/* PyFE4AI project page.
   Dark first: :root holds the dark tokens; the light tokens apply under
   prefers-color-scheme: light (unless the visitor chose dark) or when the
   visitor chose light (html[data-theme]). Brand hues from the logo:
   blue #4c87c8, amber #f69e0b, teal #22c7b7, gray #aeaeae. */

:root {
  color-scheme: dark;
  --bg: #050913;
  --bg-alt: #080e1d;
  --surface: #0d1529;
  --card: rgba(16, 25, 47, 0.66);
  --card-hi: rgba(22, 34, 62, 0.8);
  --card-border: rgba(130, 160, 215, 0.15);
  --card-border-hi: rgba(118, 174, 240, 0.42);
  --line: rgba(130, 158, 205, 0.16);
  --line-strong: rgba(130, 158, 205, 0.3);
  --grid: rgba(118, 150, 215, 0.075);
  --ink: #e8eef8;
  --ink-2: #a9b6ca;
  --ink-3: #8b9bb3;
  --blue: #7cb2f2;
  --amber: #f7ae33;
  --teal: #3ddccb;
  --slate: #9aaac3;
  --red: #f4837b;
  --brand-blue: #4c87c8;
  --brand-amber: #f69e0b;
  --brand-teal: #22c7b7;
  --brand-gray: #aeaeae;
  --glow-blue: rgba(76, 135, 200, 0.34);
  --glow-teal: rgba(34, 199, 183, 0.26);
  --glow-amber: rgba(246, 158, 11, 0.2);
  --btn-ink: #04101d;
  --btn-grad: linear-gradient(135deg, #6aa6ea 0%, #3ddccb 100%);
  --text-grad: linear-gradient(100deg, #7cb2f2 0%, #3ddccb 55%, #f7ae33 100%);
  --code-bg: #08101f;
  --code-head: #0c1529;
  --nav-bg: rgba(5, 9, 19, 0.72);
  --shadow: 0 18px 50px -24px rgba(0, 0, 0, 0.7);
  --noise-opacity: 0.05;
  /* diagram tokens */
  --d-node: #0f1830;
  --d-node-on: #12284a;
  --d-stroke: rgba(140, 168, 215, 0.34);
  --d-edge: rgba(140, 168, 215, 0.26);
  --d-pkt: #f7ae33;
  --d-res: #0f2a2b;
  /* type */
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --radius: 16px;
  --radius-sm: 10px;
  --gutter: 16px;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #f5f8fc;
    --bg-alt: #edf2f9;
    --surface: #ffffff;
    --card: rgba(255, 255, 255, 0.82);
    --card-hi: #ffffff;
    --card-border: rgba(28, 58, 110, 0.13);
    --card-border-hi: rgba(35, 94, 163, 0.45);
    --line: rgba(22, 48, 96, 0.12);
    --line-strong: rgba(22, 48, 96, 0.24);
    --grid: rgba(30, 72, 140, 0.065);
    --ink: #0c1626;
    --ink-2: #435168;
    --ink-3: #55647b;
    --blue: #235ea3;
    --amber: #8a5600;
    --teal: #0a7066;
    --slate: #55647b;
    --red: #b3372f;
    --glow-blue: rgba(76, 135, 200, 0.22);
    --glow-teal: rgba(34, 199, 183, 0.18);
    --glow-amber: rgba(246, 158, 11, 0.14);
    --btn-ink: #ffffff;
    --btn-grad: linear-gradient(135deg, #2a64aa 0%, #0b7569 100%);
    --text-grad: linear-gradient(100deg, #235ea3 0%, #0a7066 60%, #8a5600 100%);
    --code-bg: #0b1324;
    --code-head: #111b31;
    --nav-bg: rgba(245, 248, 252, 0.78);
    --shadow: 0 18px 44px -26px rgba(20, 40, 80, 0.35);
    --noise-opacity: 0.03;
    --d-node: #ffffff;
    --d-node-on: #e6f0fb;
    --d-stroke: rgba(30, 60, 110, 0.28);
    --d-edge: rgba(30, 60, 110, 0.22);
    --d-pkt: #e08a00;
    --d-res: #e3f6f3;
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f8fc;
  --bg-alt: #edf2f9;
  --surface: #ffffff;
  --card: rgba(255, 255, 255, 0.82);
  --card-hi: #ffffff;
  --card-border: rgba(28, 58, 110, 0.13);
  --card-border-hi: rgba(35, 94, 163, 0.45);
  --line: rgba(22, 48, 96, 0.12);
  --line-strong: rgba(22, 48, 96, 0.24);
  --grid: rgba(30, 72, 140, 0.065);
  --ink: #0c1626;
  --ink-2: #435168;
  --ink-3: #55647b;
  --blue: #235ea3;
  --amber: #8a5600;
  --teal: #0a7066;
  --slate: #55647b;
  --red: #b3372f;
  --glow-blue: rgba(76, 135, 200, 0.22);
  --glow-teal: rgba(34, 199, 183, 0.18);
  --glow-amber: rgba(246, 158, 11, 0.14);
  --btn-ink: #ffffff;
  --btn-grad: linear-gradient(135deg, #2a64aa 0%, #0b7569 100%);
  --text-grad: linear-gradient(100deg, #235ea3 0%, #0a7066 60%, #8a5600 100%);
  --code-bg: #0b1324;
  --code-head: #111b31;
  --nav-bg: rgba(245, 248, 252, 0.78);
  --shadow: 0 18px 44px -26px rgba(20, 40, 80, 0.35);
  --noise-opacity: 0.03;
  --d-node: #ffffff;
  --d-node-on: #e6f0fb;
  --d-stroke: rgba(30, 60, 110, 0.28);
  --d-edge: rgba(30, 60, 110, 0.22);
  --d-pkt: #e08a00;
  --d-res: #e3f6f3;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); font-size: 16px; line-height: 1.6;
  text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before { /* film grain, fixed, decorative */
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: var(--noise-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
h1, h2, h3, h4 { margin: 0; line-height: 1.15; text-wrap: balance; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
a { color: var(--blue); text-decoration: none; text-underline-offset: 3px; }
a:hover { text-decoration: underline; }
code, kbd, pre, .mono { font-family: var(--mono); }
:not(pre) > code {
  font-size: 0.86em; padding: 0.1em 0.38em; border-radius: 6px;
  background: color-mix(in srgb, var(--ink) 8%, transparent); overflow-wrap: anywhere;
}
:focus-visible { outline: 2px solid var(--teal); outline-offset: 3px; border-radius: 4px; }
/* inside scroll boxes the ring goes inwards, so that it is not clipped */
.ctabs [role="tab"]:focus-visible, .cell:focus-visible, .code pre:focus-visible { outline-offset: -2px; }
/* scroll boxes contain their absolutely positioned (.sr-only) descendants */
.matrix-scroll, .table-scroll, .stage-svg, .compare-wrap, .code pre, .ctabs { position: relative; }
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: 12px; top: -60px; z-index: 100; padding: 8px 14px; border-radius: 8px;
  background: var(--surface); color: var(--ink); border: 1px solid var(--line-strong);
}
.skip:focus { top: 12px; }

