/* Hallmark · pre-emit critique: P5 H4 E5 S5 R4 V5 */
/* Hallmark · genre: atmospheric · macrostructure: Split Studio · theme: custom (Spectrum)
 * enrichment: Tier-B SVG mandala (18 custom-H traces) · nav: N5 floating pill · footer: Ft5 statement
 * H2 knobs: ratio=7/5 · proof=live kaleidoscope · divider=negative space
 * theme: custom · vibe: "kaleidoscope spectrum, multi-identity colors, nocturnal prism"
 * paper: oklch(13.5% 0.014 275) · accent: oklch(66% 0.19 275)
 * display: Clash Display + PingFang SC · body: PingFang SC · mono: IBM Plex Mono
 * axes: dark / geometric-sans / cool · studied: no · designed-as-app: website/design.md
 */

/* ── Base ────────────────────────────────────────────────────────────────── */

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

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  overflow-x: clip;
  margin: 0;
  min-width: 0;
  background-color: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 5;
  pointer-events: none;
  opacity: var(--noise-opacity, 0.018);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection {
  background: color-mix(in oklch, var(--color-accent) 42%, transparent);
  color: var(--color-ink);
}

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

img {
  height: auto;
}

h1,
h2,
h3,
h4,
p,
figure,
blockquote,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  font-style: normal;
  overflow-wrap: anywhere;
  min-width: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
}

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

/* ── Ambient ground ──────────────────────────────────────────────────────── */

.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(46% 34% at 78% -8%, color-mix(in oklch, var(--color-space-indigo) var(--ambient-mix-1, 17%), transparent), transparent 70%),
    radial-gradient(38% 30% at 4% 96%, color-mix(in oklch, var(--color-space-purple) var(--ambient-mix-2, 10%), transparent), transparent 72%);
}

.site {
  position: relative;
  z-index: 1;
}

/* ── Layout ──────────────────────────────────────────────────────────────── */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(3.5rem, 7vw, 6rem);
}

.section--lead {
  padding-block-start: clamp(4.5rem, 9vw, 7.5rem);
}

.section--tight {
  padding-block-start: clamp(2.5rem, 5vw, 4rem);
}

.section--close {
  padding-block-end: clamp(4rem, 8vw, 6.5rem);
}

.skip-link {
  position: absolute;
  left: var(--space-md);
  top: -100%;
  z-index: var(--z-modal);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  background: var(--color-ink);
  color: var(--color-paper);
  font-weight: 600;
}

.skip-link:focus-visible {
  top: var(--space-md);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.tnum {
  font-variant-numeric: tabular-nums;
}

/* ── Typography ──────────────────────────────────────────────────────────── */

.display {
  font-family: var(--font-display);
  font-weight: 600;
  font-style: normal;
  letter-spacing: -0.035em;
  line-height: var(--leading-tight);
  text-wrap: balance;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-style: normal;
  font-size: clamp(1.85rem, 2.4vw + 1rem, 2.9rem);
  letter-spacing: -0.03em;
  line-height: 1.12;
  text-wrap: balance;
}

.section-lede {
  margin-top: var(--space-md);
  max-width: 46rem;
  color: var(--color-ink-2);
  font-size: clamp(1rem, 0.35vw + 0.92rem, 1.0625rem);
  line-height: 1.78;
}

.section-head {
  max-width: 46rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-head--wide {
  max-width: 58rem;
}

.meta {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-neutral);
  font-variant-numeric: tabular-nums;
}

/* ── Links & buttons ─────────────────────────────────────────────────────── */

.link {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklch, var(--color-accent) 65%, transparent);
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
  transition: text-decoration-color var(--dur-short) var(--ease-out);
}

.link:hover {
  text-decoration-color: var(--color-accent);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 44px;
  color: var(--color-ink);
  font-size: 0.9375rem;
  font-weight: 500;
  white-space: nowrap;
}

.link-arrow__line {
  display: block;
  width: 1.6rem;
  height: 1px;
  background: var(--color-accent);
  transform-origin: left center;
  transition: transform var(--dur-short) var(--ease-out);
}

.link-arrow:hover .link-arrow__line {
  transform: scaleX(1.35);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.68rem 1.2rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--dur-short) var(--ease-out),
    border-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out),
    transform var(--dur-micro) var(--ease-out);
}

.btn--primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-rule);
  color: var(--color-ink);
}

.btn--sm {
  min-height: 38px;
  padding: 0.45rem 0.9rem;
  font-size: 0.875rem;
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.space-chip:active,
.space-row:active {
  transform: translateY(1px);
}

