/* Conduit — industrial signage for a protocol boundary.
   The design inverts the usual error styling: a refusal is the product
   working, so refusals get the boldest treatment on the page and successful
   calls stay quiet. */

:root {
  --ink:        #16181a;
  --ink-soft:   #4a4f55;
  --ink-faint:  #878d94;
  --concrete:   #e3e1dc;
  --concrete-d: #cfccc5;
  --paper:      #f6f5f2;
  --signal:     #1b4fd8;
  --hazard:     #e4a11b;
  --hazard-d:   #8a5d00;

  --rail-w: 2px;
  --gap: clamp(1.5rem, 4vw, 3rem);
  --measure: 68ch;

  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--concrete);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.6;
  font-variant-ligatures: none;
}

.wrap {
  width: min(1180px, 100% - 2.5rem);
  margin-inline: auto;
}

a { color: var(--signal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--ink); }

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

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--concrete-d);
  padding: 0.1em 0.35em;
}

/* --- Masthead ----------------------------------------------------------- */

.masthead {
  border-bottom: var(--rail-w) solid var(--ink);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
}

.masthead-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 52px;
  flex-wrap: wrap;
}

.wordmark {
  font-family: var(--display);
  font-variation-settings: "wdth" 118, "wght" 700;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.wordmark-rail {
  width: 10px;
  height: 18px;
  background: var(--hazard);
  border-left: var(--rail-w) solid var(--ink);
  border-right: var(--rail-w) solid var(--ink);
}

.masthead-links {
  display: flex;
  gap: 1.4rem;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.masthead-links a { color: var(--ink-soft); text-decoration: none; }
.masthead-links a:hover { color: var(--signal); text-decoration: underline; }

/* --- Hero --------------------------------------------------------------- */

.hero {
  padding: clamp(2.5rem, 7vw, 5.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  border-bottom: var(--rail-w) solid var(--ink);
}

.eyebrow {
  margin: 0 0 1.4rem;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 2.2rem;
  height: var(--rail-w);
  background: var(--ink);
  vertical-align: middle;
  margin-right: 0.8rem;
}

.hero-title {
  font-family: var(--display);
  font-variation-settings: "wdth" 112, "wght" 800;
  font-size: clamp(2.6rem, 9vw, 6.2rem);
  line-height: 0.94;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 0 0 1.6rem;
  max-width: 15ch;
}

/* Sized to the cap height rather than the em box, so the block hugs the word
   instead of floating below it. */
.hero-title em {
  font-style: normal;
  color: var(--hazard-d);
  background-image: linear-gradient(var(--hazard), var(--hazard));
  background-repeat: no-repeat;
  background-size: 100% 0.82em;
  background-position: 0 0.1em;
}

.hero-lede {
  margin: 0 0 2.6rem;
  max-width: var(--measure);
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* --- Discovered tools --------------------------------------------------- */

.discovery-label {
  margin: 0 0 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.discovery-note {
  display: inline-block;
  margin-left: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--ink-faint);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.chip {
  border: var(--rail-w) solid var(--ink);
  background: var(--paper);
  padding: 0.3rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 3px 3px 0 var(--ink);
}

.chip-resource { background: var(--signal); color: #fff; }
.chip-loading, .chip-offline {
  border-style: dashed;
  box-shadow: none;
  background: transparent;
  color: var(--ink-faint);
  font-weight: 400;
}

/* --- Console layout ----------------------------------------------------- */

.console { padding: clamp(2rem, 5vw, 3.5rem) 0; }

.console-grid {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
}

.panel-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--display);
  font-variation-settings: "wdth" 108, "wght" 700;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 0 0 1.2rem;
}

.panel-rule {
  width: 1.6rem;
  height: 0.65rem;
  background: var(--ink);
  flex: none;
}

/* --- Presets ------------------------------------------------------------ */

.presets {
  list-style: none;
  margin: 0 0 1.8rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.preset {
  width: 100%;
  text-align: left;
  font: inherit;
  cursor: pointer;
  background: var(--paper);
  border: var(--rail-w) solid var(--ink);
  padding: 0.7rem 0.85rem;
  display: block;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.preset:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--ink); }
.preset[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.preset[aria-pressed="true"] .preset-caption { color: var(--concrete-d); }