.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding-inline: var(--gutter); }
@media (min-width: 768px) { :root { --gutter: 28px; } }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50; background: var(--nav-bg);
  -webkit-backdrop-filter: blur(14px) saturate(150%); backdrop-filter: blur(14px) saturate(150%);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 12px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; font-size: 19px; letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.brand svg { width: 30px; height: 30px; flex: none; }
.wordmark .w-py { color: var(--brand-blue); }
.wordmark .w-fe { color: var(--brand-amber); }
.wordmark .w-4 { color: var(--brand-gray); }
.wordmark .w-ai { color: var(--brand-teal); }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a {
  color: var(--ink-2); font-size: 14.5px; font-weight: 550; padding: 7px 10px; border-radius: 8px;
}
.nav-links a:hover, .nav-links a[aria-current="true"] { color: var(--ink); background: color-mix(in srgb, var(--ink) 7%, transparent); text-decoration: none; }
.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: 8px; }
.icon-btn {
  display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--line); background: transparent; color: var(--ink-2); cursor: pointer;
}
.icon-btn:hover { color: var(--ink); border-color: var(--line-strong); }
.icon-btn svg { width: 18px; height: 18px; }
.theme-toggle .i-sun { display: none; }
:root[data-theme="light"] .theme-toggle .i-sun { display: block; }
:root[data-theme="light"] .theme-toggle .i-moon { display: none; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .theme-toggle .i-sun { display: block; }
  :root:not([data-theme="dark"]) .theme-toggle .i-moon { display: none; }
}
.nav-menu { position: relative; display: none; }
.nav-menu summary { list-style: none; }
.nav-menu summary::-webkit-details-marker { display: none; }
.nav-menu .menu-panel {
  position: absolute; right: 0; top: 46px; min-width: 210px; padding: 8px; display: grid; gap: 2px;
  background: var(--surface); border: 1px solid var(--line-strong); border-radius: 12px; box-shadow: var(--shadow);
}
.nav-menu .menu-panel a { color: var(--ink); padding: 8px 10px; border-radius: 8px; font-size: 15px; }
.nav-menu .menu-panel a:hover { background: color-mix(in srgb, var(--ink) 7%, transparent); text-decoration: none; }
@media (max-width: 980px) {
  .nav-links a.opt { display: none; }
  .nav-menu { display: block; }
}
@media (max-width: 420px) {
  .brand .wordmark { font-size: 17px; }
  .nav-links a { padding: 7px 7px; }
  .nav-actions { gap: 6px; margin-left: 2px; }
}
@media (max-width: 360px) {
  .nav-inner { gap: 6px; }
  .brand { gap: 7px; }
  .brand svg { width: 26px; height: 26px; }
  .brand .wordmark { font-size: 16px; }
  .icon-btn { width: 34px; height: 34px; }
  .nav-actions { gap: 4px; margin-left: 0; }
}

/* ---------- buttons, pills ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px;
  padding: 10px 20px; border-radius: 12px; font-weight: 650; font-size: 15.5px; color: var(--ink);
  border: 1px solid var(--line-strong); background: color-mix(in srgb, var(--surface) 60%, transparent);
  transition: transform .15s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); border-color: var(--card-border-hi); }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-primary { background: var(--btn-grad); color: var(--btn-ink); border-color: transparent; box-shadow: 0 10px 30px -12px var(--glow-teal); }
.btn-primary:hover { box-shadow: 0 14px 36px -12px var(--glow-teal); border-color: transparent; }
.btn-sm { min-height: 34px; padding: 6px 12px; font-size: 13.5px; border-radius: 9px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px 5px 6px; border-radius: 999px;
  border: 1px solid var(--card-border); background: var(--card); color: var(--ink-2); font-size: 13.5px;
}
.pill:hover { text-decoration: none; border-color: var(--card-border-hi); color: var(--ink); }
.pill .tag {
  font-family: var(--mono); font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px;
  color: var(--btn-ink); background: var(--btn-grad);
}

/* ---------- sections ---------- */
.section { position: relative; padding-block: clamp(64px, 8vw, 112px); }
.section.alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.sec-head { max-width: 760px; margin-bottom: clamp(28px, 4vw, 48px); }
.sec-head.center { margin-inline: auto; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 14px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--teal);
}
.eyebrow::before { content: ""; width: 18px; height: 2px; border-radius: 2px; background: var(--btn-grad); }
.sec-head h2 { font-size: clamp(1.75rem, 1.2rem + 1.9vw, 2.6rem); font-weight: 780; letter-spacing: -0.028em; }
.sec-head p { margin-top: 14px; color: var(--ink-2); font-size: clamp(1rem, 0.96rem + 0.2vw, 1.09rem); }
.grad-text {
  background: var(--text-grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.muted { color: var(--ink-2); }
.small { font-size: 14px; }
.note { color: var(--ink-3); font-size: 13.5px; }
.note a, .muted a { color: var(--blue); }

