/* =============================================================
   Design System — Portfolio · Henry Lee
   Accent: Electric Blue #3B82F6
   Display: Space Grotesk  |  Body: Inter  |  Mono: JetBrains Mono
   ============================================================= */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&family=Instrument+Serif:ital@0;1&display=swap');

/* ── Design Tokens (dark default) ────────────────────────── */
:root {
  /* Backgrounds — slightly violet-tinged near-black for depth */
  --bg:        #050508;
  --bg-elev:   #0E0E15;
  --bg-elev2:  #16161F;

  /* Text */
  --text:      #F0F0F5;
  --text-dim:  #6B6B80;
  --text-mute: #3A3A50;

  /* Hero gradient tail (55% dim of --text) */
  --hero-fade: rgba(240, 240, 245, 0.55);

  /* Accent */
  --accent:        #3B82F6;
  --accent-dim:    rgba(59, 130, 246, 0.15);
  --accent-glow:   rgba(59, 130, 246, 0.25);
  --accent-40:     rgba(59, 130, 246, 0.4);
  --glow:          rgba(59, 130, 246, 0.09);

  /* Accent 2 — amber. Color = meaning: blue is systems/tech,
     amber is impact & people (numbers, leadership, key phrases). */
  --accent2:       #F59E0B;
  --accent2-dim:   rgba(245, 158, 11, 0.14);
  --accent2-glow:  rgba(245, 158, 11, 0.25);
  --accent2-40:    rgba(245, 158, 11, 0.4);
  --glow2:         rgba(245, 158, 11, 0.06);

  /* Borders */
  --border:    #1E1E2A;
  --border-hi: #2A2A3A;

  /* Typography */
  --font-sans:  'Inter', system-ui, sans-serif;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', monospace;

  /* Layout */
  --maxw:       1120px;
  --topbar-h:   64px;

  /* Radius */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;

  /* Transitions */
  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --dur:        200ms;
}

/* Light theme overrides */
:root[data-theme="light"] {
  --bg:        #F8F8FC;
  --bg-elev:   #FFFFFF;
  --bg-elev2:  #F0F0F6;
  --text:      #0F0F1A;
  --text-dim:  #5A5A70;
  --text-mute: #C0C0D0;
  --border:    #E0E0EC;
  --border-hi: #D0D0E0;
  --hero-fade: rgba(15, 15, 26, 0.55);
  --accent-dim: rgba(59, 130, 246, 0.10);
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent-40: rgba(59, 130, 246, 0.35);
  --glow: rgba(59, 130, 246, 0.05);
  --accent2:      #D97706;
  --accent2-dim:  rgba(217, 119, 6, 0.10);
  --accent2-glow: rgba(217, 119, 6, 0.16);
  --accent2-40:   rgba(217, 119, 6, 0.35);
  --glow2:        rgba(217, 119, 6, 0.03);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}

/* Fixed ambient radial glow behind the hero — aurora blob A (blue, slow drift) */
body::before {
  content: '';
  position: fixed;
  top: -22vh;
  left: 50%;
  transform: translateX(-50%);
  width: min(72rem, 100vw);
  height: 60vh;
  background: radial-gradient(ellipse at center, var(--glow) 0%, transparent 70%);
  filter: blur(72px);
  pointer-events: none;
  z-index: -1;
  will-change: transform;
  animation: aurora-drift-a 80s ease-in-out infinite alternate;
}

@keyframes aurora-drift-a {
  0%   { transform: translateX(-50%) translateY(0) scale(1); }
  50%  { transform: translateX(-58%) translateY(5vh) scale(1.12); }
  100% { transform: translateX(-43%) translateY(-3vh) scale(0.94); }
}

/* Full-page SVG-noise grain overlay */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 160px 160px;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

ul { list-style: none; }

/* ── Layout Container ─────────────────────────────────────── */
.container {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

/* Serif accent word inside headings */
.accent-serif {
  font-family: 'Instrument Serif', Georgia, serif;
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.01em;
}

/* ── Section base ─────────────────────────────────────────── */
.section {
  padding-block: clamp(6rem, 12vw, 10rem);
  /* Offset for sticky topbar so anchor nav doesn't hide headings */
  scroll-margin-top: var(--topbar-h);
}

.section-label {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

/* Oversized ghost numeral behind the heading */
.section-num {
  position: absolute;
  top: -1.75rem;
  left: -0.5rem;
  font-family: var(--font-display);
  font-size: clamp(4rem, 8vw, 6.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--text);
  opacity: 0.06;
  pointer-events: none;
  user-select: none;
}

.section-heading {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

/* ── Topbar ───────────────────────────────────────────────── */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--topbar-h);
  background-color: rgba(5, 5, 8, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

