/* =========================================================================
   story.css: the WorkPerks case study, black edition.
   True black, soft white, one warm accent (the WorkPerks orange) used for
   what is live: the cursor, the lit step, the suffix on a number. Figtree
   carries display, labels and navigation; Geist the reading text; mono is
   kept for tool names only. Light comes from a few blurred glows rather
   than from surfaces, so the warm chat UI reads as the subject.
   ========================================================================= */
:root {
  --bg: #000000; --bg-2: #0B0B0C; --bg-3: #131315; --bg-4: #1B1B1E;
  --fg: #FFFFFF; --fg-2: #A3A3A3; --fg-3: #8A8A8A;
  --line: rgba(255, 255, 255, 0.09); --line-2: rgba(255, 255, 255, 0.16);
  --accent: #FF7A1A; --accent-2: #FFA866; --accent-soft: rgba(255, 122, 26, 0.10);
  --signal: #FF7A1A;
  --ok: #8FD3A7;
  --display: 'Figtree', 'Geist', ui-sans-serif, system-ui, sans-serif;
  --sans: 'Geist', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'Space Mono', 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --r: 8px; --r-lg: 14px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --wrap: 1280px; --gutter: clamp(1.25rem, 4vw, 3.5rem); --bar: 64px; --gap: clamp(2rem, 5vw, 5rem);
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--bar) + 1rem); overflow-x: clip; background: var(--bg); }
body { margin: 0; background: var(--bg); color: var(--fg-2); font: 400 1.0625rem/1.65 var(--sans); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
button { font: inherit; color: inherit; }
::selection { background: var(--accent); color: #111214; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.vh, .visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 1rem; top: -4rem; z-index: 100; padding: 0.6rem 1rem; background: var(--accent); color: #111214; }
.skip:focus { top: 1rem; }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gutter); }

/* ------------------------------------------------------------- type */
.h-hero, .h-statement, .h-sec, .h-sub { margin: 0; font-family: var(--display); font-weight: 500; color: var(--fg); text-wrap: balance; }
.h-hero { font-size: clamp(2.6rem, 4.8vw, 4.8rem); line-height: 0.98; letter-spacing: -0.045em; }
.h-statement { font-size: clamp(2.3rem, 5.2vw, 5.4rem); line-height: 0.98; letter-spacing: -0.045em; max-width: 20ch; }
.h-sec { font-size: clamp(2rem, 3.8vw, 3.8rem); line-height: 1.02; letter-spacing: -0.04em; max-width: 22ch; }
.h-sub { font-size: clamp(1.4rem, 2.1vw, 1.9rem); line-height: 1.15; letter-spacing: -0.025em; }
.h-statement em, .h-sec em, .h-hero em { font-style: normal; color: var(--fg-3); }
.lede { max-width: 34rem; margin: 1.6rem 0 0; font-size: clamp(1.05rem, 1.3vw, 1.2rem); line-height: 1.55; color: var(--fg-2); }
.body { max-width: 38rem; margin: 1.5rem 0 0; font-size: 1.08rem; line-height: 1.65; color: var(--fg-2); }
.body-sm { max-width: 34rem; margin: 0.9rem 0 0; font-size: 0.98rem; line-height: 1.6; color: var(--fg-2); }
.fine { margin: 1rem 0 0; font-size: 0.84rem; color: var(--fg-3); }
.label { margin: 0; font: 400 0.7rem/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); }
.kicker { margin: 0 0 1rem; font: 400 0.72rem/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }

/* the chapter marker: a thin rule, a number, a name, sometimes a date */
.mark { display: flex; gap: 2.2rem; margin: 0 0 2.2rem; padding: 0; font: 500 0.8rem/1.3 var(--display); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.mark span:first-child { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--fg); }
.mark span:first-child::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 10px var(--signal); }
.mark span:first-child::after { content: '/'; margin-left: -0.35rem; color: var(--fg-3); }

/* label / value columns, each on its own rule */
.cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; margin: 2.4rem 0 0; }
.cols div { padding: 0.1rem 0 0.3rem 1rem; border-left: 1px solid var(--line-2); }
.cols dt { font: 400 0.68rem/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.cols dd { margin: 0.55rem 0 0; font: 500 0.98rem/1.35 var(--display); color: var(--fg); }

/* ------------------------------------------------------------- bar */
.bar { position: fixed; z-index: 50; top: 0; left: 0; right: 0; height: var(--bar); display: flex; align-items: center; gap: 2rem; padding-inline: var(--gutter); background: rgba(17, 18, 20, 0.94); border-bottom: 1px solid var(--line); }
.bar-id { display: flex; align-items: center; gap: 0.8rem; text-decoration: none; font: 400 0.74rem var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg); }
.bar-id b { display: grid; place-items: center; width: 30px; height: 30px; background: var(--fg); color: var(--bg); font-weight: 700; font-size: 0.68rem; }
.bar-nav { display: flex; gap: 1.8rem; margin: 0 auto; }
.bar-nav a { font: 400 0.72rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-2); }
.bar-nav a:hover { color: var(--fg); }
.btn { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.7rem 1.1rem; border: 1px solid var(--line-2); border-radius: 2px; text-decoration: none; font: 400 0.72rem/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg); transition: background 0.25s, color 0.25s, border-color 0.25s; }
.btn-solid { background: var(--fg); border-color: var(--fg); color: var(--bg); }
.btn-solid:hover { background: var(--accent); border-color: var(--accent); color: #000; }
.bar-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; }
.bar-progress i { display: block; height: 100%; background: var(--signal); transform-origin: left; transform: scaleX(0); }
@media (max-width: 1080px) { .bar-nav { display: none; } .bar .btn { margin-left: auto; } .bar-id span { display: none; } }
/* the Chapters menu, below 1080px (chapterMenu in the page script) */
.bar-menu { display: none; }
@media (max-width: 1080px) {
  .bar { gap: 0.75rem; }
  .bar-menu { display: inline-flex; align-items: center; min-height: 2.5rem; margin-left: auto; padding: 0 0.9rem; border: 1px solid rgba(255, 255, 255, 0.5); border-radius: var(--r); background: none; color: var(--fg); font: 500 0.74rem/1 var(--display); letter-spacing: 0.04em; text-transform: uppercase; cursor: pointer; }
  .bar-menu::after { content: ''; width: 6px; height: 6px; margin: -3px 0 0 0.55rem; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg); transition: transform 0.25s var(--ease); }
  .bar-menu[aria-expanded="true"]::after { margin-top: 3px; transform: rotate(-135deg); }
  .bar .btn { margin-left: 0; }
  .bar-nav.is-open { display: flex; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; gap: 0; margin: 0; padding: 0.25rem var(--gutter) 1rem; background: var(--bg); border-bottom: 1px solid var(--line); }
  .bar-nav.is-open a { display: flex; align-items: center; min-height: 3rem; border-bottom: 1px solid var(--line); text-decoration: none; }
  .bar-nav.is-open a:last-child { border-bottom: 0; }
}
@media (max-width: 420px) { .bar .btn { padding-inline: 0.75rem; } }

