/* ============================================================
   PHYGITAL NEXUS — main.css
   TJ Yang Portfolio 2026 Q3
   Design System: Tokens → Grid → Typography → Components
   ============================================================ */

/* ── 0. Google Fonts Import ── */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600&display=swap');

/* ── 1. Design Tokens ── */
:root {
  /* Colors */
  --color-bone:        #F9F9F6;
  --color-obsidian:    #111111;
  --color-bronze:      #8A7968;
  --color-bronze-dim:  rgba(138, 121, 104, 0.15);
  --color-bronze-line: rgba(138, 121, 104, 0.4);
  --color-border:      rgba(17, 17, 17, 0.10);
  --color-border-med:  rgba(17, 17, 17, 0.18);
  --color-surface:     rgba(249, 249, 246, 0.85);
  --color-glass:       rgba(249, 249, 246, 0.60);
  --color-text-primary: #111111;
  --color-text-secondary: rgba(17, 17, 17, 0.55);
  --color-text-tertiary:  rgba(17, 17, 17, 0.35);

  --hero-overlay-mid:  rgba(249, 249, 246, 0.40);
  --hero-overlay-top:  rgba(249, 249, 246, 0.80);

  /* Background & Foreground */
  --bg:  var(--color-bone);
  --fg:  var(--color-obsidian);

  /* Typography */
  --font-display: 'Syne', 'Didot', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  /* Type Scale */
  --text-xs:   0.6875rem;   /* 11px */
  --text-sm:   0.8125rem;   /* 13px */
  --text-base: 1rem;        /* 16px */
  --text-md:   1.125rem;    /* 18px */
  --text-lg:   1.375rem;    /* 22px */
  --text-xl:   1.75rem;     /* 28px */
  --text-2xl:  2.5rem;      /* 40px */
  --text-3xl:  3.75rem;     /* 60px */
  --text-4xl:  5.5rem;      /* 88px */
  --text-hero: clamp(3.5rem, 9vw, 9rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --nav-h:       4rem;
  --container:   1440px;
  --gutter:      clamp(1.5rem, 5vw, 5rem);
  --col-gap:     1.5rem;

  /* Motion */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-expo:  cubic-bezier(0.7, 0, 0.84, 0);
  --ease-spring:   cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-silk:     cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --dur-fast:      0.18s;
  --dur-med:       0.42s;
  --dur-slow:      0.72s;
  --dur-enter:     1s;

  /* Radius */
  --radius-sm:  2px;
  --radius-md:  6px;
  --radius-lg:  12px;

  /* Z-layers */
  --z-canvas:  -1;
  --z-content:  1;
  --z-nav:     100;
  --z-cursor:  9999;
  --z-overlay: 200;
}

/* ── Dark Theme Override ── */
[data-theme="dark"] {
  --color-border:        rgba(249, 249, 246, 0.10);
  --color-border-med:    rgba(249, 249, 246, 0.18);
  --color-surface:       rgba(17, 17, 17, 0.85);
  --color-glass:         rgba(17, 17, 17, 0.60);
  --color-text-primary:  #F9F9F6;
  --color-text-secondary: rgba(249, 249, 246, 0.55);
  --color-text-tertiary:  rgba(249, 249, 246, 0.30);
  --color-bronze-dim:    rgba(138, 121, 104, 0.2);
  --hero-overlay-mid:    rgba(17, 17, 17, 0.40);
  --hero-overlay-top:    rgba(17, 17, 17, 0.80);
  --bg:  var(--color-obsidian);
  --fg:  var(--color-bone);
}

/* ── 2. Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--fg);
  background-color: var(--bg);
  overflow-x: hidden;
  transition: background-color var(--dur-slow) var(--ease-silk),
              color var(--dur-slow) var(--ease-silk);
}

a { color: inherit; text-decoration: none; cursor: pointer; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
ul, ol { list-style: none; }
svg { display: block; }

/* ── 3. Custom Cursor ── */
#cursor-dot {
  position: fixed;
  top: 0; left: 0;
  width: 8px; height: 8px;
  background: var(--fg);
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%, -50%);
  transition: background var(--dur-fast), transform var(--dur-fast) var(--ease-spring),
              width var(--dur-fast) var(--ease-spring), height var(--dur-fast) var(--ease-spring);
  will-change: transform;
}

