/* ==========================================================================
   Salla Developers — v4: "The Get-Started Guide"
   Premium pass, built entirely on the Salla Design System tokens
   (assets/colors_and_type.css): petrol + mint, PingARLT, DS radii / shadows /
   tints / type scale. Alternating grounds, real elevation, tasteful
   micro-motion. No sound. Honours prefers-reduced-motion.
   ========================================================================== */

/* ---- semantic locals, every value resolved from a Salla DS token --------- */
:root {
  --canvas:    hsl(var(--gray-200));       /* page ground (#F7F7F7 / dark) */
  --surface:   hsl(var(--white-100));      /* raised card (white / dark)   */
  --surface-2: hsl(var(--gray-100));       /* faint raised                 */
  --tint:      hsl(var(--primary-100));    /* petrol tint panel (#F1F8F9)  */
  --tint-mint: hsl(var(--secondary-400) / .16);

  --fg:   hsl(var(--dark));                /* headings / strong */
  --fg-2: hsl(var(--dark-300));            /* body */
  --fg-3: hsl(var(--dark-100));            /* muted */
  --line:   hsl(var(--gray-400));
  --line-2: hsl(var(--gray-500));

  --brand:     hsl(var(--primary));        /* petrol (mint-tinted in dark) */
  --brand-fix: hsl(var(--primary-force));  /* petrol, stays petrol in dark */
  --accent:    hsl(var(--secondary-400));  /* mint — primary buttons */
  --accent-hi: hsl(var(--secondary-600));
  --link:      hsl(var(--primary-400));
  --ok:   hsl(var(--success-600));
  --warn: hsl(var(--warning-600));

  --code-bg: #08313b;                      /* code cards: dark in both themes */
  --code-fg: hsl(0 0% 88%);

  --radius:    var(--rounded-lg);          /* .5rem  — controls */
  --radius-xl: var(--rounded-xl);          /* .75rem — cards */
  --radius-2xl: var(--rounded-2xl);        /* 1rem   — big panels */
  --sh-1: var(--shadow-xs);
  --sh-2: var(--shadow-sm);
  --sh-3: var(--shadow-md);
  --sh-4: var(--shadow-lg);
  --sh-focus: var(--s-shadow-focus);

  --mono: var(--s-font-mono);
  --ease: cubic-bezier(.4, 0, .2, 1);
  --dur: 220ms;

  --max: 1060px;
  --readable: 46rem;
  --pad: clamp(1.15rem, 4vw, 2rem);
}
.dark {
  --code-bg: #061f26;
}

* { box-sizing: border-box; }
[class*="hgi-"], [class*="hgi-"]::before, [class*="hgi-"]::after { letter-spacing: normal !important; }
[hidden] { display: none !important; }

/* DS base already sets PingARLT + 14px root + heading scale + link colour;
   we elevate what a premium landing needs. */
html { scroll-behavior: smooth; scroll-padding-top: 5.25rem; }
body { background: var(--canvas); color: var(--fg-2); line-height: 1.62; -webkit-font-smoothing: antialiased; }
h1, h2, h3 { color: var(--fg); letter-spacing: -.021em; }
code { background: none !important; padding: 0 !important; border-radius: 0 !important; color: inherit; font-size: .92em; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
ol, ul { margin: 0; padding: 0; }
svg { display: block; }
::selection { background: hsl(var(--secondary-400) / .55); }
.skip { position: absolute; left: 1rem; top: -3rem; background: var(--accent); color: var(--brand-fix); padding: .5rem .9rem; border-radius: var(--radius); font-weight: 700; transition: top .2s; z-index: 100; }
.skip:focus { top: 1rem; }
:focus-visible { outline: 2px solid var(--accent-hi); outline-offset: 3px; border-radius: 2px; }

main { max-width: var(--max); margin: 0 auto; padding-inline: var(--pad); }
section { padding-block: clamp(3rem, 7vw, 5.5rem); }
section > h2.kicker + p { margin-top: -.75rem; }
.kicker {
  display: inline-flex; align-items: center; gap: .55rem;
  font: 700 .72rem/1 var(--mono); letter-spacing: .15em; text-transform: uppercase;
  color: var(--brand); margin: 0 0 1.5rem;
}
.kicker::before { content: ""; width: 1.4rem; height: 1px; background: currentColor; opacity: .5; }
.dark .kicker { color: hsl(var(--secondary-400)); }
.kicker--light { color: hsl(var(--secondary-400)); }

/* section intros */
.concepts__lead, .ship__lead, .qs__intro, .life__lead, .idx__lead {
  max-width: var(--readable); color: var(--fg-2); font-size: 1.02rem; margin-bottom: 1.9rem;
}