.preset-caption {
  display: block;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--ink-soft);
}

.preset-tag {
  display: block;
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 0.25rem;
}

.preset-security { border-color: var(--hazard-d); background: var(--hazard); }
.preset-security .preset-caption,
.preset-security .preset-tag { color: var(--hazard-d); }
.preset-security:hover { box-shadow: 4px 4px 0 var(--hazard-d); }
.preset-security[aria-pressed="true"] { background: var(--ink); }
.preset-security[aria-pressed="true"] .preset-caption { color: var(--hazard); }
.preset-security[aria-pressed="true"] .preset-tag { color: var(--hazard); }

/* --- Free-form ask ------------------------------------------------------ */

.freeform {
  border-top: var(--rail-w) solid var(--ink);
  padding-top: 1.2rem;
}

.freeform-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.55rem;
}

.freeform textarea {
  width: 100%;
  font: inherit;
  font-size: 0.88rem;
  padding: 0.6rem 0.7rem;
  border: var(--rail-w) solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  resize: vertical;
}

.freeform textarea::placeholder { color: var(--ink-faint); }

.freeform button {
  margin-top: 0.6rem;
  width: 100%;
  font: inherit;
  cursor: pointer;
  background: var(--signal);
  color: #fff;
  border: var(--rail-w) solid var(--ink);
  padding: 0.55rem 0.8rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.freeform button:hover:not(:disabled) { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--ink); }
.freeform button:disabled { background: var(--concrete-d); color: var(--ink-faint); cursor: not-allowed; }

.btn-label { font-weight: 600; letter-spacing: 0.04em; }
.btn-meta { font-size: 0.7rem; opacity: 0.8; }

.freeform-note {
  margin: 0.7rem 0 0;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--ink-faint);
}

.freeform-note.is-warning { color: var(--hazard-d); }

/* --- Stage / trace ------------------------------------------------------ */

.stage { min-width: 0; }

.stage-badge {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  padding: 0.15rem 0.5rem;
  border: var(--rail-w) solid var(--ink);
  background: var(--paper);
}

.stage-badge[data-kind="live"] { background: var(--signal); color: #fff; border-color: var(--signal); }

.trace {
  border: var(--rail-w) solid var(--ink);
  background: var(--paper);
  padding: clamp(1rem, 3vw, 1.8rem);
  min-height: 22rem;
}

.empty { color: var(--ink-soft); max-width: 46ch; }
.empty p { margin: 0 0 0.7rem; font-size: 0.88rem; }
.empty-title {
  font-family: var(--display);
  font-variation-settings: "wdth" 100, "wght" 600;
  color: var(--ink);
  font-size: 1rem;
}

.question {
  margin: 0 0 1.5rem;
  padding-left: 1rem;
  border-left: 4px solid var(--ink);
  font-size: 0.95rem;
  font-weight: 500;
}

/* The rail: the conduit itself. Steps are nodes on it. */
.rail {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.6rem;
  position: relative;
}

.rail::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.4rem;
  bottom: 0.4rem;
  width: var(--rail-w);
  background: var(--ink);
}

/* Past the first refusal the conduit reads as dead line, not live line. */
.rail.is-severed .step-refused ~ .step::before { background: var(--ink-faint); }

.step {
  position: relative;
  padding: 0 0 1.1rem;
  animation: drop 0.28s cubic-bezier(0.2, 0.8, 0.3, 1) both;
}

.step::before {
  content: "";
  position: absolute;
  left: -1.6rem;
  top: 0.45rem;
  width: 0.75rem;
  height: 0.75rem;
  background: var(--signal);
  outline: var(--rail-w) solid var(--paper);
}

.step-refused::before { background: var(--hazard); }

@keyframes drop {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: none; }
}

.step-head {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.step-n {
  font-size: 0.7rem;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

.step-call {
  font-size: 0.88rem;
  font-weight: 500;
  word-break: break-word;
}

