/* =============================================================
   ANIMAL RESEARCH OPS STUDIO — STYLES
   Aesthetic: Mission Control / Research Console
   Inspiration: Destiny 2 UI · Apple minimalism · Institutional gravity
   ============================================================= */

/* --------------------------------------------------- TOKENS */

:root {
  /* surfaces */
  --bg-deepest:   #06070A;
  --bg-base:      #0A0B0E;
  --bg-surface:   #13151A;
  --bg-raised:    #181A20;

  /* borders */
  --line-faint:   #1A1C22;
  --line:         #23262E;
  --line-strong:  #33363E;

  /* foreground */
  --fg:           #EDE6D3;   /* warm institutional cream */
  --fg-soft:      #B8B3A6;
  --fg-mute:      #7E7C75;
  --fg-dim:       #57565A;
  --fg-faint:     #3D3D42;

  /* accents */
  --gold:         #D4A85F;
  --gold-bright:  #F0C36D;
  --gold-dim:     #8A6C3D;
  --gold-glow:    rgba(212, 168, 95, 0.18);
  --cool:         #5DAEC2;
  --veto:         #C46B4F;

  /* type */
  --font-display: 'Big Shoulders Display', 'Arial Narrow', sans-serif;
  --font-body:    'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', Menlo, monospace;

  /* layout */
  --max:        1320px;
  --gutter:     clamp(1.25rem, 4vw, 3.5rem);
  --section-y:  clamp(5rem, 9vw, 9.5rem);

  /* motion */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:cubic-bezier(0.83, 0, 0.17, 1);
}

/* ----------------------------------------------- RESET & BASE */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  font-feature-settings: "ss01", "cv11";
  overflow-x: hidden;
  position: relative;
}

img, svg { display: block; max-width: 100%; }

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

button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }

::selection { background: var(--gold); color: var(--bg-deepest); }

/* ----------------------------------------------- ATMOSPHERIC OVERLAYS */

.grain {
  position: fixed; inset: 0; z-index: 100;
  pointer-events: none; opacity: 0.06; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' seed='5'/></filter><rect width='140' height='140' filter='url(%23n)' opacity='0.85'/></svg>");
}

.scanlines {
  position: fixed; inset: 0; z-index: 99;
  pointer-events: none; opacity: 0.4;
  background-image: linear-gradient(180deg, rgba(255,255,255,0.018) 0%, rgba(255,255,255,0.018) 1px, transparent 1px, transparent 3px);
  background-size: 100% 3px;
}

.vignette {
  position: fixed; inset: 0; z-index: 98;
  pointer-events: none;
  background: radial-gradient(ellipse 120% 80% at 50% 50%, transparent 0%, transparent 55%, rgba(0,0,0,0.55) 100%);
}

/* ----------------------------------------------- TYPOGRAPHY */

.display, h1, h2, h3, .hero-title, .section-title, .tier-name, .r-name, .alloc-title, .facility-name, .scale-num, .pillar-title, .qs-title, .cluster-name {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 0.95;
}

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.85em;
  letter-spacing: 0.02em;
}

.accent { color: var(--gold); }

/* ----------------------------------------------- HEADER */

.site-header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem var(--gutter);
  backdrop-filter: blur(12px) saturate(1.1);
  -webkit-backdrop-filter: blur(12px) saturate(1.1);
  background: linear-gradient(180deg, rgba(6,7,10,0.85) 0%, rgba(6,7,10,0.55) 100%);
  border-bottom: 1px solid var(--line-faint);
}

.brand {
  display: flex; align-items: center; gap: 0.85rem;
  color: var(--fg);
}

.brand-glyph {
  width: 28px; height: 28px;
  color: var(--gold);
  flex-shrink: 0;
}

.brand-mark {
  display: flex; align-items: baseline; gap: 0.45rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.brand-name { color: var(--fg); }
.brand-sep { color: var(--gold); font-weight: 700; }
.brand-sub { color: var(--fg-mute); font-weight: 600; letter-spacing: 0.22em; }

.primary-nav {
  display: flex; gap: 2.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.primary-nav a {
  color: var(--fg-soft);
  position: relative;
  padding: 0.4rem 0;
  transition: color 0.3s var(--ease-out);
}
.primary-nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px; background: var(--gold);
  transition: right 0.4s var(--ease-out);
}
.primary-nav a:hover {
  color: var(--fg);
}
.primary-nav a:hover::after { right: 0; }

.header-cta {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--gold);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out);
  position: relative;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.header-cta:hover {
  background: var(--gold);
  color: var(--bg-deepest);
}

@media (max-width: 900px) {
  .primary-nav { display: none; }
}

/* ----------------------------------------------- BUTTONS */

.btn {
  display: inline-flex; align-items: center; gap: 0.7rem;
  padding: 1rem 1.55rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: 1px solid var(--gold);
  position: relative;
  overflow: hidden;
  transition: color 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}
.btn::before {
  content: ""; position: absolute; inset: 0;
  background: var(--gold);
  transform: translateY(101%);
  transition: transform 0.4s var(--ease-out);
  z-index: -1;
}
.btn:hover::before { transform: translateY(0); }

