:root,
body[data-palette="obsidian-plasma"] {
  --bg-void: #030207;
  --bg-deep: #080511;
  --bg-panel: rgba(11, 9, 19, 0.82);
  --bg-panel-strong: rgba(15, 11, 28, 0.92);
  --bg-rail: rgba(9, 7, 17, 0.94);
  --text-main: #f7f4ff;
  --text-soft: #c8c0e4;
  --text-dim: #9187b6;
  --line-soft: rgba(181, 139, 255, 0.18);
  --line-strong: rgba(214, 174, 255, 0.34);
  --signal-core: #f0deff;
  --signal-mid: #c878ff;
  --signal-glow: #6f23ff;
  --ember-core: #fff0c4;
  --ember-mid: #ffb347;
  --ember-glow: #ff5f1f;
  --ice-core: #f5fcff;
  --ice-mid: #b9d2ff;
  --success-core: #ccffd7;
  --success-glow: #2adf78;
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --content-width: 1500px;
  --shadow-near: 0 18px 42px rgba(0, 0, 0, 0.34);
  --shadow-far: 0 0 70px rgba(92, 24, 255, 0.14);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at 14% 18%, rgba(126, 48, 255, 0.2), transparent 28%),
    radial-gradient(circle at 87% 22%, rgba(255, 111, 28, 0.16), transparent 26%),
    radial-gradient(circle at 68% 82%, rgba(92, 137, 255, 0.12), transparent 24%),
    linear-gradient(160deg, #010104 0%, #07040c 40%, #020108 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.22;
  mask-image: radial-gradient(circle at center, black 48%, transparent 92%);
}

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

button,
input,
textarea {
  font: inherit;
}

.shell {
  position: relative;
  padding: 28px;
}

.masthead {
  width: min(100%, var(--content-width));
  margin: 0 auto 18px;
  padding: 20px 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.04), transparent 30%),
    rgba(8, 6, 17, 0.8);
  box-shadow: var(--shadow-near), var(--shadow-far);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.eyebrow,
.panel-label,
.rail-label,
.artifact-gate,
.proof-status,
.meta-label,
.signal-key {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.brand-cluster,
.brand-row,
.masthead-actions,
.hero-actions,
.hero-notes,
.action-stack,
.cta-stack,
.result-header,
.result-split,
.final-actions,
.contact-actions,
.contact-meta {
  display: flex;
}

.brand-cluster {
  flex-direction: column;
  gap: 8px;
}

.brand-row {
  align-items: center;
  gap: 12px;
}

.brand-mark {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--signal-core);
  text-shadow: 0 0 12px rgba(164, 87, 255, 0.38);
}

.brand-state {
  padding: 7px 12px;
  border: 1px solid rgba(255, 177, 93, 0.28);
  border-radius: 999px;
  background: rgba(255, 100, 20, 0.08);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  color: var(--ember-core);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.masthead-actions,
.hero-actions,
.hero-notes,
.action-stack,
.cta-stack,
.final-actions,
.contact-actions,
.contact-meta {
  gap: 12px;
  flex-wrap: wrap;
}

.ghost-link,
.primary-link,
.cta,
.stack-action,
.choice-button {
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.ghost-link,
.primary-link,
.stack-action,
.cta {
  padding: 10px 14px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ghost-link:hover,
.primary-link:hover,
.cta:hover,
.stack-action:hover,
.choice-button:hover {
  transform: translateY(-1px);
}

.primary-link,
.cta-primary,
.stack-primary {
  border-color: rgba(255, 177, 93, 0.42);
  background: linear-gradient(135deg, rgba(255, 128, 42, 0.18), rgba(255, 168, 59, 0.08));
  color: var(--ember-core);
  box-shadow: 0 0 18px rgba(255, 96, 20, 0.14);
}

.ghost-link:hover,
.stack-action:hover,
.cta-secondary:hover {
  border-color: var(--line-strong);
}

.frame {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 18px;
}

.rail {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 20px;
  align-self: start;
}

