/* Marketing site. Slash geometry matches docs/brand/tokens.css. */

@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500&family=IBM+Plex+Sans:wght@400;500;600&display=swap");

:root {
  --void: #0b0d10;
  --panel: #14181e;
  --line: #2a333d;
  --ink: #e8edf2;
  --muted: #8b98a5;
  --paper: #edeae3;
  --paper-panel: #f6f3ec;
  --paper-line: #d4cfc4;
  --paper-muted: #5c6570;
  --signal: #3dd68c;
  --deny: #ff6b6b;
  --obligation: #f5c542;
  --radius: 8px;
  --font: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --measure: 68rem;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--void);
  color: var(--ink);
  font: 400 1.0625rem/1.55 var(--font);
}

img,
svg {
  max-width: 100%;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--paper);
  color: var(--void);
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius);
  z-index: 5;
}

.skip:focus {
  top: 0.6rem;
}

.wrap {
  width: min(var(--measure), calc(100% - 2.5rem));
  margin-inline: auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  margin: 0;
  /* Same column as .wrap, so the bar can run to the viewport while the lockup stays aligned. */
  padding-block: 0.85rem;
  padding-inline: max(1.25rem, calc((100% - var(--measure)) / 2));
  background: color-mix(in srgb, var(--void) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.92rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--ink);
}

.authio-lockup {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--font);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.25;
  overflow: visible;
  text-decoration: none;
  user-select: none;
  color: var(--ink);
}

.authio-lockup[data-size="nav"] {
  font-size: calc(1.15rem * 1.2);
}

/* The enlarged nav size snaps the shared 0.138em / 1cap bar a pixel light and short of the letters. */
.authio-lockup[data-size="nav"] .authio-slash {
  width: calc(0.138em * 1.2);
}

.authio-lockup[data-size="nav"] .authio-slash::before {
  height: 0.73em;
}

.authio-slash {
  position: relative;
  display: inline-block;
  width: 0.138em;
  height: 0;
  margin-left: 0.129em;
  margin-right: -0.02em;
  flex-shrink: 0;
}

.authio-slash::before {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 0.7em;
  height: 1cap;
  bottom: 0;
  background: var(--signal);
  transform: skewX(18deg);
  transform-origin: left bottom;
}

.hero {
  padding: 5.5rem 0 4rem;
}

.kicker {
  margin: 0 0 1rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  color: var(--muted);
}

h1 {
  margin: 0;
  max-width: 16ch;
  font-size: clamp(2.7rem, 6vw, 4.5rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.lede {
  max-width: 38rem;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: 1.15rem;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1.8rem;
}

.fine {
  margin: 0.9rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--void);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  padding: 0.72rem 1rem;
  cursor: pointer;
}

.button.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.shelf {
  background: var(--paper);
  color: var(--void);
  padding: 4.5rem 0;
}

.shelf h2,
.stories h2,
.case h2,
.list h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.shelf .intro,
.stories .intro,
.case .intro,
.list .intro {
  max-width: 36rem;
  margin: 0.8rem 0 0;
}

.shelf .intro {
  color: var(--paper-muted);
}

.planes {
  display: grid;
  grid-template-columns: 9rem 1fr 1.3fr;
  gap: 0;
  margin: 2.2rem 0 0;
  border-top: 1px solid var(--paper-line);
}

.planes div {
  padding: 1rem 1rem 1rem 0;
  border-bottom: 1px solid var(--paper-line);
}

.planes .who {
  color: var(--paper-muted);
}

.planes .ours {
  font-weight: 600;
}

.planes .action {
  background: var(--void);
  color: var(--ink);
  padding-left: 1rem;
  margin-left: -1rem;
  padding-right: 1rem;
}

.planes .action .who {
  color: var(--muted);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.metrics li {
  border-top: 1px solid var(--paper-line);
  padding-top: 0.8rem;
}

.metrics strong {
  display: block;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.metrics span {
  color: var(--paper-muted);
  font-size: 0.88rem;
}

.stories {
  padding: 4.5rem 0;
}

.stories .intro,
.case .intro,
.list .intro {
  color: var(--muted);
}

.case {
  padding: 0 0 4.5rem;
}

.case-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0 0;
}

.case-facts div {
  margin: 0;
  border-top: 1px solid var(--line);
  padding-top: 0.8rem;
}

.case-facts dt {
  font-weight: 600;
  letter-spacing: -0.02em;
}

.case-facts dd {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.case-fig {
  margin-top: 1.6rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1rem 0.9rem;
}

.case-switch {
  display: flex;
  gap: 0.4rem;
}

.case-switch button,
.case-beats button {
  font: inherit;
  cursor: pointer;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
}

.case-switch button {
  padding: 0.4rem 0.7rem;
}

.case-switch button[aria-pressed="true"] {
  border-color: var(--line);
  background: var(--void);
  color: var(--ink);
}

.case-beats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.4rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.case-beats button {
  width: 100%;
  text-align: left;
  padding: 0.45rem 0.55rem;
  border-bottom: 2px solid var(--line);
  border-radius: 0;
}

.case-beats button[aria-current="step"] {
  color: var(--ink);
  border-bottom-color: var(--signal);
}

.case-scene {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0.7rem;
  align-items: stretch;
  margin-top: 1.1rem;
}

.case-node,
.case-link,
.case-record {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.8rem 0.75rem;
  opacity: 0.4;
}

.case-link {
  border: 0;
  padding: 0;
}

.case-fig[data-beat="1"] [data-node="1"],
.case-fig[data-beat="2"] [data-node="2"],
.case-fig[data-beat="3"] [data-node="3"],
.case-fig[data-beat="4"] [data-node="4"] {
  opacity: 1;
  border-color: var(--ink);
}

