/* ============================================================================
   THE FORT — COMPONENTS
   Buttons, chips, header/nav, panels, tables, step rails, gates, terminal,
   hero, pillars, CTA band, footer, and signature set-piece scaffolding.
   ============================================================================ */

/* ===========================================================================
   BRAND MARK
   =========================================================================== */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 640;
  font-size: 1.05rem;
  letter-spacing: 0;
  text-decoration: none;
  color: var(--color-text);
}
.brand-mark {
  position: relative;
  width: 34px;
  height: 34px;
  flex: none;
  border: 0;
  border-radius: 9px;
  background: url("../assets/fort-icon.svg") center / contain no-repeat;
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.34));
  transition: transform var(--dur-slow) var(--ease-out),
              filter var(--dur-slow) var(--ease-out);
}
.brand-mark::after {
  content: "";
  display: none;
}
.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  transform: translateY(-1px) scale(1.04);
  filter: drop-shadow(0 12px 24px rgba(37, 99, 235, 0.34));
}

/* ===========================================================================
   HEADER / NAV
   =========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 11, 16, 0.72);
  backdrop-filter: blur(20px) saturate(1.16);
  -webkit-backdrop-filter: blur(20px) saturate(1.16);
  border-bottom: 1px solid var(--color-hairline);
  transition: background var(--dur-slow) var(--ease-out),
              border-color var(--dur-slow) var(--ease-out);
}
.site-header.is-scrolled {
  background: rgba(8, 11, 16, 0.92);
  border-bottom-color: var(--color-border);
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  min-height: var(--header-h);
  padding-block: var(--space-3);
  transition: min-height var(--dur-slow) var(--ease-out);
}
.site-header.is-scrolled .site-header__bar { min-height: 58px; }

.nav {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-4), 2vw, var(--space-6));
}
.nav a {
  position: relative;
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  text-decoration: none;
  padding-block: 6px;
  transition: color var(--dur) var(--ease-out);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1.5px;
  background: var(--accent-positive);
  box-shadow: 0 0 16px var(--accent-positive-glow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-slow) var(--ease-out);
}
.nav a:hover,
.nav a:focus-visible { color: var(--color-text); }
.nav a:hover::after,
.nav a:focus-visible::after,
.nav a[aria-current="page"]::after { transform: scaleX(1); }
.nav a[aria-current="page"] { color: var(--color-text); }

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Scroll progress bar */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
}
.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--accent-positive), var(--p-paper), var(--accent-positive-bright));
}

/* Mobile menu */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.nav-toggle__lines,
.nav-toggle__lines::before,
.nav-toggle__lines::after {
  content: "";
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}
.nav-toggle__lines { position: relative; }
.nav-toggle__lines::before { position: absolute; top: -6px; left: 0; }
.nav-toggle__lines::after { position: absolute; top: 6px; left: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__lines { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__lines::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__lines::after { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 49;
  background:
    radial-gradient(720px 420px at 80% 10%, rgba(37, 99, 235, 0.16), transparent 64%),
    var(--color-bg);
  padding: calc(var(--header-h) + var(--space-6)) var(--gutter) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out),
              visibility 0s linear var(--dur-slow);
}
.mobile-menu.is-open {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
  transition-delay: 0s;
}
.mobile-menu a {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-hairline);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 1.5rem;
  text-decoration: none;
}
.mobile-menu a .idx {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  color: var(--color-text-faint);
}
.mobile-menu .btn { margin-top: var(--space-5); }

/* ===========================================================================
   BUTTONS
   =========================================================================== */
.btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0 var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 560;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur) var(--ease-out),
              color var(--dur) var(--ease-out);
}
.btn::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  background: linear-gradient(110deg, transparent 0 34%, rgba(255,255,255,0.18) 48%, transparent 62% 100%);
  transform: translateX(-125%);
  transition: transform 640ms var(--ease-out);
}
.btn:hover::before { transform: translateX(125%); }
.btn--sm { min-height: 40px; padding: 0 var(--space-4); }
.btn:active { transform: scale(0.985); }