@media (hover: hover) and (pointer: fine) {
  .btn--primary:hover {
    background: color-mix(in oklch, var(--color-accent) 82%, var(--color-ink));
    border-color: color-mix(in oklch, var(--color-accent) 82%, var(--color-ink));
  }

  .btn--ghost:hover {
    background: var(--color-paper-2);
    border-color: color-mix(in oklch, var(--color-ink-2) 45%, transparent);
  }
}

/* ── Navigation (N5 floating pill) ───────────────────────────────────────── */

.nav-shell {
  position: fixed;
  inset: clamp(0.75rem, 2vw, 1.5rem) 0 auto;
  display: flex;
  justify-content: center;
  z-index: var(--z-sticky);
  padding-inline: var(--gutter);
  pointer-events: none;
}

.nav {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  width: max-content;
  max-width: 100%;
  padding: 0.4rem 0.4rem 0.4rem 0.8rem;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-pill);
  background: color-mix(in oklch, var(--color-paper) 78%, transparent);
  box-shadow: var(--shadow-pill);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 40px;
  color: var(--color-ink);
  font-family: var(--font-wordmark);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  white-space: nowrap;
}

.brand img {
  width: 26px;
  height: 26px;
  border-radius: 7px;
}

.nav__links {
  display: none;
  align-items: center;
  gap: 0.125rem;
  list-style: none;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 0.7rem;
  border-radius: var(--radius-pill);
  color: var(--color-ink-2);
  font-size: var(--text-sm);
  white-space: nowrap;
  transition:
    color var(--dur-short) var(--ease-out),
    background-color var(--dur-short) var(--ease-out);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--color-ink);
  background: var(--color-paper-2);
}

.nav__link[aria-current="page"] {
  color: var(--color-ink);
  background: var(--color-paper-2);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  min-width: 36px;
  min-height: 36px;
  margin-inline-start: auto;
  padding: 0;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-2);
  cursor: pointer;
  transition:
    color var(--dur-short) var(--ease-out),
    background-color var(--dur-short) var(--ease-out),
    border-color var(--dur-short) var(--ease-out),
    transform var(--dur-micro) var(--ease-out);
}

.theme-toggle:hover {
  color: var(--color-ink);
  background: var(--color-paper-2);
}

.theme-toggle:active {
  transform: translateY(1px);
}

.theme-toggle svg {
  display: block;
  width: 17px;
  height: 17px;
}

.theme-toggle__icon--light {
  display: block;
}

.theme-toggle__icon--dark {
  display: none;
}

:root[data-theme="light"] .theme-toggle__icon--light {
  display: none;
}

:root[data-theme="light"] .theme-toggle__icon--dark {
  display: block;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .theme-toggle__icon--light {
    display: none;
  }

  :root:not([data-theme="dark"]) .theme-toggle__icon--dark {
    display: block;
  }
}

.nav__cta {
  margin-inline-start: 0;
}

/* ── Hero ────────────────────────────────────────────────────────────────── */

.hero {
  padding-block: clamp(6.25rem, 8vw, 7rem) clamp(8.125rem, 10.4vw, 9.1rem);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 4.5rem);
  align-items: center;
}

.hero__copy {
  min-width: 0;
  max-width: 38rem;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--color-ink-2);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}

.status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  transition: background-color var(--dur-long) var(--ease-out);
}

.hero__title {
  margin-top: var(--space-lg);
  max-width: 11em;
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 600;
  font-style: normal;
  letter-spacing: -0.035em;
  line-height: var(--leading-tight);
  text-wrap: balance;
}

.hero__lede {
  margin-top: var(--space-lg);
  max-width: 36rem;
  color: var(--color-ink-2);
  font-size: clamp(1rem, 0.4vw + 0.9rem, 1.125rem);
  line-height: 1.78;
}

.hero__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  margin-top: var(--space-xl);
}

.hero__visual {
  position: relative;
  min-width: 0;
}

/* Entrance — one orchestrated moment, once. */
.hero__copy > *,
.hero__visual {
  animation: rise var(--dur-long) var(--ease-out) both;
}

.hero__copy > :nth-child(1) { animation-delay: 0ms; }
.hero__copy > :nth-child(2) { animation-delay: 70ms; }
.hero__copy > :nth-child(3) { animation-delay: 140ms; }
.hero__copy > :nth-child(4) { animation-delay: 210ms; }
.hero__copy > :nth-child(5) { animation-delay: 280ms; }
.hero__visual { animation-delay: 160ms; }

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ── Space picker ────────────────────────────────────────────────────────── */

.space-picker {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-rule-2);
}

.space-picker__label {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-neutral);
}