.sec { padding-block: clamp(6rem, 12vw, 11rem); }

/* animated links (adapted from Skiper UI's skiper40, credited in the footer) */
.slink { position: relative; display: inline-flex; align-items: center; text-decoration: none; color: inherit; }
.slink::before { content: ''; position: absolute; left: 0; bottom: -0.15em; width: 100%; height: 1px; background: currentColor; pointer-events: none; transform: scaleX(0); transform-origin: right; transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.slink:hover::before, .slink:focus-visible::before { transform: scaleX(1); transform-origin: left; }
.sl-arr { flex: none; width: 0.55em; height: 0.55em; margin-left: 0.4em; fill: none; stroke: currentColor; stroke-width: 1.25; stroke-linecap: round; stroke-linejoin: round; opacity: 0; transform: translateY(0.25em); transition: opacity 0.3s, transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.slink:hover .sl-arr, .slink:focus-visible .sl-arr { opacity: 1; transform: none; }
.sl-lg { font: 500 clamp(1.2rem, 1.9vw, 1.7rem)/1.3 var(--display); letter-spacing: -0.02em; color: var(--fg); }
@media (hover: none) { .sl-lg .sl-arr { opacity: 1; transform: none; } }

/* ============================================================= 01 -> 02 */
.pin { --p: 0; position: relative; }
.pin-stage { position: sticky; top: 0; height: 100svh; overflow: hidden; }
.act-a { height: 230svh; }
.act-a .pin-stage { padding-top: var(--bar); }
.a-surface { position: absolute; inset: var(--bar) 0 0 0; background: var(--bg-2); border: 1px solid var(--line);
  clip-path: inset(calc(12% - 10% * var(--p)) calc(4% - 2.5% * var(--p)) calc(12% - 10% * var(--p)) calc(52% - 50.5% * var(--p)) round 18px); }
.a-grid { position: relative; height: 100%; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--gap); align-items: center; }
.a-hero, .a-phone { grid-column: 1; grid-row: 1; }
.a-built { grid-column: 2; grid-row: 1; }
.a-hero { position: relative; z-index: 1; opacity: calc(1 - var(--p) * 2.2); transform: translateY(calc(var(--p) * -40px)); }
.a-phone { position: relative; z-index: 2; display: grid; justify-items: center;
  transform: translateX(calc((1 - var(--p)) * (100% + var(--gap)))) scale(calc(1.04 - var(--p) * 0.04)); }
.a-phone .phone { height: min(660px, calc(100svh - var(--bar) - 6rem)); }
.a-built { position: relative; z-index: 1; opacity: calc((var(--p) - 0.45) * 2.4); transform: translateY(calc((1 - var(--p)) * 40px)); }
.asks { list-style: none; margin: 2rem 0 0; padding: 0; border-top: 1px solid var(--line); max-width: 32rem; }
.asks li, .asks button { display: flex; align-items: baseline; gap: 1rem; width: 100%; padding: 0.85rem 0; border: 0; border-bottom: 1px solid var(--line); background: none; text-align: left; font: 500 1.02rem var(--display); color: var(--fg-3); transition: color 0.35s; }
.asks span { flex: none; width: 6.5rem; font: 400 0.66rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.asks.is-auto li::after { content: ''; align-self: center; width: 6px; height: 6px; margin-left: auto; background: transparent; transition: background 0.35s; }
.asks.is-auto li.is-now { color: var(--fg); }
.asks.is-auto li.is-now::after { background: var(--signal); }
.asks button { color: var(--fg); cursor: pointer; }
.asks button::after { content: '\2192'; margin-left: auto; color: var(--fg-3); transition: transform 0.3s var(--ease), color 0.2s; }
.asks button:hover { color: var(--accent-2); }
.asks button:hover::after { transform: translateX(4px); color: var(--accent); }

/* ============================================================= 03 problem */
.pb-row { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: var(--gap); align-items: end; margin-top: 2.5rem; }
.figs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; margin: 0; }
.figs div { padding-left: 1rem; border-left: 1px solid var(--line-2); }
.figs dt { font: 400 0.68rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.figs dd { margin: 0.3rem 0 0; font: 500 clamp(2.6rem, 4.6vw, 4.4rem)/1 var(--display); letter-spacing: -0.04em; color: var(--fg); }

/* the journey, pinned */
.act-c { height: 200svh; }
.act-c .pin-stage { display: grid; align-items: center; padding-top: var(--bar); border-top: 1px solid var(--line); background: var(--bg-2); }
.c-wrap { display: grid; gap: clamp(2.5rem, 6vh, 4.5rem); }
.c-head { position: relative; display: grid; justify-items: center; text-align: center; }
.c-head .kicker { position: relative; min-width: 14rem; }
.c-l0, .c-n0 { opacity: clamp(0, calc((0.55 - var(--p)) * 6), 1); }
.c-l1, .c-n1 { position: absolute; left: 0; right: 0; top: 0; text-align: center; opacity: clamp(0, calc((var(--p) - 0.5) * 6), 1); }
.c-l1 { color: var(--accent); }
.c-flow { display: grid; gap: 2.5rem; min-width: 0; }
.c-steps { --k: clamp(0, calc(var(--p) * 1.5), 1); position: relative; list-style: none; margin: 0 auto; padding: 0; display: flex; width: calc(100% - (100% - min(100%, 760px)) * var(--k)); }
.c-steps::before { content: ''; position: absolute; top: 6px; left: var(--ll, 7%); right: var(--lr, 7%); height: 1px; background: var(--fg-2); }
.c-steps li { position: relative; flex: 1 1 0; min-width: 0; padding-top: 30px; text-align: center; font: 500 clamp(0.95rem, 1.3vw, 1.15rem) var(--display); color: var(--fg); white-space: nowrap; }
.c-steps li i { position: absolute; top: 0; left: 50%; width: 13px; height: 13px; margin-left: -6.5px; border: 1px solid var(--fg-2); background: var(--bg-2); transition: background 0.4s, border-color 0.4s; }
.c-steps .drop { flex-grow: max(0, calc(1 - var(--k) * 1.05)); opacity: max(0, calc(1 - var(--p) * 2.6)); overflow: hidden; }
.c-steps .drop span { display: inline-block; color: var(--fg-3); }
.c-steps .swap span { display: block; }
.c-steps .swap .b { position: absolute; left: 0; right: 0; top: 30px; }
.c-steps .swap .a { opacity: clamp(0, calc((0.62 - var(--p)) * 6), 1); }
.c-steps .swap .b { opacity: clamp(0, calc((var(--p) - 0.55) * 6), 1); }
.act-c.is-after .c-steps .swap:nth-child(4) i { background: var(--signal); border-color: var(--signal); }
.act-c.is-after .c-steps .swap:nth-child(4) .b { color: var(--accent); }
.c-ask { --a: clamp(0, calc((var(--p) - 0.62) * 3.2), 1); justify-self: center; display: flex; align-items: center; justify-content: space-between; gap: 1rem; width: min(540px, 100%); padding: 0.5rem 0.5rem 0.5rem 1.3rem; border: 1px solid var(--line-2); border-radius: 0; background: var(--bg-3);
  clip-path: inset(0 calc((1 - var(--a)) * 50%) 0 calc((1 - var(--a)) * 50%) round 999px); opacity: var(--a); font-size: 1.05rem; color: var(--fg); }
.c-ask i { display: grid; place-items: center; flex: none; width: 2.3rem; height: 2.3rem; background: var(--fg); color: var(--bg); font-style: normal; }
.c-typed { min-height: 1.5em; }
.c-typed::after { content: ''; display: inline-block; width: 1.5px; height: 1.1em; margin-left: 2px; vertical-align: -0.15em; background: var(--signal); animation: caret 1s steps(1) infinite; }
@keyframes caret { 50% { opacity: 0; } }
.c-note { position: relative; margin: 0; text-align: center; color: var(--fg-2); }
.c-old { display: none; }