.btn--primary {
  background: var(--p-grad-signal-mint);
  color: var(--color-text-on-accent);
  border-color: transparent;
  box-shadow: var(--elev-raised), 0 16px 34px -20px var(--accent-positive-glow);
}
.btn--primary:hover {
  filter: brightness(1.05);
  box-shadow: var(--elev-raised), 0 0 30px -8px var(--accent-positive-glow);
}
.btn--primary:active { filter: brightness(0.96); }

.btn--secondary:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
  box-shadow: var(--elev-raised);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-hairline);
  color: var(--color-text-secondary);
}
.btn--ghost:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
  background: color-mix(in srgb, var(--color-surface) 64%, transparent);
}

.btn__arrow { transition: transform var(--dur) var(--ease-out); }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* Magnetic wrapper (JS-driven on fine pointers only) */
.magnetic { display: inline-flex; }

/* ===========================================================================
   STATUS CHIPS — the centerpiece component
   =========================================================================== */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px 10px 4px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid;
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}
.chip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex: none;
}
.chip--verified {
  color: var(--accent-positive-bright);
  border-color: color-mix(in srgb, var(--accent-positive) 40%, transparent);
  background: var(--accent-positive-wash);
}
.chip--verified .chip__dot { background: var(--accent-positive); }

.chip--evidence {
  color: var(--accent-interface-bright);
  border-color: color-mix(in srgb, var(--accent-interface) 40%, transparent);
  background: var(--accent-interface-wash);
}
.chip--evidence .chip__dot { background: transparent; box-shadow: inset 0 0 0 1.5px var(--accent-interface); }

.chip--review {
  color: var(--accent-review-bright);
  border-color: color-mix(in srgb, var(--accent-review) 40%, transparent);
  background: var(--accent-review-wash);
}
.chip--review .chip__dot {
  background: var(--accent-review);
  animation: chip-pulse 2s var(--ease-in-out) infinite;
}
@keyframes chip-pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-review-glow); }
  50% { box-shadow: 0 0 0 4px transparent; }
}

.chip--refused {
  color: var(--accent-refusal-bright);
  border-color: color-mix(in srgb, var(--accent-refusal) 40%, transparent);
  background: var(--accent-refusal-wash);
}
.chip--refused .chip__dot {
  background: var(--accent-refusal);
  position: relative;
}
.chip--refused .chip__dot::after {
  content: "";
  position: absolute;
  inset: -2px;
  border-top: 1.5px solid var(--accent-refusal-bright);
  transform: rotate(-45deg);
  transform-origin: center;
}

/* ===========================================================================
   PANELS & CARDS
   =========================================================================== */
.panel {
  position: relative;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--color-surface-raised) 44%, transparent), transparent 56%),
    var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--elev-raised);
  padding: var(--space-5);
  overflow: hidden;
}
.panel--float {
  box-shadow: var(--elev-float), 0 0 42px -28px var(--accent-positive-glow);
}
.panel--crop { overflow: visible; }
.panel__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  color: var(--accent-interface);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-data);
  letter-spacing: var(--tr-data);
}

/* Crop-mark variant (blueprint cue at two corners) */
.panel--crop::before,
.panel--crop::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border: 1px solid var(--color-border-strong);
  pointer-events: none;
}
.panel--crop::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.panel--crop::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

/* Generic card with hover lift */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--color-surface-raised) 42%, transparent), transparent 60%),
    var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: transform var(--dur-slow) var(--ease-out),
              border-color var(--dur-slow) var(--ease-out),
              box-shadow var(--dur-slow) var(--ease-out),
              background var(--dur-slow) var(--ease-out);
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: var(--space-5); right: var(--space-5);
  height: 1px;
  background: var(--color-bevel);
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out);
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--card-accent, var(--color-border-strong));
  box-shadow: var(--elev-raised), 0 24px 46px -28px rgba(0,0,0,0.64);
}
.card:hover::before { opacity: 1; }
.card h3 { color: var(--color-text); }
.card p { color: var(--color-text-muted); }
.card__index {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-data);
  color: var(--color-text-faint);
  letter-spacing: var(--tr-data);
}

