/* Triadic base styles.
   Layout and components only. Every color, font, radius and type setting
   comes from a token, so a theme file in design/themes/ can restyle the page
   by overriding tokens plus a few signature rules. The default tokens below
   are a neutral fallback; every shipped theme overrides them. */

:root {
  --canvas: #faf9f6;
  --linen: #f1eee9;
  --stone: #d3cec6;
  --card: #ffffff;
  --hairline: #dedbd6;
  --ink: #111111;
  --iron: #414141;
  --graphite: #585858;
  --faint: #a8a39b;
  --accent: #1b3fc4;            /* the introduction edge */
  --label: var(--graphite);     /* mono caption color */
  --mark: rgba(17,17,17,.10);   /* highlighter under quoted phrases */
  --btn-bg: #000000;
  --btn-fg: #ffffff;
  --btn-hover: #222222;
  --ghost-border: transparent;
  --on-stone: var(--ink);       /* text on the triad band */

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: var(--font-sans);
  --font-quote: var(--font-sans);   /* the transcript and intro draft */
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --w-display: 300;
  --w-heading: 300;
  --w-body: 400;
  --display: clamp(40px, 7.2vw, 84px);
  --lh-display: 0.98;
  --track-display: -0.045em;
  --h2: clamp(32px, 4.4vw, 52px);
  --track-h2: -0.035em;
  --h3: clamp(24px, 2.6vw, 30px);
  --label-size: 12px;
  --label-track: 0.1em;
  --label-case: uppercase;

  --radius: 4px;          /* structural: inputs, small chips */
  --radius-btn: 4px;
  --radius-card: 4px;     /* panels and cards */
  --shadow-card: none;    /* only a few themes use one */
  --max: 1200px;
  --gap-section: clamp(64px, 9vw, 112px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: var(--w-body);
  font-size: 17px;
  line-height: 1.55;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-display); font-weight: var(--w-heading); margin: 0; text-wrap: balance; }
p { margin: 0; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: max(24px, env(safe-area-inset-left, 0px));
  padding-right: max(24px, env(safe-area-inset-right, 0px));
}
@media (max-width: 640px) {
  .wrap { padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
}
.band { padding-block: var(--gap-section); position: relative; }
.band.linen { background: var(--linen); }
.band.stone { background: var(--stone); color: var(--on-stone); }

.label {
  font-family: var(--font-mono);
  font-size: var(--label-size);
  letter-spacing: var(--label-track);
  text-transform: var(--label-case);
  color: var(--label);
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: 500 15px/1 var(--font-sans);
  padding: 15px 20px; min-height: 46px;
  border-radius: var(--radius-btn); border: 1px solid transparent;
  text-decoration: none; cursor: pointer;
  transition: background-color 120ms, color 120ms, border-color 120ms;
}
.btn-primary { background: var(--btn-bg); color: var(--btn-fg); }
.btn-primary:hover { background: var(--btn-hover); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--ghost-border); }
.btn-ghost:hover { background: var(--linen); }

/* Nav */
.nav {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: color-mix(in srgb, var(--canvas) 90%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.nav .wrap { display: flex; align-items: center; gap: 32px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.brand svg { width: 30px; height: 30px; }
.brand span { font-family: var(--font-sans); font-size: 22px; font-weight: 500; letter-spacing: -0.035em; }
.nav-links { display: flex; gap: 4px; margin-left: 8px; }
.nav-links a { font-size: 15px; color: var(--iron); text-decoration: none; padding: 10px 12px; border-radius: var(--radius-btn); }
.nav-links a:hover { background: var(--linen); color: var(--ink); }
.nav .btn { margin-left: auto; padding: 12px 16px; min-height: 44px; }
@media (max-width: 760px) { .nav-links { display: none; } }