.case-fig[data-mode="closed"][data-beat="2"] .case-node.child,
.case-fig[data-mode="closed"][data-beat="4"] .case-record {
  border-color: var(--signal);
}

.case-fig[data-mode="closed"][data-beat="3"] [data-node="3"] {
  border-color: var(--deny);
}

.case-node .stereo,
.case-link {
  display: block;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.case-node strong {
  display: block;
  margin: 0.3rem 0 0.45rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.case-node ul {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.78rem;
}

.case-node li + li {
  margin-top: 0.2rem;
}

.case-link {
  align-self: center;
  text-align: center;
  max-width: 5.5rem;
}

.case-record {
  display: none;
  margin: 0.8rem 0 0;
  font-size: 0.92rem;
}

.case-fig[data-beat="4"] .case-record {
  display: block;
}

.case-fig[data-mode="gap"] .closed-copy,
.case-fig[data-mode="closed"] .gap-copy {
  display: none;
}

.case-node .chip {
  margin-top: 0.55rem;
}

.case-receipt {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.stage {
  display: grid;
  grid-template-columns: 16rem 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
  align-items: start;
}

.story-list {
  display: grid;
  gap: 0.4rem;
}

.story-list button {
  text-align: left;
  background: transparent;
  color: var(--ink);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.75rem 0.8rem;
  font: inherit;
  cursor: pointer;
}

.story-list button[aria-selected="true"] {
  border-color: var(--line);
  background: var(--panel);
}

.story-list small {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.canvas {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  min-height: 22rem;
  padding: 1rem 1rem 0.9rem;
}

.scene[hidden] {
  display: none;
}

.scene svg {
  display: block;
  width: 100%;
  height: auto;
}

.scene text {
  fill: var(--ink);
  font-family: var(--font);
  font-size: 13px;
}

.scene .quiet {
  fill: var(--muted);
  font-size: 11px;
}

.life {
  stroke: var(--line);
  stroke-width: 1;
}

.hop {
  opacity: 0.28;
}

.hop line {
  stroke: var(--muted);
  stroke-width: 1.4;
}

.hop polygon {
  fill: var(--muted);
}

.hop.is-on {
  opacity: 1;
}

.hop.is-on line {
  stroke: var(--signal);
}

.hop.is-on polygon {
  fill: var(--signal);
}

.hop.back.is-on line {
  stroke: var(--obligation);
}

.hop.back.is-on polygon {
  fill: var(--obligation);
}

.hop.back line {
  stroke-dasharray: 4 3;
}

.box {
  fill: none;
  stroke: var(--line);
  stroke-width: 1.25;
}

.box.on {
  stroke: var(--ink);
}

.widen-label,
.struck {
  opacity: 0;
}

.is-widened .widen-label,
.is-widened .struck {
  opacity: 1;
}

.is-widened .widen-label {
  fill: var(--deny);
}

.deny-chip text {
  fill: var(--void);
}

.is-revoked .deny-chip {
  opacity: 1;
}

.deny-chip {
  opacity: 0;
}

.flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0.6rem;
  align-items: center;
  margin-top: 0.4rem;
}

.node {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 0.75rem;
  min-height: 5.5rem;
}

.node .stereo {
  display: block;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  margin-bottom: 0.35rem;
}

.node strong {
  font-weight: 600;
  letter-spacing: -0.02em;
}

.edge {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  text-align: center;
  max-width: 7rem;
}

.edge.is-allow {
  color: var(--signal);
}

.edge.is-deny {
  color: var(--deny);
}

.code {
  margin: 1rem 0 0;
  padding: 0.8rem 0.9rem;
  background: var(--void);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.82rem;
  overflow-x: auto;
}

.stage-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.9rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

.receipt {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.chip {
  display: inline-block;
  border-radius: 999px;
  padding: 0.12rem 0.45rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
}

.chip.allow {
  background: var(--signal);
  color: var(--void);
}

.chip.obligation {
  background: var(--obligation);
  color: var(--void);
}

.chip.deny {
  background: var(--deny);
  color: var(--void);
}

.list {
  padding: 1rem 0 5rem;
}

.list-card {
  margin-top: 1.6rem;
  max-width: 32rem;
  border-top: 1px solid var(--line);
  padding-top: 1.2rem;
}

form {
  display: grid;
  gap: 0.85rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--muted);
}

input,
select {
  font: inherit;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.65rem 0.7rem;
}

.list-done {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1rem 1.1rem;
  background: var(--panel);
}

.list-done p {
  margin: 0.35rem 0 0.9rem;
}

.list-done strong {
  color: var(--ink);
}

.error {
  margin: 0;
  color: var(--deny);
  font-size: 0.88rem;
}

.foot {
  border-top: 1px solid var(--line);
  padding: 1.4rem 0 2rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.foot p {
  margin: 0;
  max-width: 40rem;
}

@media (max-width: 800px) {
  .nav-links a:not(.button) {
    display: none;
  }

  .planes,
  .metrics,
  .stage,
  .flow,
  .case-facts,
  .case-beats,
  .case-scene {
    grid-template-columns: 1fr;
  }

  .case-link {
    max-width: none;
    text-align: left;
    padding-left: 0.2rem;
  }

  .case-link::before {
    content: "↓ ";
  }

  .planes .action {
    margin-left: 0;
  }

  .edge {
    max-width: none;
    text-align: left;
    padding-left: 0.2rem;
  }

  .edge::before {
    content: "↓ ";
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hop {
    transition: none;
  }
}