);
  font-weight: 700;
  text-decoration: none;
}
.skip-link:focus { left: 50%; transform: translateX(-50%); }

/* ---------- layout primitives ---------- */
main { display: block; }
section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--s-7) var(--gutter);
  border-top: 1px solid var(--line);
}
section:first-of-type { border-top: 0; }
.section-lead { color: var(--ink-dim); max-width: 64ch; margin-top: 0; }
.eyebrow {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.76rem;
  color: var(--gold);
  margin: 0 0 var(--s-3);
  display: block;
}
.eyebrow::after {
  content: "";
  display: inline-block;
  width: 1.4rem; height: 1px; margin-left: 0.6rem;
  vertical-align: middle;
  background: var(--rule-gold);
}
.section-head { max-width: 72ch; margin-bottom: var(--s-5); }
.section-head h2 {
  margin-bottom: var(--s-3);
  color: var(--gold-light);
  background: var(--grad-gold);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
}

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--s-3) var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-4); flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: var(--s-3); text-decoration: none; }
.brand .logo { width: 32px; height: 32px; flex: 0 0 auto; }
.wordmark {
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0.16em;
  font-size: 1.08rem;
  color: var(--gold-light);
  background: var(--grad-gold);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 220% auto;
  animation: gold-flow 9s ease-in-out infinite;
}
.top-nav { display: flex; gap: var(--s-4); flex-wrap: wrap; align-items: center; font-size: 0.94rem; }
.top-nav a { color: var(--ink-dim); text-decoration: none; transition: color 0.18s ease; }
.top-nav a:hover { color: var(--gold-light); }
.top-nav a.gh {
  color: var(--gold-light);
  border: 1px solid var(--line-bright);
  padding: var(--s-1) var(--s-4);
  border-radius: var(--radius-pill);
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.top-nav a.gh:hover {
  background: color-mix(in srgb, var(--gold) 12%, transparent);
  border-color: var(--gold);
  color: var(--gold-light);
}

/* theme toggle */
.theme-toggle {
  appearance: none; background: var(--bg-elev-2); color: var(--ink-dim);
  border: 1px solid var(--line-bright); border-radius: var(--radius);
  width: 2.3rem; height: 2.3rem; display: inline-grid; place-items: center;
  cursor: pointer; padding: 0;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.theme-toggle:hover { color: var(--gold-light); border-color: var(--gold); background: color-mix(in srgb, var(--gold) 10%, transparent); }
.theme-toggle .icon { width: 1.15rem; height: 1.15rem; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ---------- hero ---------- */
.hero {
  padding-top: clamp(2.5rem, 6vw, 5rem); padding-bottom: var(--s-8);
  position: relative;
}
.hero::before {
  content: ""; position: absolute; inset: -2rem 0 auto 0; height: 420px;
  background: radial-gradient(560px 320px at 50% 0%, var(--hero-glow-a), transparent 70%);
  pointer-events: none; z-index: -1;
}
.hero .eyebrow { letter-spacing: 0.26em; }
.hero h1 {
  font-size: clamp(2.1rem, 1.1rem + 5.2vw, 3.6rem);
  margin: 0 0 var(--s-5);
  font-family: var(--serif);
  letter-spacing: -0.015em;
  max-width: 18ch;
}
.hero h1 .accent {
  color: var(--gold-light);
  background: var(--grad-gold);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 220% auto;
  animation: gold-flow 8s ease-in-out infinite;
}
.lead { font-size: 1.18rem; color: var(--ink-dim); max-width: 62ch; margin-bottom: var(--s-5); }
.hero-points { list-style: none; padding: 0; display: grid; gap: var(--s-3); max-width: 72ch; margin: 0 0 var(--s-6); }
.hero-points li { padding-left: var(--s-5); position: relative; color: var(--ink); }
.hero-points li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 0.6rem; height: 0.6rem;
  background: var(--grad-gold);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}
.cta-row { display: flex; gap: var(--s-3); flex-wrap: wrap; }
.cta {
  display: inline-block; padding: var(--s-3) var(--s-5);
  background: var(--grad-gold);
  background-size: 180% auto;
  color: #1a1408;
  font-weight: 700; text-decoration: none;
  border-radius: var(--radius); border: 1px solid var(--gold-dark);
  box-shadow: 0 1px 0 rgba(255,255,255,0.20) inset, 0 8px 22px rgba(218,165,32,0.22);
  transition: background-position 0.4s ease, box-shadow 0.25s ease, transform 0.15s ease;
}
.cta:hover {
  background-position: 100% 50%;
  color: #1a1408;
  box-shadow: 0 1px 0 rgba(255,255,255,0.28) inset, 0 10px 30px rgba(218,165,32,0.38);
  transform: translateY(-1px);
}
.cta.ghost {
  background: transparent;
  color: var(--gold-light);
  border: 1px solid var(--line-bright);
  box-shadow: none;
}
.cta.ghost:hover {
  background: color-mix(in srgb, var(--gold) 10%, transparent);
  border-color: var(--gold);
  color: var(--gold-light);
  box-shadow: var(--ring-gold);
}