.btn-primary {
  color: var(--bg-deepest);
  background: var(--gold);
}
.btn-primary::before { background: var(--gold-bright); }
.btn-primary:hover { color: var(--bg-deepest); }

.btn-ghost {
  color: var(--gold);
  background: transparent;
}
.btn-ghost:hover { color: var(--bg-deepest); }

.btn svg { transition: transform 0.3s var(--ease-out); }
.btn:hover svg { transform: translateX(4px); }

/* ----------------------------------------------- HERO */

.hero {
  position: relative;
  min-height: 100vh;
  padding: clamp(7rem, 14vh, 11rem) var(--gutter) clamp(4rem, 8vh, 6rem);
  display: flex; align-items: center;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(0deg, transparent 49.5%, rgba(212,168,95,0.045) 50%, transparent 50.5%),
    linear-gradient(90deg, transparent 49.5%, rgba(212,168,95,0.045) 50%, transparent 50.5%),
    linear-gradient(0deg, var(--line-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-faint) 1px, transparent 1px);
  background-size:
    100% 100%,
    100% 100%,
    100% 80px,
    80px 100%;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 60%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 60%, black 30%, transparent 100%);
  opacity: 0.55;
}

.hero-orbit {
  position: absolute;
  right: -8%;
  top: 50%; transform: translateY(-50%);
  width: clamp(420px, 62vw, 760px);
  pointer-events: none;
  opacity: 0.85;
  z-index: 1;
}
.hero-orbit-spin {
  transform-origin: 0 0;
  animation: spin 60s linear infinite;
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-content {
  position: relative; z-index: 2;
  max-width: var(--max);
  margin: 0 auto;
  width: 100%;
}

.hero-classification {
  display: flex; align-items: center; gap: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 2rem;
}
.cls-stamp { color: var(--gold); }
.cls-version { color: var(--fg-mute); border-left: 1px solid var(--line); padding-left: 1.2rem; }

.hero-title {
  margin: 0;
  font-size: clamp(3.4rem, 11vw, 9rem);
  line-height: 0.88;
  letter-spacing: -0.005em;
}
.hero-title .line {
  display: block; overflow: hidden;
}
.hero-title .line span {
  display: block;
  transform: translateY(110%);
  transition: transform 1.1s var(--ease-out);
}
.is-loaded .hero-title .line span { transform: translateY(0); }
.hero-title .line:nth-child(1) span { transition-delay: 0.10s; }
.hero-title .line:nth-child(2) span { transition-delay: 0.22s; }
.hero-title .line:nth-child(3) span { transition-delay: 0.34s; }
.hero-title .line.accent span { color: var(--gold); }

.hero-rule {
  display: flex; align-items: center; gap: 1rem;
  margin: 2.25rem 0 2rem;
  max-width: 560px;
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.8s 0.6s var(--ease-out), transform 0.8s 0.6s var(--ease-out);
}
.is-loaded .hero-rule { opacity: 1; transform: translateY(0); }
.rule-bar { flex: 1; height: 1px; background: linear-gradient(90deg, transparent, var(--line-strong), transparent); }
.rule-diamond { color: var(--gold); font-size: 0.65rem; }

.hero-tagline {
  max-width: 580px;
  font-size: clamp(1.05rem, 1.3vw, 1.25rem);
  line-height: 1.55;
  color: var(--fg-soft);
  margin: 0 0 3rem;
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.9s 0.75s var(--ease-out), transform 0.9s 0.75s var(--ease-out);
}
.is-loaded .hero-tagline { opacity: 1; transform: translateY(0); }
.hero-tagline em { font-style: normal; color: var(--fg); border-bottom: 1px solid var(--gold); padding-bottom: 1px; }

.hero-stats {
  list-style: none; margin: 0 0 3.5rem; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1.4rem 0;
  max-width: 760px;
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.9s 0.9s var(--ease-out), transform 0.9s 0.9s var(--ease-out);
}
.is-loaded .hero-stats { opacity: 1; transform: translateY(0); }
.hero-stats li {
  display: flex; flex-direction: column; gap: 0.25rem;
  padding: 0 1rem;
  border-right: 1px solid var(--line);
}
.hero-stats li:last-child { border-right: 0; }
.stat-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: 0.02em;
  color: var(--fg);
  line-height: 1;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-mute);
}

.hero-cta {
  display: flex; flex-wrap: wrap; gap: 1rem;
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.9s 1.05s var(--ease-out), transform 0.9s 1.05s var(--ease-out);
}
.is-loaded .hero-cta { opacity: 1; transform: translateY(0); }

.hero-scroll {
  position: absolute;
  bottom: 2rem; left: var(--gutter);
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-mute);
  transition: color 0.3s var(--ease-out);
  opacity: 0;
  transition: opacity 1s 1.4s var(--ease-out), color 0.3s var(--ease-out);
}
.is-loaded .hero-scroll { opacity: 1; }
.hero-scroll:hover { color: var(--gold); }
.hero-scroll svg { animation: scroll-bob 2.4s ease-in-out infinite; }
@keyframes scroll-bob {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(3px); }
}