/* Hero */
.hero { padding-block: clamp(48px, 7vw, 96px) clamp(56px, 7vw, 88px); position: relative; overflow: hidden; }
.hero > .wrap { position: relative; }
.hero > .wrap > .label { display: block; margin-bottom: 28px; }
.hero h1 {
  font-size: var(--display);
  font-weight: var(--w-display);
  line-height: var(--lh-display);
  letter-spacing: var(--track-display);
  max-width: 22ch;
}
.hero h1 span { display: block; }
.hero-row { display: grid; grid-template-columns: minmax(0, 560px); gap: 28px; margin-top: 32px; }
.hero-row p { color: var(--iron); font-size: 19px; line-height: 1.5; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
p { text-wrap: pretty; }

/* The annotated note */
.note {
  margin: clamp(48px, 6vw, 72px) 0 0;
  background: var(--linen);
  border-radius: var(--radius-card);
  padding: clamp(20px, 3vw, 40px);
  box-shadow: var(--shadow-card);
}
.note-head { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; padding-bottom: 20px; }
.play {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--btn-bg); display: grid; place-items: center; flex: none;
}
.play::after {
  content: ""; width: 0; height: 0; margin-left: 3px;
  border-left: 10px solid var(--btn-fg); border-top: 6px solid transparent; border-bottom: 6px solid transparent;
}
.wave { display: flex; align-items: center; gap: 2px; height: 28px; flex: 1 1 180px; min-width: 0; overflow: hidden; }
.wave i { display: block; width: 3px; flex: none; border-radius: 1px; background: var(--ink); opacity: .75; }
.wave i.rest { opacity: .22; }
.note-body { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.transcript {
  background: var(--card); border-radius: var(--radius-card);
  padding: clamp(20px, 2.6vw, 32px);
  font-family: var(--font-quote);
  font-size: clamp(19px, 1.9vw, 24px); line-height: 1.5; font-weight: 400;
  letter-spacing: -0.012em;
}
.transcript mark { background: linear-gradient(transparent 58%, var(--mark) 58%); color: inherit; padding: 0 1px; }
.transcript sup, .margin sup {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  color: var(--graphite); margin-left: 2px; vertical-align: 0.7em; line-height: 0;
}
.margin { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.margin li { background: var(--canvas); border-radius: var(--radius-card); padding: 14px 16px; display: grid; gap: 4px; }
.margin .kind { display: flex; align-items: center; gap: 6px; }
.margin .kind sup { margin: 0; vertical-align: 0; }
.margin strong { font-weight: 400; font-size: 17px; line-height: 1.35; }
.note-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding-top: 20px; }
@media (max-width: 820px) { .note-body { grid-template-columns: 1fr; } }

.facts { display: flex; flex-wrap: wrap; gap: 10px 36px; margin-top: 40px; }
.facts span::before { content: "+ "; color: var(--faint); }

/* Section heads */
.head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 400px); gap: 24px 64px; align-items: end; margin-bottom: clamp(40px, 5vw, 64px); }
.head h2, .why-text h2, .reason h2, .join-copy h2 { font-size: var(--h2); line-height: 1.04; letter-spacing: var(--track-h2); }
.head h2 { max-width: 18ch; }
.head p { color: var(--iron); }
.head .label { grid-column: 1 / -1; }
@media (max-width: 820px) { .head { grid-template-columns: 1fr; } }

