/* ============================================
   Design tokens — Monochrome / Concept
   ============================================ */
:root {
  /* Light theme (default) */
  --bg: #ffffff;
  --bg-soft: #f6f6f7;
  --surface: #ffffff;
  --surface-2: #f2f2f4;
  --text: #16161a;
  --text-soft: #52525b;
  --text-faint: #8f8f98;
  --accent: #1d4fd8;
  --ring: rgba(29, 79, 216, 0.35);
  --hairline: rgba(22, 22, 26, 0.1);
  --shadow: 0 1px 2px rgba(22, 22, 26, 0.05), 0 10px 28px rgba(22, 22, 26, 0.06);
  --shadow-lg: 0 2px 6px rgba(22, 22, 26, 0.07), 0 28px 56px rgba(22, 22, 26, 0.11);
  --grid-line: rgba(22, 22, 26, 0.05);

  --display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;

  --content-width: 1100px;
  --radius: 12px;
  --radius-sm: 8px;
}

[data-theme="dark"] {
  --bg: #0c0c0f;
  --bg-soft: #141417;
  --surface: #16161a;
  --surface-2: #1d1d22;
  --text: #ececf1;
  --text-soft: #a1a1aa;
  --text-faint: #6f6f78;
  --accent: #6b93f2;
  --ring: rgba(107, 147, 242, 0.4);
  --hairline: rgba(236, 236, 241, 0.1);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 28px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, 0.55), 0 28px 56px rgba(0, 0, 0, 0.55);
  --grid-line: rgba(236, 236, 241, 0.04);
}

/* Theme pre-hydration */
html {
  color-scheme: light;
}
html[data-theme="dark"] {
  color-scheme: dark;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ============================================
   Base
   ============================================ */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background 0.35s ease, color 0.35s ease;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

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

::selection { background: var(--accent); color: #fff; }

.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 32px;
}

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.12;
  margin: 0;
  color: var(--text);
  letter-spacing: -0.02em;
}

p { max-width: 64ch; color: var(--text-soft); }

.hairline {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 0;
}

/* ============================================
   Header
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hairline);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.site-header .name {
  font-family: var(--display);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.site-header nav {
  display: flex;
  gap: 16px;
  align-items: center;
}

.site-header nav .nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
}

.site-header nav a:not(.back-link) {
  color: var(--text-soft);
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}

.site-header nav a:not(.back-link)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  transition: width 0.25s ease;
}

.site-header nav a:not(.back-link):hover::after,
.site-header nav a.active::after {
  width: 100%;
}

.site-header nav a:hover,
.site-header nav a.active { color: var(--text); }

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  color: var(--text-soft);
  font-family: var(--sans);
  font-size: 0.85rem;
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--text);
}

.theme-toggle .icon { display: inline-flex; }

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: inline-flex; }

[data-theme="dark"] .theme-toggle .icon-sun { display: inline-flex; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  padding: 120px 0 96px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
}

.hero .wrap { position: relative; }

.hero-inner {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 56px;
  align-items: start;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 50%, transparent);
  animation: pulse 2.4s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 50%, transparent); }
  70% { box-shadow: 0 0 0 8px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.9rem);
  max-width: 14ch;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.hero h1 em { font-style: normal; color: var(--accent); }

.hero p.lede {
  margin-top: 24px;
  font-size: 1.12rem;
  color: var(--text-soft);
  max-width: 46ch;
}

.hero .cta-row {
  margin-top: 36px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--sans);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s, background 0.18s;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 30%, transparent);
}

.btn-primary:hover {
  background: color-mix(in srgb, var(--accent) 88%, #000);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 38%, transparent);
}

.btn-ghost {
  border-color: var(--hairline);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Hero graphic card */
.hero-panel {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.hero-panel .panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-faint);
}

.hero-panel .panel-head .led {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

.panel-stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 22px;
}

.panel-stat .num {
  font-family: var(--display);
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
}

.panel-stat .delta { font-family: var(--mono); font-size: 0.8rem; color: var(--accent); }

.mini-bars {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  height: 90px;
}

.mini-bars span {
  flex: 1;
  border-radius: 3px 3px 0 0;
  background: var(--accent);
  opacity: 0.5;
  animation: grow 1.1s ease both;
  transform-origin: bottom;
}

.mini-bars span:nth-child(3n) { opacity: 0.78; }
.mini-bars span:nth-child(6n) { opacity: 1; }