/* backgrounds */
.bg-grid::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 80%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 80%);
}
.bg-grid > * { position: relative; z-index: 1; }

/* ---------- cards ---------- */
.card {
  position: relative; background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 24px; min-width: 0; box-shadow: var(--shadow);
  transition: border-color .2s ease, transform .2s ease, background .2s ease;
}
.card:hover { border-color: var(--card-border-hi); }
.card h3 { font-size: 18px; font-weight: 720; letter-spacing: -0.012em; margin-bottom: 8px; }
.card p { color: var(--ink-2); font-size: 15px; }
.card p + p { margin-top: 10px; }
.card .ico {
  display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; margin-bottom: 16px;
  color: var(--teal); background: color-mix(in srgb, var(--teal) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--teal) 28%, transparent);
}
.card .ico svg { width: 22px; height: 22px; }
.card .ico.blue { color: var(--blue); background: color-mix(in srgb, var(--blue) 12%, transparent); border-color: color-mix(in srgb, var(--blue) 28%, transparent); }
.card .ico.amber { color: var(--amber); background: color-mix(in srgb, var(--amber) 12%, transparent); border-color: color-mix(in srgb, var(--amber) 28%, transparent); }

.grid { display: grid; gap: 18px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.span-2 { grid-column: span 2; }
.span-all { grid-column: 1 / -1; }
@media (max-width: 960px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: minmax(0, 1fr); }
  .span-2 { grid-column: auto; }
}

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding-block: clamp(40px, 7vw, 96px) clamp(48px, 6vw, 80px); }
.hero::after { /* glow field */
  content: ""; position: absolute; inset: -20% -10% auto; height: 120%; pointer-events: none; z-index: 0;
  background:
    radial-gradient(40% 50% at 22% 28%, var(--glow-blue), transparent 70%),
    radial-gradient(34% 44% at 78% 36%, var(--glow-teal), transparent 70%),
    radial-gradient(30% 34% at 60% 92%, var(--glow-amber), transparent 72%);
  filter: blur(8px);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(28px, 4vw, 56px); align-items: center; }
@media (max-width: 1023px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } }
.hero h1 {
  margin-top: 22px; font-size: clamp(2.35rem, 1.3rem + 4vw, 4.25rem); font-weight: 820;
  letter-spacing: -0.04em; line-height: 1.02;
}
.hero h1 .line2 { display: block; }
.hero .lede { margin-top: 22px; max-width: 600px; font-size: clamp(1.03rem, 0.98rem + 0.3vw, 1.18rem); color: var(--ink-2); }
.hero .lede strong { color: var(--ink); font-weight: 650; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-visual { position: relative; width: 100%; max-width: 660px; margin-inline: auto; }
.hero-visual svg { display: block; width: 100%; height: auto; }

.stats {
  margin-top: clamp(40px, 6vw, 72px); display: grid; grid-template-columns: repeat(5, minmax(0, 1fr));
  border: 1px solid var(--card-border); border-radius: var(--radius); background: var(--card);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); overflow: hidden;
}
.stat { padding: 18px 20px; border-right: 1px solid var(--line); min-width: 0; }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-size: clamp(1.45rem, 1.1rem + 1.1vw, 2rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.1; }
.stat span { display: block; margin-top: 4px; color: var(--ink-2); font-size: 13.5px; }
.stat dd { margin: 0; }
@media (max-width: 860px) {
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stat { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n) { border-right: 0; }
  .stat:last-child { grid-column: 1 / -1; border-bottom: 0; }
}

/* hero animation (inline SVG) */
.hv-panel { fill: var(--card); stroke: var(--card-border); }
.hv-label { font: 600 12px var(--mono); fill: var(--ink-3); letter-spacing: .06em; }
.hv-cell { fill: color-mix(in srgb, var(--amber) 12%, var(--bg)); stroke: color-mix(in srgb, var(--amber) 45%, transparent); }
.hv-digit { font: 700 17px var(--mono); fill: var(--amber); text-anchor: middle; }
.hv-hex { font: 600 13px var(--mono); fill: var(--teal); text-anchor: middle; opacity: 0; }
.hv-wire { fill: none; stroke: var(--d-edge); stroke-width: 1.5; stroke-dasharray: 3 7; }
.hv-wire-flow { fill: none; stroke: url(#hvWire); stroke-width: 2; stroke-dasharray: 10 220; stroke-linecap: round; opacity: .9; }
.hv-pkt rect { fill: color-mix(in srgb, var(--teal) 16%, var(--bg)); stroke: var(--teal); stroke-width: 1.2; }
.hv-pkt text { font: 600 11.5px var(--mono); fill: var(--teal); }
.hv-pkt path { fill: none; stroke: var(--teal); stroke-width: 1.6; }
.hv-core { fill: var(--surface); stroke: var(--card-border-hi); stroke-width: 1.5; }
.hv-ring { fill: none; stroke: var(--line-strong); stroke-dasharray: 2 6; }
.hv-halo { fill: url(#hvHalo); opacity: .35; }
.hv-key rect { fill: color-mix(in srgb, var(--blue) 16%, var(--bg)); stroke: var(--blue); }
.hv-key text { font: 700 12px var(--mono); fill: var(--blue); }
.hv-out { fill: color-mix(in srgb, var(--teal) 8%, var(--surface)); stroke: color-mix(in srgb, var(--teal) 50%, transparent); }
.hv-out-label { font: 600 12px var(--mono); fill: var(--ink-3); }
.hv-num { font: 800 46px var(--font); fill: var(--ink); text-anchor: middle; letter-spacing: -0.03em; }
.hv-q { font: 700 40px var(--mono); fill: var(--ink-3); text-anchor: middle; }
.hv-cap { font: 500 12.5px var(--font); fill: var(--ink-2); text-anchor: middle; }
.hv-sub { font: 500 11.5px var(--mono); fill: var(--ink-3); text-anchor: middle; }

