/* Side Kiln — Night Desk Wire */
:root {
  --void: #07090D;
  --panel: #0E131A;
  --ink: #E6EDF5;
  --muted: #8A96A6;
  --wire: #2A3544;
  --signal: #5EEAD4;
  --warn: #E8B86D;
  --danger-soft: #C97878;
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Literata", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --shell: min(1120px, calc(100% - 2.5rem));
  --rise: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 20% -10%, rgba(94, 234, 212, 0.06), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(232, 184, 109, 0.04), transparent 50%),
    var(--void);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.45;
  background-image:
    linear-gradient(var(--wire) 1px, transparent 1px),
    linear-gradient(90deg, var(--wire) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 20%, transparent 75%);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--signal);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: #9af5e6;
}

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

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--panel);
  color: var(--ink);
  padding: 0.6rem 1rem;
  z-index: 100;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

/* Sticky desk progress */
.desk-progress {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.55rem 1rem;
  background: rgba(7, 9, 13, 0.92);
  border-bottom: 1px solid var(--wire);
  backdrop-filter: blur(10px);
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.desk-progress.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.desk-progress a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  padding: 0.35rem 0.85rem;
  border: 1px solid transparent;
}

.desk-progress a[aria-current="true"],
.desk-progress a:hover {
  color: var(--signal);
  border-color: var(--wire);
  background: var(--panel);
}

/* Top bar */
.top {
  border-bottom: 1px solid var(--wire);
  background: linear-gradient(180deg, rgba(14, 19, 26, 0.9), rgba(7, 9, 13, 0.4));
}

.top__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0 0.65rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.brand__mark {
  width: 1.35rem;
  height: 1.35rem;
  border: 1.5px solid var(--signal);
  background:
    linear-gradient(var(--signal), var(--signal)) center / 60% 1.5px no-repeat,
    linear-gradient(var(--signal), var(--signal)) center / 1.5px 60% no-repeat;
  box-shadow: 0 0 12px rgba(94, 234, 212, 0.25);
}

.top__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  padding: 0.35rem 0 1rem;
}

.nav a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
}

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

/* Hero — brand first, no cards */
.hero {
  position: relative;
  padding: clamp(3.5rem, 9vw, 6.5rem) 0 clamp(2.5rem, 6vw, 4rem);
  overflow: hidden;
}

.hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cpath d='M0 60h120M60 0v120' stroke='%232A3544' stroke-width='1' fill='none'/%3E%3Ccircle cx='60' cy='60' r='2' fill='%235EEAD4' fill-opacity='0.35'/%3E%3C/svg%3E");
  mask-image: linear-gradient(180deg, #000 40%, transparent 95%);
}

.hero__inner {
  position: relative;
  max-width: 38rem;
}

.hero .brand-hero {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  line-height: 0.95;
  letter-spacing: -0.035em;
  color: var(--ink);
  margin: 0 0 1.25rem;
  text-shadow: 0 0 40px rgba(94, 234, 212, 0.12);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 0.85rem;
  max-width: 28rem;
}

.hero__lead {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 32rem;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--wire);
  background: var(--panel);
  color: var(--ink);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.btn:hover {
  border-color: var(--signal);
  color: var(--signal);
  box-shadow: 0 0 18px rgba(94, 234, 212, 0.15);
}

.btn--ghost {
  background: transparent;
}

/* Sections */
.block {
  padding: clamp(2.5rem, 6vw, 4.25rem) 0;
  border-top: 1px solid var(--wire);
}

.block__head {
  margin-bottom: 1.75rem;
  max-width: 40rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  margin: 0 0 0.65rem;
}

.block h2,
.prose h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}

.block__head p,
.lede {
  margin: 0;
  color: var(--muted);
}

/* Wire diagram */
.wire-stage {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
  align-items: stretch;
}

@media (max-width: 860px) {
  .wire-stage {
    grid-template-columns: 1fr;
  }
}

.wire-canvas {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--wire);
  min-height: 280px;
  padding: 1rem;
  overflow: hidden;
}

.wire-canvas::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(42, 53, 68, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 53, 68, 0.55) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.55;
  pointer-events: none;
}

.wire-svg {
  position: relative;
  width: 100%;
  height: auto;
  display: block;
}

.wire-path {
  fill: none;
  stroke: var(--wire);
  stroke-width: 2;
  stroke-dasharray: 6 5;
  transition: stroke 0.25s ease, filter 0.25s ease;
}

.wire-canvas:hover .wire-path {
  stroke: rgba(94, 234, 212, 0.55);
  filter: drop-shadow(0 0 6px rgba(94, 234, 212, 0.35));
}

.wire-node {
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--rise), transform var(--rise), filter 0.25s ease;
}

.wire-node.is-in {
  opacity: 1;
  transform: none;
}

.wire-node:nth-child(1) { transition-delay: 0.05s; }
.wire-node:nth-child(2) { transition-delay: 0.18s; }
.wire-node:nth-child(3) { transition-delay: 0.32s; }

.wire-node circle {
  fill: var(--panel);
  stroke: var(--signal);
  stroke-width: 2;
  transition: fill 0.2s ease, filter 0.2s ease;
}

.wire-node[aria-pressed="true"] circle,
.wire-node:hover circle,
.wire-node:focus-visible circle {
  fill: rgba(94, 234, 212, 0.12);
  filter: drop-shadow(0 0 10px rgba(94, 234, 212, 0.45));
}