:root[data-theme="light"] .topbar {
  background-color: rgba(248, 248, 252, 0.85);
}

.topbar-inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* Logo / brand */
.topbar-logo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}
.topbar-logo:hover { text-decoration: none; opacity: 0.8; }

/* Nav links */
.topbar-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.topbar-nav a {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-dim);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: color var(--dur) var(--ease);
}
/* Underline draws from the left on hover (replaces the bg-pill hover) */
.topbar-nav a::after {
  content: '';
  position: absolute;
  left: 0.6rem;
  right: 0.6rem;
  bottom: 0.15rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 260ms var(--ease);
}
.topbar-nav a:hover {
  color: var(--text);
  text-decoration: none;
}
.topbar-nav a:hover::after { transform: scaleX(1); }

/* Topbar actions */
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* Icon/text buttons in topbar */
.topbar-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-dim);
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  transition: color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
  white-space: nowrap;
}
.topbar-btn:hover {
  color: var(--text);
  border-color: var(--border-hi);
  background-color: var(--bg-elev2);
}

/* Hamburger button */
.topbar-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px 7px;
}

.topbar-hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-dim);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease),
              opacity var(--dur) var(--ease);
}

/* Mobile nav drawer */
.topbar-mobile-nav {
  display: none;
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  background-color: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  padding: 1rem;
  z-index: 99;
  flex-direction: column;
  gap: 0.25rem;
}

.topbar-mobile-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-dim);
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}
.topbar-mobile-nav a:hover {
  color: var(--text);
  background-color: var(--bg-elev2);
  text-decoration: none;
}

/* ── Responsive: ≤768px hamburger ────────────────────────── */
@media (max-width: 768px) {
  .topbar-nav { display: none; }
  .topbar-hamburger { display: flex; }

  .topbar.open .topbar-mobile-nav {
    display: flex;
  }

  /* Hamburger → X animation */
  .topbar.open .topbar-hamburger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .topbar.open .topbar-hamburger span:nth-child(2) {
    opacity: 0;
  }
  .topbar.open .topbar-hamburger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* ── Main content offset for fixed topbar ────────────────── */
main {
  padding-top: var(--topbar-h);
}

/* ── CTA Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  transition: transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
  text-decoration: none;
}

.btn:hover { text-decoration: none; }

.btn-primary {
  background-color: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background-color: #2563EB;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text);
  border: 1px solid var(--border-hi);
}
.btn-ghost:hover {
  background-color: var(--bg-elev2);
  border-color: var(--text-dim);
  transform: translateY(-2px);
}

/* ── Hero Section ─────────────────────────────────────────── */
#hero {
  min-height: calc(100svh - var(--topbar-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: clamp(4rem, 10vw, 7rem);
  position: relative;
  overflow: hidden;
}

/* Subtle grid background pattern — signature detail */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

/* Terminal-style prompt prefix before tagline */
.hero-prompt {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
}

.hero-line {
  display: inline-block;
  background-image:
    linear-gradient(110deg, transparent 45%, var(--accent-glow) 50%, transparent 55%),
    linear-gradient(180deg, var(--text) 25%, var(--hero-fade) 100%);
  background-size: 300% 100%, 100% 100%;
  background-position: 150% 0, 0 0;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: hero-shimmer 8s ease-in-out infinite;
}

/* Slow shimmer sweep across the name — endpoints keep the band off-canvas */
@keyframes hero-shimmer {
  0%, 55%    { background-position: 150% 0, 0 0; }
  85%, 100%  { background-position: -150% 0, 0 0; }
}

.hero-name {
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.02;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.25rem;
  letter-spacing: 0.01em;
}

/* Sub-line under the killer statement — smaller, dim */
.hero-positioning {
  font-family: var(--font-sans);
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  font-weight: 400;
  color: var(--text-dim);
  max-width: 52ch;
  line-height: 1.6;
  margin-top: 1.25rem;
  margin-bottom: 1.75rem;
}




.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.hero-stat {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-hi);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

/* Chips are labels, not buttons — a quiet border shift on hover, no lift,
   so they never read as clickable (they aren't). */
.hero-stat:hover {
  border-color: var(--accent-40);
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ── Case Study Layout (#work, #how) ─────────────────────── */
.case {
  border-top: 1px solid var(--border);
  padding-block: clamp(3rem, 6vw, 4.5rem);
}

.case-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.case-title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.9rem);
  margin-bottom: 2rem;
  max-width: 26ch;
}

.case-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}

@media (max-width: 860px) {
  .case-grid {
    grid-template-columns: 1fr;
  }
}

.case-beat {
  border-left: 2px solid var(--border-hi);
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
}