.step-call .arg-k { color: var(--ink-faint); }
.step-call .arg-v { color: var(--signal); }

.step-status {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--ink-faint);
  color: var(--ink-faint);
}

.step-body { margin-top: 0.5rem; }

.step-out {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--concrete);
  border-left: var(--rail-w) solid var(--concrete-d);
  padding: 0.5rem 0.7rem;
  max-height: 11rem;
  overflow: auto;
  color: var(--ink-soft);
}

.step-toggle {
  font: inherit;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: none;
  border: 0;
  padding: 0.25rem 0;
  color: var(--ink-faint);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.step-toggle:hover { color: var(--signal); }

/* The signature moment: the boundary cutting the conduit. The negative inset
   pulls the block back over the rail so the hazard bar physically severs it,
   rather than sitting politely alongside. */
.barrier {
  margin-top: 0.6rem;
  margin-left: calc(-1.6rem - var(--rail-w));
  border: var(--rail-w) solid var(--ink);
  background: var(--paper);
  box-shadow: 4px 4px 0 rgba(22, 24, 26, 0.14);
  animation: slam 0.3s cubic-bezier(0.2, 0.9, 0.3, 1) both;
}

@keyframes slam {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: none; }
}

.barrier-bar {
  height: 0.85rem;
  background: repeating-linear-gradient(
    -45deg, var(--hazard) 0 8px, var(--ink) 8px 16px
  );
  border-bottom: var(--rail-w) solid var(--ink);
}

.barrier-body { padding: 0.7rem 0.85rem; }

.barrier-title {
  font-family: var(--display);
  font-variation-settings: "wdth" 108, "wght" 700;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 0.35rem;
}

.barrier-detail {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
  word-break: break-word;
}

.barrier-proof { font-size: 0.75rem; }

.answer {
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: var(--rail-w) solid var(--ink);
}

.answer-label {
  font-family: var(--display);
  font-variation-settings: "wdth" 108, "wght" 700;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 0.5rem;
}

.answer-text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.65;
  white-space: pre-wrap;
}

.answer-check {
  margin: 0.8rem 0 0;
  font-size: 0.76rem;
  color: var(--ink-soft);
}

.answer-check b { font-weight: 600; color: var(--ink); }

.notice {
  border: var(--rail-w) solid var(--hazard-d);
  background: var(--hazard);
  color: var(--hazard-d);
  padding: 0.7rem 0.9rem;
  font-size: 0.85rem;
  margin-top: 1rem;
}

.working {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding: 0.4rem 0;
}

.working-dot {
  width: 0.55rem;
  height: 0.55rem;
  background: var(--signal);
  animation: pulse 1s steps(2, end) infinite;
}

@keyframes pulse { 50% { opacity: 0.25; } }

/* --- Boundaries --------------------------------------------------------- */

.boundaries {
  border-top: var(--rail-w) solid var(--ink);
  padding: clamp(2.5rem, 6vw, 4rem) 0;
}

.boundaries-lede {
  margin: 0 0 2rem;
  max-width: var(--measure);
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.boundary-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1px;
  background: var(--ink);
  border: var(--rail-w) solid var(--ink);
}

.boundary-list li { background: var(--paper); padding: 1.2rem 1.1rem; }

.boundary-list h3 {
  font-family: var(--display);
  font-variation-settings: "wdth" 106, "wght" 700;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 0.6rem;
}

.boundary-list p {
  margin: 0 0 0.8rem;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.boundary-list a { font-size: 0.78rem; }

/* --- Footer ------------------------------------------------------------- */

.footer {
  border-top: var(--rail-w) solid var(--ink);
  background: var(--paper);
  padding: 1.4rem 0;
}

.footer-inner p { margin: 0; font-size: 0.78rem; color: var(--ink-soft); }
.footer-meta { margin-top: 0.4rem !important; color: var(--ink-faint) !important; }

/* --- Responsive --------------------------------------------------------- */

@media (max-width: 860px) {
  .console-grid { grid-template-columns: 1fr; }
  .hero-title { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}