@media (max-width: 720px) {
  .hero-orbit { right: -50%; opacity: 0.4; }
  .hero-classification { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .cls-version { border-left: 0; padding-left: 0; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); }
  .hero-stats li:nth-child(3) { border-right: 0; }
  .hero-stats li:nth-child(4),
  .hero-stats li:nth-child(5),
  .hero-stats li:nth-child(6) { border-top: 1px solid var(--line); margin-top: 1.2rem; padding-top: 1.2rem; }
}

/* ----------------------------------------------- SECTIONS */

.section {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  padding: var(--section-y) var(--gutter);
}

.section-marker {
  display: flex; align-items: center; gap: 1.25rem;
  margin-bottom: 3rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.section-num { color: var(--gold); font-weight: 600; }
.section-label { color: var(--fg-soft); }
.section-rule {
  flex: 1; height: 1px;
  background: linear-gradient(90deg, var(--line-strong) 0%, var(--line) 60%, transparent 100%);
}

.section-title {
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 0.92;
  margin: 0 0 1.5rem;
  max-width: 22ch;
}

.section-lede {
  max-width: 62ch;
  font-size: clamp(1.05rem, 1.2vw, 1.2rem);
  color: var(--fg-soft);
  margin: 0 0 4rem;
  line-height: 1.55;
}

/* MISSION ----- */

.section-mission { border-top: 1px solid var(--line-faint); }

.pillars {
  list-style: none; margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}
.pillar {
  padding: 2rem 1.75rem 2.25rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background 0.4s var(--ease-out);
}
.pillar:hover { background: var(--bg-surface); }
.pillar:hover .pillar-mark { color: var(--gold-bright); transform: rotate(45deg) scale(1.15); }
.pillar-mark {
  color: var(--gold);
  font-size: 0.85rem;
  margin-bottom: 0.85rem;
  display: inline-block;
  transition: transform 0.5s var(--ease-out), color 0.3s var(--ease-out);
}
.pillar-title {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  margin: 0 0 0.85rem;
  color: var(--fg);
}
.pillar p { margin: 0; color: var(--fg-soft); font-size: 0.95rem; line-height: 1.55; }

/* THE 3 RS ----- */

.section-3rs {
  position: relative;
}
.section-3rs::before {
  content: ""; position: absolute; left: var(--gutter); right: var(--gutter); top: 0;
  height: 1px; background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.rs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.r-card {
  position: relative;
  padding: 2.25rem 2rem 2rem;
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-base) 100%);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform 0.5s var(--ease-out), border-color 0.4s var(--ease-out);
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}
.r-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-dim);
}
.r-card-frame {
  position: absolute; inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, transparent 0, transparent 18px, var(--line) 18px, var(--line) 19px, transparent 19px) top left/40px 40px no-repeat,
    linear-gradient(45deg,  transparent 0, transparent 18px, var(--line) 18px, var(--line) 19px, transparent 19px) bottom right/40px 40px no-repeat;
  opacity: 0.5;
  transition: opacity 0.4s var(--ease-out);
}
.r-card:hover .r-card-frame { opacity: 1; }

.r-num {
  font-family: var(--font-display);
  font-size: 4.5rem;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
  letter-spacing: 0;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}
.r-num::after {
  content: ""; position: absolute;
  bottom: 6px; left: 100%; margin-left: 0.5rem;
  width: 36px; height: 1px;
  background: var(--gold);
  opacity: 0.5;
}
.r-name {
  font-size: 1.65rem;
  margin: 0 0 0.5rem;
  letter-spacing: 0.04em;
}
.r-tagline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 1.25rem;
}
.r-body {
  margin: 0 0 2rem;
  color: var(--fg-soft);
  font-size: 0.96rem;
  line-height: 1.6;
}
.r-foot {
  display: flex; justify-content: space-between; gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

/* ARCHITECTURE ----- */

.section-arch { padding-bottom: calc(var(--section-y) + 2rem); }

.tier {
  position: relative;
  margin-bottom: 2.25rem;
  padding: 2.5rem clamp(1.25rem, 3vw, 2.5rem);
  background: var(--bg-surface);
  border: 1px solid var(--line);
  overflow: hidden;
}
.tier::before {
  content: ""; position: absolute; top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--gold);
  transition: width 0.5s var(--ease-out);
}
.tier:hover::before { width: 6px; }

.tier-1 { padding: 3.5rem clamp(1.25rem, 3vw, 3rem); }
.tier-1::before { background: var(--gold); }
.tier-2::before { background: linear-gradient(180deg, var(--gold) 0%, var(--gold-dim) 100%); width: 3px; }
.tier-3 { padding: 1.85rem clamp(1.25rem, 3vw, 2.5rem); }
.tier-3::before { background: var(--gold-dim); width: 2px; }

.tier-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: clamp(1rem, 2vw, 2.25rem);
  align-items: start;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.tier-rank {
  display: flex; flex-direction: column; align-items: flex-start; gap: 0.35rem;
}
.tier-roman {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  color: var(--gold);
  line-height: 0.9;
  letter-spacing: 0.06em;
}
.tier-3 .tier-roman { font-size: clamp(1.8rem, 3.5vw, 2.4rem); color: var(--gold-dim); }
.tier-tick {
  display: block;
  width: 32px; height: 2px;
  background: var(--gold);
}
.tier-3 .tier-tick { background: var(--gold-dim); width: 22px; }