.space-picker__options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

.space-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 38px;
  padding: 0.32rem 0.72rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-2);
  font-size: 0.8125rem;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--dur-short) var(--ease-out),
    border-color var(--dur-short) var(--ease-out),
    color var(--dur-short) var(--ease-out);
}

.space-chip__dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--dot, var(--color-accent));
}

.space-chip:hover {
  color: var(--color-ink);
  background: var(--color-paper-2);
}

.space-chip[aria-pressed="true"] {
  color: var(--color-ink);
  background: var(--color-paper-2);
  border-color: var(--color-rule);
}

.space-chip[aria-pressed="true"] .space-chip__dot {
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--dot, var(--color-accent)) 34%, transparent);
}

[data-space-option="daily"] .space-chip__dot,
[data-space-option="daily"] .space-row__dot { --dot: var(--color-space-indigo); }
[data-space-option="work"] .space-chip__dot,
[data-space-option="work"] .space-row__dot { --dot: var(--color-space-sky); }
[data-space-option="study"] .space-chip__dot,
[data-space-option="study"] .space-row__dot { --dot: var(--color-space-emerald); }
[data-space-option="media"] .space-chip__dot,
[data-space-option="media"] .space-row__dot { --dot: var(--color-space-amber); }
[data-space-option="private"] .space-chip__dot,
[data-space-option="private"] .space-row__dot { --dot: var(--color-space-purple); }

.space-picker__status {
  margin-top: var(--space-md);
  min-height: 2.8em;
  max-width: 32rem;
  color: var(--color-neutral);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.65;
  letter-spacing: 0.02em;
}

.space-picker__status strong {
  color: var(--color-ink-2);
  font-weight: 500;
}

/* ── Kaleidoscope (Tier-B SVG: 18 custom-H traces) ───────────────────────── */

.kaleido {
  width: 100%;
  max-width: 520px;
  margin-inline: auto;
}

.kaleido__art {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 1;
  overflow: clip;
}

.kaleido__glow {
  position: absolute;
  inset: 2%;
  border-radius: 50%;
  background: radial-gradient(
    circle at 50% 50%,
    color-mix(in oklch, var(--color-accent) 24%, transparent),
    transparent 62%
  );
  filter: blur(30px);
  transition: background var(--dur-long) var(--ease-out);
}

.kaleido__svg {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  animation: kaleido-spin var(--dur-spin) linear infinite;
}

:root[data-theme="light"] .kaleido__svg {
  filter: brightness(0.78) contrast(1.15) saturate(1.2);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .kaleido__svg {
    filter: brightness(0.78) contrast(1.15) saturate(1.2);
  }
}

@keyframes kaleido-spin {
  to { transform: rotate(360deg); }
}

.kaleido__caption {
  margin-top: var(--space-md);
  text-align: center;
  color: var(--color-neutral);
  font-size: 0.66rem;
  line-height: 1.6;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Split Studio ────────────────────────────────────────────────────────── */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.split__copy {
  min-width: 0;
  max-width: 36rem;
}

.split__proof {
  min-width: 0;
}

.split__copy p {
  margin-top: var(--space-md);
  color: var(--color-ink-2);
  font-size: 1rem;
  line-height: 1.8;
}

.split__copy p strong {
  color: var(--color-ink);
  font-weight: 500;
}

.split__copy .link-arrow {
  margin-top: var(--space-lg);
}

/* ── Space stack ─────────────────────────────────────────────────────────── */

.space-stack {
  border-top: 1px solid var(--color-rule);
}

.space-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 1rem 0.35rem;
  border: 0;
  border-bottom: 1px solid var(--color-rule-2);
  border-radius: 0;
  background: none;
  text-align: left;
  cursor: pointer;
  transition: background-color var(--dur-short) var(--ease-out);
}

.space-row__dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--dot, var(--color-accent));
}

.space-row__name {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-ink);
}

.space-row__meta {
  grid-column: 2;
  margin-top: 0.15rem;
  color: var(--color-neutral);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.space-row[aria-pressed="true"] {
  background: var(--color-paper-2);
}

.space-row[aria-pressed="true"] .space-row__name {
  color: var(--dot, var(--color-accent));
}

.space-row:hover {
  background: var(--color-paper-2);
}

.space-stack__note {
  margin-top: var(--space-md);
  color: var(--color-neutral);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* ── Spec sheet (F3) ─────────────────────────────────────────────────────── */

.spec {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  text-align: left;
}

.spec caption {
  padding-bottom: var(--space-sm);
  text-align: left;
  color: var(--color-neutral);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.spec thead {
  display: none;
}

.spec,
.spec tbody,
.spec tr,
.spec th,
.spec td {
  display: block;
  width: auto;
}