/* ---- top bar ---- */
.bar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  height: 4rem; padding-inline: var(--pad);
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  backdrop-filter: saturate(1.6) blur(12px); -webkit-backdrop-filter: saturate(1.6) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}
.bar.is-scrolled { border-color: var(--line); box-shadow: 0 1px 0 hsl(var(--dark) / .03), var(--sh-2); }
.brand { display: inline-flex; align-items: center; gap: .55rem; color: var(--fg); font-weight: 500; }
.brand:hover { text-decoration: none; }
.brand b { font-weight: 800; }
.brand svg { color: var(--brand); transition: transform var(--dur) var(--ease); }
.brand:hover svg { transform: rotate(-8deg) scale(1.06); }
.bar__nav { display: flex; align-items: center; gap: 1.35rem; }
.bar__nav > a { position: relative; color: var(--fg-2); font-weight: 600; font-size: .875rem; }
.bar__nav > a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -.35rem; height: 2px; background: var(--accent); border-radius: 2px; transition: right var(--dur) var(--ease); }
.bar__nav > a:hover { color: var(--fg); text-decoration: none; }
.bar__nav > a:hover::after { right: 0; }
.tmode { display: inline-grid; place-items: center; width: 2rem; height: 2rem; border: 1px solid var(--line-2); border-radius: var(--radius); background: var(--surface); color: var(--fg); cursor: pointer; font-size: 1rem; transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease); }
.tmode:hover { border-color: var(--brand); }
.tmode:active { transform: scale(.94); }
.tmode__m { display: none; } .dark .tmode__s { display: none; } .dark .tmode__m { display: inline; }
.cta {
  display: inline-flex; align-items: center; height: var(--md-height);
  padding-inline: 1.1rem; border-radius: var(--radius);
  background: var(--accent); color: var(--brand-fix); font-weight: 700; font-size: .875rem;
  box-shadow: 0 1px 2px hsl(var(--primary-force) / .18), inset 0 1px 0 hsl(0 0% 100% / .35);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}
.cta:hover { text-decoration: none; background: var(--accent-hi); transform: translateY(-1px); box-shadow: var(--sh-3), inset 0 1px 0 hsl(0 0% 100% / .35); }
.cta:active { transform: translateY(0) scale(.98); }
.cta--lg { height: var(--lg-height); padding-inline: 1.5rem; font-size: 1rem; }

/* ---- 1 · hero ---- */
.launch {
  display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  padding-top: clamp(2.5rem, 6vw, 4.25rem); padding-bottom: clamp(2.5rem, 6vw, 4rem);
  position: relative;
}
.launch__art { flex-direction: column; }
.launch__art-note { margin-top: 1rem; max-width: 24rem; font-size: .82rem; line-height: 1.5; color: var(--fg-3); }
.launch::before {
  content: ""; position: absolute; inset: -20% -30% auto -30%; height: 70%;
  background: radial-gradient(60% 100% at 30% 0%, hsl(var(--secondary-400) / .22), transparent 70%),
              radial-gradient(50% 100% at 85% 10%, hsl(var(--primary) / .10), transparent 70%);
  z-index: -1; pointer-events: none;
}
.dark .launch::before { background: radial-gradient(60% 100% at 30% 0%, hsl(var(--secondary-600) / .12), transparent 70%); }
.launch__eyebrow { font: 700 .72rem/1 var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--fg-3); margin-bottom: 1rem; }
.launch h1 { font-size: clamp(2.15rem, 4.6vw, 3.35rem); font-weight: 800; line-height: 1.08; }
.launch__sub { margin-top: 1.05rem; font-size: 1.09rem; color: var(--fg-2); max-width: 34rem; }
.launch__quick { margin-top: 2rem; }
.launch__quick-label { display: block; font: 600 .72rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--fg-3); margin-bottom: .6rem; }
.run { display: flex; align-items: center; gap: .5rem; max-width: 33rem; background: var(--code-bg); border: 1px solid hsl(191 55% 26%); border-radius: var(--radius); padding: .72rem .9rem; box-shadow: var(--sh-3), inset 0 1px 0 hsl(0 0% 100% / .05); }
.run code { font-family: var(--mono); font-size: .9rem; color: var(--code-fg); flex: 1; overflow-x: auto; }
.run code::before { content: "$ "; color: hsl(164 60% 58%); }
.run .hl { color: hsl(164 74% 70%); }
.run__copy { flex: none; display: inline-grid; place-items: center; width: 1.95rem; height: 1.95rem; border: 0; border-radius: calc(var(--radius) - 2px); background: hsl(0 0% 100% / .09); color: hsl(0 0% 74%); cursor: pointer; transition: background var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease); }
.run__copy:hover { background: hsl(0 0% 100% / .18); color: #fff; }
.run__copy:active { transform: scale(.9); }
.run__copy.is-done { color: hsl(164 72% 62%); background: hsl(164 72% 62% / .16); }
.run--sm { padding: .55rem .75rem; }
.run--sm code { font-size: .84rem; }
.run__alt { margin-top: 1rem; font-size: .92rem; color: var(--fg-3); }