.hv-anim .hv-digit { animation: hv-digit 9s ease-in-out infinite; }
.hv-anim .hv-hex { animation: hv-hex 9s ease-in-out infinite; }
.hv-anim .hv-cell { animation: hv-cell 9s ease-in-out infinite; }
.hv-anim .hv-pkt { animation: hv-pkt 9s cubic-bezier(.55,.05,.35,1) infinite; transform-box: fill-box; transform-origin: center; }
.hv-anim .hv-halo { animation: hv-halo 9s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
.hv-anim .hv-num { animation: hv-num 9s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
.hv-anim .hv-q { animation: hv-q 9s ease-in-out infinite; }
.hv-anim .hv-wire-flow { animation: hv-flow 2.4s linear infinite; }
.hv-anim .hv-key { animation: hv-key 9s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
@keyframes hv-digit { 0%, 16% { opacity: 1; } 22%, 92% { opacity: 0; } 98%, 100% { opacity: 1; } }
@keyframes hv-cell {
  0%, 16% { fill: color-mix(in srgb, var(--amber) 12%, var(--bg)); stroke: color-mix(in srgb, var(--amber) 45%, transparent); }
  22%, 90% { fill: color-mix(in srgb, var(--teal) 12%, var(--bg)); stroke: color-mix(in srgb, var(--teal) 45%, transparent); }
  96%, 100% { fill: color-mix(in srgb, var(--amber) 12%, var(--bg)); stroke: color-mix(in srgb, var(--amber) 45%, transparent); }
}
@keyframes hv-hex { 0%, 16% { opacity: 0; } 22%, 90% { opacity: 1; } 96%, 100% { opacity: 0; } }
@keyframes hv-pkt {
  0%, 26% { opacity: 0; transform: translate(0, 0) scale(.9); }
  31% { opacity: 1; transform: translate(0, 0) scale(1); }
  52% { opacity: 1; transform: translate(var(--dx), var(--dy)) scale(.85); }
  56%, 100% { opacity: 0; transform: translate(var(--dx), var(--dy)) scale(.5); }
}
@keyframes hv-halo { 0%, 52% { opacity: .25; transform: scale(.9); } 60% { opacity: 1; transform: scale(1.08); } 80% { opacity: .55; transform: scale(1); } 100% { opacity: .25; transform: scale(.9); } }
@keyframes hv-key { 0%, 50% { transform: none; } 55% { transform: rotate(-8deg) scale(1.08); } 60%, 100% { transform: none; } }
@keyframes hv-num { 0%, 58% { opacity: 0; transform: scale(.7); } 64% { opacity: 1; transform: scale(1.06); } 68%, 90% { opacity: 1; transform: scale(1); } 96%, 100% { opacity: 0; transform: scale(.9); } }
@keyframes hv-q { 0%, 56% { opacity: 1; } 60%, 94% { opacity: 0; } 100% { opacity: 1; } }
@keyframes hv-flow { to { stroke-dashoffset: -230; } }

/* paused until in view (only when the script runs) */
.js .anim-gate:not(.in-view) *, .js .anim-gate:not(.in-view)::before, .js .anim-gate:not(.in-view)::after { animation-play-state: paused !important; }

/* ---------- positioning ---------- */
.lanes { display: grid; gap: 10px; }
.lane-head, .lane { display: grid; grid-template-columns: 210px repeat(3, minmax(0, 1fr)); gap: 0 26px; align-items: stretch; }
.lane-head { padding: 0 18px 4px; font: 600 12px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.lane-head span:first-child { visibility: hidden; }
.lane {
  position: relative; padding: 14px 18px; border-radius: 14px; border: 1px solid var(--card-border); background: var(--card);
}
.lane.is-fe { border-color: color-mix(in srgb, var(--teal) 55%, transparent); background: color-mix(in srgb, var(--teal) 7%, var(--card)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--teal) 20%, transparent), 0 20px 50px -30px var(--glow-teal); }
.lane-name { display: flex; flex-direction: column; justify-content: center; font-weight: 720; font-size: 15.5px; }
.lane-name small { font-weight: 500; font-size: 12.5px; color: var(--ink-3); font-family: var(--mono); }
.stop { position: relative; display: flex; gap: 10px; align-items: center; min-width: 0; font-size: 13.5px; color: var(--ink-2); line-height: 1.35; }
.stop + .stop::before { /* the flow between two stops */
  content: ""; position: absolute; left: -24px; top: 50%; width: 20px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--line-strong));
}
.stop .where { display: none; font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); letter-spacing: .04em; }
.chip {
  flex: none; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; border: 1px solid;
}
.chip svg { width: 18px; height: 18px; }
.chip.clear { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 45%, transparent); background: color-mix(in srgb, var(--amber) 12%, transparent); }
.chip.enc { color: var(--teal); border-color: color-mix(in srgb, var(--teal) 45%, transparent); background: color-mix(in srgb, var(--teal) 12%, transparent); }
.chip.shares { color: var(--blue); border-color: color-mix(in srgb, var(--blue) 45%, transparent); background: color-mix(in srgb, var(--blue) 12%, transparent); }
.chip.noisy { color: var(--slate); border-color: color-mix(in srgb, var(--slate) 45%, transparent); background: color-mix(in srgb, var(--slate) 12%, transparent); }
.chip.hw { color: var(--blue); border-color: color-mix(in srgb, var(--blue) 45%, transparent); background: color-mix(in srgb, var(--blue) 8%, transparent); border-style: dashed; }
.lane-legend { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 14px; font-size: 13px; color: var(--ink-3); }
.lane-legend span { display: inline-flex; align-items: center; gap: 7px; }
.lane-legend .chip { width: 22px; height: 22px; border-radius: 6px; }
.lane-legend .chip svg { width: 13px; height: 13px; }
@media (max-width: 900px) {
  .lane-head { display: none; }
  .lane { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .stop + .stop::before { display: none; }
  .stop .where { display: inline; }
}

