@font-face { font-family: "Bricolage"; src: url("fonts/bricolage.woff2") format("woff2"); font-weight: 200 800; font-display: swap; }
@font-face { font-family: "Instrument"; src: url("fonts/instrument.woff2") format("woff2"); font-weight: 400 700; font-display: swap; }

:root {
  --paper: #eef0fa;
  --sheet: #fbfbff;
  --ink: #17183b;
  --soft: #4e5176;
  --line: #d3d6ea;
  --bar: #3438c9;
  --bar-soft: #a9acec;
  --track: #e0e2f3;
  --mark: #ffe44d;
  --on-mark: #17183b;
  --s1: #e4e5f8; --s2: #bcbff0; --s3: #8488e4; --s4: #4f53d4; --s5: #2a2da3;
  --glide: 280ms cubic-bezier(.22, .8, .24, 1);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #12132e;
    --sheet: #1a1b3d;
    --ink: #eeeffa;
    --soft: #a8abcc;
    --line: #34365f;
    --bar: #8e92ff;
    --bar-soft: #4b4e92;
    --track: #2a2c57;
    --s1: #24264f; --s2: #3a3d80; --s3: #565ab8; --s4: #8387ea; --s5: #bcbfff;
  }
}
:root[data-theme="dark"] {
  --paper: #12132e; --sheet: #1a1b3d; --ink: #eeeffa; --soft: #a8abcc; --line: #34365f; --bar: #8e92ff; --bar-soft: #4b4e92; --track: #2a2c57;
  --s1: #24264f; --s2: #3a3d80; --s3: #565ab8; --s4: #8387ea; --s5: #bcbfff;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.55 "Instrument", system-ui, sans-serif; }
html { scroll-padding-top: 70px; }
main { max-width: 860px; margin: 0 auto; padding: 0 16px; }
section { padding: 56px 0; border-top: 1.5px solid var(--line); }
section.hero { border-top: 0; padding-top: 30px; }

/* The navbar: a highlighter that slides between sections */
.nav { position: sticky; top: 0; z-index: 5; background: var(--paper); border-bottom: 1.5px solid var(--ink); }
.nav-in { display: flex; align-items: center; justify-content: space-between; gap: 20px; max-width: 860px; margin: 0 auto; padding: 8px 16px; }
.nav-brand { display: none; font: 800 18px "Bricolage", sans-serif; letter-spacing: -0.01em; text-decoration: none; white-space: nowrap; }
.nav-links { position: relative; display: flex; flex: 1; justify-content: space-between; gap: 2px; }
.nav-links a { position: relative; z-index: 1; padding: 7px 9px; font: 600 14.5px/1.2 "Instrument", sans-serif; text-decoration: none; white-space: nowrap; color: var(--soft); transition: color 200ms ease-out; }
.nav-links a:hover { color: var(--ink); }
.nav-links a[aria-current] { color: var(--on-mark); }
.nav-mark { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--mark); border-radius: 4px; transition: transform 320ms cubic-bezier(.22, .8, .24, 1), width 320ms cubic-bezier(.22, .8, .24, 1); }
h1, h2, h3 { font-family: "Bricolage", system-ui, sans-serif; line-height: 1.05; margin: 0; }
h1 { font-size: clamp(42px, 10.5vw, 84px); font-weight: 800; letter-spacing: -0.03em; max-width: 13ch; }
h2 { font-size: clamp(30px, 6.5vw, 46px); font-weight: 750; letter-spacing: -0.02em; max-width: 18ch; margin-bottom: 14px; }
h3 { font-size: 20px; font-weight: 700; margin: 30px 0 10px; }
p { margin: 0 0 14px; max-width: 62ch; }
a { color: inherit; text-underline-offset: 3px; }
figure { margin: 0; }
:focus-visible { outline: 3px solid var(--bar); outline-offset: 2px; }
[hidden] { display: none !important; }

.lede { font-size: 19px; color: var(--soft); margin-top: 16px; }
.note { font-size: 14.5px; color: var(--soft); margin-top: 14px; }
.soft { color: var(--soft); }
.callout { margin-top: 22px; padding: 14px 16px; background: var(--sheet); border: 1.5px solid var(--line); border-radius: 6px; max-width: none; }