.case-beat h4 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 0.35rem;
}

.case-beat-outcome {
  border-left-color: var(--accent);
}



.case-diagram {
  min-height: 280px;
  position: sticky;
  top: calc(var(--topbar-h) + 2rem);
  --dg-node: var(--bg-elev2);
  --dg-stroke: var(--border-hi);
  --dg-flow: var(--accent);
  --dg-fail: #EF4444;
  --dg-ok: #22C55E;
  --dg-text: var(--text-dim);
}

.case-diagram svg {
  width: 100%;
  height: auto;
}

/* ── Principles Grid (#how) ───────────────────────────────── */
.principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (max-width: 700px) {
  .principles {
    grid-template-columns: 1fr;
  }
}

.principle {
  background: var(--bg-elev);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.principle:hover {
  border-color: var(--accent-40);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-dim);
}

.principle-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
}

.principle h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0.5rem 0 0.5rem;
}

.principle p {
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* ── Demo Showcase (#tooling) — full-width alternating rows ── */
.demo-showcase {
  display: flex;
  flex-direction: column;
  gap: 5rem;
}

.demo-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.demo-row:nth-child(even) .demo-terminal {
  order: 2;
}

@media (max-width: 900px) {
  .demo-row {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .demo-row:nth-child(even) .demo-terminal {
    order: 0;
  }
}

/* Terminal-window card — the visual anchor of each demo row */
.demo-terminal {
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-md);
  background: var(--bg-elev);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.demo-terminal:hover {
  border-color: var(--accent-40);
  transform: translateY(-2px);
  box-shadow: 0 16px 48px var(--accent-dim);
}

:root[data-theme="light"] .demo-terminal {
  box-shadow: 0 12px 32px rgba(15, 15, 26, 0.08);
}

.demo-terminal-bar {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.9rem;
  background: var(--bg-elev2);
  border-bottom: 1px solid var(--border);
}

.term-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.term-dot-r { background: #FF5F57; }
.term-dot-y { background: #FEBC2E; }
.term-dot-g { background: #28C840; }

.demo-terminal-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.demo-terminal-body {
  padding: 1.2rem 1.3rem 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 2;
}

.term-line {
  white-space: pre-wrap;
  color: var(--text-dim);
}

.term-cmd  { color: var(--text); }
.term-ok   { color: #22C55E; }
.term-gate { color: var(--accent); }
.term-note { color: var(--text-mute); font-style: italic; }

/* Blinking caret on the last line */
.demo-terminal-body .term-line:last-child::after {
  content: '';
  display: inline-block;
  width: 7px;
  height: 1.05em;
  margin-left: 7px;
  vertical-align: text-bottom;
  background: var(--accent);
  animation: caret-blink 1.1s steps(1) infinite;
}

@keyframes caret-blink {
  50% { opacity: 0; }
}

.demo-info {
  position: relative;
}

.demo-num {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.18;
  display: block;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.demo-info h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin: 0 0 0.75rem;
}

.demo-info p {
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.7;
}

.demo-stack {
  list-style: none;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  padding: 0;
  margin: 1rem 0 0;
}

.demo-stack li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-hi);
  padding: 0.2rem 0.6rem;
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.demo-stack li:hover {
  border-color: var(--accent-40);
  transform: translateY(-2px);
}

.demo-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

/* ── Experience Section ──────────────────────────────────── */
#experience {
  background: var(--bg);
}

.xp-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 1.5rem;
  border-top: 1px solid var(--border);
  padding-block: 2rem;
}

@media (max-width: 700px) {
  .xp-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
}

.xp-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.xp-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.xp-company {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.xp-ladder {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.xp-summary {
  color: var(--text-dim);
  max-width: 60ch;
}

.xp-summary + .xp-summary {
  margin-top: 0.75rem;
}

/* ── Skills Section (tiered) ─────────────────────────────── */
#skills {
  background: var(--bg);
}

.tier {
  border-top: 1px solid var(--border);
  padding-block: 1.75rem;
}

.tier h3 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  margin-bottom: 0.6rem;
}

.tier-list {
  color: var(--text-dim);
  line-height: 1.9;
}

/* ── Contact Section ──────────────────────────────────────── */
#contact {
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  text-align: center;
}

.contact-inner {
  max-width: 560px;
  margin-inline: auto;
}

.contact-tagline {
  font-size: 1.05rem;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
  line-height: 1.65;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* ── Footer ───────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding-block: 1.75rem;
  text-align: center;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-mute);
}

/* ── Focus visible for keyboard accessibility ─────────────── */
/* ── Section intro (How I Think) ─────────────────────────── */
.section-intro {
  font-size: 0.95rem;
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: 2rem;
  margin-top: -0.5rem;
}