#cursor-ring {
  position: fixed;
  top: 0; left: 0;
  width: 40px; height: 40px;
  border: 1px solid var(--fg);
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%, -50%);
  transition: width 0.35s var(--ease-out-expo), height 0.35s var(--ease-out-expo),
              border-color var(--dur-slow), background var(--dur-med),
              mix-blend-mode var(--dur-fast);
  will-change: transform, width, height;
  opacity: 0.7;
}

body.cursor-hover #cursor-dot {
  transform: translate(-50%, -50%) scale(0.4);
  background: var(--color-bronze);
}

body.cursor-hover #cursor-ring {
  width: 80px;
  height: 80px;
  mix-blend-mode: difference;
  border-color: var(--color-bone);
  opacity: 1;
}

body.cursor-click #cursor-dot {
  transform: translate(-50%, -50%) scale(2);
}
body.cursor-click #cursor-ring {
  width: 30px; height: 30px;
}

/* ── 4. Canvas Backdrop ── */
#nexus-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: var(--z-canvas);
  pointer-events: none;
  opacity: 0.55;
  transition: opacity var(--dur-slow);
}
[data-theme="dark"] #nexus-canvas { opacity: 0.3; }

/* ── 5. Navigation ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-med) var(--ease-silk),
              background var(--dur-med) var(--ease-silk),
              backdrop-filter var(--dur-med);
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
  background: var(--color-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
}

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__logo-mark {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-bronze);
  display: inline-block;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--dur-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--color-bronze);
  transition: width var(--dur-med) var(--ease-out-expo);
}

.nav__link:hover,
.nav__link.active {
  color: var(--fg);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__theme-btn {
  width: 36px; height: 20px;
  border-radius: 10px;
  background: var(--color-border-med);
  border: 1px solid var(--color-border);
  position: relative;
  transition: background var(--dur-med);
  flex-shrink: 0;
}

.nav__theme-btn::after {
  content: '';
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--fg);
  transition: transform var(--dur-med) var(--ease-spring);
}

[data-theme="dark"] .nav__theme-btn::after {
  transform: translateX(16px);
}

.nav__availability {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__availability-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #4CAF82;
  animation: pulse-dot 2s ease-in-out infinite;
}

/* ── 6. Layout Utilities ── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section {
  padding: var(--space-32) 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-bronze);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.section-label::before {
  content: '';
  display: block;
  width: 24px; height: 1px;
  background: var(--color-bronze);
}

.section-number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-right: var(--space-2);
}

/* ── 7. Hero Section (#home) ── */
#home {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-top: var(--nav-h);
  overflow: hidden;
}

.hero__container {
  padding: var(--space-16) var(--gutter) var(--space-16);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: flex-end;
  max-width: var(--container);
  width: 100%;
  margin: 0 auto;
}

.hero__left { grid-column: 1 / 2; }
.hero__right {
  grid-column: 2 / 3;
  align-self: flex-end;
  padding-bottom: var(--space-4);
}

.hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hero__eyebrow-line {
  display: inline-block;
  width: 30px; height: 1px;
  background: var(--color-bronze);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: var(--space-8);
  overflow: hidden;
}

.hero__title-word {
  display: block;
  overflow: hidden;
}

.hero__title-inner {
  display: block;
  transform: translateY(110%);
  transition: transform var(--dur-enter) var(--ease-out-expo);
}

.hero__title-inner.revealed {
  transform: translateY(0);
}

.hero__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  max-width: 38ch;
  line-height: 1.7;
  margin-bottom: var(--space-12);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease-silk) 0.6s,
              transform var(--dur-slow) var(--ease-silk) 0.6s;
}

.hero__subtitle.revealed { opacity: 1; transform: translateY(0); }

.hero__cta-group {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease-silk) 0.8s,
              transform var(--dur-slow) var(--ease-silk) 0.8s;
}

.hero__cta-group.revealed { opacity: 1; transform: translateY(0); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--fg);
  padding: var(--space-4) var(--space-8);
  border: 1px solid transparent;
  transition: background var(--dur-fast), color var(--dur-fast),
              transform var(--dur-fast) var(--ease-spring),
              box-shadow var(--dur-fast);
}

.btn-primary:hover {
  background: var(--color-bronze);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(138, 121, 104, 0.35);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  position: relative;
  padding-bottom: 2px;
}

.btn-ghost::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 1px;
  background: var(--color-border-med);
  transition: background var(--dur-fast);
}

.btn-ghost:hover { color: var(--fg); }
.btn-ghost:hover::after { background: var(--fg); }

.btn-arrow {
  display: inline-flex;
  align-items: center;
  transition: transform var(--dur-fast) var(--ease-spring);
}

.btn-primary:hover .btn-arrow { transform: translateX(4px); }
.btn-ghost:hover .btn-arrow { transform: translateX(4px); }

/* Hero Stats */
.hero__stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  opacity: 0;
  transform: translateX(20px);
  transition: opacity var(--dur-slow) var(--ease-silk) 1s,
              transform var(--dur-slow) var(--ease-silk) 1s;
}