/* The lever */
.ruler { margin-top: 30px; background: var(--sheet); border: 1.5px solid var(--ink); border-radius: 6px; padding: 12px 14px 8px; }
.ruler label { display: block; font-weight: 600; font-size: 15px; margin-bottom: 8px; }
.slide { position: relative; height: 46px; margin: 0 17px; }
.track { position: absolute; left: -17px; right: -17px; top: 14px; height: 18px; background: var(--track); border-radius: 2px; }
.track::before { content: ""; position: absolute; inset: 0 17px; background: repeating-linear-gradient(90deg, var(--ink) 0 1.5px, transparent 1.5px 10%); }
.thumb { position: absolute; top: 2px; left: 20%; width: 34px; height: 42px; margin-left: -17px; background: var(--mark); border: 2px solid var(--on-mark); border-radius: 5px; transition: left var(--glide); pointer-events: none; }
#years { -webkit-appearance: none; appearance: none; position: absolute; inset: 0 -17px; width: calc(100% + 34px); height: 46px; margin: 0; background: transparent; opacity: 0; cursor: grab; touch-action: pan-y; }
#years::-webkit-slider-thumb { -webkit-appearance: none; width: 34px; height: 46px; }
#years::-moz-range-thumb { width: 34px; height: 46px; border: 0; }
#years:active { cursor: grabbing; }
.slide:has(#years:focus-visible) .thumb { outline: 3px solid var(--bar); outline-offset: 2px; }
.ticks { display: flex; justify-content: space-between; font: 600 13px/1 "Instrument", sans-serif; color: var(--soft); padding: 2px 9px 2px; font-variant-numeric: tabular-nums; }

.readout { font-family: "Bricolage", sans-serif; font-weight: 700; font-size: clamp(25px, 5.4vw, 36px); line-height: 1.15; margin: 26px 0 16px; max-width: 24ch; letter-spacing: -0.01em; }
.readout mark { background: var(--mark); color: var(--on-mark); padding: 0 6px; font-variant-numeric: tabular-nums; }

/* The curve */
.curve { margin: 4px 0 18px; }
.curve svg { display: block; width: 100%; height: auto; overflow: visible; }
.curve figcaption { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: 14px; color: var(--soft); margin-top: 6px; }
.gridline { stroke: var(--line); stroke-width: 1; }
.axis { fill: var(--soft); font: 500 12.5px "Instrument", sans-serif; }
.line-all { stroke: var(--soft); stroke-width: 1.5; stroke-dasharray: 4 4; }
.line-area { stroke: var(--bar); stroke-width: 2.5; stroke-linecap: round; }
.dot { transition: transform var(--glide); }
.dot circle { fill: var(--mark); stroke: var(--on-mark); stroke-width: 2; }

/* Bars */
.row { display: block; width: 100%; background: none; border: 0; color: inherit; font: inherit; text-align: left; padding: 7px 0; cursor: default; }
button.row { cursor: pointer; }
.row-top { display: flex; justify-content: space-between; gap: 12px; font-size: 15.5px; margin-bottom: 4px; }
.row-top b { font-weight: 600; }
.row-top span { color: var(--soft); font-variant-numeric: tabular-nums; white-space: nowrap; }
.bar { position: relative; display: flex; gap: 2px; height: 14px; background: var(--track); border-radius: 2px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: var(--bar); border-radius: 0 3px 3px 0; transition: width var(--glide); }
.bar i.plus { background: var(--bar-soft); }
button.row[aria-pressed="true"] .row-top b { background: var(--mark); color: var(--on-mark); padding: 0 4px; margin-left: -4px; }