/* Inside the app: real screens from the simulator in a simple device frame.
   Themes restyle the row through --bezel, --phone-shadow and the .phones layout. */
.showcase { --bezel: 6px; --bezel-color: #0d0d0d; --phone-shadow: 0 24px 60px -24px rgba(0,0,0,.35); overflow: hidden; }
.phones { display: flex; justify-content: center; align-items: flex-start; gap: clamp(12px, 2vw, 28px); }
.phone { --pw: clamp(150px, 17vw, 216px); width: var(--pw); flex: none; margin: 0; display: grid; gap: 14px; justify-items: center; text-align: center; }
.phone .frame {
  position: relative; display: block; width: 100%;
  padding: var(--bezel); background: var(--bezel-color);
  border-radius: calc(var(--pw) * .155); box-shadow: var(--phone-shadow);
}
.phone .frame::after {
  content: ""; position: absolute; left: 50%; transform: translateX(-50%);
  top: calc(var(--bezel) + var(--pw) * .028); width: 29%; height: calc(var(--pw) * .082);
  background: #000; border-radius: 99px;
}
.phone img { display: block; width: 100%; height: auto; border-radius: calc(var(--pw) * .13); }
.phone figcaption { display: grid; gap: 4px; max-width: 22ch; font-size: 15px; line-height: 1.35; color: var(--iron); }
.phone.hero-phone { --pw: clamp(170px, 20vw, 252px); }
@media (max-width: 900px) {
  .phones { justify-content: flex-start; overflow-x: auto; scroll-snap-type: x mandatory; padding: 4px 16px 24px; margin-inline: -16px; scrollbar-width: none; }
  .phones::-webkit-scrollbar { display: none; }
  .phone, .phone.hero-phone { --pw: 200px; scroll-snap-align: center; }
  .phone.hero-phone { order: -1; }
}

/* The problem: three moments where intros get lost */
.pains { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.pains li {
  background: var(--card); border-radius: var(--radius-card); box-shadow: var(--shadow-card);
  padding: 22px 22px 26px; display: grid; gap: 28px; align-content: space-between;
}
.pains p { font-size: 19px; line-height: 1.4; letter-spacing: -0.012em; }
@media (max-width: 1000px) { .pains { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .pains { grid-template-columns: 1fr; } .pains li { gap: 14px; } }

/* Why connect people: hub versus triangle */
.why { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 40px 64px; align-items: start; }
.why-text { display: grid; gap: 18px; max-width: 460px; }
.why-text p { color: var(--iron); }
.shapes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.shape { background: var(--card); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: 20px; display: grid; gap: 14px; align-content: start; min-width: 0; }
.shape svg { width: 100%; height: auto; max-width: 100%; display: block; }
.shape p { font-size: 15px; color: var(--iron); }
.shape .sp { stroke: var(--ink); stroke-opacity: .35; stroke-width: 1.4; }
.shape .tie { stroke: var(--ink); stroke-width: 2; }
.shape .bridge { stroke: var(--accent); stroke-width: 2.6; stroke-linecap: round; }
.shape .n { fill: var(--card); stroke: var(--ink); stroke-width: 1.4; }
.shape .me { fill: var(--ink); }
.gets { list-style: none; margin: clamp(32px, 4vw, 48px) 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.gets li { display: grid; gap: 8px; padding: 20px 0 0; box-shadow: 0 -1px 0 var(--hairline); }
.gets h3 { font-size: var(--h3); line-height: 1.2; letter-spacing: -0.02em; }
.gets p { color: var(--iron); max-width: 44ch; }
.honest {
  margin-top: clamp(40px, 5vw, 64px); padding: clamp(20px, 3vw, 32px);
  background: var(--card); border-radius: var(--radius-card); box-shadow: var(--shadow-card);
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 12px 32px; align-items: baseline;
}
.honest p { font-size: clamp(19px, 1.8vw, 22px); line-height: 1.45; max-width: 62ch; }
@media (max-width: 900px) { .why { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .gets, .honest { grid-template-columns: 1fr; } }
@media (max-width: 480px) { .shapes { grid-template-columns: 1fr; } }