/* ── Principle example (How I Think) ─────────────────────── */
.principle-example {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.5rem;
  padding-left: 1rem;
  border-left: 2px solid var(--border-hi);
}

.principle-example em {
  color: var(--text-dim);
}

/* ── Disabled button placeholder ──────────────────────────── */


/* ── Contact location line ────────────────────────────────── */
.contact-location {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-mute);
  margin-top: 1.5rem;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ── Reduced motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ── Enrichment pass 2026-07-13: case chips · case diagrams ── */

.case-chips {
  margin: -0.75rem 0 2rem;
}

.case-diagram .dg-node rect {
  fill: var(--dg-node);
  stroke: var(--dg-stroke);
  stroke-width: 1;
  rx: 6px;
}
.case-diagram .dg-node text,
.case-diagram .dg-label {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--dg-text);
}
.case-diagram .dg-label { font-size: 11px; opacity: 0.65; }
.case-diagram .dg-node-accent rect {
  stroke: var(--dg-flow);
  fill: var(--accent-dim);
  filter: drop-shadow(0 0 6px var(--accent-glow));
}
.case-diagram .dg-node-accent text { fill: var(--accent); }
.case-diagram .dg-node-ok rect { stroke: var(--dg-ok); }
.case-diagram .dg-node-ok text { fill: var(--dg-ok); }
.case-diagram .dg-node-fail rect { stroke: var(--dg-fail); opacity: 0.75; }
.case-diagram .dg-node-fail text { fill: var(--dg-fail); opacity: 0.85; }
.case-diagram .dg-fail-mark {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--dg-fail);
  opacity: 0.8;
}
.case-diagram .dg-wire {
  stroke: var(--dg-stroke);
  stroke-width: 1;
  fill: none;
}
.case-diagram .dg-wire-loop { stroke-dasharray: 4 4; stroke: var(--dg-flow); opacity: 0.7; }
.case-diagram .dg-node-sm rect { fill: var(--bg-elev); }
.case-diagram .dg-node-sm text { font-size: 11px; }

@media (max-width: 860px) {
  .case-diagram { position: static; min-height: 0; margin-top: 1rem; }
}

/* ── Content-architecture rebuild: about · numbers · case
      summaries/details · more work · field notes · xp tags ── */

/* About */
.about-body {
  max-width: 65ch;
}
.about-body p {
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
}
.about-body p:last-child { margin-bottom: 0; }

/* Numbers grid */
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.num-cell {
  background: var(--bg-elev);
  padding: 1.75rem 1.5rem;
}
.num-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 500;
  line-height: 1.1;
  color: var(--text);
}
.num-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.4rem;
}
/* Plain-language line under each number — the "what this means" layer */
.num-plain {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 0.3rem;
}
@media (max-width: 900px) {
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
}

/* One-line plain-language hook on case cards and detail pages */
.case-hook {
  font-family: var(--font-display);
  font-style: normal;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.5;
  color: var(--text);
  max-width: 52ch;
  margin-bottom: 1.5rem;
  font-weight: 500;
}

/* Case summary + expandable full case study */
.case-summary {
  color: var(--text-dim);
  max-width: 62ch;
  margin-bottom: 1.25rem;
}
/* More work list */
.more-work {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
}
.more-work-heading {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  margin-bottom: 1rem;
}
.more-work-list li {
  color: var(--text-dim);
  font-size: 0.95rem;
  max-width: 70ch;
  padding: 0.45rem 0 0.45rem 1.25rem;
  border-left: 2px solid var(--border-hi);
  margin-bottom: 0.5rem;
}

/* Field notes */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
@media (max-width: 900px) {
  .notes-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 700px) {
  .notes-grid { grid-template-columns: 1fr; }
}
.note-card {
  background: var(--bg-elev);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
/* War-story cards are content, not links — quiet border shift only, no lift. */
.note-card:hover {
  border-color: var(--accent-40);
}
.note-card h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 0.6rem;
}
.note-card p {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* Experience skill tags */
.xp-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.xp-tags li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border-hi);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}

/* ── Design-enhancement pass 2026-07-13: amber highlight system,
      scroll progress, details animation, diagram pulse ─────── */

/* Inline amber marker — impact phrases (subtle highlighter + underline) */
.hl {
  color: var(--text);
  padding: 0 0.18em;
  border-radius: 2px;
  background-image: linear-gradient(180deg, transparent 58%, var(--accent2-dim) 58%);
  box-shadow: inset 0 -2px 0 0 var(--accent2-40);
}

/* Numbers wall — amber numerals (impact) */
.num-value { color: var(--accent2); }