/* The grid */
.grid-wrap { overflow-x: auto; margin: 18px 0 8px; }
.grid { width: 100%; border-collapse: separate; border-spacing: 2px; font-size: 13px; }
.grid th { font-weight: 600; text-align: left; white-space: nowrap; padding-right: 8px; }
.grid thead th { height: 128px; padding: 0; vertical-align: bottom; }
.grid thead th span { display: inline-block; writing-mode: vertical-rl; transform: rotate(180deg); font-weight: 500; color: var(--soft); white-space: nowrap; }
.grid td { padding: 0; }
.grid td button { display: block; width: 100%; min-width: 28px; height: 30px; border: 0; border-radius: 3px; cursor: pointer; transition: transform 160ms ease-out; }
.grid td button:hover { transform: scale(1.08); }
.grid td button[aria-pressed="true"] { outline: 2.5px solid var(--ink); outline-offset: 1px; }
.l0 { background: var(--track); } .l1 { background: var(--s1); } .l2 { background: var(--s2); } .l3 { background: var(--s3); } .l4 { background: var(--s4); } .l5 { background: var(--s5); }
.detail { background: var(--sheet); border: 1.5px solid var(--line); border-radius: 6px; padding: 12px 14px; margin: 10px 0 18px; }
.detail p, .callout { max-width: none; }
.detail p:last-child { margin-bottom: 0; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 14px 0 6px; }
.chips button { font: 500 14.5px/1.2 "Instrument", sans-serif; padding: 8px 11px; min-height: 36px; color: inherit; background: transparent; border: 1.5px solid var(--line); border-radius: 4px; cursor: pointer; transition: background 180ms ease-out, color 180ms ease-out, border-color 180ms ease-out; }
.chips button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }

/* Rings */
.rings { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin: 22px 0 4px; }
.ring { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 8px; background: var(--sheet); border: 1.5px solid var(--line); border-radius: 6px; padding: 14px 8px; }
.ring-art { position: relative; width: 84px; height: 84px; }
.ring-art b { position: absolute; inset: 0; display: grid; place-items: center; font: 700 18px "Bricolage", sans-serif; }
.ring svg { display: block; transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 9; }
.ring-off { stroke: var(--track); }
.ring-on { stroke: var(--bar); stroke-linecap: butt; transition: stroke-dashoffset 520ms cubic-bezier(.22, .8, .24, 1); }
.ring p { margin: 0; font-weight: 600; font-size: 15px; line-height: 1.25; }
.ring small { display: block; margin-top: 3px; color: var(--soft); font-weight: 400; font-size: 13.5px; }

/* The AI tasks open and close like an accordion */
.uses { display: grid; gap: 8px; margin-top: 12px; }
.use { border: 1.5px solid var(--line); border-radius: 6px; background: var(--sheet); transition: border-color 200ms ease-out; }
.use:hover, .use.open { border-color: var(--ink); }
.use-head { position: relative; display: block; width: 100%; padding: 12px 42px 12px 14px; background: none; border: 0; color: inherit; font: inherit; text-align: left; cursor: pointer; }
.use-sign { position: absolute; right: 14px; top: 13px; width: 18px; height: 18px; }
.use-sign::before, .use-sign::after { content: ""; position: absolute; left: 2px; right: 2px; top: 8px; height: 2.5px; background: var(--ink); border-radius: 1px; transition: transform 260ms cubic-bezier(.22, .8, .24, 1); }
.use-sign::after { transform: rotate(90deg); }
.use.open .use-sign::after { transform: rotate(0deg); }
.use.open .row-top b { background: var(--mark); color: var(--on-mark); padding: 0 4px; margin-left: -4px; }
.use-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows 320ms cubic-bezier(.22, .8, .24, 1); }
.use.open .use-body { grid-template-rows: 1fr; }
.use-inner { overflow: hidden; min-height: 0; padding: 0 14px; visibility: hidden; transition: visibility 0ms 320ms; }
.use.open .use-inner { visibility: visible; transition-delay: 0ms; }
.use-inner p { max-width: none; }
.use-inner p:first-child { margin-top: 2px; }
.use-inner strong { background: var(--mark); color: var(--on-mark); padding: 0 4px; font-weight: 600; }

.split { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0 44px; }
.legend { display: flex; align-items: center; gap: 6px; font-size: 14px; color: var(--soft); margin-bottom: 6px; }
.key { display: inline-block; width: 12px; height: 12px; border-radius: 2px; flex: none; }
.key.must { background: var(--bar); } .key.plus { background: var(--bar-soft); margin-left: 10px; } .key.build { background: var(--mark); }
.key.area { background: var(--bar); height: 3px; width: 16px; } .key.line { background: var(--soft); height: 2px; width: 16px; margin-left: 12px; }