.hero__stats.revealed { opacity: 1; transform: translateX(0); }

.hero__stat {
  border-left: 1px solid var(--color-border);
  padding-left: var(--space-6);
}

.hero__stat-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--fg);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.hero__stat-value span {
  color: var(--color-bronze);
}

.hero__stat-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

/* Hero Scroll Indicator */
.hero__scroll {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  opacity: 0;
  animation: fade-in-scroll 1s var(--ease-silk) 1.5s forwards;
}

.hero__scroll-label {
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--color-bronze), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

/* Hero Project Feature Card */
.hero__feature-card {
  position: relative;
  margin-top: var(--space-12);
  width: 100%;
  height: 55vh;
  min-height: 360px;
  max-height: 600px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-obsidian);
  display: block;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity var(--dur-slow) var(--ease-silk) 1.2s,
              transform var(--dur-slow) var(--ease-silk) 1.2s;
}

.hero__feature-card.revealed { opacity: 1; transform: translateY(0); }

.hero__feature-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(17,17,17,0.95) 0%,
    rgba(17,17,17,0.5) 50%,
    rgba(138,121,104,0.15) 100%);
  z-index: 1;
}

.hero__feature-img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.6;
  transition: transform 8s var(--ease-silk);
}

.hero__feature-card:hover .hero__feature-img {
  transform: scale(1.04);
}

.hero__feature-content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: var(--space-8);
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: flex-end;
  gap: var(--space-8);
  background: linear-gradient(to top, rgba(17,17,17,0.9) 0%, transparent 100%);
}

.hero__feature-meta {
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-bronze);
  margin-bottom: var(--space-3);
}

.hero__feature-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-bone);
  line-height: 1.15;
}

.hero__feature-metrics {
  display: flex;
  gap: var(--space-6);
}

.hero__metric {
  text-align: right;
}

.hero__metric-value {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--color-bone);
  line-height: 1;
}

.hero__metric-label {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: rgba(249,249,246,0.5);
  text-transform: uppercase;
  margin-top: 2px;
}

.hero__feature-tag {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-bone);
  border: 1px solid rgba(249,249,246,0.25);
  padding: var(--space-2) var(--space-4);
  z-index: 3;
  background: rgba(17,17,17,0.4);
  backdrop-filter: blur(8px);
}

/* ── 8. Work Section (#work) ── */
#work {
  min-height: auto;
  padding: var(--space-32) 0 var(--space-24);
}

.work__header {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: var(--space-16);
  gap: var(--space-8);
}

.work__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--fg);
}

.work__desc {
  max-width: 38ch;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* Tier Label */
.tier-header {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-12) var(--gutter) var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.tier-header__number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-bronze);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.tier-header__title {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  flex: 1;
}

.tier-header__count {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 0.1em;
}

/* ── Tier 1: Deep-Dive Case Study Cards ── */
.case-study-card {
  width: 85vw;
  max-width: 1200px;
  margin: 0 auto var(--space-12);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: width var(--dur-slow) var(--ease-out-expo),
              max-width var(--dur-slow) var(--ease-out-expo),
              box-shadow var(--dur-med) var(--ease-silk);
  position: relative;
  background: var(--bg);
  will-change: width;
}

.case-study-card.in-view {
  width: 95vw;
  box-shadow: 0 24px 80px rgba(17,17,17,0.08);
}

[data-theme="dark"] .case-study-card.in-view {
  box-shadow: 0 24px 80px rgba(0,0,0,0.4);
}

.case-study-card__media {
  position: relative;
  height: 52vh;
  min-height: 300px;
  overflow: hidden;
  background: var(--color-obsidian);
}

.case-study-card__media-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-silk);
  opacity: 0.85;
}

.case-study-card.in-view .case-study-card__media-img {
  transform: scale(0.97);
}

/* Blueprint Toggle overlay */
.blueprint-overlay {
  position: absolute;
  inset: 0;
  background: #0a1628;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s var(--ease-silk);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.blueprint-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.blueprint-grid {
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(82, 160, 220, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(82, 160, 220, 0.15) 1px, transparent 1px);
  background-size: 32px 32px;
  position: absolute;
  inset: 0;
}

.blueprint-content {
  position: relative;
  z-index: 1;
  padding: var(--space-8);
  color: rgba(82, 160, 220, 0.9);
  font-family: 'Courier New', monospace;
  font-size: var(--text-xs);
  line-height: 1.8;
  max-width: 600px;
  width: 90%;
}

.blueprint-content h4 {
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(82, 160, 220, 1);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid rgba(82, 160, 220, 0.3);
  padding-bottom: var(--space-3);
}

.blueprint-content .bp-item {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
  color: rgba(82, 160, 220, 0.75);
}