/* Plane-typed cards */
.card--data { --card-accent: color-mix(in srgb, var(--accent-interface) 55%, transparent); }
.card--control {
  --card-accent: color-mix(in srgb, var(--accent-positive) 50%, transparent);
  background: var(--color-surface-raised);
}
.card--control:hover { box-shadow: var(--elev-raised), 0 0 30px -12px var(--accent-positive-glow); }

/* ===========================================================================
   HERO
   =========================================================================== */
.hero {
  position: relative;
  min-height: min(820px, calc(100svh - var(--header-h)));
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}
.hero::before {
  content: "";
  position: absolute;
  right: clamp(28px, 8vw, 128px);
  top: clamp(84px, 14vh, 150px);
  width: clamp(160px, 24vw, 340px);
  aspect-ratio: 1;
  background: url("../assets/fort-icon.svg") center / contain no-repeat;
  opacity: 0.075;
  filter: drop-shadow(0 0 42px rgba(37, 99, 235, 0.54));
  pointer-events: none;
  animation: fort-mark-drift 9s var(--ease-in-out) infinite;
}
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.9;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(95deg, var(--color-bg) 2%, rgba(8,11,16,0.78) 46%, rgba(8,11,16,0.42) 78%),
    radial-gradient(680px 340px at 78% 28%, rgba(37, 99, 235, 0.16), transparent 68%),
    linear-gradient(180deg, rgba(8,11,16,0.08), var(--color-bg) 96%);
}
@keyframes fort-mark-drift {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); opacity: 0.06; }
  50% { transform: translate3d(0, -10px, 0) scale(1.025); opacity: 0.095; }
}
.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding-block: clamp(var(--space-8), 12vh, var(--space-10));
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.66fr);
  gap: clamp(var(--space-6), 5vw, var(--space-8));
  align-items: center;
}
.hero__promise {
  margin: var(--space-5) 0 var(--space-4);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.2rem, 0.9rem + 1.2vw, 1.65rem);
  line-height: 1.3;
  letter-spacing: 0;
  color: var(--color-text);
  max-width: 30ch;
}
.hero__lede { margin-bottom: var(--space-6); }
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.status-line {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  max-width: 56ch;
}

/* Hero side panel: controlled build path */
.state-list {
  display: grid;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
}
.state-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  background: var(--color-bg-sunken);
  transition: transform var(--dur-slow) var(--ease-out),
              border-color var(--dur-slow) var(--ease-out),
              background var(--dur-slow) var(--ease-out);
}
.state-list li:hover {
  transform: translateX(4px);
  border-color: color-mix(in srgb, var(--accent-positive) 36%, var(--color-border));
  background: color-mix(in srgb, var(--color-bg-sunken) 82%, var(--accent-positive-wash));
}
.state-list .step-label { color: var(--color-text); }
.state-list .step-value {
  color: var(--accent-positive-bright);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--tr-data);
}

/* ===========================================================================
   PILLARS
   =========================================================================== */
.pillars {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--grid-gap);
}
.pillar {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  transition: transform var(--dur-slow) var(--ease-out),
              border-color var(--dur-slow) var(--ease-out);
}
.pillar:hover {
  transform: translateY(-4px);
  border-top-color: var(--accent-positive);
}
.pillar__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--tr-label);
  color: var(--accent-interface);
}
.pillar h3 { font-size: 1.05rem; }
.pillar p { color: var(--color-text-muted); font-size: var(--fs-small); }

/* ===========================================================================
   COMPARISON TABLE
   =========================================================================== */
.comparison {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--elev-raised);
}
.compare-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--color-hairline);
  transition: background var(--dur-slow) var(--ease-out);
}
.compare-row:not(.compare-head):hover {
  background: color-mix(in srgb, var(--accent-positive-wash) 40%, transparent);
}
.compare-row:first-child { border-top: 0; }
.compare-row > * { padding: var(--space-4) var(--space-5); }
.compare-row .col-ordinary { color: var(--color-text-muted); background: var(--color-bg-sunken); }
.compare-row .col-fort {
  position: relative;
  color: var(--color-text);
  border-left: 1px solid var(--color-hairline);
  box-shadow: inset 2px 0 0 color-mix(in srgb, var(--accent-positive) 50%, transparent);
}
.compare-row .col-fort::before {
  content: "✓";
  margin-right: var(--space-2);
  color: var(--accent-positive);
  font-weight: 700;
}
.compare-head > * {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-data);
  letter-spacing: var(--tr-data);
  text-transform: uppercase;
  background: var(--color-surface-raised);
  color: var(--color-text);
}
.compare-head .col-ordinary { color: var(--color-text-muted); }
.compare-head .col-fort::before { content: none; }