/* hero art — an app-identity card, pure CSS, static */
.launch__art { display: flex; justify-content: center; }
.appcard {
  width: 100%; max-width: 24rem; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius-2xl);
  box-shadow: var(--sh-4), 0 1px 0 hsl(0 0% 100% / .6) inset;
  padding: 1.35rem 1.4rem; transform: rotate(1.2deg);
  transition: transform 400ms var(--ease), box-shadow 400ms var(--ease);
}
.launch:hover .appcard { transform: rotate(0deg) translateY(-2px); box-shadow: var(--sh-4), var(--sh-3); }
.appcard__top { display: flex; align-items: center; gap: .6rem; padding-bottom: .95rem; border-bottom: 1px solid var(--line); }
.appcard__icon { display: inline-grid; place-items: center; width: 2rem; height: 2rem; border-radius: var(--radius); background: var(--tint); color: var(--brand); font-size: 1.1rem; }
.dark .appcard__icon { background: hsl(var(--primary-100)); }
.appcard__name { font-weight: 800; color: var(--fg); }
.appcard__badge { margin-left: auto; font: 600 .68rem/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--fg-3); border: 1px solid var(--line-2); border-radius: var(--rounded-full); padding: .28rem .55rem; }
.appcard__rows { display: grid; gap: .7rem; margin: .95rem 0; }
.appcard__rows > div { display: grid; grid-template-columns: 4.2rem 1fr; gap: .6rem; align-items: baseline; }
.appcard__rows dt { font: 700 .68rem/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--fg-3); }
.appcard__rows dd { margin: 0; font-size: .86rem; color: var(--fg-2); }
.appcard__rows dd span { display: inline-block; margin: 0 .3rem .3rem 0; padding: .18rem .5rem; border-radius: var(--rounded); background: var(--tint-mint); color: var(--brand); font: 600 .78rem/1 var(--mono); }
.dark .appcard__rows dd span { color: hsl(var(--secondary-400)); }
.appcard__rows dd code { color: var(--fg); }
.appcard__foot { display: flex; align-items: center; gap: .5rem; padding-top: .9rem; border-top: 1px solid var(--line); font: 600 .8rem/1 var(--mono); color: var(--fg-3); }
.appcard__dot { width: .5rem; height: .5rem; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px hsl(var(--success-600) / .2); }

/* ---- generic elevated panel ---- */
.concepts, .ship, .paths, .qs, .life, .idx, .help { border-top: 1px solid var(--line); }
.concepts { border-top: 0; }

/* ---- 2 · core concepts ---- */
.concepts__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: .9rem; }
.concepts__grid > div {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-xl);
  padding: 1.1rem 1.15rem; box-shadow: var(--sh-1);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.concepts__grid > div:hover { transform: translateY(-3px); box-shadow: var(--sh-3); border-color: var(--line-2); }
.concepts__grid b { display: block; color: var(--fg); font-size: .96rem; margin-bottom: .3rem; }
.concepts__grid span { color: var(--fg-3); font-size: .875rem; line-height: 1.55; }
.concepts__grid code { color: var(--brand); font-family: var(--mono); }
.dark .concepts__grid code { color: hsl(var(--secondary-400)); }

.cmap {
  margin-top: 1.75rem; display: flex; flex-wrap: wrap; align-items: center; gap: .85rem 1rem;
  background: var(--tint); border: 1px solid hsl(var(--primary-200) / .5); border-radius: var(--radius-2xl);
  padding: clamp(1.4rem, 3.5vw, 2.25rem) clamp(1.25rem, 3vw, 2rem) clamp(1.25rem, 3vw, 2rem);
}
.dark .cmap { background: hsl(var(--primary-100)); border-color: hsl(var(--gray-300)); }
.cmap__node {
  flex: 0 0 auto; min-width: 11rem; text-align: center;
  background: var(--surface); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: .8rem 1.1rem; font-weight: 700; color: var(--fg); font-size: .9rem; box-shadow: var(--sh-1);
}
.cmap__node small { display: block; margin-top: .15rem; font: 500 .72rem/1.3 var(--mono); color: var(--fg-3); }
.cmap__node--app { background: var(--brand-fix); color: #fff; border-color: transparent; box-shadow: var(--sh-3); }
.cmap__node--app small { color: hsl(0 0% 100% / .6); }
.cmap__arrow { flex: 0 0 auto; position: relative; width: 4.5rem; height: 2px; margin: 0 .35rem; background: hsl(var(--secondary-600)); }
.cmap__arrow::after { content: ""; position: absolute; right: -1px; top: 50%; width: .5rem; height: .5rem; border-top: 2px solid hsl(var(--secondary-600)); border-right: 2px solid hsl(var(--secondary-600)); transform: translateY(-50%) rotate(45deg); }
.cmap__fan { flex: 1 1 100%; display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .35rem; }
.cmap__fan span { flex: 1 1 14rem; display: flex; align-items: center; gap: .55rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: .6rem .85rem; font-size: .84rem; color: var(--fg-2); }
.cmap__fan i { color: var(--brand); font-size: 1rem; flex: none; }
.dark .cmap__fan i { color: hsl(var(--secondary-400)); }

/* ---- 3 · what you can ship ---- */
.ship__scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-xl); box-shadow: var(--sh-1); background: var(--surface); }
.ship table { width: 100%; border-collapse: collapse; font-size: .92rem; min-width: 34rem; }
.ship th, .ship td { text-align: left; padding: .85rem 1.1rem; border-bottom: 1px solid var(--line); }
.ship thead th { font: 700 .7rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--fg-3); background: var(--surface-2); }
.ship tbody td:first-child { font-weight: 700; color: var(--fg); }
.ship tbody td:not(:first-child) { color: var(--fg-2); }
.ship tbody tr { transition: background var(--dur) var(--ease); }
.ship tbody tr:hover { background: var(--tint); }
.ship tbody tr:last-child td { border-bottom: 0; }