.blueprint-content .bp-label {
  color: rgba(82, 160, 220, 1);
  min-width: 120px;
  flex-shrink: 0;
}

/* Toggle Button */
.blueprint-toggle-btn {
  position: absolute;
  top: var(--space-6);
  left: var(--space-6);
  z-index: 10;
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-bone);
  background: rgba(17,17,17,0.6);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(249,249,246,0.2);
  padding: var(--space-2) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  transition: background var(--dur-fast), border-color var(--dur-fast);
}

.blueprint-toggle-btn:hover {
  background: rgba(82, 160, 220, 0.2);
  border-color: rgba(82, 160, 220, 0.5);
}

.blueprint-toggle-btn.active {
  background: rgba(82, 160, 220, 0.25);
  border-color: rgba(82, 160, 220, 0.6);
  color: rgba(82, 160, 220, 1);
}

.blueprint-toggle-icon {
  width: 10px; height: 10px;
  border: 1px solid currentColor;
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
}

.blueprint-toggle-icon::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 4px; height: 4px;
  border-radius: 50%;
  background: currentColor;
  transition: transform var(--dur-fast) var(--ease-spring);
}

.blueprint-toggle-btn.active .blueprint-toggle-icon::after {
  transform: translate(-50%, -50%) scale(0);
}

/* Card Body */
.case-study-card__body {
  padding: var(--space-8) var(--space-8) var(--space-8);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-8);
  align-items: flex-start;
  border-top: 1px solid var(--color-border);
}

.case-study-card__meta {
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-bronze);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.case-study-card__meta-sep {
  width: 1px; height: 10px;
  background: var(--color-bronze-line);
  display: inline-block;
}

.case-study-card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--fg);
  margin-bottom: var(--space-4);
}

.case-study-card__tagline {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
  max-width: 55ch;
}

.case-study-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.tag {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: 3px var(--space-3);
  transition: border-color var(--dur-fast), color var(--dur-fast);
}

.tag:hover { border-color: var(--color-bronze); color: var(--color-bronze); }

.case-study-card__metrics {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 160px;
  border-left: 1px solid var(--color-border);
  padding-left: var(--space-8);
}

.card-metric {
  text-align: right;
}

.card-metric__value {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--fg);
  line-height: 1;
}

.card-metric__value .accent { color: var(--color-bronze); }

.card-metric__label {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

/* Case Study Detail: The "Three-Tier" expanded logic */
.case-study-card__detail {
  border-top: 1px solid var(--color-border);
  padding: 0 var(--space-8);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.6s var(--ease-out-expo), padding 0.3s;
}

.case-study-card__detail.expanded {
  max-height: 800px;
  padding: var(--space-8);
}

.detail-section {
  margin-bottom: var(--space-8);
}

.detail-section:last-child { margin-bottom: 0; }

.detail-section__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-bronze);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.detail-section__label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.detail-section__content {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.detail-section__content ul {
  list-style: none;
  margin-top: var(--space-3);
}

.detail-section__content ul li {
  padding: var(--space-2) 0;
  display: flex;
  gap: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.detail-section__content ul li::before {
  content: '—';
  color: var(--color-bronze);
  flex-shrink: 0;
}

.option-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-4);
}

.option-block {
  border: 1px solid var(--color-border);
  padding: var(--space-4);
}

.option-block.rejected {
  opacity: 0.5;
  position: relative;
}

.option-block.rejected::after {
  content: 'REJECTED';
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: rgba(180,60,60,0.8);
  border: 1px solid rgba(180,60,60,0.4);
  padding: 1px 4px;
}

.option-block.selected::after {
  content: 'EXECUTED';
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--color-bronze);
  border: 1px solid var(--color-bronze-line);
  padding: 1px 4px;
}

.option-block { position: relative; }

.option-block__title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--fg);
  margin-bottom: var(--space-2);
}

.option-block__text {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* Expand toggle */
.case-study-card__expand-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-bronze);
  margin-top: var(--space-4);
  padding: 0;
  transition: gap var(--dur-fast);
}

.case-study-card__expand-btn:hover { gap: var(--space-3); }

.expand-icon {
  width: 16px; height: 16px;
  border: 1px solid var(--color-bronze-line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  transition: transform var(--dur-med) var(--ease-spring);
}

.case-study-card__expand-btn[aria-expanded="true"] .expand-icon {
  transform: rotate(45deg);
}

/* ── Tier 2: Adaptability Briefs ── */
.briefs-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.brief-card {
  border: 1px solid var(--color-border);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
  transition: border-color var(--dur-fast), transform var(--dur-med) var(--ease-spring),
              box-shadow var(--dur-med);
  background: var(--bg);
}