/* ============================================================= 04 conversational design */
.story { display: grid; grid-template-columns: 420px minmax(0, 1fr); gap: clamp(3rem, 7vw, 7rem); margin-top: clamp(3rem, 6vw, 5rem); }
.story-phone { position: relative; }
.story-stick { position: sticky; top: calc(var(--bar) + 2rem); display: grid; justify-items: center; }
.story-stick .phone { z-index: 2; transition: transform 0.7s var(--ease), opacity 0.6s var(--ease); }
.cd-app { position: absolute; z-index: 3; top: 30px; left: 140px; width: 290px; margin: 0; opacity: 0; transform: translateX(-50px) scale(0.95); transition: opacity 0.5s var(--ease), transform 0.8s var(--ease); pointer-events: none; }
.cd-app img { width: 100%; border-radius: 34px; box-shadow: 0 40px 90px -30px rgba(255, 122, 26, 0.25); }
.story-stick.is-app .cd-app { opacity: 1; transform: none; }
.story-stick.is-app .phone { transform: translateX(-40px) scale(0.95); opacity: 0.35; }
.story-src { max-width: 22rem; margin: 1.2rem 0 0; font: 400 0.68rem/1.5 var(--mono); letter-spacing: 0.04em; text-align: center; color: var(--fg-3); }
.story-steps { list-style: none; margin: 0; padding: 0; }
.story-steps li { display: flex; flex-direction: column; justify-content: center; min-height: 72svh; padding-left: 1.5rem; border-left: 1px solid var(--line); transition: border-color 0.6s var(--ease); }
.story-steps li.is-on { border-left-color: var(--accent); }
/* a step not being read dims by colour, not opacity, so its text stays legible */
.story-steps li h3, .story-steps li p:not(.st-k) { transition: color 0.6s var(--ease); }
.story-steps li:not(.is-on) h3, .story-steps li:not(.is-on) p:not(.st-k) { color: var(--fg-3); }
/* Pause / Play for a demo that plays itself, and Play in the phone (story.js) */
.ap-toggle { justify-self: center; align-self: center; margin-top: 1rem; min-height: 2.75rem; padding: 0 1.1rem; border: 1px solid var(--line-2); border-radius: 999px; background: transparent; color: var(--fg-2); font: 500 0.72rem var(--display); letter-spacing: 0.06em; text-transform: uppercase; cursor: pointer; transition: color 0.2s, border-color 0.2s; }
.ap-toggle:hover { color: var(--fg); border-color: var(--fg-3); }
.st-play { align-self: flex-start; margin-top: 1.2rem; }
.st-k { margin: 0 0 0.9rem; font: 400 0.72rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.story-steps h3 { margin: 0; font: 500 clamp(1.8rem, 3vw, 2.7rem)/1.06 var(--display); letter-spacing: -0.03em; color: var(--fg); }
.story-steps p:not(.st-k) { max-width: 32rem; margin: 1rem 0 0; font-size: 1.05rem; line-height: 1.65; color: var(--fg-2); }
.st-route { align-self: flex-start; margin-top: 1.2rem; padding: 0.35rem 0.6rem; border: 1px solid var(--line-2); border-radius: 3px; font: 400 0.76rem/1.4 var(--mono); color: var(--accent-2); }
.st-route:empty { display: none; }
#phone-cd .dm-hl { border-radius: 4px; background: rgba(204, 101, 0, 0.07); box-shadow: inset 2px 0 0 #CC6500; transition: background 0.3s; }

