/* ==========================================================================
   /technology — Project Phoenix architecture page.
   ========================================================================== */

.tech__hero {
  padding-block: clamp(var(--s-7), 10vw, var(--s-9)) var(--s-7);
  background:
    radial-gradient(60% 80% at 100% 0%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 70%),
    var(--surface-base);
  border-bottom: 1px solid var(--border);
}
.tech__h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
  letter-spacing: -0.04em;
  line-height: 1.0;
  margin: var(--s-3) 0 var(--s-3);
}
.tech__sub {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  color: var(--ink-secondary);
  margin: 0 0 var(--s-5);
  max-width: 56ch;
}
.tech__lead {
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
  line-height: 1.65;
  color: var(--ink-secondary);
  max-width: 70ch;
  margin: 0;
}

.tech__section,
.tech__architecture-section,
.tech__layers {
  padding-block: var(--s-8);
}
.tech__section-header {
  margin-bottom: var(--s-6);
  max-width: 60ch;
}
.tech__h2 {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  letter-spacing: -0.022em;
  margin: var(--s-2) 0 0;
}
.tech__intro {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  color: var(--ink-secondary);
  margin: var(--s-4) 0 0;
}
.tech__paragraph {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--ink-primary);
  max-width: 72ch;
  margin: 0;
}

/* ----- 4-layer Phoenix diagram ----- */
.phoenix-diagram {
  position: relative;
  width: 100%;
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  padding: var(--s-5);
  isolation: isolate;
  overflow: hidden;
}
.phoenix-diagram__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: multiply;
}
@media (prefers-color-scheme: dark) {
  .phoenix-diagram__canvas { mix-blend-mode: screen; opacity: 0.45; }
}
@media (prefers-reduced-motion: reduce) {
  .phoenix-diagram__canvas { display: none; }
}
.phoenix-diagram__layers {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}

.phoenix-layer {
  appearance: none;
  text-align: left;
  font: inherit;
  color: inherit;
  cursor: pointer;
  background: var(--surface-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-1);
  padding: var(--s-4) var(--s-5);
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: var(--s-4);
  align-items: baseline;
  transition: transform var(--t-base) var(--ease-out),
              border-color var(--t-base) var(--ease-out),
              box-shadow var(--t-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.phoenix-layer::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--ink-primary);
  transform: scaleY(0);
  transform-origin: bottom center;
  transition: transform var(--t-base) var(--ease-out);
}
.phoenix-layer:hover,
.phoenix-layer:focus-visible,
.phoenix-layer[aria-selected="true"] {
  border-color: var(--ink-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  outline: none;
}
.phoenix-layer:hover::before,
.phoenix-layer:focus-visible::before,
.phoenix-layer[aria-selected="true"]::before {
  transform: scaleY(1);
}
.phoenix-layer__no {
  font-size: 1rem;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
  font-weight: var(--weight-medium);
  grid-row: 1 / span 2;
  align-self: center;
  width: 2.5ch;
}
.phoenix-layer__name {
  font-family: var(--font-sans);
  font-weight: var(--weight-semibold);
  font-size: 1.125rem;
  letter-spacing: -0.012em;
  color: var(--ink-primary);
}
.phoenix-layer__sub {
  font-size: 0.8125rem;
  color: var(--ink-secondary);
  letter-spacing: 0;
  text-transform: none;
  margin-top: 4px;
}

/* ----- Layer description cards ----- */
.tech__layer-card {
  border-top: 1px solid var(--border);
  padding-block: var(--s-5);
  scroll-margin-top: calc(var(--header-h) + var(--s-4));
  max-width: 76ch;
}
.tech__layer-card:first-child { border-top: 0; }
.tech__layer-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.tech__layer-card .eyebrow { color: var(--ink-muted); }
.tech__layer-title {
  font-size: 1.5rem;
  letter-spacing: -0.018em;
  margin: var(--s-2) 0 var(--s-3);
}
.tech__layer-card p {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink-primary);
  max-width: 70ch;
  margin: 0;
}

/* ----- Vendors strip ----- */
.tech__vendors {
  list-style: none;
  margin: var(--s-5) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  font-size: var(--fs-small);
  color: var(--ink-muted);
}
.tech__vendors li {
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-1);
  background: var(--surface-elevated);
}

/* ----- Out-of-scope list: compact “spec” stack.
   Do not set white-space: pre-wrap on this container — newlines between block
   children become huge gaps. Groups are block stacks; lead/epilog are blocks. ----- */
.tech__terminal {
  display: block;
  max-width: 88ch;
}
.tech__terminal > .terminal__line--meta:first-child {
  margin-bottom: var(--s-3);
}
.tech__terminal > .terminal__line--meta:last-child {
  margin-top: var(--s-3);
  margin-bottom: 0;
}
.tech__terminal .terminal__group {
  display: block;
  margin-bottom: var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--border);
}
.tech__terminal .terminal__group .terminal__line--indented {
  margin-top: 0.15rem;
}
.tech__terminal .terminal__group:last-of-type {
  margin-bottom: var(--s-3);
  padding-bottom: 0;
  border-bottom: none;
}
.tech__terminal .terminal__line--meta {
  color: var(--ink-muted);
}
.tech__terminal .terminal__line--indented {
  padding-left: 2.75rem;
}