/* ---- 4 · paths ---- */
.path {
  border: 1px solid var(--line); border-radius: var(--radius-xl); margin-bottom: .7rem;
  overflow: hidden; background: var(--surface); box-shadow: var(--sh-1);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.path:hover { box-shadow: var(--sh-3); }
.path[open] { border-color: hsl(var(--secondary-400) / .7); box-shadow: var(--sh-3), 0 0 0 3px hsl(var(--secondary-400) / .14); }
.path summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: .75rem; padding: 1.05rem 1.15rem; font-weight: 700; color: var(--fg); font-size: 1.03rem; }
.path summary::-webkit-details-marker { display: none; }
.path__i { display: inline-grid; place-items: center; width: 2.15rem; height: 2.15rem; border-radius: var(--radius); background: var(--tint-mint); color: var(--brand); font-size: 1.2rem; flex: none; transition: transform var(--dur) var(--ease); }
.dark .path__i { background: hsl(var(--primary-100)); color: hsl(var(--secondary-400)); }
.path[open] .path__i { transform: scale(1.05) rotate(-4deg); }
.path__sub { font-weight: 500; font-size: .84rem; color: var(--fg-3); }
.path__x { margin-left: auto; color: var(--fg-3); transition: transform var(--dur) var(--ease); }
.path[open] .path__x { transform: rotate(180deg); }
.path__body { border-top: 1px solid var(--line); padding: .35rem .55rem .8rem; }
.js .path__body { overflow: hidden; }
.path__note { margin: .65rem .7rem .4rem; padding: .7rem .85rem; background: var(--tint); border: 1px solid hsl(var(--primary-200) / .5); border-radius: var(--radius); font-size: .86rem; color: var(--fg-2); }
.dark .path__note { background: hsl(var(--primary-100)); border-color: hsl(var(--gray-300)); }
.path__note b { color: var(--fg); }
.path__link { display: grid; grid-template-columns: 1fr auto; column-gap: 1rem; align-items: center; padding: .75rem .7rem; border-radius: var(--radius); color: var(--fg); transition: background var(--dur) var(--ease); }
.path__link b { grid-column: 1; font-weight: 700; font-size: .94rem; color: var(--fg); }
.path__link > span { grid-column: 1; color: var(--fg-3); font-size: .855rem; line-height: 1.5; }
.path__link > i { grid-column: 2; grid-row: 1 / 3; color: var(--fg-3); font-size: 1.05rem; transition: transform var(--dur) var(--ease), color var(--dur) var(--ease); }
.path__link:hover { background: var(--tint); text-decoration: none; }
.path__link:hover > i { transform: translateX(4px); color: var(--brand); }
.dark .path__link:hover > i { color: hsl(var(--secondary-400)); }
.path__link code { font-size: .9em; color: var(--fg-2); }
.path__link--flag { background: linear-gradient(90deg, hsl(var(--secondary-400) / .16), transparent 70%); }
.path__link--flag b::after { content: "MCP"; margin-left: .5rem; font: 700 .6rem/1 var(--mono); letter-spacing: .08em; vertical-align: middle; color: var(--brand-fix); background: var(--accent); border-radius: var(--rounded); padding: .2rem .35rem; }

/* ---- 5 · quickstart ---- */
.qs__prereq { background: var(--tint); border: 1px solid hsl(var(--primary-200) / .5); border-radius: var(--radius-xl); padding: 1.1rem 1.25rem; margin-bottom: 1.9rem; }
.dark .qs__prereq { background: hsl(var(--primary-100)); border-color: hsl(var(--gray-300)); }
.qs__prereq-label { display: block; font: 700 .68rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--fg-3); margin-bottom: .7rem; }
.qs__prereq ul { display: grid; gap: .5rem; }
.qs__prereq li { display: flex; align-items: center; gap: .6rem; font-size: .9rem; color: var(--fg-2); }
.qs__prereq li i { color: var(--ok); font-size: 1.05rem; }
.qs__list { counter-reset: q; display: grid; gap: 1.15rem; }
.qs__list > li { counter-increment: q; position: relative; padding-left: 2.6rem; }
.qs__list > li::before { content: counter(q); position: absolute; left: 0; top: -.1rem; width: 1.8rem; height: 1.8rem; display: grid; place-items: center; border-radius: 50%; background: var(--brand-fix); color: #fff; font: 800 .82rem/1 var(--mono); box-shadow: var(--sh-2); }
.qs__list > li > p { font-weight: 600; color: var(--fg); }
.qs__list .run { margin-top: .55rem; box-shadow: var(--sh-2); }