.rail-card,
.section-panel,
.question-panel,
.result-panel,
.artifact-card,
.tier-card,
.method-card,
.proof-card,
.signal-card,
.contact-card,
.diagnosis-card {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.03), transparent 30%),
    var(--bg-panel);
  box-shadow: var(--shadow-near);
}

.rail-card {
  padding: 18px;
  background:
    radial-gradient(circle at top left, rgba(122, 44, 255, 0.12), transparent 42%),
    var(--bg-rail);
}

.rail-card h2,
.section-heading h2,
.hero h1,
.result-header h3,
.artifact-card h3,
.tier-card h3,
.method-card h3,
.proof-card h3,
.contact-card h2,
.diagnosis-card h2 {
  margin: 0;
}

.rail-card h2,
.contact-card h2,
.diagnosis-card h2 {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.rail-card p,
.rail-card li,
.section-heading p,
.hero-summary,
.question-header p,
.artifact-card p,
.tier-card p,
.method-card p,
.proof-card p,
.final-copy p,
.contact-card p,
.diagnosis-card p,
.meta-block p,
.mini-panel li {
  color: var(--text-soft);
  line-height: 1.6;
}

.world-map,
.state-list,
.conversion-grid,
.choice-grid,
.artifact-grid,
.tier-grid,
.method-grid,
.proof-grid,
.signal-grid,
.contact-grid {
  display: grid;
}

.world-map {
  gap: 10px;
  padding-left: 18px;
  margin: 14px 0 0;
}

.world-map a {
  color: var(--ice-core);
}

.state-list {
  list-style: none;
  gap: 12px;
  margin: 14px 0 0;
  padding: 0;
}

.state-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-right: 8px;
}

.state-unresolved {
  color: var(--signal-core);
  border-color: rgba(176, 119, 255, 0.32);
  background: rgba(122, 56, 255, 0.12);
}

.state-narrowing {
  color: var(--ice-core);
  border-color: rgba(135, 174, 255, 0.34);
  background: rgba(88, 131, 255, 0.1);
}

.state-diagnosed {
  color: var(--ember-core);
  border-color: rgba(255, 177, 93, 0.34);
  background: rgba(255, 107, 28, 0.1);
}

.state-ready {
  color: var(--success-core);
  border-color: rgba(42, 223, 120, 0.34);
  background: rgba(42, 223, 120, 0.1);
}

.surface {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.section-panel,
.hero,
.final-panel,
.contact-card,
.diagnosis-card {
  padding: 28px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.95fr;
  gap: 22px;
  align-items: stretch;
}

.hero h1 {
  font-size: clamp(2.35rem, 5vw, 4.35rem);
  line-height: 1.05;
  margin-bottom: 16px;
}

.hero-summary {
  font-size: 1.08rem;
  max-width: 56ch;
  margin-bottom: 18px;
}

.hero-notes span {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.signal-card {
  padding: 20px;
  background:
    radial-gradient(circle at top right, rgba(255, 111, 28, 0.08), transparent 40%),
    linear-gradient(180deg, rgba(12, 10, 22, 0.96), rgba(7, 5, 15, 0.96));
}

.signal-grid,
.contact-grid {
  gap: 14px;
}

.signal-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 0.98rem;
  line-height: 1.5;
}

.section-heading {
  margin-bottom: 22px;
}

/* Domain range panel — v3 §8 */
#domain-range {
  padding: 32px 0;
}

.domain-range-panel {
  padding: 28px 32px;
  border: 1px solid rgba(164, 87, 255, 0.25);
  border-radius: var(--radius-md);
  background: rgba(11, 8, 21, 0.7);
}

.domain-range-headline {
  margin: 0 0 14px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(164, 87, 255, 0.85);
}

.domain-range-body {
  margin: 0 0 12px;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--text-soft);
}

.domain-range-close {
  margin: 0;
  font-size: 0.92rem;
  font-style: italic;
  color: var(--text-dim);
}

.section-heading h2 {
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  margin: 10px 0 12px;
}

.conversion-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.conversion-card,
.tier-card,
.artifact-card,
.method-card,
.proof-card,
.contact-subcard {
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(11, 8, 21, 0.7);
}