/* ===========================================================================
   WORKFLOW STEP RAIL
   =========================================================================== */
.steps {
  position: relative;
  display: grid;
  gap: var(--space-4);
  list-style: none;
  padding: 0;
}
.steps--rail { padding-left: var(--space-6); }
.steps--rail::before {
  content: "";
  position: absolute;
  left: 7px; top: 8px; bottom: 8px;
  width: 1px;
  background: var(--color-border);
}
.steps--rail::after {
  content: "";
  position: absolute;
  left: 7px; top: 8px;
  width: 1px;
  height: calc(100% - 16px);
  background: linear-gradient(var(--accent-interface), var(--accent-positive));
  transform: scaleY(var(--rail-fill, 0));
  transform-origin: top;
}
.step {
  position: relative;
  padding: var(--space-4) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  transition: transform var(--dur-slow) var(--ease-out),
              border-color var(--dur-slow) var(--ease-out),
              box-shadow var(--dur-slow) var(--ease-out);
}
.steps--rail .step::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-6) + 4px);
  top: var(--space-5);
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 1.5px solid var(--accent-interface);
}
.step.is-active { transform: translateY(-2px); border-color: color-mix(in srgb, var(--accent-positive) 45%, transparent); }
.step:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent-positive) 36%, var(--color-border));
  box-shadow: 0 18px 34px -28px var(--accent-positive-glow);
}
.step.is-active::before { background: var(--accent-positive); border-color: var(--accent-positive); }
.step__num {
  display: inline-block;
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-data);
  letter-spacing: var(--tr-data);
  color: var(--accent-positive);
  transition: color var(--dur) var(--ease-out);
}
.step.is-active .step__num { color: var(--accent-positive-bright); }
.step strong { display: block; margin-bottom: var(--space-2); }
.step p { color: var(--color-text-muted); font-size: var(--fs-small); }

/* When laid out as a 3-col grid (teaser) */
.steps--grid {
  grid-template-columns: repeat(3, 1fr);
}
.steps--grid .step::before { content: none; }

/* ===========================================================================
   MODULE GRID
   =========================================================================== */
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}
.module-grid .card__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
  color: var(--color-text-faint);
}
.layer-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-6) 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.layer-label::after { content: ""; flex: 1; height: 1px; background: var(--color-hairline); }

/* ===========================================================================
   GATE STRIP / GATE SEQUENCE
   =========================================================================== */
.gate-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.gate {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-height: 64px;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-sunken);
  transition: border-color var(--dur) var(--ease-out), background var(--dur) var(--ease-out);
}
.gate__name {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-data);
  letter-spacing: var(--tr-data);
  color: var(--color-text);
}
.gate__state {
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
  color: var(--color-text-faint);
}
.gate.is-passed { border-color: color-mix(in srgb, var(--accent-interface) 40%, transparent); }
.gate.is-passed .gate__state { color: var(--accent-interface); }
.gate.is-active {
  border-color: color-mix(in srgb, var(--accent-positive) 60%, transparent);
  box-shadow: 0 0 24px -8px var(--accent-positive-glow);
}
.gate.is-active .gate__state { color: var(--accent-positive); }
.gate.is-refused {
  border-color: color-mix(in srgb, var(--accent-refusal) 60%, transparent);
  box-shadow: 0 0 24px -8px var(--accent-refusal-glow);
}
.gate.is-refused .gate__state { color: var(--accent-refusal); }
.gate:hover { border-color: color-mix(in srgb, var(--accent-positive) 50%, transparent); }