.phr { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr); gap: var(--gap); align-items: center; margin-top: clamp(6rem, 10vw, 9rem); padding-top: 2.5rem; border-top: 1px solid var(--line); }
.cv { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); align-items: center; }
.cv-says { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.1rem; justify-items: start; position: relative; z-index: 1; }
.cv-says span { display: inline-block; padding: 0.45rem 0; color: var(--fg-3); font: 500 clamp(1.05rem, 1.45vw, 1.3rem)/1.3 var(--display); transition: color 0.35s; }
.cv-says span::before { content: '\201C'; } .cv-says span::after { content: '\201D'; }
.cv-says span.is-on { color: var(--fg); }
.cv-lines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
.cv-lines path { fill: none; stroke: var(--line-2); stroke-width: 1; transition: stroke 0.3s; }
.cv-lines path.is-on { stroke: var(--accent); stroke-width: 1.25; stroke-dasharray: 4 5; animation: cvFlow 0.9s linear infinite; }
@keyframes cvFlow { to { stroke-dashoffset: -9; } }
.cv-outs { display: grid; gap: 1.5rem; position: relative; z-index: 1; }
.cv-out { padding: 0.25rem 0 0.35rem 1.1rem; border-left: 1px solid var(--line-2); transition: border-color 0.35s; }
.cv-out.is-on { border-left-color: var(--accent); }
.cv-out:not(.is-on) .cv-tool, .cv-out:not(.is-on) .cv-ans, .cv-out:not(.is-on) .cv-why { color: var(--fg-3); }
.cv-tool { margin: 0; font: 400 0.76rem/1.4 var(--mono); color: var(--accent-2); }
.cv-tool i { font-style: normal; color: var(--fg-3); margin-left: 0.4rem; }
.cv-ans { margin: 0.35rem 0 0; font: 500 clamp(1.3rem, 2vw, 1.75rem)/1.15 var(--display); letter-spacing: -0.02em; color: var(--fg); }
.cv-why { margin: 0.3rem 0 0; font-size: 0.9rem; color: var(--fg-2); }
.rec { margin-top: clamp(4rem, 8vw, 6rem); }
.cv-rec { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.cv-rec li { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 15rem); gap: 1.5rem; align-items: baseline; padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
.cv-rec q { color: var(--fg); font: 500 1.1rem/1.4 var(--display); quotes: '\201C' '\201D'; }
.cv-rec b { font-weight: 400; color: var(--fg-2); }
.cv-rec b::before { content: '\2192\00a0'; color: var(--fg-3); }
.cv-rec i { font: 400 0.7rem/1.4 var(--mono); font-style: normal; letter-spacing: 0.08em; text-transform: uppercase; text-align: right; }
.cv-rec .ok { color: var(--ok); } .cv-rec .no { color: var(--signal); }
.trust { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--gap); margin-top: clamp(5rem, 9vw, 8rem); align-items: start; }
.scope { margin: 0; border-top: 1px solid var(--line); }
.scope div { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: 0.9rem 0; border-bottom: 1px solid var(--line); }
.scope dt { font: 500 0.98rem var(--display); color: var(--fg); }
.scope dd { margin: 0; font-size: 0.95rem; line-height: 1.5; color: var(--fg-2); }
.mini { display: grid; gap: 0.5rem; padding: 1rem 0; border-top: 1px solid var(--line); }
.mini .dm-turn { margin: 0; }
.mini .dm-bub { font-size: 12.5px; }
.mini button { pointer-events: none; }
.voice-q { justify-self: end; margin: 0; padding: 0.45rem 0.8rem; border-radius: 16px 16px 5px 16px; background: linear-gradient(160deg, #B85A00, #9A4A00); color: #fff; font-size: 0.85rem; }
.ba-wrap { display: grid; grid-template-columns: minmax(0, 0.75fr) minmax(0, 2fr); gap: var(--gap); margin-top: clamp(5rem, 9vw, 8rem); padding-top: 2.5rem; border-top: 1px solid var(--line); align-items: start; }
.ba-switch { display: flex; gap: 1.5rem; margin: 1.5rem 0 0; }
.ba-switch span { padding-bottom: 0.35rem; border-bottom: 1px solid transparent; font: 400 0.72rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); transition: color 0.3s, border-color 0.3s; }
.ba-switch span.is-on { color: var(--fg); border-bottom-color: var(--accent); }
.ba { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.ba li { display: grid; grid-template-rows: auto 1fr auto; align-items: start; gap: 0.9rem; }
.ba-q { justify-self: end; margin: 0; padding: 0.5rem 0.85rem; border-radius: 16px 16px 5px 16px; background: linear-gradient(160deg, #B85A00, #9A4A00); color: #fff; font-size: 0.9rem; }
.ba-b { display: grid; align-content: start; gap: 0.55rem; padding: 0.95rem 1rem; border-radius: 6px 18px 18px 18px; background: #FBF8F4; color: #3C2A1E; font-size: 0.9rem; line-height: 1.5; }
.ba-b p { margin: 0; }
.ba-b.is-after { display: none; }
.ba.is-after .ba-b.is-before { display: none; }
.ba.is-after .ba-b.is-after { display: grid; animation: arrive 0.5s var(--ease) both; }
.ba:not(.is-after) .ba-b.is-before { animation: arrive 0.5s var(--ease) both; }
.ba-miss { font: 700 0.66rem/1.3 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: #B4532A; }
.ba-lbl { font: 400 0.64rem/1.3 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: rgba(60,42,30,0.72); }
.ba-chips { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.ba-chips i { padding: 0.28rem 0.6rem; border-radius: 999px; border: 1px solid rgba(160,78,0,0.26); font-style: normal; font-size: 0.78rem; font-weight: 600; color: #8A4A12; }
.ba-f { padding: 0 0.3rem; border-radius: 3px; background: rgba(204,101,0,0.12); font: 400 0.76rem/1.5 var(--mono); font-style: normal; color: #A04E00; }
.ba-rows { display: grid; border-top: 1px solid rgba(60,42,30,0.1); }
.ba-rows span { padding: 0.35rem 0; border-bottom: 1px solid rgba(60,42,30,0.1); font-size: 0.82rem; color: rgba(42,28,18,0.68); }
.ba-why { margin: 0; font-size: 0.9rem; color: var(--fg-2); }

/* ============================================================= 05 how the AI works */
.act-e { height: 200svh; }
.act-e .pin-stage { display: grid; align-items: center; padding-top: var(--bar); background: var(--bg-2); border-top: 1px solid var(--line); }
.e-wrap { display: grid; gap: clamp(2rem, 5vh, 3.5rem); }
.e-head .mark { margin-bottom: 1.5rem; }
.sys { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: clamp(1rem, 2.2vw, 2rem); }
.sys li { --f: 0; position: relative; display: grid; grid-template-rows: auto 130px auto; align-content: start; gap: 0.8rem; opacity: 0.3; transition: opacity 0.5s var(--ease); }
.sys li.is-on { opacity: 1; }
.sys-k { font: 400 0.66rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.sys li.is-on .sys-k { color: var(--fg); }
.sys-node { position: relative; display: grid; align-content: center; gap: 0.35rem; padding: 0.9rem 1rem; border: 1px solid var(--line-2); border-radius: var(--r); background: var(--bg-3); transition: border-color 0.4s; }
.sys li.is-on .sys-node { border-color: var(--fg-2); }
.sys-node::after { content: ''; position: absolute; top: 50%; left: 100%; width: clamp(1rem, 2.2vw, 2rem); height: 1px; background: linear-gradient(90deg, var(--accent) calc(var(--f) * 100%), var(--line-2) calc(var(--f) * 100%)); }
.sys li:last-child .sys-node::after { display: none; }
.sys-node.is-ai { background: var(--accent-soft); }
.sys li.is-on .sys-node.is-ai { border-color: var(--accent); }
.sys-node code { font: 700 0.85rem/1.3 var(--mono); color: var(--accent-2); }
.sys-node small { font: 400 0.68rem/1.5 var(--mono); color: var(--fg-2); }
.sys-node b { font: 500 1rem var(--display); color: var(--fg); }
.sys-me { justify-self: start; margin: 0; padding: 0.5rem 0.8rem; border-radius: 16px 16px 5px 16px; background: linear-gradient(160deg, #B85A00, #9A4A00); color: #fff; font-size: 0.85rem; line-height: 1.35; }
.sys-node.is-out { align-content: start; background: #FBF8F4; }
.sys-node.is-out p { margin: 0; font-size: 0.78rem; line-height: 1.45; color: #3C2A1E; }
.sys-btn { justify-self: start; padding: 0.3rem 0.7rem; border-radius: 999px; background: #2A1C12; color: #fff; font-size: 0.72rem; font-weight: 600; }
.sys-p { margin: 0; font-size: 0.86rem; line-height: 1.55; color: var(--fg-2); }
.sys-note { margin: 0; font: 400 0.68rem/1.5 var(--mono); letter-spacing: 0.04em; color: var(--fg-3); }
.sys-more { padding-top: clamp(4rem, 7vw, 6rem); background: var(--bg-2); }
.sm-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: var(--gap); align-items: start; }
.sm-grid > * { min-width: 0; }
.df-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-top: 2rem; }
.dataflow { width: 100%; height: auto; overflow: visible; }
.df-box { fill: var(--bg-3); stroke: var(--line-2); }
.df-box.df-dark { fill: var(--fg); stroke: var(--fg); }
.df-box.df-ai { fill: var(--accent-soft); stroke: var(--accent); }
.df-t { font: 500 17px var(--display); fill: var(--fg); text-anchor: middle; }
.df-s { font: 400 12.5px var(--sans); fill: var(--fg-2); text-anchor: middle; }
.df-inv { fill: var(--bg); } .df-inv2 { fill: rgba(17,18,20,0.7); } .df-acc { fill: var(--accent-2); }
.df-line { fill: none; stroke: var(--fg-3); stroke-width: 1; stroke-dasharray: 3 5; }
.df-line.df-acc { stroke: var(--accent); fill: none; }
.df-dot { fill: var(--fg); } .df-dot.df-acc { fill: var(--accent); }
.df-k { font: 400 11px var(--mono); fill: var(--fg-3); text-anchor: middle; }
.df-hint { display: none; margin: 10px 0 0; font: 400 11px var(--mono); color: var(--fg-3); }
.tools { margin: 0; border-top: 1px solid var(--line); }
.tools div { display: grid; grid-template-columns: 6.5rem 1fr; gap: 0.75rem; padding: 0.7rem 0; border-bottom: 1px solid var(--line); }
.tools dt { font: 400 0.66rem/1.9 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.tools dd { margin: 0; line-height: 1.9; }
.tools code { font: 400 0.8rem var(--mono); color: var(--fg); }
.k-gap { margin-top: 2.5rem; }
.ladder { list-style: none; margin: 0; padding: 0; counter-reset: r; border-top: 1px solid var(--line); }
.ladder li { counter-increment: r; display: grid; grid-template-columns: 2rem 1fr; gap: 0.15rem 0.75rem; padding: 0.75rem 0; border-bottom: 1px solid var(--line); }
.ladder li::before { content: '0' counter(r); grid-row: span 2; font: 400 0.72rem/1.6 var(--mono); color: var(--fg-3); }
.ladder b { font: 500 0.98rem var(--display); color: var(--fg); }
.ladder span { font-size: 0.88rem; line-height: 1.5; color: var(--fg-2); }