.tier-titleblock { display: flex; flex-direction: column; gap: 0.3rem; }
.tier-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}
.tier-name {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  letter-spacing: 0.05em;
}
.tier-3 .tier-name { font-size: clamp(1.3rem, 2.4vw, 1.7rem); }
.tier-desc {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
  color: var(--fg-soft);
  max-width: 60ch;
}
.tier-3 .tier-desc { font-size: 0.88rem; }

.tier-count {
  display: flex; flex-direction: column; align-items: flex-end; gap: 0.2rem;
  text-align: right;
}
.tc-num {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--fg);
  line-height: 1;
}
.tier-3 .tc-num { font-size: clamp(1.6rem, 2.6vw, 2rem); color: var(--fg-soft); }
.tc-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-mute);
}

.tier-list {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 0.85rem;
}
.tier-list--cols { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.tier-list--grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0.6rem; }

.agent {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: start;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line-faint);
  background: var(--bg-base);
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.agent:hover {
  background: var(--bg-raised);
  border-color: var(--line-strong);
  transform: translateX(2px);
}
.agent-glyph { color: var(--gold); font-size: 0.9rem; line-height: 1.4; }
.agent-meta { display: flex; flex-direction: column; gap: 0.25rem; }
.agent-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg);
}
.agent-role {
  font-size: 0.85rem;
  color: var(--fg-soft);
  line-height: 1.45;
}

.agent--feature {
  background: linear-gradient(90deg, var(--bg-raised) 0%, var(--bg-base) 100%);
  border-color: var(--gold-dim);
  padding: 1.1rem 1.25rem;
}
.agent--feature .agent-name { color: var(--fg); font-size: 1.15rem; }
.agent--feature .agent-glyph { color: var(--gold-bright); font-size: 1.05rem; }

.agent--compact {
  grid-template-columns: auto 1fr;
  padding: 0.7rem 0.95rem;
}
.agent--compact .agent-name { font-size: 0.95rem; }

.agent--mini {
  grid-template-columns: auto 1fr;
  gap: 0.6rem;
  padding: 0.6rem 0.85rem;
  border-color: transparent;
  background: transparent;
  border-bottom: 1px solid var(--line-faint);
}
.agent--mini:hover {
  background: transparent;
  border-color: transparent;
  border-bottom-color: var(--gold-dim);
  transform: none;
}
.agent--mini .agent-glyph { color: var(--gold-dim); font-size: 0.7rem; }
.agent--mini .agent-name { font-size: 0.85rem; color: var(--fg-soft); }

.agent-flag {
  align-self: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--veto);
  color: var(--veto);
  background: rgba(196, 107, 79, 0.06);
}

@media (max-width: 720px) {
  .tier-header {
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "rank count"
      "title title";
    gap: 1rem;
  }
  .tier-rank { grid-area: rank; }
  .tier-count { grid-area: count; }
  .tier-titleblock { grid-area: title; }
}

/* SKILLS ----- */

.section-skills {
  background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-deepest) 100%);
  max-width: none;
  border-top: 1px solid var(--line-faint);
  border-bottom: 1px solid var(--line-faint);
}
.section-skills > * {
  max-width: var(--max);
  margin-left: auto; margin-right: auto;
}

.skills-legend {
  display: flex; gap: 2rem; flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-mute);
  margin: 0 0 3rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.legend-item { display: inline-flex; align-items: center; gap: 0.65rem; }
.legend-dot {
  width: 8px; height: 8px;
  display: inline-block;
  transform: rotate(45deg);
}
.legend-dot--deep { background: var(--gold); }
.legend-dot--stub { background: transparent; border: 1px solid var(--gold-dim); }

.skills-clusters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.cluster {
  padding: 1.85rem 1.6rem 2rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-base);
  transition: background 0.4s var(--ease-out);
}
.cluster:hover { background: var(--bg-surface); }

.cluster-head {
  display: flex; align-items: baseline; gap: 0.85rem;
  margin-bottom: 1.4rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}
.cluster-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
}
.cluster-name {
  font-size: 1rem;
  letter-spacing: 0.12em;
  margin: 0;
  color: var(--fg);
}

.cluster-list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 0.5rem;
}
.cluster-list li {
  display: inline-flex; align-items: center; gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--fg-soft);
  position: relative;
  transition: color 0.25s var(--ease-out), padding-left 0.3s var(--ease-out);
}
.cluster-list li::before {
  content: "○";
  display: inline-block;
  font-size: 0.55rem;
  color: var(--gold-dim);
  width: 10px;
}
.cluster-list li.deep::before {
  content: "◆";
  color: var(--gold);
  font-size: 0.7rem;
}
.cluster-list li:hover {
  color: var(--gold-bright);
  padding-left: 4px;
}
.cluster-list code {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: inherit;
  background: transparent;
}