.spec tr {
  padding-block: 0.9rem;
  border-top: 1px solid var(--color-rule-2);
}

.spec tr:last-child {
  border-bottom: 1px solid var(--color-rule-2);
}

.spec th,
.spec td {
  padding: 0;
  border: 0;
  vertical-align: top;
}

.spec tbody th {
  color: var(--color-ink);
  font-weight: 500;
}

.spec td {
  margin-top: 0.25rem;
  color: var(--color-ink-2);
}

.spec .accent {
  color: var(--color-accent);
}

/* ── Band (brand interlude) ──────────────────────────────────────────────── */

.band {
  background: var(--color-paper-2);
  padding-block: clamp(4rem, 8vw, 7rem);
}

.band__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}

.band__mark {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 18rem;
  order: -1;
}

.band__mark::before {
  content: "";
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  background: radial-gradient(
    circle at 50% 50%,
    color-mix(in oklch, var(--color-space-indigo) 20%, transparent),
    transparent 64%
  );
  filter: blur(34px);
}

.band__logo {
  position: relative;
  width: min(68%, 22rem);
  height: auto;
  aspect-ratio: 1;
  filter: drop-shadow(0 24px 70px color-mix(in oklch, var(--color-space-indigo) 28%, transparent));
  animation: kaleido-spin var(--dur-spin) linear infinite;
}

:root[data-theme="light"] .band__logo {
  filter: brightness(0.78) contrast(1.15) saturate(1.2) drop-shadow(0 20px 50px color-mix(in oklch, var(--color-space-indigo) 18%, transparent));
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .band__logo {
    filter: brightness(0.78) contrast(1.15) saturate(1.2) drop-shadow(0 20px 50px color-mix(in oklch, var(--color-space-indigo) 18%, transparent));
  }
}

.band__caption {
  margin-top: var(--space-md);
  text-align: center;
  color: var(--color-neutral);
  font-size: 0.66rem;
  line-height: 1.6;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.band__copy p {
  margin-top: var(--space-md);
  max-width: 34rem;
  color: var(--color-ink-2);
  font-size: 1rem;
  line-height: 1.8;
}

.band__copy p strong {
  color: var(--color-ink);
  font-weight: 500;
}

/* ── Craft list ──────────────────────────────────────────────────────────── */

.craft-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--color-rule);
}

.craft-item {
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--color-rule-2);
}

.craft-item h3 {
  margin: 0 0 0.3rem;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: 0;
}

.craft-item p {
  margin: 0;
  color: var(--color-ink-2);
  font-size: 0.9375rem;
  line-height: 1.72;
}

/* ── Footer (Ft5 statement) ──────────────────────────────────────────────── */

.foot {
  padding-block: clamp(4.5rem, 9vw, 8rem) var(--space-xl);
}

.foot__line {
  max-width: 17em;
  overflow-wrap: anywhere;
  min-width: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.7rem);
  font-weight: 600;
  font-style: normal;
  letter-spacing: -0.035em;
  line-height: 1.06;
  text-wrap: balance;
}

.foot__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  margin-top: var(--space-xl);
}

.foot__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: clamp(3rem, 6vw, 5rem);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-rule-2);
  color: var(--color-neutral);
  font-size: 0.8rem;
}

.foot__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-ink);
  font-family: var(--font-wordmark);
  font-weight: 600;
}

.foot__brand img {
  width: 22px;
  height: 22px;
  border-radius: 6px;
}

.foot__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  list-style: none;
}

.foot__links a {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  color: var(--color-ink-2);
  white-space: nowrap;
}

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

.foot--compact {
  padding-block: var(--space-2xl) var(--space-xl);
}

.foot--compact .foot__line {
  max-width: 26em;
  font-size: clamp(1.35rem, 2vw + 1rem, 2rem);
}

.foot--compact .foot__actions {
  margin-top: var(--space-lg);
}

.foot--compact .foot__meta {
  margin-top: var(--space-xl);
}

.foot__colophon {
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  line-height: 1.7;
}

/* ── Document pages (Long Document) ──────────────────────────────────────── */

.doc-hero {
  padding-block: clamp(7rem, 13vw, 10rem) clamp(2.5rem, 5vw, 4rem);
}

.doc-hero__kicker {
  color: var(--color-neutral);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.doc-hero h1 {
  max-width: 20em;
  margin-top: var(--space-md);
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 3.2vw + 1rem, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.08;
  text-wrap: balance;
}

.doc-hero__meta {
  margin-top: var(--space-md);
  color: var(--color-neutral);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  line-height: 1.7;
}