/* ---- 6 · lifecycle — animated + interactive pipeline (signature moment) ---- */
.life__wrap { position: relative; margin-top: .5rem; --p: 0; --c: 0; }
@media (max-width: 720px) { .life__wrap { overflow-x: auto; padding-bottom: .5rem; } }
.life__track { position: absolute; left: 7.14%; right: 7.14%; top: 1.5rem; height: 3px; border-radius: 3px; background: var(--line-2); z-index: 0; }
.life__rail-fill { position: absolute; inset: 0; border-radius: 3px; background: linear-gradient(90deg, hsl(var(--secondary-600)), hsl(var(--primary))); transform: scaleX(var(--p)); transform-origin: left; }
.life__wrap.is-interactive .life__rail-fill { transition: transform .5s var(--ease); }
.dark .life__rail-fill { background: linear-gradient(90deg, hsl(var(--secondary-600)), hsl(var(--secondary-400))); }
.life__comet {
  position: absolute; top: 50%; left: calc(var(--c) * 100%); width: 14px; height: 14px;
  margin: -7px 0 0 -7px; border-radius: 50%; background: hsl(var(--secondary-400));
  box-shadow: 0 0 0 5px hsl(var(--secondary-400) / .25), 0 0 20px 3px hsl(var(--secondary-400) / .7);
  opacity: 0; transition: opacity .3s var(--ease);
}
.life__wrap.is-playing .life__comet,
.life__wrap.is-interactive .life__comet { opacity: 1; }
.life__wrap.is-interactive .life__comet { transition: left .5s var(--ease), opacity .3s var(--ease); }

.life__steps { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(7, 1fr); gap: .5rem; margin: 0; padding: 0; }
@media (max-width: 720px) { .life__steps { grid-template-columns: repeat(7, minmax(5.5rem, 1fr)); min-width: 40rem; } }
.life__steps li { list-style: none; display: flex; }
.life__step {
  width: 100%; display: grid; justify-items: center; gap: .6rem; text-align: center;
  border: 0; background: none; padding: .4rem .2rem; margin: 0; font: inherit; color: inherit; cursor: pointer;
  border-radius: var(--radius);
}
.life__step:focus-visible { outline: 2px solid var(--accent-hi); outline-offset: 2px; }
.life__dot {
  width: 3rem; height: 3rem; border-radius: 50%; display: grid; place-items: center;
  background: var(--surface); border: 2px solid var(--line-2); color: var(--fg-3); font-size: 1.2rem;
  transition: transform .4s var(--ease), background .4s var(--ease), border-color .4s var(--ease), color .4s var(--ease), box-shadow .4s var(--ease);
}
.life__label { font-size: .78rem; font-weight: 600; line-height: 1.3; color: var(--fg-3); transition: color .4s var(--ease); }
.life__step.is-on .life__dot { border-color: transparent; background: var(--brand-fix); color: #fff; box-shadow: 0 0 0 4px hsl(var(--secondary-400) / .2), var(--sh-2); }
.dark .life__step.is-on .life__dot { background: hsl(var(--secondary-400)); color: var(--brand-fix); }
.life__step.is-on .life__label { color: var(--fg); }
.life__step:hover .life__dot { transform: translateY(-2px) scale(1.05); box-shadow: 0 0 0 4px hsl(var(--secondary-400) / .18), var(--sh-3); }
.life__step.is-active .life__dot { transform: scale(1.16); border-color: transparent; background: var(--brand-fix); color: #fff; box-shadow: 0 0 0 6px hsl(var(--secondary-400) / .28), var(--sh-3); }
.dark .life__step.is-active .life__dot { background: hsl(var(--secondary-400)); color: var(--brand-fix); }
.life__step.is-active .life__label { color: var(--fg); }
.life__wrap.is-done .life__steps li:last-child .life__step:not(.is-active) .life__dot { animation: lifePulse 2.6s var(--ease) infinite; }
@keyframes lifePulse {
  0%, 100% { box-shadow: 0 0 0 4px hsl(var(--secondary-400) / .2), var(--sh-2); }
  50%      { box-shadow: 0 0 0 12px hsl(var(--secondary-400) / 0), var(--sh-2); }
}

/* interactive detail panel */
.life__panel {
  margin-top: 2rem; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius-xl); box-shadow: var(--sh-1); padding: clamp(1.15rem, 3vw, 1.6rem);
  min-height: 8.5rem;
}
.life__panel:focus-visible { outline: 2px solid var(--accent-hi); outline-offset: 2px; }
.life__panel-num { display: inline-block; font: 700 .66rem/1 var(--mono); letter-spacing: .13em; text-transform: uppercase; color: var(--brand); margin-bottom: .55rem; }
.dark .life__panel-num { color: hsl(var(--secondary-400)); }
.life__panel-h { font-size: 1.15rem; font-weight: 800; color: var(--fg); margin-bottom: .45rem; }
.life__panel-d { color: var(--fg-2); font-size: .93rem; max-width: 46rem; }
.life__panel-do { margin-top: .9rem; display: flex; flex-wrap: wrap; align-items: center; gap: .5rem .7rem; font-size: .88rem; color: var(--fg-3); }
.life__panel-do > span:first-child { font: 700 .64rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--fg-3); }
.life__panel-do code { background: var(--code-bg) !important; color: hsl(164 72% 74%) !important; font-family: var(--mono); font-size: .82rem; padding: .25rem .5rem !important; border-radius: var(--rounded) !important; }
.life__panel-do a { display: inline-flex; align-items: center; gap: .3rem; font-weight: 700; }