/* ============================================================= 06 building */
.screens { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1rem, 2.5vw, 2rem); max-width: 1180px; margin: clamp(4rem, 8vw, 6rem) auto 0; padding-inline: var(--gutter); }
.scr { margin: 0; }
.scr img { width: 100%; border-radius: 28px; }
.scr-2 { margin-top: 4rem; }
.scr figcaption { margin-top: 1.1rem; padding-left: 0.9rem; border-left: 1px solid var(--line-2); font-size: 0.9rem; color: var(--fg-2); }
.scr figcaption span { display: block; margin-bottom: 0.3rem; font: 400 0.66rem var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3); }
.facts { margin-top: 3rem; }
.facts dd { font: 400 0.98rem/1.55 var(--sans); color: var(--fg-2); }
.facts .big { display: block; margin-bottom: 0.6rem; font: 400 clamp(3rem, 5.5vw, 5rem)/1 var(--display); letter-spacing: -0.05em; color: var(--fg); }
.who { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--gap); margin-top: clamp(3rem, 6vw, 4.5rem); }
.who p:not(.kicker) { margin: 0; font-size: 1.05rem; line-height: 1.6; color: var(--fg); }

/* ============================================================= 07 testing */
.ev-scope { max-width: 42rem; }
.metrics { margin-top: clamp(3rem, 6vw, 4.5rem); border-top: 1px solid var(--line); }
.m-row { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: var(--gap); align-items: center; padding: clamp(1.5rem, 3vw, 2.5rem) 0; border-bottom: 1px solid var(--line); }
.m-num { margin: 0; font: 400 clamp(4.5rem, 12vw, 10.5rem)/0.9 var(--display); letter-spacing: -0.06em; color: var(--fg); font-variant-numeric: tabular-nums; }
.m-num small { font-size: 0.32em; letter-spacing: -0.02em; color: var(--fg-3); }
.m-k { margin: 0 0 0.6rem; font: 500 0.78rem var(--display); letter-spacing: 0.04em; text-transform: uppercase; color: var(--fg-2); }
.m-txt > p:not(.m-k) { margin: 0; max-width: 30rem; font-size: 1rem; line-height: 1.6; color: var(--fg-2); }
.m-txt b { color: var(--fg); font-weight: 500; }
.vs-bars { display: grid; gap: 0.55rem; margin-top: 1.4rem; max-width: 30rem; }
.vs-bars div { display: grid; grid-template-columns: 6.6rem 1fr 2.6rem; gap: 0.9rem; align-items: center; font-size: 0.85rem; }
.vs-bars span { color: var(--fg-2); }
.vs-bars i { position: relative; height: 3px; background: var(--line-2); }
.vs-bars i::after { content: ''; position: absolute; inset: 0 auto 0 0; width: var(--w); background: var(--fg-3); }
.vs-bars div:first-child i::after { background: var(--accent); }
.vs-bars b { font: 400 0.76rem var(--mono); color: var(--fg); }
.fam-wrap { margin-top: clamp(3.5rem, 7vw, 5rem); max-width: 50rem; }
.families { display: grid; border-top: 1px solid var(--line); }
.fam { display: grid; grid-template-columns: 9rem 1fr 3rem; gap: 1rem; align-items: center; padding: 0.55rem 0; border-bottom: 1px solid var(--line); }
.fam-n { font-size: 0.92rem; color: var(--fg-2); }
.fam i { position: relative; height: 3px; background: var(--line); }
.fam i::after { content: ''; position: absolute; inset: 0 auto 0 0; width: var(--w); background: var(--fg-3); transition: background 0.3s; }
.fam b { font: 400 0.78rem var(--mono); color: var(--fg-2); text-align: right; }
.fam.is-on .fam-n { color: var(--fg); }
.fam.is-on i::after { background: var(--accent); }
.family-q { margin: 0.7rem 0 0; min-height: 1.6em; font-size: 0.92rem; color: var(--fg-2); }