.wire-node text {
  fill: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.wire-panel {
  background: var(--panel);
  border: 1px solid var(--wire);
  padding: 1.25rem 1.35rem;
  min-height: 280px;
  display: flex;
  flex-direction: column;
}

.wire-panel__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--warn);
  margin: 0 0 0.5rem;
}

.wire-panel h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.wire-panel p {
  margin: 0;
  color: var(--muted);
  flex: 1;
}

.wire-panel__hint {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
}

/* Timeline scrub */
.diverge {
  position: relative;
}

.diverge__track {
  position: sticky;
  top: 3.25rem;
  z-index: 5;
  height: 3px;
  background: var(--wire);
  margin-bottom: 1.5rem;
  border-radius: 2px;
  overflow: hidden;
}

.diverge__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--signal), var(--warn));
  box-shadow: 0 0 12px rgba(94, 234, 212, 0.4);
}

.diverge__markers {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.diverge__markers button {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--wire);
  padding: 0.4rem 0.7rem;
  cursor: pointer;
}

.diverge__markers button.is-active {
  color: var(--signal);
  border-color: var(--signal);
  box-shadow: 0 0 12px rgba(94, 234, 212, 0.15);
}

.diverge__steps {
  display: grid;
  gap: 1rem;
}

.diverge-step {
  border-left: 2px solid var(--wire);
  padding: 0.35rem 0 0.35rem 1.15rem;
  opacity: 0.45;
  transition: opacity 0.35s ease, border-color 0.35s ease;
}

.diverge-step.is-active {
  opacity: 1;
  border-color: var(--signal);
}

.diverge-step h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
}

.diverge-step p {
  margin: 0;
  color: var(--muted);
}

/* Library list — not card grid */
.library {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--wire);
}

.library li {
  border-bottom: 1px solid var(--wire);
}

.library a {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1.15rem 0.25rem;
  text-decoration: none;
  color: inherit;
  transition: background 0.2s ease;
}

.library a:hover {
  background: rgba(94, 234, 212, 0.04);
}

.library__idx {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--signal);
}

.library__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.015em;
}

.library__meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
}

@media (max-width: 640px) {
  .library a {
    grid-template-columns: auto 1fr;
  }
  .library__meta {
    grid-column: 2;
  }
}

/* Standards / not list */
.principles,
.not-list,
.faq,
.meta-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.principles li,
.not-list li {
  padding: 1rem 0;
  border-top: 1px solid var(--wire);
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 0.75rem;
}

.principles li:last-child,
.not-list li:last-child {
  border-bottom: 1px solid var(--wire);
}

.principles strong,
.not-list strong {
  font-family: var(--font-display);
  display: block;
  margin-bottom: 0.25rem;
}

.principles span:first-child,
.not-list span:first-child {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--signal);
}

.not-list span:first-child {
  color: var(--danger-soft);
}

/* FAQ accordion */
.faq details {
  border-top: 1px solid var(--wire);
}

.faq details:last-child {
  border-bottom: 1px solid var(--wire);
}

.faq summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  padding: 1rem 1.75rem 1rem 0;
  position: relative;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 1rem;
  font-family: var(--font-mono);
  color: var(--signal);
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  margin: 0 0 1.1rem;
  color: var(--muted);
  max-width: 42rem;
}

/* Support strip */
.support {
  background: var(--panel);
  border: 1px solid var(--wire);
  padding: 1.5rem 1.35rem;
}

.support p {
  margin: 0 0 0.65rem;
  color: var(--muted);
}

.support p:last-child {
  margin-bottom: 0;
}

/* Article / legal prose */
.article__head {
  padding: clamp(2.5rem, 6vw, 4rem) 0 1.5rem;
  border-bottom: 1px solid var(--wire);
}

.article__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.article__meta b {
  color: var(--signal);
  font-weight: 500;
}

.prose {
  max-width: 42rem;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1.15rem;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
  color: var(--muted);
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose li::marker {
  color: var(--signal);
}

.prose h2 {
  margin-top: 2rem;
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
}

.note {
  border-left: 2px solid var(--warn);
  padding: 0.35rem 0 0.35rem 1rem;
  color: var(--muted);
  margin: 1.25rem 0;
}

/* Contact */
.contact-desk {
  display: grid;
  gap: 1rem;
  max-width: 36rem;
}

.contact-line {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 0.75rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--wire);
  font-size: 0.98rem;
}

.contact-line dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 0.2rem;
}

.contact-line dd {
  margin: 0;
}

/* 404 */
.err {
  padding: clamp(4rem, 12vw, 7rem) 0;
  max-width: 34rem;
}

.err h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 0 0 0.75rem;
}

.err p {
  color: var(--muted);
}

.err ul {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.err li {
  border-top: 1px solid var(--wire);
}

.err a {
  display: block;
  padding: 0.85rem 0;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
}

.err a:hover {
  color: var(--signal);
}

/* Footer */
.foot {
  border-top: 1px solid var(--wire);
  padding: 2rem 0 2.75rem;
  margin-top: 2rem;
}

.foot__grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  justify-content: space-between;
}

.foot nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.1rem;
}

.foot a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--muted);
}

.foot a:hover {
  color: var(--signal);
}

.foot__note {
  margin: 1.25rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 40rem;
}

.foot__copy {
  margin: 0.85rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .wire-node {
    opacity: 1;
    transform: none;
  }

  .desk-progress {
    transition: none;
  }
}