/* ---- 7 · Partners MCP (the one dark block) ---- */
.mcp {
  position: relative; overflow: hidden; border-top: 0;
  background: var(--brand-fix); color: hsl(0 0% 86%);
  border-radius: var(--radius-2xl); padding: clamp(1.9rem, 4.5vw, 3rem);
  margin-block: clamp(3rem, 7vw, 5rem);
  box-shadow: var(--sh-4);
}
.mcp::before { content: ""; position: absolute; inset: -40% -20% auto auto; width: 60%; height: 120%; background: radial-gradient(50% 50% at 70% 20%, hsl(var(--secondary-400) / .22), transparent 70%); pointer-events: none; }
.mcp__h { color: #fff; font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 800; margin: .2rem 0 .8rem; }
.mcp p { color: hsl(0 0% 100% / .8); max-width: var(--readable); }
.mcp strong { color: #fff; }
.mcp code { color: hsl(164 74% 74%); font-family: var(--mono); }
.mcp__run { display: flex; align-items: center; gap: .5rem; margin-top: 1.6rem; max-width: 30rem; background: hsl(0 0% 0% / .28); border: 1px solid hsl(0 0% 100% / .14); border-radius: var(--radius); padding: .65rem .85rem; }
.mcp__run code { font-size: .88rem; color: hsl(0 0% 92%); flex: 1; }
.mcp__run code::before { content: "$ "; color: hsl(164 60% 62%); }
.mcp__run .hl { color: hsl(164 74% 72%); }
.mcp__url { margin-top: .9rem; font: 500 .82rem/1 var(--mono); color: hsl(0 0% 100% / .5); display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }
.copyurl { display: inline-flex; align-items: center; gap: .4rem; font: inherit; cursor: pointer; border: 1px solid hsl(0 0% 100% / .16); background: hsl(0 0% 100% / .06); border-radius: var(--rounded); padding: .2rem .5rem; color: inherit; transition: border-color var(--dur) var(--ease); }
.copyurl code { color: hsl(164 74% 74%); }
.copyurl:hover { border-color: hsl(var(--secondary-400)); }
.copyurl.is-done { color: hsl(var(--secondary-400)); }
.mcp__caps, .mcp__prompts { margin-top: 1.75rem; background: hsl(0 0% 100% / .04); border: 1px solid hsl(0 0% 100% / .1); border-radius: var(--radius-xl); padding: 1.2rem 1.3rem; }
.mcp__cap-label { display: block; font: 700 .66rem/1 var(--mono); letter-spacing: .13em; text-transform: uppercase; color: hsl(var(--secondary-400)); margin-bottom: .9rem; }
.mcp__caps ul { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: .65rem 1.4rem; }
.mcp__caps li { display: flex; align-items: center; gap: .6rem; font-size: .875rem; color: hsl(0 0% 100% / .82); }
.mcp__caps li i { color: hsl(var(--secondary-400)); font-size: 1.05rem; flex: none; }
.mcp__prompts p { display: flex; gap: .6rem; margin: 0; padding: .6rem .8rem; font-size: .875rem; color: hsl(0 0% 100% / .82); border-left: 2px solid hsl(var(--secondary-400) / .6); background: hsl(0 0% 100% / .03); border-radius: 0 var(--rounded) var(--rounded) 0; }
.mcp__prompts p + p { margin-top: .45rem; }
.mcp__prompts i { color: hsl(var(--secondary-400)); flex: none; }
.mcp__prompts em { color: #fff; font-style: normal; font-weight: 600; }
.mcp__foot { margin-top: 1.4rem; font-size: .85rem; color: hsl(0 0% 100% / .55); }
.go { display: inline-flex; align-items: center; gap: .45rem; font-weight: 700; font-size: .92rem; transition: gap var(--dur) var(--ease); }
.go:hover { gap: .7rem; }
.go--onlight { margin-top: 1.4rem; color: hsl(var(--secondary-400)); }
.go--foot { margin-top: 1.75rem; }

/* ---- 8 · index (searchable) ---- */
.idx__search { display: flex; align-items: center; gap: .65rem; border: 1px solid var(--line-2); border-radius: var(--radius); padding: .7rem .95rem; margin-bottom: 1.9rem; background: var(--surface); box-shadow: var(--sh-1); transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.idx__search:focus-within { border-color: hsl(var(--primary-300)); box-shadow: var(--sh-focus); }
.idx__search > i { color: var(--fg-3); font-size: 1.1rem; }
.idx__search input { flex: 1; min-width: 0; border: 0; background: none; font: inherit; color: var(--fg); outline: none; }
.idx__search input::placeholder { color: var(--fg-3); }
.idx__list { display: grid; gap: 1.6rem; }
.idx__group > h3 { font: 700 .74rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--fg-3); padding-bottom: .6rem; border-bottom: 1px solid var(--line-2); }
.idx__row { display: grid; grid-template-columns: 15rem 1fr; gap: 1rem; align-items: baseline; padding: .75rem .5rem; margin: 0 -.5rem; border-radius: var(--radius); border-bottom: 1px solid var(--line); color: var(--fg); transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease); }
.idx__row:hover { text-decoration: none; background: var(--tint); padding-left: .9rem; }
.idx__k { font-weight: 700; font-size: .93rem; }
.idx__d { color: var(--fg-3); font-size: .87rem; }
.idx__empty { color: var(--fg-3); font-size: .92rem; padding: .7rem 0; }
mark { background: hsl(var(--secondary-400) / .55); color: inherit; border-radius: 2px; padding: 0 .05em; }