/* ============================================================= 08 discoveries */
.discoveries { background: var(--bg-2); border-top: 1px solid var(--line); }
.disc { list-style: none; margin: clamp(2.5rem, 5vw, 3.5rem) 0 0; padding: 0; }
.disc li { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) minmax(0, 1fr); gap: 2rem; padding: 1.2rem 0; border-bottom: 1px solid var(--line); font-size: 0.98rem; line-height: 1.5; }
.disc li span:nth-child(1) { color: var(--fg-3); }
.disc li span:nth-child(2) { color: var(--fg); font: 500 1.05rem/1.45 var(--display); }
.disc li span:nth-child(3) { color: var(--accent-2); }
.disc li span:nth-child(3)::before { content: '\2192\00a0'; }
.disc .disc-h { padding-bottom: 0.8rem; border-bottom-color: var(--line-2); }
.disc .disc-h span { font: 400 0.66rem var(--mono) !important; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-3) !important; }
.disc .disc-h span:nth-child(3)::before { content: none; }

/* ============================================================= 09 learnings: calmer */
.learnings { padding-block: clamp(5rem, 9vw, 8rem); }
.learn { list-style: none; margin: 0; padding: 0; counter-reset: l; border-bottom: 1px solid var(--line); }
.learn li { counter-increment: l; display: grid; grid-template-columns: 3rem minmax(0, 1.15fr) minmax(0, 1fr); gap: 0 clamp(1.5rem, 4vw, 3.5rem); align-items: baseline; padding: clamp(1.2rem, 2.4vw, 1.75rem) 0; border-top: 1px solid var(--line); }
.learn li::before { content: '0' counter(l); font: 500 0.8rem var(--display); color: var(--accent); }
.learn h3 { margin: 0; font: 500 clamp(1.25rem, 1.9vw, 1.7rem)/1.2 var(--display); letter-spacing: -0.025em; color: var(--fg); text-wrap: balance; }
.learn p { margin: 0; max-width: 32rem; font-size: 0.98rem; line-height: 1.6; color: var(--fg-2); }
.finale { margin-top: clamp(3rem, 6vw, 4.5rem); }
.finale .h-sec { max-width: 24ch; }
.finale .body { margin-top: 1rem; }
.finale em { color: var(--accent); }

/* ============================================================= 10 final prototype: the opening's stage again */
.try { padding-bottom: clamp(4rem, 7vw, 6rem); }
.try-stage { margin: 0 clamp(0.75rem, 1.5vw, 1.25rem); padding-block: clamp(3rem, 7vw, 5.5rem); border: 1px solid var(--line); background: var(--bg-2); position: relative; overflow: hidden; }
.try-grid { height: auto; position: relative; z-index: 1; }
.try-grid .a-phone { grid-column: 2; transform: none; }
.try-grid .phone { height: 680px; }
.try-copy { grid-column: 1; grid-row: 1; }
.end { margin-top: clamp(4rem, 7vw, 6rem); }
.end-nav { display: flex; flex-wrap: wrap; gap: 1rem 3rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.foot { border-top: 1px solid var(--line); background: #0C0D0F; }
.foot-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 2rem; padding-block: 1.6rem; font: 400 0.68rem/1.6 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); }
.foot-in p { margin: 0; }
.foot-links { display: flex; gap: 1.5rem; padding-left: 1rem; border-left: 1px solid var(--fg-2); }
.foot-links a { color: var(--fg-2); }
.foot-links a:hover { color: var(--fg); }
/* touch targets: 44px on a phone for the bar's links and the footer's */
.foot-links a { display: inline-block; padding-block: 0.75rem; }
@media (max-width: 900px) { .bar .btn, .bar-menu { min-height: 2.75rem; } .bar-id { padding-block: 7px; } }

/* ============================================================= the phone
   The app's chat screen, matched to the recorded screens: warm gradient,
   orange user bubbles, white answer cards, the orange avatar. */
.phone { position: relative; width: min(340px, 100%); height: 640px; padding: 8px; border-radius: 48px; background: #FBF8F4; box-shadow: 0 0 0 1px rgba(0,0,0,0.07), 0 50px 90px -50px rgba(40, 20, 5, 0.55), 0 14px 28px -20px rgba(0,0,0,0.3); }
.ph-screen { position: relative; display: flex; flex-direction: column; height: 100%; border-radius: 40px; overflow: hidden; background: linear-gradient(180deg, #F1D3B4 0%, #F7E5D3 26%, #FBF3EA 62%, #FCF7F1 100%); color: #3C2A1E; font-family: var(--sans); }
.ph-status { display: flex; justify-content: space-between; align-items: center; padding: 15px 24px 2px; font-size: 12.5px; font-weight: 600; letter-spacing: -0.01em; color: #2A1C12; }
.ph-status i { width: 22px; height: 11px; border-radius: 3px; border: 1.5px solid currentColor; opacity: 0.65; }
.ph-bar { display: flex; gap: 11px; align-items: center; padding: 10px 18px 13px; border-bottom: 1px solid rgba(60, 42, 30, 0.09); }
.ph-back { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: rgba(255,255,255,0.65); font-size: 18px; color: #6A5240; }
.ph-bar b { display: block; font-size: 15.5px; font-weight: 650; letter-spacing: -0.015em; color: #2A1C12; }
.ph-bar em { display: block; margin-top: 1px; font-style: normal; font-size: 11.5px; color: rgba(60, 42, 30, 0.72); }
.ph-thread { flex: 1; overflow-y: auto; padding: 16px 14px 10px; scroll-behavior: smooth; overscroll-behavior: contain; scrollbar-width: none; }
.ph-thread::-webkit-scrollbar { display: none; }
.ph-form { display: flex; gap: 8px; margin: 8px 12px 14px; padding: 6px 6px 6px 16px; border-radius: 999px; background: #fff; box-shadow: 0 0 0 1px rgba(60,42,30,0.08), 0 8px 18px -12px rgba(60,42,30,0.35); }
.ph-input { flex: 1; min-width: 0; border: 0; background: transparent; font: inherit; font-size: 14px; color: #2A1C12; outline: none; }
.ph-form:has(.ph-input:focus-visible) { box-shadow: 0 0 0 2px var(--signal); }
.phone.is-show .ph-input { pointer-events: none; }
.ph-send { width: 34px; height: 34px; border: 0; border-radius: 50%; background: linear-gradient(160deg, #E58A3C, #CC6500); color: #fff; cursor: pointer; }
.ph-turn.ph-me { display: flex; justify-content: flex-end; margin: 12px 0 10px; }
.ph-turn.ph-me span { max-width: 80%; padding: 9px 14px; border-radius: 20px 20px 6px 20px; background: linear-gradient(160deg, #B85A00, #9A4A00); color: #fff; font-size: 14px; line-height: 1.4; box-shadow: 0 8px 16px -12px rgba(160, 78, 0, 0.8); animation: arrive 0.42s var(--ease) both; }
.dm-turn.dm-ai { display: flex; gap: 9px; align-items: flex-start; margin: 10px 0 12px; }
.dm-turn.ph-new { animation: arrive 0.5s var(--ease) both; }
@keyframes arrive { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.dm-av { flex: none; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: radial-gradient(circle at 34% 30%, #FFC88A, #E0782C 62%, #C96200); box-shadow: 0 5px 12px -5px rgba(201, 98, 0, 0.75); }
.dm-av svg { width: 14px; height: 14px; fill: #fff; }
.dm-bub { flex: 1; min-width: 0; padding: 13px 14px; border-radius: 6px 20px 20px 20px; background: rgba(255,255,255,0.95); box-shadow: 0 1px 2px rgba(60,42,30,0.05), 0 10px 22px -18px rgba(60,42,30,0.45); font-size: 13.5px; line-height: 1.47; color: #3C2A1E; }
.dm-bub > * + * { margin-top: 9px; }
.dm-p { margin: 0; }
.dm-head .dm-sec { margin: 0; font-weight: 650; font-size: 15px; letter-spacing: -0.012em; color: #2A1C12; }
.dm-head .dm-sec.is-qual { font-size: 13.5px; font-weight: 600; }
.dm-esub { margin: 3px 0 0; font-size: 12px; color: rgba(60,42,30,0.72); }
.dm-note { padding: 9px 11px; border-radius: 10px; background: #FFF6EC; box-shadow: inset 0 0 0 1px rgba(204,101,0,0.2); }
.dm-note.is-error { background: #FFF1EE; }
.dm-n-title { margin: 0; font-weight: 600; font-size: 12.5px; color: #8A3E12; }
.dm-n-body { margin: 2px 0 0; font-size: 12.5px; }
.dm-rows { display: grid; gap: 0; }
.dm-r-title { margin: 0 0 4px; font: 500 10.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: rgba(60,42,30,0.72); }
.dm-row { display: flex; justify-content: space-between; align-items: center; gap: 8px; width: 100%; padding: 8px 2px; border: 0; border-top: 1px solid rgba(60,42,30,0.08); background: none; text-align: left; cursor: default; }
button.dm-row { cursor: pointer; }
button.dm-row:hover { background: rgba(204,101,0,0.05); }
.dm-r-label { display: block; font-weight: 600; font-size: 13px; color: #2A1C12; }
.dm-r-value { display: block; font-size: 11.5px; color: rgba(60,42,30,0.72); }
.dm-chev { color: rgba(60,42,30,0.38); font-size: 18px; }
.dm-actions, .dm-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.dm-action { padding: 8px 13px; border: 0; border-radius: 999px; background: #2A1C12; color: #fff; font-size: 12px; font-weight: 600; cursor: pointer; }
.dm-chip { padding: 6px 11px; border: 1px solid rgba(160,78,0,0.26); border-radius: 999px; background: #fff; color: #8A4A12; font-size: 12px; font-weight: 600; cursor: pointer; text-align: left; }
.dm-chip:hover, .dm-action:hover { filter: brightness(1.06); }
.phone.is-show .dm-chip, .phone.is-show .dm-row, .phone.is-show .dm-action { pointer-events: none; }
.ph-typing .dm-bub { display: flex; gap: 5px; width: auto; flex: none; padding: 14px 16px; }
.ph-typing .dm-bub i { width: 6px; height: 6px; border-radius: 50%; background: rgba(60,42,30,0.42); animation: blink 1s infinite; }
.ph-typing .dm-bub i:nth-child(2) { animation-delay: 0.15s; } .ph-typing .dm-bub i:nth-child(3) { animation-delay: 0.3s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0.25; } 40% { opacity: 1; } }
.ph-shot img { border-radius: 12px; }
.ph-shot-note { margin: 8px 0 0 !important; font-size: 11.5px; color: rgba(60,42,30,0.72); }
.phone-cap { margin: 1.1rem 0 0; font: 500 0.68rem/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); text-align: center; }