.brief-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-bronze), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-med) var(--ease-out-expo);
}

.brief-card:hover {
  border-color: var(--color-border-med);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(17,17,17,0.08);
}

[data-theme="dark"] .brief-card:hover {
  box-shadow: 0 16px 48px rgba(0,0,0,0.3);
}

.brief-card:hover::before { transform: scaleX(1); }

.brief-card__index {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: var(--space-4);
  transition: color var(--dur-med);
  letter-spacing: -0.04em;
}

.brief-card:hover .brief-card__index { color: var(--color-bronze-dim); }

.brief-card__label {
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-bronze);
  margin-bottom: var(--space-3);
}

.brief-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--fg);
  line-height: 1.2;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.brief-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-6);
}

.brief-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-4);
  margin-top: auto;
}

.brief-card__stat {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.brief-card__stat strong {
  color: var(--fg);
  font-weight: 600;
}

/* ── Tier 3: The Lab ── */
.lab-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.lab-card {
  border: 1px solid var(--color-border);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
  background: var(--bg);
  transition: border-color var(--dur-fast), transform var(--dur-med) var(--ease-spring);
}

.lab-card__badge {
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-bone);
  background: var(--color-obsidian);
  padding: 3px var(--space-3);
  display: inline-block;
  margin-bottom: var(--space-6);
}

[data-theme="dark"] .lab-card__badge {
  background: var(--color-bone);
  color: var(--color-obsidian);
}

.lab-card__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
  line-height: 1.2;
}

.lab-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-6);
}

.lab-card__visual {
  height: 120px;
  background: var(--color-bronze-dim);
  border: 1px solid var(--color-bronze-line);
  position: relative;
  overflow: hidden;
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lab-card__visual-text {
  font-family: 'Courier New', monospace;
  font-size: var(--text-xs);
  color: var(--color-bronze);
  letter-spacing: 0.1em;
  text-align: center;
}

.lab-card:hover {
  border-color: var(--color-bronze-line);
  transform: translateY(-4px);
}

/* ── 9. About Section (#about) ── */
#about {
  padding: var(--space-32) 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.about__grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
  align-items: start;
}

.about__left {}
.about__right {}

.about__headline {
  font-family: var(--font-display);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: var(--space-8);
}

.about__headline em {
  font-style: normal;
  color: var(--color-bronze);
}

.about__bio {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: var(--space-8);
  max-width: 50ch;
}

.about__manifesto {
  border-left: 2px solid var(--color-bronze);
  padding-left: var(--space-6);
  margin-bottom: var(--space-8);
}

.about__manifesto-text {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--fg);
  line-height: 1.5;
  letter-spacing: -0.01em;
}

/* Competency Matrix */
.competency-matrix {
  margin-bottom: var(--space-8);
}

.competency-item {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 160px 1fr auto;
  align-items: center;
  gap: var(--space-4);
}

.competency-item__label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.competency-item__bar {
  height: 2px;
  background: var(--color-border);
  position: relative;
  overflow: hidden;
}

.competency-item__fill {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  background: var(--color-bronze);
  width: 0;
  transition: width 1.2s var(--ease-out-expo);
}

.competency-item__fill.animated {
  width: var(--level);
}

.competency-item__value {
  font-size: var(--text-xs);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-bronze);
  letter-spacing: 0.05em;
}

/* Timeline */
.about__timeline {
  position: relative;
  padding-left: var(--space-8);
}

.about__timeline::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-bronze), transparent);
}

.timeline-item {
  margin-bottom: var(--space-8);
  position: relative;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity var(--dur-slow) var(--ease-silk),
              transform var(--dur-slow) var(--ease-silk);
}

.timeline-item.in-view {
  opacity: 1;
  transform: translateX(0);
}

.timeline-item::before {
  content: '';
  position: absolute;
  top: 6px; left: calc(-2rem - 1px);
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--color-bronze);
  transform: translateX(-3px);
  box-shadow: 0 0 0 3px var(--bg);
}

.timeline-item__year {
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  color: var(--color-bronze);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.timeline-item__title {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--fg);
  margin-bottom: var(--space-2);
}

.timeline-item__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ── 10. Connect Section (#connect) ── */
#connect {
  min-height: 100vh;
  padding: var(--space-32) 0;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

#connect::before {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60%;
  background: linear-gradient(to top, var(--color-bronze-dim), transparent);
  z-index: 0;
  pointer-events: none;
}

.connect__grid {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-24);
  align-items: start;
}

.connect__headline {
  font-family: var(--font-display);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: var(--space-6);
}

.connect__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.75;
  max-width: 40ch;
  margin-bottom: var(--space-12);
}