.doc-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
  padding-block-end: clamp(4rem, 9vw, 7rem);
}

.doc-toc {
  align-self: start;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-rule-2);
}

.doc-toc__title {
  color: var(--color-neutral);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.doc-toc ol {
  margin-top: var(--space-sm);
  list-style: none;
}

.doc-toc li {
  margin: 0;
}

.doc-toc a {
  display: block;
  padding: 0.34rem 0;
  color: var(--color-ink-2);
  font-size: 0.875rem;
  line-height: 1.5;
  border-bottom: 1px solid transparent;
}

.doc-toc a:hover {
  color: var(--color-ink);
}

.doc-body {
  max-width: var(--measure);
  min-width: 0;
}

.doc-body > :first-child {
  margin-top: 0;
}

.doc-body h2 {
  margin-top: var(--space-2xl);
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 1.2vw + 1.15rem, 1.85rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.24;
}

.doc-body h3 {
  margin-top: var(--space-xl);
  color: var(--color-ink);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.5;
}

.doc-body p {
  margin-top: var(--space-md);
  color: var(--color-ink-2);
  line-height: 1.82;
}

.doc-body ul,
.doc-body ol {
  margin-top: var(--space-md);
  padding-inline-start: 1.15rem;
  color: var(--color-ink-2);
}

.doc-body li {
  margin-top: var(--space-xs);
  padding-inline-start: 0.25rem;
  line-height: 1.78;
}

.doc-body li::marker {
  color: var(--color-neutral);
}

.doc-body a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: text-decoration-color var(--dur-short) var(--ease-out);
}

.doc-body a:hover {
  text-decoration-color: var(--color-ink);
}

.doc-body strong {
  color: var(--color-ink);
  font-weight: 500;
}

.doc-body code {
  padding: 0.1em 0.4em;
  border-radius: 4px;
  background: var(--color-paper-2);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 0.86em;
  overflow-wrap: anywhere;
}

.doc-body hr {
  height: 1px;
  margin-block: var(--space-2xl);
  border: 0;
  background: var(--color-rule-2);
}

.doc-lede {
  color: var(--color-ink) !important;
  font-size: 1.0625rem;
  line-height: 1.8;
}

.callout {
  margin-block: var(--space-xl);
  padding: var(--space-lg);
  border-left: 2px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-paper-2);
}

.callout > :first-child {
  margin-top: 0;
}

.callout p {
  margin-top: var(--space-sm);
  color: var(--color-ink-2);
}

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

.callout--warn {
  border-left-color: var(--color-space-amber);
}

.doc-body .spec {
  margin-top: var(--space-lg);
}

.doc-body .spec + p {
  margin-top: var(--space-lg);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */

@media (min-width: 40rem) {
  .spec {
    display: table;
  }

  .spec thead {
    display: table-header-group;
  }

  .spec tbody {
    display: table-row-group;
  }

  .spec tr {
    display: table-row;
  }

  .spec th,
  .spec td {
    display: table-cell;
    padding: 0.9rem 1rem 0.9rem 0;
  }

  .spec thead th {
    padding-top: 0;
    padding-bottom: 0.6rem;
    border-top: 0;
    color: var(--color-neutral);
    font-family: var(--font-mono);
    font-size: 0.66rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    white-space: nowrap;
  }

  .spec tbody th {
    width: 36%;
  }

  .spec tbody th + td {
    padding-inline-start: 0.5rem;
  }

  .space-row {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .space-row__meta {
    grid-column: 3;
    margin-top: 0;
  }

  .craft-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(2rem, 5vw, 4rem);
  }

  .foot__meta {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
  }
}

@media (max-width: 59.99rem) {
  .doc-toc {
    display: none;
  }
}

@media (min-width: 52rem) {
  .nav__links {
    display: flex;
  }
}

@media (min-width: 60rem) {
  .hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .split--reverse {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .split--reverse .split__copy {
    grid-column: 2;
    grid-row: 1;
  }

  .split--reverse .split__proof {
    grid-column: 1;
    grid-row: 1;
  }

  .band__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .band__mark {
    order: 0;
  }

  .doc-layout {
    grid-template-columns: 13rem minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 5rem);
  }

  .doc-toc {
    position: sticky;
    top: 7rem;
  }
}

@media (pointer: coarse) {
  .nav__link,
  .space-chip,
  .space-row,
  .theme-toggle,
  .btn--sm {
    min-height: 44px;
  }

  .theme-toggle {
    min-width: 44px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }

  .kaleido__svg,
  .band__logo {
    animation: none !important;
  }

  .hero__copy > *,
  .hero__visual {
    animation: none;
    opacity: 1;
    transform: none;
  }
}