/* quick install strip in hero */
.hero-cmd {
  margin-top: var(--s-6); max-width: 760px;
}
.hero-cmd .cmd-block { margin-top: 0; }

/* ---------- OS tabs ---------- */
.tablist-wrap { margin-top: var(--s-5); }
.tablist { display: flex; gap: 0; border-bottom: 1px solid var(--line); }
.tab {
  appearance: none; background: transparent; border: 0;
  border-bottom: 3px solid transparent;
  color: var(--ink-dim);
  font-family: var(--mono); font-size: 0.96rem; font-weight: 600;
  padding: var(--s-3) var(--s-4); cursor: pointer; margin-bottom: -1px;
  letter-spacing: 0.02em;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.tab:hover { color: var(--gold-light); }
.tab[aria-selected="true"] { color: var(--gold-light); border-bottom-color: var(--gold); }
.tabpanel { padding-top: var(--s-5); }
.os-note { color: var(--ink-dim); max-width: 70ch; }

/* command block */
.cmd-block {
  display: flex; align-items: stretch; gap: 0;
  margin-top: var(--s-4);
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  overflow: hidden;
  background: color-mix(in srgb, var(--bg-elev) 78%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
}
.cmd-block .cmd {
  flex: 1 1 auto; display: block;
  font-family: var(--mono); font-size: 0.95rem; color: var(--ink);
  background: none; border: 0; padding: var(--s-4);
  white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word;
}
.cmd-block .cmd::before { content: "$ "; color: var(--gold); font-weight: 700; }
.copy-btn {
  flex: 0 0 auto; appearance: none; border: 0;
  border-left: 1px solid var(--line);
  background: var(--bg-elev-2); color: var(--ink-dim);
  font-family: var(--mono); font-weight: 700; letter-spacing: 0.06em;
  padding: 0 var(--s-5); cursor: pointer; font-size: 0.9rem; min-width: 5.5rem;
  transition: background-color 0.18s ease, color 0.18s ease;
}
.copy-btn:hover { background: color-mix(in srgb, var(--gold) 14%, var(--bg-elev)); color: var(--gold-light); }
.copy-btn.copied { background: var(--ok); color: #06240f; }
.copy-btn.copied .copy-label::after { content: " — Copied"; }
.copy-btn[aria-disabled="true"] { cursor: not-allowed; opacity: 0.7; }

.manual-alt { margin-top: var(--s-4); max-width: 80ch; }
.manual-alt > summary {
  cursor: pointer; font-family: var(--mono); font-size: 0.95rem;
  color: var(--accent-link); padding: var(--s-2) 0;
}
.manual-code { margin-top: var(--s-3); }

.no-track {
  margin-top: var(--s-5); padding: var(--s-3) var(--s-4);
  border-left: 3px solid var(--gold);
  background: color-mix(in srgb, var(--gold) 8%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-radius: var(--radius); color: var(--ink-dim); font-size: 0.95rem;
}