/* FOUNDATION ----- */

.section-foundation { border-top: 1px solid var(--line-faint); }

.alloc {
  margin: 1rem 0 5rem;
  padding: 2.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  position: relative;
}
.alloc::before {
  content: ""; position: absolute;
  top: -1px; left: -1px;
  width: 60px; height: 60px;
  border-top: 2px solid var(--gold);
  border-left: 2px solid var(--gold);
}
.alloc::after {
  content: ""; position: absolute;
  bottom: -1px; right: -1px;
  width: 60px; height: 60px;
  border-bottom: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
}

.alloc-header { margin-bottom: 2.5rem; }
.alloc-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  display: block;
  margin-bottom: 0.6rem;
}
.alloc-title {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  margin: 0 0 0.7rem;
  letter-spacing: 0.04em;
  color: var(--fg);
}
.alloc-lede {
  margin: 0;
  color: var(--fg-soft);
  max-width: 60ch;
}

.alloc-diagram {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: 1fr auto;
  grid-template-areas: "y plot" ". x";
  gap: 1rem;
  margin: 2.5rem 0;
}
.alloc-axis {
  display: flex; flex-direction: column; gap: 0.3rem;
}
.alloc-axis--y {
  grid-area: y;
  align-self: center;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  text-align: center;
}
.alloc-axis--x {
  grid-area: x;
  text-align: center;
  margin-top: 0.5rem;
}
.alloc-axis-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}
.alloc-axis-sub {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-mute);
}
.alloc-plot {
  grid-area: plot;
  background: var(--bg-deepest);
  border: 1px solid var(--line);
  padding: 0.5rem;
}

.alloc-formula {
  margin: 0;
  padding: 1.5rem 1.75rem;
  background: var(--bg-deepest);
  border-left: 2px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--fg);
  white-space: pre;
  overflow-x: auto;
}
.formula-comment { color: var(--fg-mute); }
.formula-fn { color: var(--gold); }
.formula-var { color: var(--cool); }

.facilities { margin: 5rem 0; }

.facility-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.facility {
  position: relative;
  display: flex; gap: 1.5rem;
  padding: 1.85rem 1.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  transition: border-color 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}
.facility:hover {
  border-color: var(--gold-dim);
  transform: translateY(-3px);
}
.facility-letter {
  font-family: var(--font-display);
  font-size: 3.6rem;
  font-weight: 900;
  color: var(--gold);
  line-height: 0.85;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  width: 90px;
  display: flex; align-items: flex-start; justify-content: center;
  border-right: 1px solid var(--line);
  padding-right: 1rem;
}
.facility--construction .facility-letter { color: var(--fg-mute); }
.facility-meta { display: flex; flex-direction: column; gap: 0.35rem; }
.facility-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}
.facility--construction .facility-eyebrow { color: var(--fg-mute); }
.facility-name {
  font-size: 1.15rem;
  margin: 0;
  letter-spacing: 0.05em;
  color: var(--fg);
}
.facility-sub { margin: 0; color: var(--fg-soft); font-size: 0.88rem; }
.facility-pattern {
  margin: 0.4rem 0 0;
  font-size: 0.85rem;
  color: var(--fg-mute);
}
.facility-pattern code {
  background: var(--bg-deepest);
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--line);
  color: var(--gold);
  margin-left: 0.35rem;
}

.scale-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}
@media (max-width: 900px) {
  .scale-grid { grid-template-columns: 1fr; }
}

.scale-card {
  padding: 2rem 1.85rem;
  background: var(--bg-surface);
  border: 1px solid var(--line);
  display: flex; flex-direction: column;
  gap: 0.5rem;
}
.scale-card--big {
  background: linear-gradient(135deg, var(--bg-raised) 0%, var(--bg-surface) 100%);
  border-color: var(--line-strong);
}
.scale-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.6rem;
}
.scale-num {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  color: var(--fg);
  line-height: 0.95;
}
.scale-card--big .scale-num { color: var(--gold); }
.scale-unit {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-mute);
  margin-bottom: 0.65rem;
}
.scale-body {
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  color: var(--fg-soft);
  line-height: 1.55;
}

.species-list {
  list-style: none; margin: 0.5rem 0 0; padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem 1rem;
}
.species-list li {
  position: relative;
  padding-left: 1rem;
  font-size: 0.88rem;
  color: var(--fg-soft);
}
.species-list li::before {
  content: "·";
  position: absolute; left: 0;
  color: var(--gold);
  font-weight: 800;
}

/* HARD RULES ----- */

.section-rules {
  background: var(--bg-deepest);
  max-width: none;
  padding-top: var(--section-y);
  padding-bottom: var(--section-y);
  border-top: 1px solid var(--gold-dim);
  border-bottom: 1px solid var(--gold-dim);
  position: relative;
  overflow: hidden;
}
.section-rules::before {
  content: ""; position: absolute; inset: 0;
  background:
    repeating-linear-gradient(45deg, transparent, transparent 24px, rgba(212,168,95,0.03) 24px, rgba(212,168,95,0.03) 25px);
  pointer-events: none;
}
.section-rules > * {
  position: relative;
  max-width: var(--max);
  margin-left: auto; margin-right: auto;
}