/* ============================================================= black edition details */
.label, .kicker, .cols dt, .bar-id, .bar-nav a, .btn, .st-k, .scr figcaption span, .foot-in, .phone-cap, .tools dt { font-family: var(--display) !important; font-weight: 500 !important; letter-spacing: 0.04em !important; }
.bar { background: rgba(0, 0, 0, 0.72); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }
.bar-id b { border-radius: 50% 50% 50% 4px; background: var(--accent); color: #000; }
.bar-nav a { font-size: 0.82rem !important; color: var(--fg) !important; }
.bar-nav sup { margin-right: 0.25rem; font-size: 0.56rem; color: var(--fg-3); }
.btn { border-radius: var(--r); border-color: rgba(255, 255, 255, 0.5); font-size: 0.74rem !important; }
.btn-solid { background: transparent; border-color: rgba(255, 255, 255, 0.5); color: var(--fg); }
.cur { display: inline-block; width: 0.55em; height: 0.09em; margin-left: 0.06em; background: var(--accent); vertical-align: baseline; animation: caret 1.1s steps(1) infinite; }
.m-num small, .figs dd small, .facts .big small { color: var(--accent); }
.m-num small { font-size: 0.42em; letter-spacing: -0.03em; }
/* the light: soft blurred glows instead of lit surfaces */
.a-surface { background: radial-gradient(60% 70% at 70% 60%, rgba(255, 122, 26, 0.16), rgba(255, 122, 26, 0) 70%), var(--bg-2); }
.act-a .pin-stage::before { content: ''; position: absolute; inset: 0 0 auto auto; width: 60vw; height: 70vh; background: radial-gradient(closest-side, rgba(255, 122, 26, 0.10), rgba(255, 122, 26, 0)); filter: blur(30px); pointer-events: none; }
.try-stage { border-radius: var(--r-lg); background: radial-gradient(50% 70% at 75% 60%, rgba(255, 122, 26, 0.14), rgba(255, 122, 26, 0) 70%), var(--bg-2); }
.learnings, .discoveries { background: radial-gradient(60% 40% at 0% 0%, rgba(255, 122, 26, 0.06), rgba(255, 122, 26, 0) 70%); }
/* tool and method lists in the reference's // style */
.tools code::before { content: '// '; color: var(--fg-3); }
.tools code { display: inline-block; margin-right: 0.9rem; }
/* a process, as a stepper: one line of dots, filled as each step lights;
   the newest lit step glows in the project's colour */
.loop { list-style: none; margin: clamp(3rem, 6vw, 4.5rem) 0 0; padding: 0; display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); }
.loop li { position: relative; display: grid; align-content: start; gap: 0.35rem; min-width: 0; padding: 1.9rem 1.25rem 0 0; font: 500 clamp(1rem, 1.35vw, 1.2rem)/1.25 var(--display); letter-spacing: -0.015em; color: var(--fg-3); transition: color 0.4s; }
.loop li::before { content: ''; position: absolute; z-index: 1; top: 0; left: 0; width: 11px; height: 11px; border-radius: 50%; border: 1px solid var(--fg-3); background: var(--bg); transition: background 0.4s, border-color 0.4s, box-shadow 0.4s; }
.loop li::after { content: ''; position: absolute; top: 5px; left: 11px; right: 0; height: 1px; background: var(--line-2); transition: background 0.4s; }
.loop li:last-child::after { display: none; }
.loop li.is-lit { color: var(--fg); }
.loop li.is-lit::before { background: var(--fg); border-color: var(--fg); }
.loop li.is-lit::after { background: var(--fg-3); }
.loop li.is-lit:not(:has(+ li.is-lit))::before { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 12px var(--accent); }
.loop li b { font: inherit; color: inherit; }
.loop li small { font: 400 0.84rem/1.45 var(--sans); letter-spacing: 0; color: var(--fg-3); }
@media (max-width: 900px) {
  .loop { grid-auto-flow: row; }
  .loop li { padding: 0 0 1.4rem 1.9rem; }
  .loop li::after { top: 11px; left: 5px; right: auto; bottom: 0; width: 1px; height: auto; }
}