/* Gate sequence set-piece */
.gate-seq {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 56vh;
}
.gate-seq__lead {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
}
.gate-seq__track {
  position: relative;
  padding-top: 18px;
}
.gate-seq .gate-strip {
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-2);
}
.gate-seq__token,
.gate-seq__ghost {
  position: absolute;
  top: 0;
  left: 0;
  width: 12px;
  height: 12px;
  margin-left: -6px;
  border-radius: 50%;
  pointer-events: none;
}
.gate-seq__token {
  background: var(--accent-review);
  box-shadow: 0 0 14px 1px var(--accent-review-glow);
}
.gate-seq__ghost {
  background: var(--accent-refusal);
  box-shadow: 0 0 12px 1px var(--accent-refusal-glow);
  opacity: 0;
}
.gate-seq__refusal {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-5);
  padding: var(--space-3) var(--space-4);
  border: 1px dashed color-mix(in srgb, var(--accent-refusal) 40%, transparent);
  border-radius: var(--radius);
  background: var(--accent-refusal-wash);
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  opacity: 0.45;
  transition: opacity var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.gate-seq__refusal .chip { flex: none; }
.gate-seq__refusal.is-active,
.gate-seq__refusal.is-noted { opacity: 1; }
.gate-seq__refusal.is-active { border-color: color-mix(in srgb, var(--accent-refusal) 70%, transparent); }

@media (max-width: 860px) {
  .gate-seq { min-height: 0; }
  .gate-seq .gate-strip { grid-template-columns: repeat(2, 1fr); }
  .gate-seq__token, .gate-seq__ghost { display: none; }
}
@media (max-width: 560px) {
  .gate-seq .gate-strip { grid-template-columns: 1fr; }
}

/* ===========================================================================
   TERMINAL / CODE BLOCK
   =========================================================================== */
.terminal {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg-sunken);
  box-shadow: var(--elev-raised);
  overflow: hidden;
  font-family: var(--font-mono);
}
.terminal__bar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-hairline);
  background: var(--color-surface);
}
.terminal__dots { display: flex; gap: 6px; }
.terminal__dots span { width: 8px; height: 8px; border-radius: 50%; background: var(--color-text-faint); opacity: 0.5; }
.terminal__file { font-size: var(--fs-mono-label); color: var(--color-text-muted); letter-spacing: var(--tr-data); }
.terminal__body {
  padding: var(--space-4) var(--space-5);
  font-size: var(--fs-mono-data);
  line-height: 1.7;
  color: var(--color-text-secondary);
  white-space: pre-wrap;
}
.terminal .t-key { color: var(--accent-interface); }
.terminal .t-str { color: var(--accent-positive); }
.terminal .t-com { color: var(--color-text-faint); }
.terminal .t-err { color: var(--accent-refusal); }
.terminal .t-warn { color: var(--accent-review); }

/* ===========================================================================
   LOOP DIAGRAM (approach)
   =========================================================================== */
.loop { list-style: none; padding: 0; display: grid; gap: var(--space-3); }
.loop__node {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-sunken);
  color: var(--color-text);
}
.loop__node + .loop__node::before {
  content: "";
  position: absolute;
  left: 19px; top: calc(-1 * var(--space-3) - 1px);
  width: 1px; height: var(--space-3);
  background: linear-gradient(var(--accent-interface), var(--accent-positive));
}
.loop__dot {
  width: 9px; height: 9px; border-radius: 50%; flex: none;
  background: var(--accent-interface);
  box-shadow: 0 0 0 3px var(--accent-interface-wash);
}
.loop__node--review .loop__dot { background: var(--accent-review); box-shadow: 0 0 0 3px var(--accent-review-wash); }
.loop__node--out .loop__dot { background: var(--accent-positive); box-shadow: 0 0 0 3px var(--accent-positive-wash); }
.loop__memory {
  display: flex; align-items: center; gap: var(--space-2);
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}
.loop__memory span { color: var(--accent-positive); font-size: 1.1em; }

