/* PARALLAX (prlx) — Observatory Design System (DS 2.5.0 Wizard Rules)
 * Self-contained stylesheet for goparallax.dev (public landing) and goparallax.app (operator shell).
 * Zero external runtime dependencies.
 */

:root {
  --bg: #080b10;
  --surface: #0e131b;
  --surface-elevated: #141b26;
  --surface-hover: #1b2433;
  --border: #222d3f;
  --border-subtle: #18202d;
  --text: #eef2f7;
  --text-muted: #93a1b5;
  --text-dim: #64748b;

  /* Sightline Semantic Accents (never conveyed by color alone) */
  --cyan: #22d3ee;
  --cyan-bg: rgba(34, 211, 238, 0.11);
  --cyan-border: rgba(34, 211, 238, 0.35);

  --amber: #fbbf24;
  --amber-bg: rgba(251, 191, 36, 0.12);
  --amber-border: rgba(251, 191, 36, 0.42);

  --emerald: #34d399;
  --emerald-bg: rgba(52, 211, 153, 0.11);
  --emerald-border: rgba(52, 211, 153, 0.35);

  --font-sans: "Schibsted Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

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

html {
  color-scheme: dark;
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-block-size: 100dvh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at 18% 0%, rgba(34, 211, 238, 0.06), transparent 38%),
    radial-gradient(circle at 82% 0%, rgba(251, 191, 36, 0.05), transparent 38%),
    var(--bg);
}

/* 72px Shared Header Shell (DS 2.5.0) */
.site-header {
  min-block-size: 72px;
  padding-inline: 1.5rem;
  padding-block: 0.75rem;
  border-block-end: 1px solid var(--border);
  background-color: rgba(14, 19, 27, 0.92);
  backdrop-filter: blur(10px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand-cluster {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.brand-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.brand-name {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand-subtitle {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Badges & Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.2;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  border: 1px solid var(--border);
  background-color: var(--surface-elevated);
  color: var(--text-muted);
  white-space: nowrap;
}

.badge-cyan {
  color: var(--cyan);
  background-color: var(--cyan-bg);
  border-color: var(--cyan-border);
}

.badge-amber {
  color: var(--amber);
  background-color: var(--amber-bg);
  border-color: var(--amber-border);
}

.badge-emerald {
  color: var(--emerald);
  background-color: var(--emerald-bg);
  border-color: var(--emerald-border);
}

/* Buttons & Links */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background-color: var(--surface-elevated);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn:hover:not(:disabled) {
  background-color: var(--surface-hover);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-cyan {
  color: var(--cyan);
  background-color: var(--cyan-bg);
  border-color: var(--cyan-border);
}

.btn-cyan:hover:not(:disabled) {
  background-color: rgba(34, 211, 238, 0.2);
}

.btn-amber {
  color: var(--amber);
  background-color: var(--amber-bg);
  border-color: var(--amber-border);
}

.btn-amber:hover:not(:disabled) {
  background-color: rgba(251, 191, 36, 0.22);
}

.btn-amber-solid {
  color: #080b10;
  background-color: var(--amber);
  border-color: var(--amber);
}

.btn-amber-solid:hover:not(:disabled) {
  background-color: #fcd34d;
}

/* Layout B Wizard Grid */
.wizard-shell {
  flex: 1;
  width: 100%;
  max-inline-size: 74rem;
  margin-inline: auto;
  padding: 1.25rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 820px) {
  .wizard-shell {
    grid-template-columns: 17.5rem 1fr;
    align-items: start;
  }
}

.rail-column {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
}

.rail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: 0.5rem;
  padding-block-end: 0.625rem;
  margin-block-end: 0.625rem;
  border-block-end: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

/* Tablist & Tabs (modern-web-guidance compliant) */
[role="tablist"] {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

[role="tab"] {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
}

[role="tab"]:hover {
  background-color: var(--surface-elevated);
  color: var(--text);
}

[role="tab"][aria-selected="true"] {
  background-color: var(--surface-elevated);
  color: var(--text);
}

/* MANDATORY non-color indicator via border on pseudo-element */
[role="tab"][aria-selected="true"]::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  border-inline-start: 3px solid var(--cyan);
}

.tab-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

[role="tab"][aria-selected="true"] .tab-code {
  color: var(--cyan);
}

/* Right Stage Card & Panel Stack */
.stage-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-block-size: 29rem;
}

/* Keep hidden="until-found" panels in one grid cell so hidden panels take zero gap */
.panel-stack {
  display: grid;
  grid-template-columns: 1fr;
}

.panel-stack > [role="tabpanel"] {
  grid-area: 1 / 1;
}

.panel-inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.panel-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  padding-block-end: 1rem;
  border-block-end: 1px solid var(--border);
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.eyebrow-amber {
  color: var(--amber);
}

.eyebrow-emerald {
  color: var(--emerald);
}

.stage-title {
  margin: 0.25rem 0 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.25;
}

.bottom-line {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text);
}

/* Grids inside panels */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.875rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.75rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
  gap: 0.625rem;
}

.subcard {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.875rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.subcard-cyan {
  border-color: var(--cyan-border);
}

.subcard-amber {
  border-color: var(--amber-border);
}

.subcard-emerald {
  border-color: var(--emerald-border);
}

.subcard-kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.subcard-title {
  font-size: 0.9375rem;
  font-weight: 700;
  margin: 0;
}

.subcard-body {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.terminal-box {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--surface-elevated);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

/* Native <details> & <summary> disclosures (modern-web-guidance accordion rules) */
details.disclosure {
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.875rem;
  font-size: 0.75rem;
}

details.disclosure > summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5ch;
  cursor: pointer;
  user-select: none;
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text);
}

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

details.disclosure > summary::before {
  content: "";
  inline-size: 0.95em;
  block-size: 0.95em;
  flex-shrink: 0;
  background-color: currentColor;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='currentColor'%3E%3Cpath fill-rule='evenodd' d='M5.23 7.21a.75.75 0 011.06.02L10 11.168l3.71-3.938a.75.75 0 111.08 1.04l-4.25 4.5a.75.75 0 01-1.08 0l-4.25-4.5a.75.75 0 01.02-1.06z' clip-rule='evenodd'/%3E%3C/svg%3E") no-repeat center / contain;
  rotate: -90deg;
}

details.disclosure[open] > summary::before {
  rotate: 0deg;
}

.disclosure-body {
  padding-block-start: 0.75rem;
  margin-block-start: 0.75rem;
  border-block-start: 1px solid var(--border);
  color: var(--text-muted);
  line-height: 1.55;
}

@media (prefers-reduced-motion: no-preference) {
  details.disclosure > summary::before {
    transition: rotate 0.2s ease;
  }
  details.disclosure::details-content {
    interpolate-size: allow-keywords;
    overflow: clip;
    contain: layout;
    transition: block-size 0.25s ease-in-out, content-visibility 0.25s ease-in-out, display 0.25s ease-in-out;
    transition-behavior: allow-discrete;
  }
}

details.disclosure:not([open])::details-content {
  block-size: 0;
}

/* Wizard Step Footer Bar */
.wizard-footer {
  margin-block-start: 1.5rem;
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.footer-credit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* Native <dialog> Modal */
dialog.gate-modal {
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--amber-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-inline-size: 34rem;
  width: calc(100% - 2rem);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.75);
}

dialog.gate-modal::backdrop {
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding-block: 0.25rem;
}

.text-cyan { color: var(--cyan); }
.text-amber { color: var(--amber); }
.text-emerald { color: var(--emerald); }
.text-muted { color: var(--text-muted); }