.connect__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.connect__link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--dur-fast), padding-left var(--dur-fast) var(--ease-spring);
}

.connect__link:hover {
  color: var(--fg);
  padding-left: var(--space-3);
}

.connect__link-icon {
  width: 32px; height: 32px;
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  flex-shrink: 0;
  transition: border-color var(--dur-fast), background var(--dur-fast);
}

.connect__link:hover .connect__link-icon {
  border-color: var(--color-bronze);
  background: var(--color-bronze-dim);
}

/* Contact Form */
.contact-form {
  background: var(--bg);
  border: 1px solid var(--color-border);
  padding: var(--space-12);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-group label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border-med);
  padding: var(--space-3) 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--fg);
  outline: none;
  transition: border-color var(--dur-fast);
  appearance: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-bottom-color: var(--color-bronze);
}

.form-group textarea {
  height: 120px;
  resize: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.form-submit {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--fg);
  padding: var(--space-4) var(--space-8);
  border: 1px solid transparent;
  margin-top: var(--space-8);
  transition: background var(--dur-fast), color var(--dur-fast),
              transform var(--dur-fast) var(--ease-spring);
}

.form-submit:hover {
  background: var(--color-bronze);
  transform: translateY(-2px);
}

/* ── 11. Footer ── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) var(--gutter);
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 0.1em;
}

.footer__credit {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 0.1em;
}

/* ── 12. Scroll Progress Bar ── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: var(--color-bronze);
  z-index: calc(var(--z-nav) + 1);
  width: 0%;
  transition: width 0.1s linear;
  transform-origin: left;
}

/* ── 13. Page Loader ── */
#page-loader {
  position: fixed;
  inset: 0;
  background: var(--color-obsidian);
  z-index: 9998;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-8);
  transition: opacity var(--dur-slow) var(--ease-silk),
              visibility var(--dur-slow);
}

#page-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-bone);
}

.loader__bar {
  width: 120px;
  height: 1px;
  background: rgba(249,249,246,0.15);
  position: relative;
  overflow: hidden;
}

.loader__fill {
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: var(--color-bronze);
  animation: loader-slide 1.4s var(--ease-out-expo) forwards;
}

/* ── 14. Reveal Animations (class-based) ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--dur-slow) var(--ease-silk),
              transform var(--dur-slow) var(--ease-silk);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--dur-slow) var(--ease-silk),
              transform var(--dur-slow) var(--ease-silk);
}
.reveal-left.in-view { opacity: 1; transform: translateX(0); }

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--dur-slow) var(--ease-silk),
              transform var(--dur-slow) var(--ease-silk);
}
.reveal-right.in-view { opacity: 1; transform: translateX(0); }

/* Staggered delay helpers */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }
.delay-6 { transition-delay: 0.6s; }

/* ── 15. Utility ── */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  clip: rect(0,0,0,0);
  overflow: hidden;
  white-space: nowrap;
}

.text-bronze { color: var(--color-bronze); }
.text-secondary { color: var(--color-text-secondary); }
.font-display { font-family: var(--font-display); }
.uppercase { text-transform: uppercase; letter-spacing: 0.15em; }
.nowrap { white-space: nowrap; }

/* ── 16. Responsive ── */
@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
  }
  .hero__right { display: none; }
  .about__grid { grid-template-columns: 1fr; gap: var(--space-16); }
  .connect__grid { grid-template-columns: 1fr; gap: var(--space-12); }
  .briefs-grid { grid-template-columns: 1fr 1fr; }
  .lab-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  html { cursor: auto; }
  #cursor-dot, #cursor-ring { display: none; }
  .nav__links { display: none; }
  .nav__availability { display: none; }
  .briefs-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .case-study-card__body { grid-template-columns: 1fr; }
  .case-study-card__metrics {
    flex-direction: row;
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-left: 0;
    padding-top: var(--space-4);
    gap: var(--space-8);
  }
  .card-metric { text-align: left; }
  .option-row { grid-template-columns: 1fr; }
  .hero__feature-metrics { display: none; }
  .work__header { flex-direction: column; align-items: flex-start; }
  .footer { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  :root { --gutter: 1.25rem; }
  .hero__title { font-size: clamp(2.8rem, 12vw, 5rem); }
}

/* ================================================================
   NEW ADDITIONS — Design Enhancement Layer
   Grain · Mobile Nav · Ticker · Capabilities · Footer
   ================================================================ */

/* ── 1. Grain Texture Overlay ── */
#grain {
  position: fixed;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='400' height='400' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-size: 400px 400px;
  opacity: 0.028;
  pointer-events: none;
  z-index: 9990;
  animation: grain 0.8s steps(1) infinite;
}