.conversion-state {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px solid rgba(135, 174, 255, 0.26);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--ice-core);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.conversion-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.06rem;
}

.diagnostic-section .progress-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.progress-step {
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.progress-step.active {
  color: var(--ember-core);
  border-color: rgba(255, 177, 93, 0.34);
}

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.95fr);
  gap: 18px;
}

.question-stack {
  display: grid;
  gap: 16px;
}

.question-panel,
.result-panel {
  padding: 20px;
  background: var(--bg-panel-strong);
}

.question-header h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.choice-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.choice-button {
  width: 100%;
  padding: 14px 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(11, 8, 21, 0.72);
  color: var(--text-soft);
  text-align: left;
}

.choice-button.selected,
.artifact-card.active,
.tier-card.active {
  border-color: rgba(255, 177, 93, 0.4);
  background: linear-gradient(140deg, rgba(255, 108, 28, 0.16), rgba(122, 44, 255, 0.16));
  box-shadow: 0 0 28px rgba(164, 87, 255, 0.16);
}

.result-panel {
  position: sticky;
  top: 20px;
  align-self: start;
}

.result-header {
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
}

.result-header h3 {
  font-size: 1.4rem;
}

.result-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.meta-block,
.mini-panel {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(8, 6, 17, 0.82);
  padding: 14px;
}

.meta-block {
  flex-direction: column;
  gap: 8px;
}

.meta-block strong {
  font-size: 1rem;
}

.meta-wide {
  grid-column: 1 / -1;
}

.result-split {
  gap: 12px;
  margin-top: 12px;
}

.result-split > * {
  flex: 1;
}

.mini-panel ul,
.artifact-card ul {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--text-soft);
}

.support-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.support-chip {
  padding: 8px 10px;
  border: 1px solid rgba(135, 174, 255, 0.28);
  border-radius: 999px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--ice-core);
  background: rgba(83, 129, 255, 0.08);
  letter-spacing: 0.05em;
}

.session-note {
  margin: 12px 0 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.artifact-grid,
.tier-grid,
.method-grid,
.proof-grid {
  gap: 16px;
}

.artifact-grid,
.tier-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.method-grid,
.proof-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.proof-status {
  display: inline-block;
  margin-bottom: 10px;
}

.final-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.final-copy {
  max-width: 65ch;
}

.contact-shell {
  width: min(100%, 1080px);
  margin: 0 auto;
  display: grid;
  gap: 18px;
}

.contact-grid {
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.9fr);
}

.contact-card,
.diagnosis-card {
  background: var(--bg-panel-strong);
}

.contact-meta .state-pill {
  margin-right: 0;
}

.diagnosis-card .meta-block {
  margin-top: 12px;
}

.contact-form {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field label,
.field legend {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(5, 4, 12, 0.86);
  color: var(--text-main);
  padding: 14px 16px;
}

.field textarea {
  min-height: 220px;
  resize: vertical;
  line-height: 1.55;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: rgba(255, 177, 93, 0.44);
  box-shadow: 0 0 0 3px rgba(255, 107, 28, 0.08);
}

.contact-form .trap {
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

.contact-note {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.contact-subcards {
  display: grid;
  gap: 14px;
}

.contact-subcard h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

@media (max-width: 1180px) {
  .frame,
  .contact-grid,
  .workbench,
  .hero,
  .method-grid,
  .proof-grid {
    grid-template-columns: 1fr;
  }

  .rail,
  .result-panel {
    position: static;
  }
}

@media (max-width: 760px) {
  .shell {
    padding: 16px;
  }

  .masthead,
  .section-panel,
  .hero,
  .contact-card,
  .diagnosis-card {
    padding: 18px;
  }

  .masthead-actions {
    width: 100%;
  }

  .frame {
    gap: 16px;
  }

  .artifact-grid,
  .tier-grid,
  .conversion-grid,
  .choice-grid,
  .result-meta {
    grid-template-columns: 1fr;
  }

  .result-split,
  .final-panel {
    flex-direction: column;
  }

  .hero h1,
  .section-heading h2 {
    font-size: clamp(1.8rem, 8vw, 2.6rem);
  }
}