/* ----- IP grid ----- */
.tech__ip-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  margin: var(--s-6) 0 0;
}
@media (min-width: 768px) {
  .tech__ip-grid { grid-template-columns: repeat(4, 1fr); }
}
.tech__ip-grid > div {
  border-top: 1px solid var(--border);
  padding-top: var(--s-3);
}
.tech__ip-grid dt {
  font-size: var(--fs-micro);
  text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow);
  color: var(--ink-muted);
  margin: 0 0 var(--s-2);
}
.tech__ip-grid dd {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: var(--weight-medium);
  color: var(--ink-primary);
}

/* ----- Tier 1 / Tier 2 vs Threat Layers chart -------------------------- */
.tech__tiers {
  padding-block: var(--s-8);
}
.tech__tier-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  align-items: stretch;
}
@media (min-width: 880px) {
  .tech__tier-grid {
    grid-template-columns: minmax(0, 1fr) 220px;
    grid-template-rows: auto auto auto;
    grid-template-areas:
      "tier2  threats"
      "anchor threats"
      "tier1  threats";
    gap: var(--s-3) var(--s-5);
  }
  .tech__tier--two     { grid-area: tier2; }
  .tech__tier-anchor   { grid-area: anchor; }
  .tech__tier--one     { grid-area: tier1; }
  .tech__threat-stack  { grid-area: threats; }
}
.tech__tier {
  border: 1px solid var(--border);
  padding: var(--s-5);
  background: var(--surface-base);
}
.tech__tier--two {
  background: var(--surface-inverse);
  color: var(--ink-on-inverse);
  border-color: var(--surface-inverse);
}
.tech__tier--two .tech__tier-eyebrow { color: var(--ink-on-inverse-muted); }
.tech__tier--two .tech__tier-scope   { color: var(--ink-on-inverse-soft); }
.tech__tier--two .tech__tier-title   { color: var(--ink-on-inverse); }
.tech__tier--two .tech__tier-list li { color: var(--ink-on-inverse-soft); }
.tech__tier--two .tech__tier-list li::before { background: var(--ink-on-inverse-faint); }
.tech__tier-eyebrow {
  margin: 0 0 var(--s-2);
}
.tech__tier-title {
  font-family: var(--font-sans);
  font-size: 1.375rem;
  letter-spacing: -0.018em;
  margin: 0 0 var(--s-2);
  font-weight: var(--weight-semibold);
}
.tech__tier-scope {
  font-size: var(--fs-small);
  color: var(--ink-secondary);
  font-style: italic;
  margin: 0 0 var(--s-4);
}
.tech__tier-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.5;
}
.tech__tier-list li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--ink-primary);
}
.tech__tier-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  background: var(--ink-faint);
}
.tech__tier-anchor {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: var(--fs-micro);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--ink-muted);
  padding: var(--s-2) 0;
}
.tech__tier-anchor-arrow {
  font-size: 1rem;
  color: var(--ink-faint);
}
.tech__threat-stack {
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  padding: var(--s-4);
  display: flex;
  flex-direction: column;
}
.tech__threat-stack-label {
  margin: 0 0 var(--s-3);
}
.tech__threat-stack-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}
.tech__threat {
  display: grid;
  grid-template-columns: 2.5ch 1fr;
  align-items: center;
  gap: var(--s-3);
  padding: 0.5rem 0.75rem;
  background: var(--surface-base);
  border: 1px solid var(--border);
  font-size: 0.875rem;
}
.tech__threat--tier-two {
  border-color: var(--surface-inverse);
  background: color-mix(in srgb, var(--surface-inverse) 8%, var(--surface-base));
}
.tech__threat-no {
  color: var(--ink-muted);
  font-weight: var(--weight-medium);
}
.tech__threat--tier-two .tech__threat-no { color: var(--ink-primary); }
.tech__threat-name {
  color: var(--ink-secondary);
}

/* ----- NDA full-bleed callout ----- */
.tech__nda {
  background: var(--surface-inverse);
  color: var(--ink-on-inverse);
  padding-block: clamp(var(--s-7), 10vw, var(--s-9));
  position: relative;
  overflow: hidden;
}
.tech__nda::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      135deg,
      transparent 0 31px,
      rgba(255,255,255,0.025) 31px 32px
    );
  pointer-events: none;
}
.tech__nda-eyebrow { color: var(--ink-on-inverse-muted); }
.tech__nda-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.625rem, 3vw, 2.5rem);
  font-weight: var(--weight-regular);
  line-height: 1.3;
  color: var(--ink-on-inverse);
  letter-spacing: -0.012em;
  max-width: 30ch;
  margin: var(--s-3) 0 var(--s-4);
}
.tech__nda-body {
  font-size: 1.125rem;
  color: var(--ink-on-inverse-soft);
  max-width: 64ch;
  margin: 0 0 var(--s-5);
  line-height: 1.6;
}