.compare-wrap { margin-top: 28px; border: 1px solid var(--card-border); border-radius: var(--radius); background: var(--card); overflow: hidden; }
table.compare { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare th, .compare td { padding: 13px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.compare thead th { font: 600 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); background: color-mix(in srgb, var(--ink) 3%, transparent); }
.compare tbody th { font-weight: 720; white-space: nowrap; }
.compare td { color: var(--ink-2); }
.compare tr:last-child > * { border-bottom: 0; }
.compare tr.is-fe > * { background: color-mix(in srgb, var(--teal) 7%, transparent); }
.compare tr.is-fe th { color: var(--teal); }
@media (max-width: 900px) {
  table.compare, .compare tbody, .compare tr, .compare th, .compare td { display: block; }
  .compare thead { display: none; }
  .compare tr { padding: 14px 16px; border-bottom: 1px solid var(--line); }
  .compare tr:last-child { border-bottom: 0; }
  .compare tbody th { padding: 0 0 8px; border: 0; font-size: 16px; }
  .compare td { padding: 6px 0; border: 0; display: grid; grid-template-columns: 9.5em minmax(0, 1fr); gap: 10px; }
  .compare tr.is-fe { background: color-mix(in srgb, var(--teal) 7%, transparent); }
  .compare tr.is-fe > * { background: transparent; }
  .compare td::before { content: attr(data-label); font: 600 11.5px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); padding-top: 2px; }
}
@media (max-width: 420px) { .compare td { grid-template-columns: minmax(0, 1fr); gap: 2px; } }

.limits {
  margin-top: 22px; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 14px; padding: 18px 20px;
  border-radius: var(--radius); border: 1px solid color-mix(in srgb, var(--amber) 38%, transparent);
  background: color-mix(in srgb, var(--amber) 6%, var(--card));
}
.limits > svg { width: 22px; height: 22px; color: var(--amber); margin-top: 2px; }
.limits h3 { font-size: 16px; margin-bottom: 8px; }
.limits ul { display: grid; gap: 6px; padding-left: 18px; color: var(--ink-2); font-size: 14.5px; }

/* ---------- diagram players ---------- */
.player { border: 1px solid var(--card-border); border-radius: calc(var(--radius) + 4px); background: var(--card); overflow: hidden; box-shadow: var(--shadow); }
.player-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.tab {
  font: inherit; font-size: 14px; font-weight: 600; color: var(--ink-2); cursor: pointer;
  padding: 7px 13px; border-radius: 9px; border: 1px solid var(--line); background: transparent;
}
.tab:hover { color: var(--ink); border-color: var(--line-strong); }
.tab[aria-selected="true"], .tab[aria-pressed="true"] { color: var(--btn-ink); background: var(--btn-grad); border-color: transparent; }
.ctls { display: flex; gap: 6px; }
.ctl {
  display: inline-grid; place-items: center; min-width: 38px; height: 36px; padding: 0 10px; border-radius: 9px; cursor: pointer;
  font: 600 13.5px var(--font); color: var(--ink-2); background: transparent; border: 1px solid var(--line);
}
.ctl:hover { color: var(--ink); border-color: var(--line-strong); }
.ctl svg { width: 16px; height: 16px; }
.stage { display: grid; grid-template-columns: minmax(0, 1fr) 320px; }
.stage-svg { padding: 14px; overflow-x: auto; min-width: 0; border-right: 1px solid var(--line); }
.stage-svg svg { display: block; width: 100%; height: auto; min-width: 540px; }
.steps { padding: 16px 16px 18px; display: grid; align-content: start; gap: 4px; counter-reset: step; min-width: 0; }
.steps[hidden] { display: none; }
.steps li {
  list-style: none; position: relative; padding: 9px 10px 9px 40px; border-radius: 10px; font-size: 14px; color: var(--ink-2);
  border: 1px solid transparent; cursor: default; transition: background .2s, border-color .2s, color .2s;
}
.steps li::before {
  counter-increment: step; content: counter(step); position: absolute; left: 10px; top: 9px;
  display: grid; place-items: center; width: 20px; height: 20px; border-radius: 6px;
  font: 700 11.5px var(--mono); color: var(--ink-3); border: 1px solid var(--line-strong);
}
.js .steps li { cursor: pointer; }
.steps code { overflow-wrap: break-word; }
.steps li.is-on { color: var(--ink); background: color-mix(in srgb, var(--teal) 9%, transparent); border-color: color-mix(in srgb, var(--teal) 32%, transparent); }
.steps li.is-on::before { color: var(--btn-ink); background: var(--btn-grad); border-color: transparent; }
/* without the script: no controls, every step list with its name */
html:not(.js) .player-bar { display: none; }
html:not(.js) .steps::before { content: attr(aria-label); display: block; margin-bottom: 4px; font: 600 12px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.player-foot { padding: 12px 16px; border-top: 1px solid var(--line); font-size: 13.5px; color: var(--ink-3); }
@media (max-width: 900px) {
  .stage { grid-template-columns: minmax(0, 1fr); }
  .stage-svg { border-right: 0; border-bottom: 1px solid var(--line); }
}