.section-marker--inverted .section-num,
.section-marker--inverted .section-label {
  color: var(--gold);
}

.rules-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--gold-dim);
}
.rule {
  display: grid;
  grid-template-columns: 100px 1fr 1fr;
  gap: clamp(1rem, 3vw, 3rem);
  align-items: start;
  padding: clamp(2.5rem, 5vw, 4.5rem) 0;
  border-bottom: 1px solid var(--gold-dim);
}
.rule-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.22em;
  color: var(--gold);
  padding-top: 0.7rem;
}
.rule-text {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.5vw, 4.4rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.005em;
  line-height: 0.92;
  margin: 0;
  color: var(--fg);
}
.rule-fine {
  margin: 0;
  padding-top: 0.85rem;
  font-size: 0.95rem;
  color: var(--fg-soft);
  line-height: 1.55;
  max-width: 42ch;
  border-top: 1px solid var(--gold-dim);
}
@media (max-width: 800px) {
  .rule { grid-template-columns: auto 1fr; grid-template-areas: "num text" ". fine"; }
  .rule-num { grid-area: num; }
  .rule-text { grid-area: text; }
  .rule-fine { grid-area: fine; padding-top: 1.5rem; }
}

/* GET STARTED ----- */

.section-start { border-top: 1px solid var(--line-faint); }

.quickstart {
  list-style: none; margin: 0 0 3rem; padding: 0;
  display: flex; flex-direction: column;
  gap: 1.25rem;
}
.quickstart li {
  display: grid;
  grid-template-columns: 80px 280px 1fr;
  gap: clamp(1rem, 2.5vw, 2.5rem);
  align-items: center;
  padding: 1.85rem clamp(1.25rem, 3vw, 2.25rem);
  background: var(--bg-surface);
  border: 1px solid var(--line);
  position: relative;
  transition: border-color 0.4s var(--ease-out);
}
.quickstart li:hover { border-color: var(--gold-dim); }
.qs-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
}
.qs-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-mute);
  display: block;
  margin-bottom: 0.4rem;
}
.qs-title {
  font-size: 1.3rem;
  margin: 0;
  letter-spacing: 0.04em;
  color: var(--fg);
}
.qs-code {
  margin: 0;
  padding: 1rem 1.25rem;
  background: var(--bg-deepest);
  border-left: 2px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--fg);
  overflow-x: auto;
  white-space: pre;
}
.cmd-prompt { color: var(--gold); margin-right: 0.65rem; user-select: none; }

@media (max-width: 800px) {
  .quickstart li { grid-template-columns: auto 1fr; grid-template-areas: "num meta" "code code"; }
  .qs-num { grid-area: num; }
  .qs-meta { grid-area: meta; }
  .qs-code { grid-area: code; margin-top: 0.5rem; }
}

.start-cta {
  display: flex; flex-wrap: wrap; gap: 1rem;
  margin-top: 2rem;
}

/* ----------------------------------------------- FOOTER */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-deepest);
  padding: 4.5rem var(--gutter) 2rem;
  position: relative;
}
.site-footer::before {
  content: ""; position: absolute;
  top: -1px; left: 50%; transform: translateX(-50%);
  width: 80px; height: 1px;
  background: var(--gold);
}

.footer-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.6fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--line-faint);
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2.5rem; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand {
  display: flex; align-items: center; gap: 0.85rem;
  color: var(--gold);
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 1.25rem;
  font-weight: 600;
}
.footer-col ul {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 0.6rem;
}
.footer-col a {
  color: var(--fg-soft);
  font-size: 0.92rem;
  transition: color 0.25s var(--ease-out);
}
.footer-col a:hover { color: var(--gold-bright); }

.footer-disclaimer p {
  margin: 0 0 0.85rem;
  font-size: 0.85rem;
  color: var(--fg-mute);
  line-height: 1.6;
}
.footer-license { color: var(--fg-dim); font-size: 0.78rem; }

.footer-bottom {
  max-width: var(--max);
  margin: 0 auto;
  padding-top: 1.8rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.footer-stamp { color: var(--gold); }
.footer-copy { color: var(--fg-dim); }

/* ----------------------------------------------- REVEAL ANIMATIONS */

[data-reveal-section] [data-reveal],
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease-out), transform 1s var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* hero-loaded reveals are handled by .is-loaded chain on body */
.is-loaded .site-header[data-reveal],
.is-loaded .hero-classification[data-reveal],
.is-loaded .hero-title[data-reveal],
.is-loaded .hero-stats[data-reveal],
.is-loaded .hero-cta[data-reveal] {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .hero-title .line span { transform: none !important; }
  .hero-orbit-spin { animation: none !important; }
}

/* ----------------------------------------------- INTERACTIONS */

.site-header {
  transition: padding 0.35s var(--ease-out), background 0.35s var(--ease-out), border-color 0.35s var(--ease-out);
}
.site-header.is-scrolled {
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
  background: linear-gradient(180deg, rgba(6,7,10,0.95) 0%, rgba(6,7,10,0.85) 100%);
  border-bottom-color: var(--line);
}