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; }
.matrix, .cmd-table, .pk-table { width: 100%; border-collapse: collapse; font-size: 0.96rem; }
.matrix th, .matrix td, .cmd-table th, .cmd-table td, .pk-table th, .pk-table td {
  text-align: left; padding: var(--s-3) var(--s-4);
  border-bottom: 1px solid var(--line); vertical-align: top;
}
.matrix th, .cmd-table th, .pk-table th {
  font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.1em;
  font-size: 0.74rem; color: var(--sandstone);
  border-bottom: 1px solid color-mix(in srgb, var(--gold) 34%, var(--line));
}
.pk-table tbody tr:hover, .cmd-table tbody tr:hover, .matrix tbody tr:hover {
  background: color-mix(in srgb, var(--gold) 6%, transparent);
}
caption, .caption {
  caption-side: top; text-align: left; color: var(--ink-faint);
  font-size: 0.85rem; padding-bottom: var(--s-2);
}
.badge {
  font-family: var(--mono); font-size: 0.74rem; font-weight: 700;
  padding: 0.15em 0.6em; border-radius: var(--radius-pill);
  letter-spacing: 0.04em; white-space: nowrap;
}
.badge.ok { background: color-mix(in srgb, var(--ok) 16%, transparent); color: var(--ok); border: 1px solid color-mix(in srgb, var(--ok) 45%, transparent); }
.badge.no { background: color-mix(in srgb, var(--danger) 14%, transparent); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent); }
.badge.warn { background: color-mix(in srgb, var(--warn) 16%, transparent); color: var(--warn); border: 1px solid color-mix(in srgb, var(--warn) 45%, transparent); }

/* ---------- generic cards / grids ---------- */
.grid-two { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--s-4); }
.grid-three { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--s-4); }
.card {
  position: relative; overflow: hidden;
  background: color-mix(in srgb, var(--bg-elev) 72%, transparent);
  -webkit-backdrop-filter: blur(12px) saturate(125%);
  backdrop-filter: blur(12px) saturate(125%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: var(--s-5);
  box-shadow: var(--shadow-card);
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), var(--gold-light), var(--gold), transparent);
  opacity: 0; transition: opacity 0.28s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--gold) 42%, var(--line));
  box-shadow: var(--shadow-gold);
}
.card:hover::before { opacity: 1; }
.card h3 { font-family: var(--serif); color: var(--gold-light); letter-spacing: 0.01em; }
.card ul { margin: 0; color: var(--ink-dim); }
.disclosure { max-width: 80ch; line-height: 1.7; }
.disclosure li { margin-bottom: var(--s-3); }
.steps { list-style: none; padding: 0; display: grid; gap: var(--s-5); max-width: 82ch; }
.steps > li {
  border-left: 2px solid var(--line-bright);
  padding-left: var(--s-5);
  transition: border-color 0.25s ease;
}
.steps > li:hover { border-left-color: var(--gold); }
.steps h3 { font-family: var(--serif); color: var(--ink); }
.steps p { color: var(--ink-dim); margin: 0; }
.bundle-sizes { margin-top: var(--s-3); color: var(--ink-dim); }

/* accordion */
.accordion { display: grid; gap: var(--s-2); max-width: 82ch; }
.accordion details {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: color-mix(in srgb, var(--bg-elev) 72%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: var(--s-3) var(--s-4);
  transition: border-color 0.22s ease, background 0.22s ease;
}
.accordion details:hover { border-color: color-mix(in srgb, var(--gold) 35%, var(--line)); }
.accordion summary { cursor: pointer; font-weight: 700; color: var(--ink); font-family: var(--mono); font-size: 0.95rem; }
.accordion summary code { color: var(--gold-light); }
.accordion details[open] { border-left: 3px solid var(--gold); }
.accordion details[open] summary { color: var(--gold-light); margin-bottom: var(--s-3); }
.accordion details p { color: var(--ink-dim); margin-top: 0; }
.accordion pre { margin: var(--s-2) 0; }

/* ---------- packages comparison ---------- */
.pk-toolbar {
  display: flex; flex-wrap: wrap; gap: var(--s-4); align-items: end;
  margin-bottom: var(--s-5);
}
.pk-control { display: grid; gap: var(--s-1); }
.pk-control label { font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.72rem; color: var(--ink-faint); }
.pk-control select {
  appearance: none; font-family: var(--mono); font-size: 0.92rem;
  background: var(--bg-elev); color: var(--ink);
  border: 1px solid var(--line-bright); border-radius: var(--radius);
  padding: var(--s-2) var(--s-3); cursor: pointer;
  transition: border-color 0.18s ease;
}
.pk-control select:hover { border-color: var(--gold); }
.pk-view { display: inline-flex; border: 1px solid var(--line-bright); border-radius: var(--radius-pill); overflow: hidden; }
.pk-view button {
  appearance: none; background: var(--bg-elev-2); color: var(--ink-dim);
  border: 0; padding: var(--s-2) var(--s-4); cursor: pointer;
  font-family: var(--mono); font-size: 0.86rem;
  transition: background 0.18s ease, color 0.18s ease;
}
.pk-view button:hover { color: var(--gold-light); }
.pk-view button[aria-pressed="true"] { background: var(--grad-gold); color: #1a1408; font-weight: 700; }
.pk-status { font-family: var(--mono); font-size: 0.82rem; color: var(--ink-faint); margin-left: auto; align-self: end; }