/* ===========================================================================
   ARCHITECTURE SPINE (SVG)
   =========================================================================== */
.arch-spine {
  min-height: 470px;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background:
    radial-gradient(620px 300px at 72% 28%, rgba(37, 99, 235, 0.10), transparent 66%),
    linear-gradient(180deg, color-mix(in srgb, var(--color-surface-raised) 58%, transparent), var(--color-surface));
  box-shadow: var(--elev-raised);
}
html.motion-ready .arch-spine[data-reveal] {
  opacity: 1;
  transform: none;
}
.arch-spine:empty::before {
  content: "";
  display: block;
  min-height: 420px;
  border-radius: var(--radius-sm);
  background:
    url("../assets/fort-icon.svg") center / 132px 132px no-repeat,
    linear-gradient(var(--color-hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-hairline) 1px, transparent 1px);
  background-size: 132px 132px, 44px 44px, 44px 44px;
  opacity: 0.42;
}
.spine {
  width: 100%;
  height: auto;
  overflow: visible;
}
.spine__edge {
  fill: none;
  stroke-width: 1.5;
  opacity: 0.5;
  transition: opacity var(--dur-slow) var(--ease-out), stroke-width var(--dur-slow) var(--ease-out);
}
.spine__edge--data { stroke: var(--accent-interface); }
.spine__edge--control { stroke: var(--accent-review); }
.spine__node {
  cursor: pointer;
  transition: opacity var(--dur-slow) var(--ease-out);
}
.spine__node-box {
  fill: var(--color-surface);
  stroke: var(--color-border);
  stroke-width: 1;
  transition: stroke var(--dur) var(--ease-out), fill var(--dur) var(--ease-out);
}
.spine__node-label {
  fill: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  text-anchor: middle;
  dominant-baseline: middle;
}
.spine__plane { fill: var(--color-text-faint); }
.spine__node:focus-visible { outline: none; }
.spine__node:focus-visible .spine__node-box,
.spine__node:hover .spine__node-box { stroke: var(--accent-positive); }
.spine.is-dimmed .spine__node:not(.is-active) { opacity: 0.25; }
.spine.is-dimmed .spine__edge:not(.is-active) { opacity: 0.12; }
.spine__edge.is-active { opacity: 1; stroke-width: 2; }
.spine__caption {
  margin-top: var(--space-4);
  min-height: 3em;
  color: var(--color-text-muted);
  font-size: var(--fs-small);
}
.spine__caption strong { color: var(--color-text); }

/* ===========================================================================
   STATUS / MATURITY MAP
   =========================================================================== */
.status-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(300px, 1fr);
  gap: clamp(var(--space-5), 4vw, var(--space-7));
  padding: clamp(var(--space-5), 4vw, var(--space-7));
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background:
    var(--p-grad-plane),
    linear-gradient(135deg, var(--color-surface-raised), var(--color-bg-sunken));
  box-shadow: var(--elev-float);
}
.maturity {
  display: grid;
  gap: var(--space-2);
}
.maturity__row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  background: var(--color-bg-sunken);
}
.maturity__name { color: var(--color-text); font-size: var(--fs-small); }

/* ===========================================================================
   FAQ (disclosure)
   =========================================================================== */
.faq { display: grid; gap: var(--space-2); }
.faq details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  overflow: hidden;
}
.faq summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  color: var(--color-text);
  font-weight: 560;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--accent-interface);
  font-size: 1.2rem;
  transition: transform var(--dur) var(--ease-out);
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > div {
  padding: 0 var(--space-5) var(--space-5);
  color: var(--color-text-muted);
}

/* ===========================================================================
   CTA BAND
   =========================================================================== */
.cta-band {
  position: relative;
  padding-block: clamp(var(--space-8), 9vw, var(--space-10));
  border-top: 1px solid var(--color-border);
  background:
    radial-gradient(760px 420px at 80% 30%, rgba(37, 99, 235, 0.18), transparent 62%),
    linear-gradient(135deg, #151a21, #080b10);
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(245,247,250,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245,247,250,0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
}
.cta-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.cta-band h2 { max-width: 18ch; }
.cta-band p { color: var(--color-text-muted); margin-top: var(--space-3); max-width: 48ch; }

/* ===========================================================================
   FOOTER
   =========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  padding-block: var(--space-8) var(--space-6);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-7);
}
.site-footer__brand { display: flex; flex-direction: column; gap: var(--space-3); max-width: 36ch; }
.site-footer__tagline { color: var(--color-text-muted); font-size: var(--fs-small); }
.footer-col h3 {
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 500;
}
.footer-col a {
  display: block;
  padding: var(--space-1) 0;
  color: var(--color-text-muted);
  font-size: var(--fs-small);
  text-decoration: none;
  transition: color var(--dur) var(--ease-out);
}
.footer-col a:hover { color: var(--color-text); }
.site-footer__fine {
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-hairline);
  color: var(--color-text-faint);
  font-size: var(--fs-small);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  justify-content: space-between;
}
.site-footer__disclaimer { max-width: 70ch; margin-bottom: var(--space-5); color: var(--color-text-muted); font-size: var(--fs-small); }