/* svg diagram vocabulary */
.dg text { font-family: var(--font); fill: var(--ink); }
.dg .t-title { font-size: 15px; font-weight: 700; }
.dg .t-sub { font-size: 12px; fill: var(--ink-3); font-family: var(--mono); }
.dg .t-lane { font-size: 11.5px; fill: var(--ink-3); font-family: var(--mono); letter-spacing: .06em; }
.dg .box { fill: var(--d-node); stroke: var(--d-stroke); stroke-width: 1.3; transition: fill .35s, stroke .35s, stroke-width .35s; }
.dg .node.is-on .box { fill: var(--d-node-on); stroke: var(--teal); stroke-width: 2; }
.dg .node.res .box { fill: var(--d-res); stroke: color-mix(in srgb, var(--teal) 55%, transparent); }
.dg .node.res.is-on .box { stroke: var(--teal); stroke-width: 2.4; }
.dg .node.dim { opacity: .55; }
.dg .node.ghost .box { stroke-dasharray: 5 4; }
.dg .edge { fill: none; stroke: var(--d-edge); stroke-width: 1.5; stroke-dasharray: 3 6; transition: stroke .3s, stroke-width .3s; }
.dg .edge.is-on { stroke: var(--teal); stroke-width: 2; stroke-dasharray: 8 6; animation: dg-dash 1s linear infinite; }
.dg .off { display: none; }
.dg .pkt { fill: var(--d-pkt); }
.dg .pkt-halo { fill: var(--d-pkt); opacity: .22; }
.dg .pkt-label { font: 700 12px var(--mono); fill: var(--ink); paint-order: stroke; stroke: var(--surface); stroke-width: 4px; stroke-linejoin: round; }
@keyframes dg-dash { to { stroke-dashoffset: -28; } }

/* ---------- code ---------- */
.code { border-radius: 14px; border: 1px solid rgba(130, 158, 205, 0.2); background: var(--code-bg); overflow: hidden; min-width: 0; box-shadow: var(--shadow); }
.code-head { display: flex; align-items: center; gap: 10px; padding: 8px 10px 8px 14px; background: var(--code-head); border-bottom: 1px solid rgba(130, 158, 205, 0.16); }
.code-head .dots { display: flex; gap: 6px; }
.code-head .dots i { width: 10px; height: 10px; border-radius: 50%; background: #2a3550; }
.code-head .fname { font: 500 12.5px var(--mono); color: #93a3bd; }
.copy {
  margin-left: auto; display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 8px; cursor: pointer;
  font: 600 12.5px var(--font); color: #c3cfe2; background: transparent; border: 1px solid rgba(150, 175, 220, 0.25);
}
.copy:hover { color: #fff; border-color: rgba(150, 175, 220, 0.5); }
.copy svg { width: 14px; height: 14px; }
.code pre { margin: 0; padding: 18px 20px; overflow-x: auto; font-size: 13.5px; line-height: 1.7; color: #dbe5f3; tab-size: 4; }
.code .cm { color: #8597b3; }
.code .kw { color: #94bdff; }
.code .st { color: #ffc874; }
.code .fn { color: #62e3d3; }
.code .nu { color: #ffc874; }

/* ---------- misc blocks ---------- */
.notice {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 12px; padding: 14px 18px; border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--amber) 40%, transparent); background: color-mix(in srgb, var(--amber) 7%, var(--card));
  font-size: 14.5px; color: var(--ink-2);
}
.notice svg { width: 20px; height: 20px; color: var(--amber); margin-top: 1px; }
.notice strong { color: var(--ink); }
.placeholder {
  border: 1px dashed var(--line-strong); border-radius: var(--radius); padding: 28px; color: var(--ink-3); font-size: 14.5px;
  background: color-mix(in srgb, var(--ink) 2%, transparent);
}
.links-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--line); padding-block: 40px 48px; color: var(--ink-3); font-size: 14px; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
.flinks { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.flinks a { color: var(--ink-2); font-weight: 550; }
.flinks a:hover { color: var(--ink); }
.footer-meta { margin-top: 18px; display: grid; gap: 4px; }
.footer-meta .tagline { color: var(--ink-2); font-weight: 600; }

/* ---------- sub heads, small grids ---------- */
.sub-head { margin-top: clamp(56px, 7vw, 88px); }
.h3-lg { font-size: clamp(1.35rem, 1.1rem + 0.9vw, 1.75rem); font-weight: 760; letter-spacing: -0.022em; }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1060px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid-4 { grid-template-columns: minmax(0, 1fr); } }

/* architecture diagram extras */
.dg .t-tag { font-size: 11.5px; fill: var(--ink-3); font-family: var(--mono); }
.dg .t-strong { fill: var(--ink-2); font-weight: 700; }
.dg .tick { fill: none; stroke: var(--d-edge); stroke-width: 1.2; }
.dg .inner { fill: color-mix(in srgb, var(--amber) 7%, transparent); stroke: color-mix(in srgb, var(--amber) 35%, transparent); stroke-dasharray: 4 4; }
.dg .node.rust .t-title { fill: var(--amber); }
.dg .node.py .t-title { fill: var(--blue); }
.dg .node.rust.is-on .box { stroke: var(--amber); fill: color-mix(in srgb, var(--amber) 9%, var(--d-node)); }
.dg .node.py.is-on .box { stroke: var(--blue); fill: color-mix(in srgb, var(--blue) 10%, var(--d-node)); }
.dg .edge.up.is-on { stroke: var(--teal); }
.dg .edge.is-on:not(.up) { stroke: var(--amber); }
.dg-arch .edge.is-on:not(.up) { stroke: var(--amber); }
#p-fl .dg .edge.is-on:not(.up) { stroke: var(--teal); }
.dg .pkt.up { fill: var(--teal); }
.dg .pkt-halo.up { fill: var(--teal); }
.stage-svg .dg-arch { max-width: 620px; margin-inline: auto; }
@media (max-width: 560px) { .stage-svg .dg-arch { min-width: 470px; } }

.rules { margin-top: 18px; }
.rule { padding: 18px 18px 16px; border-radius: 14px; border: 1px solid var(--card-border); background: var(--card); border-top: 2px solid var(--amber); }
.rule b { display: block; font-size: 15px; margin-bottom: 6px; }
.rule p { font-size: 14px; color: var(--ink-2); }