@keyframes grow { from { transform: scaleY(0); } to { transform: scaleY(1); } }

.mini-bars span:nth-child(1) { height: 32%; animation-delay: 0.1s; }
.mini-bars span:nth-child(2) { height: 52%; animation-delay: 0.2s; }
.mini-bars span:nth-child(3) { height: 40%; animation-delay: 0.3s; }
.mini-bars span:nth-child(4) { height: 68%; animation-delay: 0.4s; }
.mini-bars span:nth-child(5) { height: 58%; animation-delay: 0.5s; }
.mini-bars span:nth-child(6) { height: 82%; animation-delay: 0.6s; }
.mini-bars span:nth-child(7) { height: 74%; animation-delay: 0.7s; }
.mini-bars span:nth-child(8) { height: 96%; animation-delay: 0.8s; }
.mini-bars span:nth-child(9) { height: 88%; animation-delay: 0.9s; }

.hero-panel .panel-foot {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
}

.hero-panel .panel-foot .accent { color: var(--accent); }

/* ============================================
   Scroll cue
   ============================================ */
.scroll-cue {
  margin-top: 72px;
  display: flex;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.scroll-cue .arrow {
  display: inline-block;
  margin-left: 6px;
  animation: bob 1.8s ease-in-out infinite;
  color: var(--accent);
}

@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(4px); } }

/* ============================================
   Section scaffolding
   ============================================ */
section { padding: 88px 0; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 48px;
  gap: 24px;
}

.section-head .eyebrow {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.9rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.section-head .index {
  font-family: var(--mono);
  color: var(--text-faint);
  font-size: 0.85rem;
  white-space: nowrap;
}

/* ============================================
   About
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: start;
}

.about-grid .body p { font-size: 1.06rem; margin: 0 0 18px; }

.about-grid .body p strong {
  color: var(--accent);
  font-weight: 600;
}

.fact-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px 24px;
}

.fact-card li {
  list-style: none;
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.95rem;
}

.fact-card li:last-child { border-bottom: none; }

.fact-card .k { color: var(--text-soft); flex-shrink: 0; }

.fact-card .v { color: var(--text); font-weight: 500; text-align: right; }

/* ============================================
   Skills
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.skill-group {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s;
}

.skill-group:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.skill-group h3 {
  font-size: 0.9rem;
  font-family: var(--mono);
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.skill-group ul { list-style: none; margin: 0; padding: 0; }

.skill-group li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.93rem;
  color: var(--text);
  padding: 6px 0;
}

.skill-group li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ============================================
   Projects
   ============================================ */
.project-row {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  padding: 44px 0;
  border-top: 1px solid var(--hairline);
  align-items: center;
}

.project-row:last-child { border-bottom: 1px solid var(--hairline); }

.project-media {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  aspect-ratio: 16 / 10;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow);
}

.project-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  display: block;
}

.project-media .placeholder {
  font-family: var(--mono);
  color: var(--text-faint);
  font-size: 0.8rem;
  text-align: center;
  padding: 24px;
  line-height: 1.8;
}

.project-meta .status {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.02em;
}

.project-meta .status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.project-meta h3 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.project-meta p { margin: 0 0 20px; font-size: 1rem; }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-soft);
  border: 1px solid var(--hairline);
  background: var(--surface);
  padding: 5px 11px;
  border-radius: 999px;
  transition: border-color 0.2s, color 0.2s;
}

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

.project-links a {
  font-size: 0.92rem;
  color: var(--accent);
  font-weight: 600;
  margin-right: 20px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.project-links a:hover { color: var(--text); }

.project-links a .arrow-expand { transition: transform 0.2s; }
.project-links a:hover .arrow-expand { transform: translateX(3px); }

/* ============================================
   Services
   ============================================ */
.services-lede {
  font-size: 1.1rem;
  color: var(--text-soft);
  margin: -24px 0 44px;
  max-width: 60ch;
}

.services-lede span { color: var(--text-faint); font-size: 0.95rem; }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.service-card .service-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 20px;
}

.service-card h3 { font-size: 1.15rem; margin-bottom: 10px; }

.service-card > p { font-size: 0.94rem; margin: 0 0 18px; }

.service-card ul { list-style: none; margin: 0; padding: 0; flex: 1; }

.service-card li {
  display: flex;
  align-items: baseline;
  gap: 9px;
  font-size: 0.9rem;
  color: var(--text);
  padding: 5px 0;
}

.service-card li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

.service-card > a {
  margin-top: 22px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-card > a:hover { color: var(--text); }

.service-card > a .arrow-expand { transition: transform 0.2s; }
.service-card > a:hover .arrow-expand { transform: translateX(3px); }