.num-cell {
  transition: background-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.num-cell:hover {
  background-color: var(--bg-elev2);
  box-shadow: inset 0 0 0 1px var(--accent2-40),
              0 8px 24px var(--accent2-dim);
}

/* The people cell — permanently emphasized */
.num-cell-hl {
  background: linear-gradient(135deg, var(--bg-elev) 40%, var(--accent2-dim) 100%);
  box-shadow: inset 0 0 0 1px var(--accent2-40);
}
.num-cell-hl .num-label { color: var(--accent2); }

/* How I Lead — amber family (people) */
#lead .principle-num { color: var(--accent2); }
#lead .principle h3 { color: var(--accent2); }
#lead .principle:hover {
  border-color: var(--accent2-40);
  box-shadow: 0 8px 32px var(--accent2-dim);
}

/* Scroll progress — 2px bar under the topbar, width driven by main.js */
.scroll-progress {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  z-index: 101;
  pointer-events: none;
}

/* <details> case study — animated open + rotating chevron */
@keyframes details-open {
  from { grid-template-rows: 0fr; opacity: 0; }
  to   { grid-template-rows: 1fr; opacity: 1; }
}

/* Case diagrams — gentle looping pulse on the accent node */
.case-diagram .dg-node-accent rect {
  animation: dg-pulse 3.2s ease-in-out infinite;
}
@keyframes dg-pulse {
  0%, 100% { filter: drop-shadow(0 0 4px var(--accent-glow)); opacity: 1; }
  50%      { filter: drop-shadow(0 0 12px var(--accent-40)); opacity: 0.9; }
}

/* ── Ambient-motion pass 2026-07-13: aurora blob B · diagram
      flow dots · terminal scanline sweep · chip shimmer ────── */

/* Aurora blob B — faint amber counter-drift inside the hero */
#hero::after {
  content: '';
  position: absolute;
  top: 8%;
  right: -18%;
  width: 55vw;
  height: 55vh;
  background: radial-gradient(ellipse at center, var(--glow2) 0%, transparent 70%);
  filter: blur(64px);
  pointer-events: none;
  will-change: transform;
  animation: aurora-drift-b 65s ease-in-out infinite alternate;
}

@keyframes aurora-drift-b {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(-7vw, 6vh, 0) scale(1.15); }
  100% { transform: translate3d(3vw, -4vh, 0) scale(0.9); }
}

/* Diagram flow dots — SMIL <animateMotion> along the wires;
   paused offscreen / under reduced motion by main.js */
.case-diagram .dg-dot {
  fill: var(--dg-flow);
  filter: drop-shadow(0 0 3px var(--accent-glow));
}
.case-diagram .dg-dot-2 {
  fill: var(--accent2);
  filter: drop-shadow(0 0 3px var(--accent2-glow));
}

/* Terminal cards — faint scanline/glow sweep across the body */
.demo-terminal-body {
  position: relative;
  overflow: hidden;
}
.demo-terminal-body::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 34%;
  background: linear-gradient(180deg, transparent, var(--accent), transparent);
  opacity: 0.04;
  pointer-events: none;
  transform: translateY(-110%);
  animation: term-sweep 20s linear infinite;
}
:root[data-theme="light"] .demo-terminal-body::after { opacity: 0.03; }

@keyframes term-sweep {
  0%       { transform: translateY(-110%); }
  55%, 100% { transform: translateY(320%); }
}

/* Reduced motion — hide the SMIL dots too (SMIL ignores the
   global animation kill-switch; JS also keeps SVGs paused) */
@media (prefers-reduced-motion: reduce) {
  .case-diagram .dg-dot { display: none; }
  body::before,
  #hero::after { animation: none; }
}

/* ── AI Engineering pass 2026-07-13: tech marquee (#skills) ── */

.tech-marquee {
  display: flex;
  overflow: hidden;
  gap: 2.5rem;
  margin-bottom: clamp(2rem, 5vw, 3rem);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}

.tech-marquee-track {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-shrink: 0;
  min-width: max-content;
  animation: marquee-scroll 45s linear infinite;
}

/* Pause the flow on hover */
.tech-marquee:hover .tech-marquee-track {
  animation-play-state: paused;
}

@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(calc(-100% - 2.5rem)); }
}

.tech-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.tech-item img {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Dark logos (e.g. Rust) — invert on the dark theme only */
.tech-item img.tech-icon-invert { filter: invert(1); }
:root[data-theme="light"] .tech-item img.tech-icon-invert { filter: none; }

/* Text-only badge for techs without a reliable devicon slug */
.tech-item-badge {
  border: 1px solid var(--border-hi);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  background: var(--bg-elev);
}
.tech-item-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
:root[data-theme="light"] .tech-item-badge { background: var(--bg-elev2); }