/* link-review markers (concept only — strip before ship) */
[data-link-review] .idx__k::after,
[data-link-review] > b::after,
.launch__sub span[data-link-review]::after,
.path__note span[data-link-review]::after,
.qs__prereq span[data-link-review]::after,
.foot__cta span[data-link-review]::after { content: "\00B0"; margin-left: .12em; font-size: .8em; vertical-align: super; color: var(--warn); font-weight: 700; }
.life__panel-do a[data-link-review]::after { content: "\00B0"; margin-left: .12em; font-size: .8em; vertical-align: super; font-weight: 700; color: hsl(var(--danger-600)); }
[data-link-review="stub"] .idx__k::after,
[data-link-review="stub"] > b::after,
.launch__sub span[data-link-review="stub"]::after,
.qs__prereq span[data-link-review="stub"]::after,
.foot__cta span[data-link-review="stub"]::after { color: hsl(var(--danger-600)); }
.idx__legend { margin-top: 1.1rem; font: 500 .8rem/1.5 var(--mono); color: var(--fg-3); }
.idx__legend b { color: hsl(var(--danger-600)); } .idx__legend i { color: var(--warn); font-style: normal; }

/* ---- 11 · get help ---- */
.help__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: .9rem; }
.help__grid a {
  display: grid; grid-template-columns: 2.2rem 1fr; gap: .1rem 1rem; align-items: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-xl);
  padding: 1.1rem 1.2rem; color: var(--fg); box-shadow: var(--sh-1);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.help__grid a:hover { text-decoration: none; transform: translateY(-3px); box-shadow: var(--sh-3); border-color: var(--line-2); }
.help__grid i { grid-row: 1 / 3; font-size: 1.35rem; color: var(--brand); }
.dark .help__grid i { color: hsl(var(--secondary-400)); }
.help__grid b { font-size: .93rem; }
.help__grid span { color: var(--fg-3); font-size: .84rem; }

/* ---- footer ---- */
.foot { border-top: 1px solid var(--line); margin-top: 2rem; background: var(--surface); }
.foot__cta {
  max-width: var(--max); margin: 0 auto; padding: clamp(1.5rem, 4vw, 2.25rem) var(--pad);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.25rem;
  border-bottom: 1px solid var(--line);
}
.foot__cta p { display: flex; flex-wrap: wrap; gap: .3rem 1.3rem; font-size: .95rem; }
.foot__cta p span { color: var(--fg); font-weight: 600; }
.foot__cta p span::before { content: "\203A "; color: var(--accent-hi); }
.foot__row { max-width: var(--max); margin: 0 auto; padding: 1.6rem var(--pad); display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.75rem; font-size: .86rem; }
.brand--sm { color: var(--fg-3); font-weight: 600; gap: .4rem; }
.brand--sm svg { color: var(--fg-3); }
.foot__row nav { display: flex; flex-wrap: wrap; gap: 1.1rem; }
.foot__row nav a { color: var(--fg-2); font-weight: 600; }
.foot__row nav a:hover { color: var(--fg); text-decoration: none; }
.foot__meta { margin-left: auto; color: var(--fg-3); font: 500 .8rem/1 var(--mono); }

/* ---- reveal / micro-motion ---- */
.reveal { opacity: 0; transform: translateY(24px) scale(.985); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.stagger > * { opacity: 0; transform: translateY(18px); transition: opacity .5s var(--ease), transform .5s cubic-bezier(.22,.68,.28,1.1); }
.stagger.is-visible > * { opacity: 1; transform: none; }
.toast { position: fixed; left: 50%; bottom: 1.6rem; transform: translate(-50%, 2rem) scale(.9); background: var(--fg); color: var(--canvas); padding: .55rem 1.15rem .55rem 1rem; border-radius: var(--rounded-full); font-size: .82rem; font-weight: 700; box-shadow: var(--sh-4); opacity: 0; pointer-events: none; z-index: 200; transition: opacity .3s var(--ease), transform .4s cubic-bezier(.18,.9,.28,1.3); display: flex; align-items: center; gap: .45rem; }
.toast::before { content: ""; width: .9rem; height: .9rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px hsl(var(--secondary-400) / .3); }
.toast.is-shown { opacity: 1; transform: translate(-50%, 0) scale(1); }

/* ---- juice: scroll progress ---- */
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 60; background: linear-gradient(90deg, hsl(var(--secondary-500)), hsl(var(--primary))); box-shadow: 0 0 12px hsl(var(--secondary-400) / .7); transition: width .12s linear; }
.dark .progress { background: linear-gradient(90deg, hsl(var(--secondary-500)), hsl(var(--secondary-400))); }