/* ---------- families ---------- */
.fam-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.fam-top h3 { font-size: 22px; margin: 0; letter-spacing: -0.02em; }
.fam-n { font: 800 30px var(--font); letter-spacing: -0.03em; background: var(--text-grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.fam-kind { font: 600 12px var(--mono) !important; letter-spacing: .08em; text-transform: uppercase; color: var(--teal) !important; margin: 2px 0 10px; }
.cap-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px 10px; margin: 18px 0 28px; }
.cap-chips li { font-size: 13.5px; color: var(--ink-2); padding: 6px 12px; border-radius: 999px; border: 1px solid var(--card-border); background: var(--card); }
.cap-chips b { color: var(--ink); margin-right: 4px; }

.matrix-card { border: 1px solid var(--card-border); border-radius: calc(var(--radius) + 4px); background: var(--card); box-shadow: var(--shadow); overflow: hidden; }
.matrix-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 20px; padding: 16px 18px; border-bottom: 1px solid var(--line); }
.matrix-head h3 { font-size: 16px; }
.status-legend { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--ink-2); }
.status-legend li { display: inline-flex; align-items: center; gap: 7px; }
.matrix-scroll { overflow-x: auto; }
table.matrix { width: 100%; min-width: 720px; border-collapse: collapse; font-size: 14px; }
.matrix th, .matrix td { padding: 6px 8px; text-align: center; border-bottom: 1px solid var(--line); }
.matrix thead th { font: 600 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); padding-block: 12px; }
.matrix thead th:first-child, .matrix tbody th { text-align: left; padding-left: 18px; }
.matrix tbody th { font-weight: 720; white-space: nowrap; }
.matrix tbody th small { display: block; font-weight: 500; font-size: 12px; color: var(--ink-3); }
.matrix tbody tr:last-child > * { border-bottom: 0; }
.matrix td.none { color: var(--ink-3); }
.cell {
  width: 100%; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 6px 8px; border-radius: 10px; border: 1px solid transparent; background: transparent; color: var(--ink-2);
  font: 600 12.5px var(--mono); cursor: pointer;
}
.cell:hover { background: color-mix(in srgb, var(--ink) 6%, transparent); border-color: var(--line-strong); }
.cell[aria-pressed="true"] { background: color-mix(in srgb, var(--teal) 10%, transparent); border-color: color-mix(in srgb, var(--teal) 50%, transparent); color: var(--ink); }
.cell .dots { display: inline-flex; gap: 4px; }
.dot { display: inline-block; width: 11px; height: 11px; border-radius: 50%; flex: none; }
.dot.rev { background: var(--teal); }
.dot.exp { background: var(--amber); border-radius: 2px; transform: rotate(45deg) scale(.86); }
.dot.unr { background: transparent; box-shadow: inset 0 0 0 2px var(--slate); }
.dot.ins { background: transparent; position: relative; border-radius: 0; }
.dot.ins::before, .dot.ins::after { content: ""; position: absolute; left: 5px; top: -1px; width: 2px; height: 13px; background: var(--red); transform: rotate(45deg); }
.dot.ins::after { transform: rotate(-45deg); }
.cell-detail { padding: 14px 18px 16px; border-top: 1px solid var(--line); min-height: 64px; font-size: 14px; color: var(--ink-2); }
.cell-detail h4 { font-size: 14px; margin-bottom: 8px; color: var(--ink); }
.cell-detail ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.cell-detail li { display: inline-flex; align-items: center; gap: 8px; padding: 5px 10px; border-radius: 9px; border: 1px solid var(--line); background: color-mix(in srgb, var(--ink) 3%, transparent); }
.cell-detail li code { background: none; padding: 0; font-size: 13px; color: var(--ink); }
.badge { font: 600 11.5px var(--mono); padding: 1px 7px; border-radius: 999px; border: 1px solid; }
.badge.rev { color: var(--teal); border-color: color-mix(in srgb, var(--teal) 45%, transparent); }
.badge.exp { color: var(--amber); border-color: color-mix(in srgb, var(--amber) 45%, transparent); }
.badge.unr { color: var(--slate); border-color: color-mix(in srgb, var(--slate) 45%, transparent); }
.badge.ref { color: var(--red); border-color: color-mix(in srgb, var(--red) 45%, transparent); }

/* ---------- use cases ---------- */
.uc { display: flex; flex-direction: column; }
.uc-links { margin-top: auto !important; padding-top: 14px; display: flex; flex-direction: column; gap: 4px; font-size: 13.5px; }
.uc-links a { font-family: var(--mono); overflow-wrap: anywhere; }