.pk-table { font-size: 0.9rem; }
.pk-table th, .pk-table td { font-size: 0.9rem; }
.pk-table .pk-name { font-family: var(--mono); font-weight: 700; color: var(--gold-light); }
.pk-table .pk-sub { color: var(--ink-faint); font-size: 0.82rem; }
.pk-table code { font-size: 0.84rem; }
.pk-table .num { font-family: var(--mono); white-space: nowrap; color: var(--ink-dim); }

.pk-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: var(--s-4); }
.pk-card {
  position: relative; overflow: hidden;
  background: color-mix(in srgb, var(--bg-elev) 72%, transparent);
  -webkit-backdrop-filter: blur(12px) saturate(125%);
  backdrop-filter: blur(12px) saturate(125%);
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: var(--s-5); display: flex; flex-direction: column; gap: var(--s-3);
  box-shadow: var(--shadow-card);
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.pk-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), var(--gold-light), var(--gold), transparent);
  opacity: 0; transition: opacity 0.28s ease;
}
.pk-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--gold) 42%, var(--line));
  box-shadow: var(--shadow-gold);
}
.pk-card:hover::before { opacity: 1; }
.pk-card-head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-3); }
.pk-card-head h3 { font-family: var(--serif); margin: 0; color: var(--ink); }
.pk-card .pk-sub { color: var(--ink-faint); font-family: var(--mono); font-size: 0.82rem; }
.pk-card .pk-desc { color: var(--ink-dim); font-size: 0.94rem; margin: 0; }
.pk-roles { display: grid; gap: var(--s-2); }
.pk-role { display: flex; flex-wrap: wrap; gap: var(--s-2); align-items: baseline; padding: var(--s-2) 0; border-top: 1px solid var(--line); }
.pk-role:first-child { border-top: 0; }
.pk-role .role-tag { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--gold); min-width: 5.5em; }
.pk-role code { font-size: 0.84rem; }
.pk-role .opt { font-family: var(--mono); font-size: 0.7rem; color: var(--ink-faint); }
.pk-meta { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-4); font-family: var(--mono); font-size: 0.8rem; color: var(--ink-dim); border-top: 1px solid var(--line); padding-top: var(--s-3); }
.pk-meta span { white-space: nowrap; }
.pk-footnote { color: var(--ink-faint); font-size: 0.88rem; margin-top: var(--s-4); max-width: 80ch; }

/* tier + status dots */
.pk-dot { display: inline-block; width: 0.5rem; height: 0.5rem; border-radius: 50%; margin-right: 0.4em; vertical-align: middle; background: var(--ink-faint); }
.tier-cpu .pk-dot { background: var(--warn); }
.tier-gpu-8 .pk-dot, .tier-gpu-12 .pk-dot, .tier-gpu-24 .pk-dot { background: var(--gold); }
.tier-addon .pk-dot { background: var(--gold-light); }
.status-stable .pk-dot { background: var(--ok); }
.status-experimental .pk-dot { background: var(--warn); }

/* ---------- quota local vs cloud ---------- */
.vs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--s-4); }
.vs-col {
  border: 1px solid var(--line); border-radius: var(--radius-lg); padding: var(--s-5);
  background: color-mix(in srgb, var(--bg-elev) 72%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
}
.vs-col h3 { font-family: var(--serif); margin-top: 0; }
.vs-col.local { border-top: 3px solid var(--ok); }
.vs-col.cloud { border-top: 3px solid var(--warn); }
.vs-col ul { color: var(--ink-dim); margin: 0; }