.section-marker .section-num {
  display: inline-block;
  transition: color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.section-marker.is-pulsed .section-num {
  animation: pulse-num 0.7s var(--ease-out);
}
@keyframes pulse-num {
  0%   { color: var(--gold); transform: translateX(0); }
  40%  { color: var(--gold-bright); transform: translateX(4px); }
  100% { color: var(--gold); transform: translateX(0); }
}

/* ----------------------------------------------- FOCUS */

a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

/* =============================================================
   SVG THEMING — class-driven so light/dark themes can repaint
   inline SVG without rebuilding the markup.
   ============================================================= */

/* hero orbit */
.hero-orbit { color: var(--gold); }
.orbit-ring { fill: none; stroke: var(--line); stroke-width: 1; }
.orbit-ring--mid { stroke: var(--line-strong); opacity: 0.55; }
.orbit-ring--inner { stroke: var(--line-strong); opacity: 0.4; }
.orbit-ring--grad { stroke: url(#orbitGrad); }
.orbit-core { fill: var(--gold); }
.orbit-hole { fill: var(--bg-base); }
.hero-orbit-ticks line { stroke: var(--gold); stroke-width: 1.5; }
.orbit-outer { fill: none; stroke: var(--line); stroke-width: 1; stroke-dasharray: 2 12; }

/* allocation diagram */
.alloc-svg text { font-family: var(--font-mono); }
.alloc-grid line { stroke: var(--line); stroke-width: 0.5; }
.alloc-line-protocol { stroke: var(--gold); stroke-width: 2; }
.alloc-line-arcac    { stroke: var(--cool); stroke-width: 2; }
.alloc-feasible      { fill: var(--gold); fill-opacity: 0.06; stroke: var(--gold); stroke-opacity: 0.2; stroke-dasharray: 4 3; }
.alloc-text-protocol { fill: var(--gold); font-size: 10px; }
.alloc-text-arcac    { fill: var(--cool); font-size: 10px; }
.alloc-text-feasible { fill: var(--fg); font-family: var(--font-display); font-size: 22px; font-weight: 800; letter-spacing: 2px; }
.alloc-text-feasible-sub { fill: var(--fg-mute); font-size: 9px; }
.alloc-text-corner   { fill: var(--fg-dim); font-size: 9px; }
.alloc-corner-ticks line { stroke: var(--gold); stroke-width: 1.5; }

/* =============================================================
   LIGHT THEME — Director-preferred. Same architectural language,
   inverted lightness, deeper bronze-gold for AA contrast on cream.
   ============================================================= */

[data-theme="light"] {
  /* surfaces — inverted lightness; raised = lighter (whiter) */
  --bg-deepest:   #E5DDC8;
  --bg-base:      #F5F0E0;
  --bg-surface:   #FAF6EA;
  --bg-raised:    #FFFFFF;

  /* lines */
  --line-faint:   #E5DECC;
  --line:         #CFC7AC;
  --line-strong:  #A89F84;

  /* foreground — deep ink */
  --fg:           #15151A;
  --fg-soft:      #3A3A42;
  --fg-mute:      #66666E;
  --fg-dim:       #92929A;
  --fg-faint:     #B5B5BA;

  /* accents — deeper bronze-gold for contrast on cream */
  --gold:         #A87333;
  --gold-bright:  #C8923F;
  --gold-dim:     #6F4F1E;
  --gold-glow:    rgba(168, 115, 51, 0.18);

  --cool:         #1B6779;
  --veto:         #9A3D24;
}

/* atmospherics flip for light theme */
[data-theme="light"] .grain {
  opacity: 0.045;
  mix-blend-mode: multiply;
}

[data-theme="light"] .scanlines {
  opacity: 0.18;
  background-image: linear-gradient(180deg, rgba(0,0,0,0.022) 0%, rgba(0,0,0,0.022) 1px, transparent 1px, transparent 3px);
}

[data-theme="light"] .vignette {
  background: radial-gradient(ellipse 130% 90% at 50% 50%, transparent 0%, transparent 60%, rgba(120, 95, 50, 0.08) 100%);
}

[data-theme="light"] .hero-grid-bg {
  opacity: 0.7;
  background-image:
    linear-gradient(0deg, transparent 49.5%, rgba(168,115,51,0.06) 50%, transparent 50.5%),
    linear-gradient(90deg, transparent 49.5%, rgba(168,115,51,0.06) 50%, transparent 50.5%),
    linear-gradient(0deg, rgba(0,0,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
}

/* header — translucent cream */
[data-theme="light"] .site-header {
  background: linear-gradient(180deg, rgba(245,240,224,0.92) 0%, rgba(245,240,224,0.65) 100%);
  border-bottom-color: var(--line-faint);
}
[data-theme="light"] .site-header.is-scrolled {
  background: linear-gradient(180deg, rgba(245,240,224,0.98) 0%, rgba(245,240,224,0.88) 100%);
}

/* the diagonal warning stripes in the hard-rules section */
[data-theme="light"] .section-rules::before {
  background:
    repeating-linear-gradient(45deg, transparent, transparent 24px, rgba(168,115,51,0.06) 24px, rgba(168,115,51,0.06) 25px);
}