[data-theme="dark"] #grain { opacity: 0.05; }

/* ── 2. Hero Background Ghost Text ── */
.hero__bg-text {
  position: absolute;
  bottom: 5%;
  right: -3%;
  font-family: var(--font-display);
  font-size: clamp(7rem, 24vw, 22rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(17, 17, 17, 0.05);
  pointer-events: none;
  user-select: none;
  z-index: 0;
  line-height: 1;
  white-space: nowrap;
  overflow: hidden;
  transition: -webkit-text-stroke-color var(--dur-slow);
}

[data-theme="dark"] .hero__bg-text {
  -webkit-text-stroke: 1px rgba(249, 249, 246, 0.055);
}

/* Ensure hero content sits above bg text */
.hero__container { position: relative; z-index: 1; }
.container { position: relative; z-index: 1; }

/* ── 3. Mobile Hamburger Button ── */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
  transition: border-color var(--dur-fast), background var(--dur-fast);
}

.hamburger-btn:hover {
  border-color: var(--color-border-med);
  background: var(--color-bronze-dim);
}

.hamburger-line {
  display: block;
  width: 18px;
  height: 1px;
  background: var(--fg);
  transition: transform 0.38s var(--ease-spring),
              opacity var(--dur-fast),
              width 0.28s var(--ease-out-expo);
  transform-origin: center;
}

.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  width: 0;
}
.hamburger-btn[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ── 4. Mobile Nav Fullscreen Overlay ── */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--color-obsidian);
  z-index: calc(var(--z-nav) + 1);
  display: flex;
  flex-direction: column;
  padding: var(--nav-h) var(--gutter) var(--space-12);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.38s var(--ease-silk),
              visibility 0.38s;
  pointer-events: none;
}

.mobile-nav.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-nav__inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.mobile-nav__links {
  display: flex;
  flex-direction: column;
}

.mobile-nav__link-item {
  overflow: hidden;
  border-top: 1px solid rgba(249, 249, 246, 0.06);
}

.mobile-nav__link-item:last-child {
  border-bottom: 1px solid rgba(249, 249, 246, 0.06);
}

.mobile-nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-family: var(--font-display);
  font-size: clamp(2rem, 8.5vw, 4.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: rgba(249, 249, 246, 0.18);
  padding: clamp(0.65rem, 2vw, 1.1rem) 0;
  transform: translateY(110%);
  transition: transform var(--dur-slow) var(--ease-out-expo),
              color var(--dur-fast);
  cursor: pointer;
  text-decoration: none;
}

.mobile-nav.open .mobile-nav__link {
  transform: translateY(0);
}

.mobile-nav__link-item:nth-child(1) .mobile-nav__link { transition-delay: 0.04s; }
.mobile-nav__link-item:nth-child(2) .mobile-nav__link { transition-delay: 0.09s; }
.mobile-nav__link-item:nth-child(3) .mobile-nav__link { transition-delay: 0.14s; }
.mobile-nav__link-item:nth-child(4) .mobile-nav__link { transition-delay: 0.19s; }

.mobile-nav__link:hover,
.mobile-nav__link.active {
  color: rgba(249, 249, 246, 0.85);
}

.mobile-nav__link-num {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-bronze);
  letter-spacing: 0.2em;
  flex-shrink: 0;
  align-self: flex-start;
  margin-top: 0.5em;
  opacity: 0.8;
}

.mobile-nav__link-arrow {
  margin-left: auto;
  color: rgba(249, 249, 246, 0.12);
  font-size: 1.2rem;
  transition: transform var(--dur-fast) var(--ease-spring),
              color var(--dur-fast);
  flex-shrink: 0;
}

.mobile-nav__link:hover .mobile-nav__link-arrow {
  transform: translate(4px, -4px);
  color: var(--color-bronze);
}

.mobile-nav__footer {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(249, 249, 246, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.mobile-nav__footer-copy {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(249, 249, 246, 0.25);
  line-height: 1.8;
}

.mobile-nav__footer-status {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #4CAF82;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.mobile-nav__status-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: #4CAF82;
  animation: pulse-dot 2s ease-in-out infinite;
}

@media (max-width: 768px) {
  .hamburger-btn { display: flex; }
}

/* ── 5. Ticker Strip ── */
.ticker-strip {
  width: 100%;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  overflow: hidden;
  background: var(--bg);
  position: relative;
  z-index: var(--z-content);
}

.ticker-track {
  display: flex;
  align-items: center;
  width: max-content;
  animation: ticker-scroll 38s linear infinite;
  will-change: transform;
}

.ticker-strip:hover .ticker-track {
  animation-play-state: paused;
}

.ticker-item {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  padding: 0 var(--space-5);
  flex-shrink: 0;
}