/* ---------- features / mcp / modes ---------- */
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--s-4); }
.feat {
  padding: var(--s-4) 0; border-top: 1px solid var(--line);
  transition: border-color 0.25s ease;
}
.feat:first-child { border-top: 0; }
.feat:hover { border-top-color: color-mix(in srgb, var(--gold) 40%, var(--line)); }
.feat h3 { font-family: var(--serif); color: var(--ink); margin-bottom: var(--s-2); }
.feat h3 .num {
  font-family: var(--mono); font-size: 0.82em;
  color: var(--gold); margin-right: var(--s-2);
}
.feat p { color: var(--ink-dim); margin: 0; }
.modes-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--s-4); }
.mode-card {
  position: relative; overflow: hidden;
  background: color-mix(in srgb, var(--bg-elev) 72%, transparent);
  -webkit-backdrop-filter: blur(12px) saturate(125%);
  backdrop-filter: blur(12px) saturate(125%);
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: var(--s-5); border-left: 3px solid var(--gold);
  box-shadow: var(--shadow-card);
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}
.mode-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold-light), var(--gold), transparent);
  opacity: 0; transition: opacity 0.28s ease;
}
.mode-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--gold) 45%, var(--line));
  box-shadow: var(--shadow-gold);
}
.mode-card:hover::before { opacity: 1; }
.mode-card h3 { font-family: var(--serif); color: var(--ink); }
.mode-card .mode-tag { font-family: var(--mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--gold); }
.mode-card p { color: var(--ink-dim); }

/* changelog */
.changelog { max-width: 80ch; }
.changelog .entry { padding: var(--s-4) 0; border-top: 1px solid var(--line); }
.changelog .entry:first-child { border-top: 0; }
.changelog .ver { font-family: var(--mono); color: var(--gold-light); font-weight: 700; }
.changelog .date { color: var(--ink-faint); font-family: var(--mono); font-size: 0.82rem; margin-left: var(--s-3); }
.changelog ul { color: var(--ink-dim); margin: var(--s-2) 0 0; }

/* callouts */
.callout {
  padding: var(--s-4) var(--s-5); border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--bg-elev) 72%, transparent);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--line); border-left: 3px solid var(--gold);
  color: var(--ink-dim); max-width: 80ch;
  box-shadow: var(--shadow-card);
}

/* terminal placeholder */
.terminal-placeholder {
  border: 1px dashed var(--line-bright); border-radius: var(--radius-lg);
  overflow: hidden; background: var(--bg-inset); max-width: 78ch;
  box-shadow: var(--shadow-card);
}
.terminal-bar { display: flex; align-items: center; gap: var(--s-2); padding: var(--s-2) var(--s-3); background: var(--bg-elev); border-bottom: 1px solid var(--line); }
.terminal-bar .dot:nth-child(1) { background: var(--danger); }
.terminal-bar .dot:nth-child(2) { background: var(--warn); }
.terminal-bar .dot:nth-child(3) { background: var(--ok); }
.dot { width: 0.7rem; height: 0.7rem; border-radius: 50%; background: var(--line-bright); }
.term-title { margin-left: var(--s-3); font-family: var(--mono); font-size: 0.8rem; color: var(--ink-faint); }
.terminal-body { margin: 0; border: 0; border-radius: 0; background: none; padding: var(--s-5); color: var(--ink-dim); font-size: 0.9rem; }
.terminal-body .ph-note { color: var(--gold); font-style: italic; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: var(--s-6) var(--gutter); }
.footer-inner { max-width: var(--maxw); margin: 0 auto; display: grid; gap: var(--s-5); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--s-3) var(--s-5); }
.footer-links a { color: var(--ink-dim); text-decoration: none; transition: color 0.18s ease; }
.footer-links a:hover { color: var(--gold-light); }
.copyright { margin: 0; color: var(--ink-faint); font-size: 0.92rem; }
.copyright a { color: var(--ink-dim); }
.no-track-footer { margin: 0; font-family: var(--mono); font-size: 0.8rem; color: var(--ink-faint); }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .header-inner { padding: var(--s-3) var(--gutter); }
  .top-nav { gap: var(--s-2) var(--s-4); }
  .hero h1 { max-width: none; }
}
@media (max-width: 720px) {
  .site-header { position: static; }
  .cmd-block { flex-direction: column; }
  .copy-btn { border-left: 0; border-top: 1px solid var(--line); padding: var(--s-3); }
  .pk-table .hide-sm { display: none; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}