/* Moments: the timeline of one conversation */
.moments { display: grid; gap: clamp(56px, 7vw, 96px); }
.moment { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 32px 64px; align-items: center; }
.moment:nth-child(even) .moment-text { order: 2; }
.moment-text { display: grid; gap: 16px; max-width: 440px; }
.moment-text h3 { font-size: var(--h3); line-height: 1.2; letter-spacing: -0.02em; }
.moment-text p { color: var(--iron); }
.when { display: flex; align-items: baseline; gap: 12px; }
.when b { font-family: var(--font-mono); font-weight: 500; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink); }
.when b::before { content: attr(data-n) "  "; color: var(--faint); white-space: pre; }
.panel { background: var(--linen); border-radius: var(--radius-card); padding: clamp(20px, 3vw, 36px); min-width: 0; }
@media (max-width: 820px) {
  .moment { grid-template-columns: 1fr; }
  .moment:nth-child(even) .moment-text { order: 0; }
}

.qcards { display: grid; gap: 10px; }
.qcard { background: var(--card); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: 18px 20px; display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: baseline; }
.qcard span:last-child { font-size: 19px; line-height: 1.35; }

.capture { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.rec { background: var(--card); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: 18px 20px; display: flex; align-items: center; gap: 16px; }
.rec .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--ink); flex: none; }
.rec .wave { height: 24px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: var(--card); border-radius: var(--radius); padding: 8px 12px; font-size: 15px; display: inline-flex; gap: 8px; align-items: baseline; }
.chip .label { font-size: 11px; }

.brief { background: var(--card); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: clamp(20px, 2.6vw, 28px); display: grid; gap: 14px; }
.brief p { font-family: var(--font-quote); font-size: 18px; line-height: 1.5; }
.brief .cites { display: flex; flex-wrap: wrap; gap: 8px; }
.brief .cites span { font-family: var(--font-mono); font-size: 12px; color: var(--graphite); border: 1px solid var(--hairline); border-radius: var(--radius); padding: 4px 8px; }

/* Triad: the one bold moment */
.triad-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 40px 64px; align-items: center; }
.triad-svg { width: 100%; height: auto; max-width: 100%; display: block; }
.triad-svg .spoke { stroke: var(--on-stone); stroke-opacity: .28; stroke-width: 1.2; }
.triad-svg .known { stroke: var(--on-stone); stroke-width: 2.2; }
.triad-svg .intro { stroke: var(--accent); stroke-width: 3; stroke-linecap: round; }
.triad-svg .node { fill: var(--stone); stroke: var(--on-stone); stroke-width: 1.2; }
.triad-svg .node.dim { stroke-opacity: .45; }
.triad-svg .node.hot { fill: var(--on-stone); }
.triad-svg .you { fill: var(--on-stone); }
.triad-svg text { font-family: var(--font-mono); font-size: 12px; fill: var(--on-stone); letter-spacing: .04em; }
.triad-svg text.inv { fill: var(--stone); }
.triad-svg text.dim { fill: var(--on-stone); fill-opacity: .6; }
.reason { display: grid; gap: 20px; }
.reason p { color: inherit; opacity: .82; }
.reason .when b { color: inherit; }
.reason dl { margin: 0; display: grid; gap: 2px; }
.reason dl div { background: var(--canvas); color: var(--ink); padding: 14px 16px; display: grid; grid-template-columns: 72px 1fr; gap: 12px; }
.reason dl div:first-child { border-radius: var(--radius-card) var(--radius-card) 0 0; }
.reason dl div:last-child { border-radius: 0 0 var(--radius-card) var(--radius-card); }
.reason dt { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--graphite); padding-top: 3px; }
.reason dd { margin: 0; }
@media (max-width: 900px) { .triad-grid { grid-template-columns: 1fr; } }