/* ---------- performance ---------- */
.kpi { padding: 20px; border-radius: var(--radius); border: 1px solid var(--card-border); background: var(--card); min-width: 0; }
.kpi b { display: block; font-size: clamp(1.9rem, 1.5rem + 1.2vw, 2.5rem); font-weight: 820; letter-spacing: -0.035em; line-height: 1.05; }
.kpi span { display: block; margin-top: 6px; font-weight: 650; color: var(--ink); }
.kpi small { display: block; margin-top: 4px; font-size: 13px; color: var(--ink-3); }
.perf-legend { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 34px 0 14px; font-size: 13.5px; color: var(--ink-2); }
.perf-legend span { display: inline-flex; align-items: center; gap: 8px; }
.sw { display: inline-block; width: 22px; height: 8px; border-radius: 4px; }
.sw.before, .b.before::before { background: color-mix(in srgb, var(--slate) 55%, transparent); }
.sw.after, .b.after::before { background: var(--btn-grad); }
.pg { margin: 0; }
.pg figcaption { font-size: 15px; margin-bottom: 14px; color: var(--ink); }
.pg figcaption small { display: block; margin-top: 3px; font-size: 12.5px; color: var(--ink-3); }
.bars { display: grid; gap: 12px; }
.bar-row { display: grid; grid-template-columns: minmax(0, 1fr); gap: 3px; }
.bl { font-size: 13px; color: var(--ink-2); }
.b { position: relative; display: flex; align-items: center; gap: 8px; height: 14px; }
.b::before { content: ""; height: 8px; border-radius: 0 4px 4px 0; width: max(3px, calc(var(--w) * 0.8)); flex: none; transition: width 1s cubic-bezier(.2,.7,.2,1); }
.b em { font: 600 12px var(--mono); font-style: normal; color: var(--ink-2); white-space: nowrap; }
.b.after em { color: var(--ink); }
.js .perf-groups:not(.was-seen) .b::before { width: 3px; }
.abs-list { display: grid; gap: 14px; margin: 0; }
.abs-list dt { font-size: 13px; color: var(--ink-2); }
.abs-list dd { margin: 4px 0 0; font: 500 13px var(--mono); color: var(--ink-2); }
.abs-list dd b { color: var(--ink); font-weight: 700; }
.perf-table { margin-top: 18px; }
.perf-table summary { cursor: pointer; color: var(--blue); font-weight: 600; font-size: 14.5px; }
.table-scroll { overflow-x: auto; margin-top: 12px; border: 1px solid var(--card-border); border-radius: 12px; background: var(--card); }
table.data { width: 100%; min-width: 620px; border-collapse: collapse; font-size: 13.5px; }
.data th, .data td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.data thead th { font: 600 12px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.data td { color: var(--ink-2); font-variant-numeric: tabular-nums; }
.data tbody th { font-weight: 650; }

/* ---------- quickstart ---------- */
.qs { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr); gap: 18px; align-items: start; }
@media (max-width: 960px) { .qs { grid-template-columns: minmax(0, 1fr); } }
.ctabs { display: flex; gap: 4px; overflow-x: auto; min-width: 0; scrollbar-width: none; }
.ctabs [role="tab"] {
  flex: none; font: 600 12.5px var(--font); color: #a9b7cc; background: transparent; border: 1px solid transparent;
  padding: 5px 10px; border-radius: 8px; cursor: pointer;
}
.ctabs [role="tab"]:hover { color: #fff; }
.ctabs [role="tab"][aria-selected="true"] { color: #fff; background: rgba(150, 175, 220, 0.14); border-color: rgba(150, 175, 220, 0.28); }
.code-tabs .code-head { flex-wrap: nowrap; }
.code-tabs .code-head .dots { display: none; }
@media (min-width: 640px) { .code-tabs .code-head .dots { display: flex; } }
.cpanel-title { padding: 10px 20px 0; font: 500 12.5px var(--mono); color: #93a3bd; }
.js .code-tabs .cpanel-title { display: none; }
.no-js-only { display: none; }
html:not(.js) .ctabs { display: none; }
html:not(.js) .cpanel + .cpanel { border-top: 1px solid rgba(130, 158, 205, 0.16); }

/* ---------- security ---------- */
.sec-cards { margin-top: 0; }
.status-bar { display: flex; gap: 2px; height: 12px; margin: 6px 0 16px; border-radius: 6px; overflow: hidden; }
.status-bar .seg { flex: var(--n) 1 0; }
.status-bar .seg.rev { background: var(--teal); }
.status-bar .seg.exp { background: var(--amber); }
.status-bar .seg.unr { background: color-mix(in srgb, var(--slate) 60%, transparent); }
.status-list { display: grid; gap: 10px; margin: 0; }
.status-list div { display: grid; grid-template-columns: 9.2em minmax(0, 1fr); gap: 10px; font-size: 14px; }
.status-list dt { display: flex; align-items: center; align-self: start; gap: 8px; color: var(--ink); font-weight: 600; }
.status-list dd { margin: 0; color: var(--ink-2); }
.status-list dd b { color: var(--ink); margin-right: 4px; }
@media (max-width: 400px) { .status-list div { grid-template-columns: minmax(0, 1fr); gap: 2px; } }
.profile { padding: 10px 0; border-bottom: 1px solid var(--line); }
.profile:first-of-type { padding-top: 2px; }
.profile p { font-size: 14px; }
.pf-name { color: var(--ink) !important; font-weight: 650; margin-bottom: 4px; }
.pf-tag { font: 600 11px var(--mono); padding: 1px 7px; border-radius: 999px; color: var(--ink-3); border: 1px solid var(--line-strong); margin-left: 6px; }
.refused { margin-top: 12px; font-size: 13.5px !important; }
.refused code { display: inline-block; margin: 4px 4px 0 0; }
.ticks { list-style: none; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 22px; font-size: 14.5px; color: var(--ink-2); }
.ticks li::before { content: ""; position: absolute; left: 2px; top: 8px; width: 8px; height: 8px; border-radius: 2px; background: var(--btn-grad); transform: rotate(45deg); }

/* ---------- citation ---------- */
.cite-code { max-width: 820px; }
.soon { display: inline-block; margin-left: 8px; padding: 2px 9px; border-radius: 999px; font: 600 11.5px var(--mono); color: var(--amber); border: 1px solid color-mix(in srgb, var(--amber) 45%, transparent); vertical-align: 1px; }

/* ---------- reveal on scroll (only with the script) ---------- */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
  .btn:hover { transform: none; }
  /* hero: the static picture shows every stage at once */
  .hv-digit { opacity: 1; }
  .hv-hex { opacity: 0; }
  .hv-pkt { opacity: 1; transform: translate(calc(var(--dx) * 0.55), calc(var(--dy) * 0.55)); }
  .hv-num { opacity: 1; }
  .hv-q { opacity: 0; }
  .hv-halo { opacity: .7; }
  .hv-wire-flow { display: none; }
  .dg .edge.is-on { stroke-dasharray: none; }
}
@media print {
  .nav, .hero::after, body::before { display: none; }
  .js .reveal { opacity: 1; transform: none; }
}