.ticker-text {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  white-space: nowrap;
  transition: color var(--dur-fast);
}

.ticker-item:hover .ticker-text { color: var(--color-bronze); }

.ticker-sep {
  color: var(--color-bronze);
  font-size: 0.45rem;
  opacity: 0.55;
  flex-shrink: 0;
}

/* ── 6. Capabilities Section ── */
.capabilities-section {
  border-bottom: 1px solid var(--color-border);
}

.capabilities-header {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-12) var(--gutter) var(--space-8);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-12);
}

.capabilities-header__title {
  font-family: var(--font-display);
  font-size: clamp(var(--text-xl), 3vw, var(--text-2xl));
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
  line-height: 1.1;
}

.capabilities-header__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 42ch;
  line-height: 1.7;
}

.capabilities-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--color-border);
}

.capability-item {
  padding: var(--space-8) var(--space-6);
  border-right: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  transition: background var(--dur-med) var(--ease-silk);
}

.capability-item:last-child { border-right: none; }

.capability-item::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: var(--color-bronze);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-slow) var(--ease-out-expo);
}

.capability-item:hover { background: var(--color-bronze-dim); }
.capability-item:hover::after { transform: scaleX(1); }

.capability-item__number {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-bronze);
  letter-spacing: 0.2em;
  margin-bottom: var(--space-6);
  display: block;
}

.capability-item__glyph {
  font-size: 1.8rem;
  margin-bottom: var(--space-4);
  display: block;
  line-height: 1;
  color: var(--color-bronze);
  opacity: 0.5;
  transition: opacity var(--dur-med);
}

.capability-item:hover .capability-item__glyph { opacity: 0.9; }

.capability-item__title {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 700;
  color: var(--fg);
  line-height: 1.2;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.capability-item__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.capabilities-cta {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-6) var(--gutter);
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid var(--color-border);
}

@media (max-width: 1024px) {
  .capabilities-grid { grid-template-columns: repeat(2, 1fr); }
  .capability-item:nth-child(2) { border-right: none; }
  .capability-item:nth-child(3) { border-top: 1px solid var(--color-border); }
  .capability-item:nth-child(4) { border-top: 1px solid var(--color-border); border-right: none; }
  .capabilities-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .capabilities-grid { grid-template-columns: 1fr; }
  .capability-item { border-right: none; border-top: 1px solid var(--color-border); }
  .capability-item:last-child { border-bottom: 1px solid var(--color-border); }
}

/* ── 7. Improved Footer ── */
.footer {
  border-top: 1px solid var(--color-border);
}

/* Override old footer flex rule */
@media (max-width: 768px) {
  .footer { flex-direction: unset; }
}

.footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-12) var(--gutter) var(--space-8);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
  border-bottom: 1px solid var(--color-border);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.footer__brand-tagline {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 0.08em;
  line-height: 1.75;
}

.footer__nav-title {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
  display: block;
}

.footer__nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__nav-link {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--dur-fast), padding-left var(--dur-fast) var(--ease-spring);
  cursor: pointer;
}

.footer__nav-link:hover {
  color: var(--fg);
  padding-left: var(--space-3);
}

.footer__bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-4) var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.footer__copy,
.footer__built {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 0.08em;
}

@media (max-width: 768px) {
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }
  .footer__bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }
}

/* ── 8. Dark Mode Polish ── */
[data-theme="dark"] .nav__theme-btn {
  background: rgba(249, 249, 246, 0.08);
}

[data-theme="dark"] .hamburger-btn {
  border-color: rgba(249, 249, 246, 0.12);
}

[data-theme="dark"] .ticker-strip {
  background: var(--bg);
}

[data-theme="dark"] .capability-item:hover {
  background: rgba(138, 121, 104, 0.12);
}

[data-theme="dark"] .hero__feature-card {
  border-color: rgba(249, 249, 246, 0.08);
}

[data-theme="dark"] .brief-card:hover {
  background: rgba(249, 249, 246, 0.02);
}

/* ── 9. Select element custom arrow ── */
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238A7968'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0 center;
  padding-right: var(--space-6);
  cursor: pointer;
}

[data-theme="dark"] .form-group select option {
  background: var(--color-obsidian);
  color: var(--color-bone);
}

/* ── 10. Scroll-triggered count-up targets ── */
.stat-counter { display: inline; }

/* ── 11. Hero feature card label animation ── */
.hero__feature-meta {
  transform: translateY(4px);
  opacity: 0.8;
  transition: transform var(--dur-med) var(--ease-spring),
              opacity var(--dur-med);
}

.hero__feature-card:hover .hero__feature-meta {
  transform: translateY(0);
  opacity: 1;
}