/* ---- juice: cursor spotlight on cards ---- */
.concepts__grid > div, .help__grid a, .path { position: relative; overflow: hidden; }
.concepts__grid > div::after, .help__grid a::after, .mcp::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(14rem 14rem at var(--mx, 50%) var(--my, 50%), hsl(var(--secondary-400) / .16), transparent 62%);
  opacity: 0; transition: opacity .35s var(--ease);
}
.mcp::after { background: radial-gradient(22rem 22rem at var(--mx, 80%) var(--my, 20%), hsl(var(--secondary-400) / .16), transparent 60%); }
.concepts__grid > div:hover::after, .help__grid a:hover::after, .mcp:hover::after { opacity: 1; }

/* ---- juice: sparks on copy ---- */
.spark { position: fixed; width: 6px; height: 6px; margin: -3px 0 0 -3px; border-radius: 50%; background: hsl(var(--secondary-500)); box-shadow: 0 0 8px hsl(var(--secondary-400)); pointer-events: none; z-index: 300; }

/* ---- juice: CTA shimmer + press ---- */
.cta { position: relative; overflow: hidden; }
.cta::after { content: ""; position: absolute; top: 0; left: -60%; width: 45%; height: 100%; background: linear-gradient(100deg, transparent, hsl(0 0% 100% / .55), transparent); transform: skewX(-18deg); animation: ctaShimmer 5s ease-in-out infinite; }
@keyframes ctaShimmer { 0%, 55% { left: -60%; } 100% { left: 140%; } }

/* ---- juice: hero card tilt + float ---- */
.launch__art { perspective: 1000px; }
.appcard { transform: perspective(1000px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) rotate(1.2deg); transition: transform .35s var(--ease), box-shadow .35s var(--ease); }
.launch:hover .appcard { transform: perspective(1000px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); }
@keyframes cardFloat { 0%, 100% { translate: 0 0; } 50% { translate: 0 -7px; } }
.appcard { animation: cardFloat 6s ease-in-out infinite; }

/* ---- juice: theme toggle + brand ---- */
.tmode i { transition: transform .5s cubic-bezier(.3,1.4,.4,1); display: inline-block; }
.tmode:hover i { transform: rotate(24deg); }
.tmode:active i { transform: rotate(180deg) scale(.7); }
body { transition: background-color .45s var(--ease), color .45s var(--ease); }

/* ---- juice: lifecycle activation ring ---- */
.life__dot { position: relative; }
.life__dot::before { content: ""; position: absolute; inset: -2px; border-radius: 50%; border: 2px solid hsl(var(--secondary-400)); opacity: 0; }
.life__step.is-on .life__dot::before,
.life__step.is-active .life__dot::before { animation: lifeRing .8s var(--ease) 1; }
@keyframes lifeRing { 0% { transform: scale(1); opacity: .8; } 100% { transform: scale(2.2); opacity: 0; } }
.life__comet::after { content: ""; position: absolute; right: 6px; top: 50%; width: 26px; height: 4px; margin-top: -2px; border-radius: 4px; background: linear-gradient(90deg, transparent, hsl(var(--secondary-400) / .8)); }

/* ---- juice: code block confirm ---- */
.run.is-copied, .mcp__run.is-copied { border-color: hsl(var(--secondary-400)); box-shadow: 0 0 0 3px hsl(var(--secondary-400) / .25); }
.run, .mcp__run { transition: border-color .3s var(--ease), box-shadow .3s var(--ease); }
.run__copy .hgi, .copyurl .hgi { transition: transform .3s cubic-bezier(.3,1.5,.4,1); }
.run__copy.is-done .hgi, .copyurl.is-done .hgi { transform: scale(1.25) rotate(-8deg); }

/* ---- responsive ---- */
@media (max-width: 900px) {
  .launch { grid-template-columns: 1fr; }
  .launch__art { justify-content: flex-start; }
  .appcard { transform: none; max-width: 26rem; }
  .launch:hover .appcard { transform: translateY(-2px); }
}
@media (max-width: 720px) {
  .bar__nav > a:not(.cta) { display: none; }
  .idx__row { grid-template-columns: 1fr; gap: .15rem; }
  .cmap { flex-direction: column; align-items: stretch; text-align: center; }
  .cmap__node { min-width: 0; }
  .cmap__arrow { width: 2px; height: 2rem; align-self: center; margin: .15rem 0; }
  .cmap__arrow::after { right: 50%; top: auto; bottom: -1px; transform: translateX(50%) rotate(135deg); }
  .cmap__arrow span { position: static; transform: none; margin-bottom: .3rem; }
  .cmap__fan span { flex-basis: 100%; }
  .foot__cta { flex-direction: column; align-items: flex-start; }
  .path__sub { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
  .reveal, .stagger > * { opacity: 1 !important; transform: none !important; }
  .life__wrap { --p: 1 !important; }
  .life__step .life__dot { border-color: transparent; background: var(--brand-fix); color: #fff; }
  .life__step.is-active .life__dot { transform: scale(1.16); }
  .life__comet { display: none; }
}