/* Reduced motion — static wrapped row, no duplicate track */
@media (prefers-reduced-motion: reduce) {
  .tech-marquee {
    -webkit-mask-image: none;
    mask-image: none;
  }
  .tech-marquee-track {
    animation: none;
    flex-wrap: wrap;
    min-width: 0;
  }
  .tech-marquee-track[aria-hidden="true"] { display: none; }
}

/* ── Multi-page pass 2026-07-13: nav active state · case links ·
      case pager · war stories · lab cards ─────────────────── */

/* Current-page marker in the topbar */
.topbar-nav a[aria-current="page"],
.topbar-mobile-nav a[aria-current="page"] {
  color: var(--accent);
}

/* Whole-card link — the entire case card navigates to its detail page.
   The card lift (further down) is now honest affordance: the card IS the link. */
.case-cardlink {
  display: block;
  color: inherit;
  text-decoration: none;
}
.case-cardlink:hover { text-decoration: none; }
.case-cardlink:focus-visible { outline-offset: 6px; }

/* "Read the case study →" cue on case cards (a span now — the card is the link) */
.case-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}
/* the cue underlines when the whole card is hovered, signalling the click target */
.case-cardlink:hover .case-link,
.case-mini-title a:hover { text-decoration: underline; }

/* Case beats column cap (detail pages without a diagram) */
.case-beats { max-width: 70ch; }

/* Prev / next case navigation */
.case-pager {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}
.case-pager a { color: var(--text-dim); }
.case-pager a:hover { color: var(--accent); text-decoration: none; }

/* War stories block on case detail pages */
.war-stories {
  border-top: 1px solid var(--border);
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 2.5rem;
}
.war-stories .notes-grid { margin-top: 1.5rem; }

/* Personal Lab article cards */
.lab-card {
  border-top: 1px solid var(--border);
  padding-block: clamp(2rem, 5vw, 3rem);
}
.lab-card-title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.2vw, 1.6rem);
  margin-bottom: 1.25rem;
}
/* Thesis block — long-form emphasized closer (normal body face, not serif-italic) */
.thesis-block {
  margin-top: 2.5rem;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--accent2, #F59E0B);
  background: var(--bg-elev);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text);
  max-width: 72ch;
}
.thesis-block strong { color: var(--accent2, #F59E0B); font-weight: 600; }

/* ── IA / visual-rhythm pass 2026-07-14: scene bands · hero stat
      sublines · numbers band · statement rows · compact principles ·
      about reference lines · quiet marquee · mini case rows ────── */

/* Scene bands — every second section gets a distinct backdrop */
.section-band {
  background: var(--bg-elev);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.band-amber {
  background:
    radial-gradient(50rem 26rem at 50% 15%, var(--glow2) 0%, transparent 70%),
    var(--bg-elev);
}
.section-wash {
  background: radial-gradient(60rem 32rem at 12% 0%, var(--glow) 0%, transparent 65%);
}

/* Hero stat chips with plain-language sublines */
.hero-stats-detailed {
  gap: 1.1rem 1.75rem;
  align-items: flex-start;
}
.hero-stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.hero-stat-sub {
  font-size: 0.72rem;
  color: var(--text-dim);
  padding-left: 0.85rem;
  max-width: 26ch;
  line-height: 1.5;
}

/* Numbers band — three oversized amber numerals, one quiet facts row */
.numbers-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(2rem, 6vw, 4.5rem);
  padding-block: clamp(0.5rem, 2vw, 1.5rem);
}
.numbers-band .num-value {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(3.25rem, 9vw, 6.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}
.band-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text);
  margin-top: 0.85rem;
}
.band-facts {
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
  line-height: 2;
  max-width: 80ch;
}
@media (max-width: 700px) {
  .numbers-band { grid-template-columns: 1fr; gap: 2.25rem; }
}

/* Statement rows — borderless full-width principles, oversized type */
.statements {
  margin-bottom: clamp(3rem, 7vw, 4.5rem);
}
.statement {
  border-top: 1px solid var(--border);
  padding-block: clamp(2rem, 5vw, 3.25rem);
}
.statement-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.statement h3 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0.6rem 0 0.9rem;
  max-width: 24ch;
}
.statement p {
  color: var(--text-dim);
  font-size: 1rem;
  max-width: 62ch;
}

/* Compact principles — quiet 2-column list, thin dividers, no boxes */
.principles-compact {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 clamp(2rem, 4vw, 3.5rem);
  border-top: 1px solid var(--border);
}
.principle-line {
  border-bottom: 1px solid var(--border);
  padding-block: 1.1rem;
}
.principle-line h4 {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.25rem;
}
.principle-line p {
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1.6;
}
@media (max-width: 700px) {
  .principles-compact { grid-template-columns: 1fr; }
}