/* Data sheet */
.sheet-scroll { overflow-x: auto; }
.sheet { width: 100%; min-width: 640px; border-collapse: separate; border-spacing: 0 2px; font-size: 16px; }
.sheet th { text-align: left; font-family: var(--font-mono); font-weight: 400; font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--graphite); padding: 0 20px 10px; }
.sheet td { background: var(--card); padding: 18px 20px; vertical-align: top; }
.sheet td:first-child { border-radius: var(--radius-card) 0 0 var(--radius-card); width: 22%; }
.sheet td:last-child { border-radius: 0 var(--radius-card) var(--radius-card) 0; width: 30%; }
.sheet td:nth-child(2) { color: var(--iron); }
.never { font-family: var(--font-mono); font-size: 13px; letter-spacing: .06em; text-transform: uppercase; }
.sheet-note { margin-top: 24px; color: var(--graphite); font-size: 15px; max-width: 70ch; }
@media (max-width: 640px) {
  .sheet { min-width: 0; display: block; }
  .sheet thead { display: none; }
  .sheet tbody { display: grid; gap: 8px; }
  .sheet tr { display: grid; background: var(--card); border-radius: var(--radius-card); padding: 18px 20px; gap: 12px; }
  .sheet td, .sheet td:first-child, .sheet td:last-child { width: auto; padding: 0; border-radius: 0; background: none; }
  .sheet td:first-child { font-size: 18px; }
  .sheet td:nth-child(2)::before, .sheet td:nth-child(3)::before {
    display: block; margin-bottom: 4px;
    font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--graphite);
  }
  .sheet td:nth-child(2)::before { content: "Where it lives"; }
  .sheet td:nth-child(3)::before { content: "Leaves your phone"; }
}

/* Is this you: situations, not job titles */
.fit { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.fit li { background: var(--linen); border-radius: var(--radius-card); padding: clamp(20px, 2.6vw, 28px); display: grid; gap: 10px; align-content: start; }
.fit p { font-size: 19px; line-height: 1.4; letter-spacing: -0.01em; }
@media (max-width: 760px) { .fit { grid-template-columns: 1fr; } }

/* Waitlist */
.join-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 560px); gap: 48px 80px; align-items: start; }
.join-copy { display: grid; gap: 20px; position: sticky; top: 100px; }
.join-copy p { color: var(--iron); max-width: 40ch; }
@media (max-width: 900px) { .join-grid { grid-template-columns: 1fr; } .join-copy { position: static; } }

[hidden] { display: none !important; }
form { display: grid; gap: 20px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 560px) { .row2 { grid-template-columns: 1fr; } }
.field { display: grid; gap: 8px; min-width: 0; }
.field label, fieldset legend { font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--graphite); }
.field label em, legend em { font-style: normal; text-transform: none; letter-spacing: 0; color: var(--graphite); opacity: .85; }
input[type="text"], input[type="email"], select, textarea {
  width: 100%; font: 400 16px/1.4 var(--font-sans); color: var(--ink);
  background: var(--card); border: 1px solid var(--hairline); border-radius: var(--radius);
  padding: 13px 16px; min-height: 48px; appearance: none; -webkit-appearance: none;
}
select {
  background-image: linear-gradient(45deg, transparent 50%, var(--graphite) 50%), linear-gradient(135deg, var(--graphite) 50%, transparent 50%);
  background-position: calc(100% - 20px) 21px, calc(100% - 15px) 21px; background-size: 5px 5px; background-repeat: no-repeat;
  padding-right: 40px;
}
textarea { min-height: 104px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--ink); outline: 2px solid var(--ink); outline-offset: 2px; }
fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: 8px; min-width: 0; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.seg span {
  display: inline-flex; align-items: center; min-height: 44px; padding: 10px 14px;
  background: var(--card); border: 1px solid var(--hairline); border-radius: var(--radius-btn);
  font-size: 15px; cursor: pointer; transition: background-color 120ms, color 120ms;
}
.seg input:checked + span { background: var(--btn-bg); color: var(--btn-fg); border-color: var(--btn-bg); }
.seg input:focus-visible + span { outline: 2px solid var(--ink); outline-offset: 2px; }
.check { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: start; font-size: 15px; color: var(--iron); }
.check input { width: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--btn-bg); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.err { font-size: 14px; color: var(--ink); padding-left: 10px; box-shadow: inset 2px 0 0 var(--accent); }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }
.form-foot small { color: var(--graphite); font-size: 14px; }
.done { background: var(--card); border-radius: var(--radius-card); padding: 32px; display: grid; gap: 12px; }
.done h3 { font-size: var(--h3); letter-spacing: -0.02em; }
.done p { color: var(--iron); }