/* AI */
.big { font-family: "Bricolage", sans-serif; font-weight: 700; font-size: clamp(25px, 5.4vw, 36px); line-height: 1.15; max-width: 16ch; }
.waffle-row { display: grid; grid-template-columns: minmax(0, 1fr); gap: 20px; margin-top: 14px; }
.waffle { display: grid; grid-template-columns: repeat(10, 1fr); gap: 3px; max-width: 250px; }
.waffle i { display: block; aspect-ratio: 1; background: var(--track); border-radius: 2px; transition: background 260ms ease-out; }
.reveal.in .waffle i.w-use { background: var(--bar); }
.reveal.in .waffle i.w-build { background: var(--mark); }
.legend-line { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--soft); margin: 4px 0; }
.dot-row { padding: 6px 0; }
.dot-track { position: relative; display: block; height: 16px; }
.dot-track::before { content: ""; position: absolute; left: 0; right: 0; top: 7px; height: 2px; background: var(--track); }
.whisker { position: absolute; top: 6px; height: 4px; background: var(--bar-soft); border-radius: 2px; }
.pin { position: absolute; top: 2px; width: 12px; height: 12px; margin-left: -6px; border-radius: 50%; background: var(--bar); }

/* Planner */
.planner .fields { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; margin-top: 16px; }
.planner label { display: grid; gap: 4px; font-weight: 600; font-size: 15px; }
select { font: 400 16px "Instrument", sans-serif; color: inherit; background: var(--sheet); border: 1.5px solid var(--ink); border-radius: 4px; padding: 9px 10px; min-height: 44px; width: 100%; }
.result-head { font-family: "Bricolage", sans-serif; font-weight: 700; font-size: clamp(23px, 4.8vw, 30px); line-height: 1.18; margin: 26px 0 8px; max-width: 26ch; }
.gap { padding: 14px 0; border-top: 1.5px solid var(--line); max-width: 62ch; }
.gap b { font-family: "Bricolage", sans-serif; font-size: 21px; font-weight: 700; display: block; }
.gap p { margin: 4px 0 0; }
.gap .why { color: var(--soft); font-size: 15px; }
.gap .build { margin-top: 8px; }
.gap .build strong, .detail strong { background: var(--mark); color: var(--on-mark); padding: 0 4px; font-weight: 600; }

/* Employers */
.strip { display: flex; gap: 2px; height: 26px; margin: 18px 0 10px; }
.strip i { display: block; width: 0; height: 100%; transition: width 620ms cubic-bezier(.22, .8, .24, 1); }
.strip-key { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 14.5px; color: var(--soft); }
.strip-key span { display: inline-flex; align-items: center; gap: 6px; }
.strip-key i { display: inline-block; width: 12px; height: 12px; border-radius: 2px; }
.s1 { background: var(--s1); } .s2 { background: var(--s2); } .s3 { background: var(--s3); } .s4 { background: var(--s4); } .s5 { background: var(--s5); }

/* Sections ease in once, the first time they're seen */
.reveal > * { transition: opacity 520ms ease-out, transform 520ms cubic-bezier(.22, .8, .24, 1); }
.reveal:not(.in) > * { opacity: 0; transform: translateY(10px); }

footer { border-top: 1.5px solid var(--line); margin: 8px auto 0; padding: 22px 16px 40px; max-width: 860px; color: var(--soft); font-size: 14.5px; }
footer p { margin-bottom: 6px; }
.made { font: 700 17px "Bricolage", sans-serif; color: var(--ink); }
.links { display: flex; flex-wrap: wrap; gap: 4px 16px; font-weight: 600; color: var(--ink); margin-bottom: 12px; }

@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
@media (min-width: 720px) {
  .nav-brand { display: block; }
  .nav-links { flex: 0 1 auto; gap: 6px; }
  .nav-links a { padding: 7px 11px; font-size: 15px; }
  .ring { flex-direction: row; justify-content: center; text-align: left; gap: 14px; padding: 16px 12px; }
  .split { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); }
  .planner .fields { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .areas { columns: 2; column-gap: 44px; }
  .areas .row { break-inside: avoid; }
  .waffle-row { grid-template-columns: 250px minmax(0, 1fr); gap: 34px; align-items: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal:not(.in) > * { opacity: 1; transform: none; }
}