/* selection */
[data-theme="light"] ::selection {
  background: var(--gold);
  color: var(--bg-raised);
}

/* primary button on light needs explicit text contrast */
[data-theme="light"] .btn-primary { color: var(--bg-raised); }
[data-theme="light"] .btn-primary:hover { color: var(--bg-raised); }

/* warm shadows on hover — gives light theme depth */
[data-theme="light"] .r-card:hover {
  box-shadow: 0 18px 40px -22px rgba(80, 60, 20, 0.28), 0 4px 12px -6px rgba(80, 60, 20, 0.12);
}
[data-theme="light"] .facility:hover {
  box-shadow: 0 14px 32px -18px rgba(80, 60, 20, 0.22);
}
[data-theme="light"] .quickstart li:hover {
  box-shadow: 0 14px 32px -18px rgba(80, 60, 20, 0.18);
}

/* tier cards visibly raised in light theme */
[data-theme="light"] .tier {
  background: var(--bg-raised);
  box-shadow: 0 1px 0 rgba(80,60,20,0.04), 0 8px 22px -16px rgba(80,60,20,0.18);
}

/* alloc card raised */
[data-theme="light"] .alloc {
  background: var(--bg-raised);
}

/* agent rows — inverted relationship: in light, base is lighter than surface so we
   need to push agents to a slightly darker tier-internal tone for "inset" feel */
[data-theme="light"] .agent {
  background: var(--bg-base);
  border-color: var(--line);
}
[data-theme="light"] .agent:hover {
  background: var(--bg-deepest);
  border-color: var(--line-strong);
}
[data-theme="light"] .agent--feature {
  background: linear-gradient(90deg, var(--bg-deepest) 0%, var(--bg-base) 100%);
  border-color: var(--gold-dim);
}

/* code-style inset blocks */
[data-theme="light"] .qs-code,
[data-theme="light"] .alloc-formula {
  background: var(--bg-deepest);
}
[data-theme="light"] .facility-pattern code {
  background: var(--bg-deepest);
}

/* skills section gradient direction stays — but uses light tones now */
[data-theme="light"] .section-skills {
  background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-deepest) 100%);
}

/* footer */
[data-theme="light"] .site-footer {
  background: var(--bg-deepest);
}

/* scale-card big */
[data-theme="light"] .scale-card--big {
  background: linear-gradient(135deg, var(--bg-raised) 0%, var(--bg-surface) 100%);
}

/* feasible region needs more visible fill on cream */
[data-theme="light"] .alloc-feasible {
  fill-opacity: 0.10;
  stroke-opacity: 0.4;
}

/* hard-rules section — keep contrast: deepest cream bg with gold-dim borders */
[data-theme="light"] .section-rules {
  background: var(--bg-deepest);
  border-top-color: var(--gold-dim);
  border-bottom-color: var(--gold-dim);
}

/* =============================================================
   THEME TOGGLE — segmented control inspired by tactical mode
   selectors. Both options visible; active gets gold indicator bar.
   ============================================================= */

.header-tools {
  display: flex; align-items: center; gap: 0.85rem;
}

.theme-toggle {
  position: relative;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 0;
  font-family: var(--font-mono);
  transition: border-color 0.3s var(--ease-out);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.theme-toggle:hover { border-color: var(--gold); }

.theme-track {
  position: relative;
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  align-items: stretch;
}

.theme-opt {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.45rem;
  padding: 0.55rem 0.85rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-mute);
  cursor: pointer;
  transition: color 0.3s var(--ease-out);
  position: relative;
  z-index: 1;
}
.theme-opt svg { transition: opacity 0.3s var(--ease-out); opacity: 0.55; }

[data-theme="dark"]  .theme-opt--dark,
[data-theme="light"] .theme-opt--light {
  color: var(--gold);
}
[data-theme="dark"]  .theme-opt--dark svg,
[data-theme="light"] .theme-opt--light svg {
  opacity: 1;
}

.theme-indicator {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50%;
  height: 2px;
  background: var(--gold);
  transition: transform 0.4s var(--ease-out);
  pointer-events: none;
}
[data-theme="light"] .theme-indicator { transform: translateX(100%); }

@media (max-width: 540px) {
  .theme-opt span { display: none; }
  .theme-opt { padding: 0.55rem 0.65rem; }
}

/* =============================================================
   SMOOTH THEME TRANSITIONS — applied only after first paint via
   .theme-transitioning class on <html>. Removed shortly after so
   it doesn't slow other interactions.
   ============================================================= */

.theme-transitioning,
.theme-transitioning *,
.theme-transitioning *::before,
.theme-transitioning *::after {
  transition: background-color 0.32s var(--ease-out),
              color 0.32s var(--ease-out),
              border-color 0.32s var(--ease-out),
              fill 0.32s var(--ease-out),
              stroke 0.32s var(--ease-out),
              box-shadow 0.32s var(--ease-out),
              opacity 0.32s var(--ease-out) !important;
}

/* ----------------------------------------------- PRINT */

@media print {
  .site-header, .hero-orbit, .grain, .scanlines, .vignette, .hero-scroll, .start-cta, .footer-grid a { display: none !important; }
  body { background: white; color: black; }
}