/* About — one-line experience / core-stack reference rows */
.about-lines {
  margin-top: 2.5rem;
  border-top: 1px solid var(--border);
  max-width: 72ch;
}
.about-line {
  display: flex;
  gap: 1.25rem;
  align-items: baseline;
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text-dim);
}
.about-line-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  flex-shrink: 0;
  min-width: 9ch;
}
@media (max-width: 600px) {
  .about-line { flex-direction: column; gap: 0.25rem; }
}

/* Quiet marquee variant — smaller, slower, dimmer band at About's end */
.tech-marquee-quiet {
  margin-top: 3rem;
  margin-bottom: 0;
  opacity: 0.55;
}
.tech-marquee-quiet .tech-marquee-track { animation-duration: 75s; }
.tech-marquee-quiet .tech-item { font-size: 0.72rem; }
.tech-marquee-quiet .tech-item img { width: 16px; height: 16px; }
.tech-marquee-quiet .tech-item-badge { padding: 0.2rem 0.6rem; }

/* Mini case rows (work.html) — quiet compact entries, no boxes */
.case-minis {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}
.case-mini {
  padding-block: 1.5rem;
}
.case-mini + .case-mini {
  border-top: 1px solid var(--border);
}
.case-mini-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}
.case-mini-title a { color: var(--text); }
.case-mini-title a:hover { color: var(--accent); text-decoration: none; }
.case-mini-hook {
  color: var(--text-dim);
  font-size: 0.92rem;
  max-width: 60ch;
  margin-bottom: 0.4rem;
}

/* More-work strip — trailing "all systems" link */
.more-work-all {
  margin-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ── Hero-impact pass 2026-07-14: two-column hero · killer statement ·
      living money-path diagram · scroll cue ───────────────────────── */

/* Two-column hero: text left, living diagram right */
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}

/* Killer statement — serif setup line + big display payoff line */
.hero-statement {
  margin-top: 0.25rem;
}
.hero-statement-l1 {
  display: block;
  font-family: var(--font-display);
  font-style: normal;
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  line-height: 1.4;
  color: var(--text-dim);
}
.hero-statement-l2 {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.6vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--text);
  margin-top: 0.35rem;
  max-width: 18ch;
}
/* The ONE amber word in the hero text */
.hero-amber {
  font-family: 'Instrument Serif', Georgia, serif;
  font-style: italic;
  font-weight: 400;
  color: var(--accent2);
}

/* Hero diagram — reuses the dg-* system; not sticky, amber gate focal */
.hero-diagram {
  position: static;
  min-height: 0;
}
.hero-diagram .dg-node-amber rect {
  stroke: var(--accent2);
  fill: var(--accent2-dim);
  animation: dg-pulse-amber 3.2s ease-in-out infinite;
}
.hero-diagram .dg-node-amber text { fill: var(--accent2); }

@keyframes dg-pulse-amber {
  0%, 100% { filter: drop-shadow(0 0 4px var(--accent2-glow)); opacity: 1; }
  50%      { filter: drop-shadow(0 0 12px var(--accent2-40)); opacity: 0.9; }
}

/* Scroll cue — gentle chevron bounce at the hero's bottom edge */
.hero-scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 1.25rem;
  transform: translate(-50%, 0);
  color: var(--text-dim);
  font-size: 1.4rem;
  line-height: 1;
  pointer-events: none;
  user-select: none;
  z-index: 1;
  animation: cue-bounce 2s ease-in-out infinite;
}

@keyframes cue-bounce {
  0%, 100% { transform: translate(-50%, 0);   opacity: 0.5; }
  50%      { transform: translate(-50%, 7px); opacity: 0.9; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-scroll-cue { animation: none; transform: translate(-50%, 0); opacity: 0.5; }
}

/* Mobile ≤860px: stack — diagram below text, height capped */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.25rem; }
  .hero-visual { max-width: 420px; }
  .hero-diagram svg { max-height: 340px; }
}

/* Masked line/word reveals — wrappers are injected by animations.js only
   when animating (motion OK + GSAP present), so static / reduced-motion /
   no-CDN pages keep the original DOM. Metrics-neutral: the padding that
   gives descenders room is cancelled by an equal negative margin. */
@media (prefers-reduced-motion: reduce) {
  }

/* Featured cards / lab cards — hover lift with a 2px counter-parallax
   on the inner diagram; desktop pointers, motion-OK only */
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .case,
  .lab-card {
    transition: transform 320ms var(--ease);
  }
  .case:hover,
  .lab-card:hover { transform: translateY(-3px); }