/* the scrolling band */
.band { overflow: hidden; padding-block: clamp(2rem, 5vw, 4rem); border-block: 1px solid var(--line); }
.band-track { display: flex; align-items: center; gap: clamp(1.5rem, 3vw, 3rem); width: max-content; animation: band 38s linear infinite; }
.band:hover .band-track { animation-play-state: paused; }
.band span { font: 500 clamp(3rem, 8vw, 7.5rem)/1 var(--display); letter-spacing: -0.045em; color: var(--fg); white-space: nowrap; }
.band i { flex: none; width: clamp(1.6rem, 4vw, 3.6rem); aspect-ratio: 1; border: 1px solid var(--fg-3); border-radius: 50%; background: repeating-linear-gradient(0deg, transparent 0 6px, rgba(255,255,255,0.18) 6px 7px), repeating-linear-gradient(90deg, transparent 0 6px, rgba(255,255,255,0.18) 6px 7px); }
@keyframes band { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .band-track, .cur { animation: none; } }

/* ============================================================= still layouts
   Narrow screens and reduced motion: each pinned sequence in its end state. */
.no-pin .pin { height: auto !important; --p: 1 !important; }
.no-pin .pin-stage { position: relative; height: auto; overflow: visible; padding-block: clamp(5rem, 10vw, 8rem); }
.no-pin .act-a .pin-stage { padding-top: calc(var(--bar) + 3rem); }
.no-pin .a-surface { display: none; }
.no-pin .a-grid { height: auto; row-gap: 4rem; align-items: start; }
.no-pin .a-hero { grid-column: 1; grid-row: 1; opacity: 1; transform: none; }
.no-pin .a-phone { grid-column: 2; grid-row: 1 / span 2; transform: none; }
.no-pin .a-built { grid-column: 1; grid-row: 2; opacity: 1; transform: none; }
.no-pin .c-old { display: block; margin: 0; text-align: center; font-size: 0.9rem; color: var(--fg-3); text-decoration: line-through; }
.no-pin .c-l0, .no-pin .c-n0 { display: none; }
.no-pin .c-l1, .no-pin .c-n1 { position: static; opacity: 1; }
.no-pin .c-steps::before { left: 12.5%; right: 12.5%; }
.no-pin .sys li { opacity: 1; --f: 1; }
/* not pinned: every step reads at full strength; the phone plays one on request */
.no-pin .story-steps li { min-height: 0; padding-block: 1.75rem; }
.no-pin .story-steps li h3 { color: var(--fg); }
.no-pin .story-steps li p:not(.st-k) { color: var(--fg-2); }
.no-pin .sys li .sys-node { border-color: var(--fg-2); }

@media (max-width: 1100px) {
  .story { grid-template-columns: 360px minmax(0, 1fr); gap: 3rem; }
  .sys { grid-template-columns: 1fr; gap: 0; max-width: 34rem; }
  .sys li { grid-template-rows: auto auto auto; padding: 0 0 1.75rem 1.5rem; border-left: 1px solid var(--line-2); }
  .sys li:last-child { border-left-color: transparent; }
  .sys-node::after { display: none; }
  .sys li::before { content: ''; position: absolute; left: -5px; top: 0; width: 9px; height: 9px; background: var(--fg); }
  .ba { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  :root { --bar: 58px; }
  .cols, .cols-3 { grid-template-columns: 1fr; gap: 1rem; }
  .no-pin .a-grid { grid-template-columns: 1fr; }
  .no-pin .a-hero, .no-pin .a-phone, .no-pin .a-built { grid-column: 1; grid-row: auto; }
  .pb-row, .story, .phr, .trust, .ba-wrap, .sm-grid, .who, .m-row, .try-grid { grid-template-columns: 1fr; }
  .figs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .story-stick { position: relative; top: 0; }
  .story-steps li { min-height: 0; padding-block: 1.75rem; }
  .cd-app { left: 50%; margin-left: -60px; }
  .cv { grid-template-columns: 1fr; gap: 1.5rem; }
  .cv-lines { display: none; }
  .cv-rec li { grid-template-columns: 1fr; gap: 0.25rem; }
  .cv-rec i { text-align: left; }
  .ba { grid-template-columns: 1fr; }
  .scope div { grid-template-columns: 1fr; gap: 0.2rem; }
  .screens { grid-template-columns: 1fr; max-width: 420px; }
  .scr-2 { margin-top: 0; }
  .disc li { grid-template-columns: 1fr; gap: 0.35rem; }
  .disc .disc-h { display: none; }
  .learn li { grid-template-columns: 2.2rem minmax(0, 1fr); row-gap: 0.5rem; }
  .learn p { grid-column: 2; }
  .try-grid .a-phone, .try-copy { grid-column: 1; grid-row: auto; }
  .try-grid .phone { height: 620px; }
}
@media (max-width: 760px) {
  .df-scroll .dataflow { min-width: 720px; }
  .df-hint { display: block; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cv-lines path.is-on, .c-typed::after { animation: none; }
  .df-dot { display: none; }
  .story-steps li, .story-steps li h3, .story-steps li p, .cd-app, .story-stick .phone { transition: none !important; }
  .ba-b, .dm-turn.ph-new, .ph-turn.ph-me span { animation: none !important; }
}
html:not(.js) .phone, html:not(.js) .cv, html:not(.js) .ba-switch, html:not(.js) .asks.is-auto, html:not(.js) .mini, html:not(.js) .story-src { display: none; }
html:not(.js) .ba-b.is-after { display: grid; }
html:not(.js) .story-steps li { opacity: 1; min-height: 0; padding-block: 1.5rem; }
html:not(.js) .pin { height: auto; --p: 1; }
html:not(.js) .pin-stage { position: relative; height: auto; }
.story > *, .phr > *, .trust > *, .pb-row > * { min-width: 0; }
.asks li:has(> button) { display: block; padding: 0; border: 0; }
/* very narrow: the figures stack as rows, label left and number right, at full label size */
@media (max-width: 400px) { .figs { grid-template-columns: minmax(0, 1fr); gap: 0.6rem; } .figs div { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; } .figs dd { margin: 0; font-size: 2.2rem; } }