/* ===========================================================================
   COMPACT PAGE HERO (interior pages)
   =========================================================================== */
.page-hero {
  position: relative;
  padding-block: clamp(var(--space-8), 12vh, var(--space-10)) var(--section-pad);
  border-bottom: 1px solid var(--color-hairline);
  overflow: hidden;
  background:
    radial-gradient(820px 420px at 82% 18%, rgba(37, 99, 235, 0.18), transparent 66%),
    linear-gradient(180deg, #11161d, #080b10);
}
.page-hero::after {
  content: "";
  position: absolute;
  right: clamp(24px, 8vw, 120px);
  top: clamp(72px, 10vh, 120px);
  width: clamp(130px, 18vw, 260px);
  aspect-ratio: 1;
  background: url("../assets/fort-icon.svg") center / contain no-repeat;
  opacity: 0.06;
  pointer-events: none;
}
.page-hero > .container {
  position: relative;
  z-index: 1;
}
.page-hero h1 { max-width: 18ch; margin-bottom: var(--space-4); }
.page-hero .lede { max-width: 56ch; }

/* ===========================================================================
   RESPONSIVE
   =========================================================================== */
@media (max-width: 1024px) {
  .pillars { grid-template-columns: repeat(2, 1fr); }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .gate-strip { grid-template-columns: repeat(2, 1fr); }
  .steps--grid { grid-template-columns: repeat(2, 1fr); }
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .nav,
  .site-header__actions .btn--primary { display: none; }
  .nav-toggle { display: inline-flex; }
  .hero__grid { grid-template-columns: minmax(0, 1fr); }
  .hero__copy,
  .hero__panel {
    min-width: 0;
  }
  .status-panel { grid-template-columns: 1fr; }
  .spine,
  .spine__caption { display: none; }        /* SVG spine → fallback module grid on small screens */
}

@media (max-width: 768px) {
  .compare-row { grid-template-columns: 1fr; }
  .compare-row .col-fort { border-left: 0; border-top: 1px solid var(--color-hairline); box-shadow: inset 0 2px 0 color-mix(in srgb, var(--accent-positive) 50%, transparent); }
  .steps--grid { grid-template-columns: 1fr; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .pillars,
  .module-grid,
  .gate-strip { grid-template-columns: 1fr; }
  .pillars,
  .module-grid,
  .gate-strip,
  .steps,
  .comparison,
  .status-panel,
  .faq,
  .panel,
  .card,
  .step,
  .gate {
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }
  .site-footer__grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero h1 {
    max-width: 100%;
    font-size: clamp(2.45rem, 11vw, 2.95rem);
    line-height: 1.02;
  }
  .hero__inner,
  .hero__grid {
    width: 100%;
    overflow: hidden;
  }
  .hero__copy,
  .hero__grid,
  .hero__panel,
  .panel,
  .status-line {
    min-width: 0;
    max-width: 100%;
    width: 100%;
  }
  .panel__title {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    justify-items: start;
    align-items: start;
    gap: var(--space-2);
  }
  .panel,
  .panel--crop {
    overflow: hidden;
  }
  .hero__promise,
  .hero__lede,
  .status-line { overflow-wrap: break-word; }
  .chip,
  .mono,
  .state-list .step-label,
  .state-list .step-value,
  .terminal__body,
  .footer-col a,
  .site-footer__fine {
    overflow-wrap: anywhere;
  }
  .chip,
  .state-list .step-value {
    white-space: normal;
  }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn {
    width: 100%;
    min-width: 0;
    white-space: normal;
    text-align: center;
  }
  .status-line {
    flex-direction: column;
    gap: var(--space-2);
  }
  .state-list li { flex-direction: column; align-items: flex-start; gap: var(--space-1); }
}