  .case .case-diagram,
  .lab-card .case-diagram {
    transition: transform 320ms var(--ease);
  }
  .case:hover .case-diagram,
  .lab-card:hover .case-diagram { transform: translateY(2px); }
}

/* ── Content pass 2026-07-15: record river · roads not taken ── */

/* River overview (work index) — full-width dg-* diagram, not sticky */
.river-block { margin-bottom: clamp(3rem, 7vw, 4.5rem); }
.river-block .section-heading {
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
  margin-bottom: 0.75rem;
}
.river-diagram {
  position: static;
  min-height: 0;
  margin-bottom: 0.5rem;
}
.river-diagram .dg-node-amber rect {
  stroke: var(--accent2);
  fill: var(--accent2-dim);
  animation: dg-pulse-amber 3.2s ease-in-out infinite;
}
.river-diagram .dg-node-amber text { fill: var(--accent2); }

/* Roads not taken — <details> rows */
.roads-list { max-width: 72ch; }
.road {
  border-top: 1px solid var(--border);
  padding: 0.9rem 0;
}
.road:last-child { border-bottom: 1px solid var(--border); }
.road summary {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  transition: color var(--dur) var(--ease);
}
.road summary::-webkit-details-marker { display: none; }
.road summary::before {
  content: '+';
  color: var(--accent);
  flex: none;
}
.road[open] summary::before { content: '−'; }
.road summary:hover { color: var(--accent); }
.road .road-body { display: grid; grid-template-rows: 1fr; }
.road[open] .road-body { animation: details-open 0.35s var(--ease); }
.road .road-body p {
  overflow: hidden;
  min-height: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.7;
  padding: 0.6rem 0 0.25rem 1.35rem;
  max-width: 68ch;
}

/* ── Proof pass 2026-07-19: code snippets on case pages ·
      proof strip (live demos as evidence) ──────────────────── */

/* "The design, in code" — representative snippets, terminal-card framed */
.proof-code {
  border-top: 1px solid var(--border);
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 2.5rem;
}
.proof-code-note {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-style: italic;
  margin-bottom: 1.25rem;
  max-width: 62ch;
}
.code-proof { max-width: 780px; }
.code-proof + .code-proof { margin-top: 1.25rem; }
.code-proof-body {
  margin: 0;
  padding: 1.15rem 1.3rem 1.3rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--text);
  overflow-x: auto;
  tab-size: 2;
}
.code-proof-body code { font-family: inherit; }

/* Hand-rolled token colors — no highlight library */
.tk-cm   { color: var(--text-mute); font-style: italic; }
.tk-kw   { color: #C084FC; }
.tk-fn   { color: #7AA2F7; }
.tk-type { color: #2DD4BF; }
.tk-str  { color: #34D399; }
.tk-num  { color: var(--accent2); }

:root[data-theme="light"] .tk-cm   { color: #8888A0; }
:root[data-theme="light"] .tk-kw   { color: #9333EA; }
:root[data-theme="light"] .tk-fn   { color: #2563EB; }
:root[data-theme="light"] .tk-type { color: #0D9488; }
:root[data-theme="light"] .tk-str  { color: #059669; }

/* Proof strip (index · systems) — live interactive demos as evidence.
   Amber family: this is impact, not plumbing. */
.proof-strip {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
}
.proof-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
@media (max-width: 860px) {
  .proof-cards { grid-template-columns: 1fr; }
}
.proof-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  color: inherit;
  transition: border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.proof-card:hover {
  text-decoration: none;
  border-color: var(--accent2-40);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent2-dim);
}
.proof-card-kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent2);
  margin-bottom: 0.5rem;
}
.proof-card h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}
.proof-card p {
  color: var(--text-dim);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}
.proof-card-cta {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}

/* Hermes Q&A — problem/solution entries. Left accent rule, quiet card. */
.qna-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.qna-item {
  background: var(--bg-elev);
  border: 1px solid var(--border-hi);
  border-left: 2px solid var(--accent-40);
  border-radius: var(--radius-md);
  padding: 1.6rem 1.75rem;
  transition: border-color var(--dur) var(--ease);
}
.qna-item:hover {
  border-color: var(--accent-40);
}
.qna-item h3 {
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 0.9rem;
}
.qna-item p {
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.7;
}
.qna-item p + p {
  margin-top: 0.75rem;
}
.qna-item .more-work-list {
  margin-top: 0.75rem;
}
.qna-item .code-proof {
  margin-top: 1.15rem;
}

/* ── Architecture diagram (raster image) ────────────────────── */
.arch-diagram {
  margin: 2rem auto;
  max-width: 960px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-hi);
  background: #0d1117;
}
.arch-diagram img {
  width: 100%;
  height: auto;
  display: block;
}