/* Footer */
footer { padding-block: 56px 40px; }
.foot { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 32px; align-items: end; }
.foot p { color: var(--graphite); font-size: 15px; max-width: 46ch; margin-top: 16px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.foot nav a { color: var(--iron); text-decoration: none; font-size: 15px; padding: 8px 0; }
.foot nav a:hover { color: var(--ink); text-decoration: underline; }
.legal { margin-top: 40px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; }
@media (max-width: 640px) { .foot { grid-template-columns: 1fr; } }

/* Motion. These rules only apply once the script adds .anim to <html>, so the
   page reads complete without JavaScript and with reduced motion. */
:root { --ease: cubic-bezier(.2, .7, .2, 1); --pop: cubic-bezier(.3, 1.45, .5, 1); }

.anim [data-draw] {
  stroke-dasharray: var(--len); stroke-dashoffset: var(--len); visibility: hidden;
  transition: stroke-dashoffset var(--dur, .8s) var(--ease) var(--d, 0s), visibility 0s var(--d, 0s);
}
.anim .go [data-draw] { stroke-dashoffset: 0; visibility: visible; }
.anim [data-p] {
  opacity: 0; transform: scale(.3); transform-box: fill-box; transform-origin: center;
  transition: opacity .4s var(--ease) var(--d, 0s), transform .7s var(--pop) var(--d, 0s);
}
.anim .go [data-p] { opacity: 1; transform: none; }
.shape .pkt { fill: var(--ink); }
.shape .pkt.blue { fill: var(--accent); }

/* Reveal: blocks rise in once as they enter the viewport */
.anim [data-rise] { opacity: 0; transform: translateY(14px); transition: opacity .7s var(--ease) var(--d, 0s), transform .7s var(--ease) var(--d, 0s); }
.anim [data-rise].in { opacity: 1; transform: none; }

.anim .play { cursor: pointer; transition: transform .2s var(--ease); }
.anim .play:hover { transform: scale(1.08); }
.play.playing { animation: ring 1.6s ease-out infinite; }
.play.playing::after {
  width: 10px; height: 12px; margin-left: 0; border: 0;
  border-left: 3px solid var(--btn-fg); border-right: 3px solid var(--btn-fg);
}
@keyframes ring {
  from { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ink) 30%, transparent); }
  to { box-shadow: 0 0 0 12px color-mix(in srgb, var(--ink) 0%, transparent); }
}
.anim .wave i { transition: opacity .3s, transform .3s var(--ease); transform-origin: center; }
.anim .wave i.head { opacity: 1; transform: scaleY(1.45); }
.anim .rec .dot { cursor: pointer; }
.anim .rec.rec-on .dot { animation: blink 1.1s ease-in-out infinite; }
@keyframes blink { 50% { opacity: .2; } }
.anim .transcript mark { background-repeat: no-repeat; background-size: 0% 100%; transition: background-size 1s var(--ease); }
.anim .transcript mark.lit { background-size: 100% 100%; }
.anim .transcript sup { opacity: 0; transition: opacity .4s .6s; }
.anim .transcript sup.lit { opacity: 1; }

.triad-svg .ring { fill: none; stroke: var(--accent); stroke-width: 1.5; opacity: 0; transform-box: fill-box; transform-origin: center; }
.anim .triad-svg.go .ring { animation: halo 2.8s ease-out var(--rd, .6s) infinite; }
@keyframes halo { 0% { opacity: .75; transform: scale(1); } 100% { opacity: 0; transform: scale(1.9); } }
.anim .triad-svg:not(.live) .ring { animation-play-state: paused; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}