.services-cta {
  margin-top: 48px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.services-cta h3 { font-size: 1.7rem; margin-bottom: 10px; }

.services-cta p { margin: 0 0 26px; font-size: 1.02rem; }

.services-cta .btn .arrow-expand { transition: transform 0.2s; }
.services-cta .btn:hover .arrow-expand { transform: translateX(3px); }

/* ============================================
   Client work
   ============================================ */
.client-work {
  margin-top: 48px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 44px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.client-work-head h3 { font-size: 1.45rem; margin-bottom: 10px; }

.client-work-head p { margin: 0; font-size: 1rem; }

.client-work-item {
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 24px 26px;
  background: var(--bg-soft);
}

.client-work-item .client-status {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.02em;
}

.client-work-item .client-status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.client-work-item h4 {
  font-size: 1.25rem;
  font-family: var(--display);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.client-work-item p { font-size: 0.95rem; margin: 0 0 18px; }

.client-work-item > a {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.client-work-item > a:hover { color: var(--text); }

.client-work-item > a .arrow-expand { transition: transform 0.2s; }
.client-work-item > a:hover .arrow-expand { transform: translateX(3px); }

/* ============================================
   Experience
   ============================================ */
.exp-list {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px 32px;
}

.exp-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  padding: 26px 0;
  border-bottom: 1px solid var(--hairline);
}

.exp-item:last-child { border-bottom: none; }

.exp-item .when {
  font-family: var(--mono);
  color: var(--text-faint);
  font-size: 0.8rem;
  padding-top: 3px;
}

.exp-item h3 {
  font-size: 1.12rem;
  font-family: var(--sans);
  margin-bottom: 6px;
}

.exp-item .org {
  color: var(--accent);
  font-size: 0.88rem;
  margin-bottom: 8px;
  display: block;
  font-weight: 500;
}

.exp-item p { font-size: 0.95rem; margin: 0; }

/* ============================================
   Contact / CTA
   ============================================ */
.contact {
  text-align: left;
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--hairline);
  padding: 104px 0;
}

.contact .wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.contact .section-head h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  max-width: 14ch;
}

.contact .sub {
  margin-top: 18px;
  font-size: 1.05rem;
  max-width: 44ch;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-links a {
  font-size: 1rem;
  color: var(--text-soft);
  padding: 12px 0;
  border-bottom: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s, padding-left 0.2s;
}

.contact-links a:hover { color: var(--accent); padding-left: 8px; }

.contact-links a .ext { font-family: var(--mono); font-size: 0.8rem; color: var(--text-faint); }

/* ============================================
   Footer
   ============================================ */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 32px 0;
  font-size: 0.82rem;
  color: var(--text-faint);
  background: var(--bg-soft);
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer a { color: var(--text-soft); }
.site-footer a:hover { color: var(--accent); }

/* ============================================
   Project detail pages
   ============================================ */
.detail-hero {
  padding: 84px 0 56px;
  border-bottom: 1px solid var(--hairline);
}

.detail-hero .status {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}

.detail-hero .status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.detail-hero h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  margin: 0 0 20px;
  max-width: 18ch;
  letter-spacing: -0.02em;
}

.detail-hero .lede { font-size: 1.15rem; max-width: 56ch; }

.detail-hero .tag-list { margin-top: 28px; margin-bottom: 28px; }

.detail-body { padding: 56px 0 88px; }

.detail-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 64px;
}

.detail-nav {
  position: sticky;
  top: 96px;
  align-self: start;
}

.detail-nav .label {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-faint);
  margin-bottom: 16px;
}

.detail-nav a {
  display: block;
  color: var(--text-soft);
  font-size: 0.9rem;
  padding: 8px 0;
  border-left: 2px solid transparent;
  padding-left: 12px;
  transition: color 0.2s, border-color 0.2s;
}

.detail-nav a:hover { color: var(--text); }

.detail-nav a.active {
  color: var(--accent);
  border-left-color: var(--accent);
}

.detail-section { padding: 0 0 48px; }

.detail-section h2 {
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.detail-section p { font-size: 1rem; }

.detail-section ul { color: var(--text-soft); padding-left: 4px; list-style: none; margin: 0; }

.detail-section ul li {
  padding: 10px 0 10px 22px;
  position: relative;
  margin: 0;
  border-bottom: 1px solid var(--hairline);
}

.detail-section ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 19px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.detail-section ul li:last-child { border-bottom: none; }

.back-link { color: var(--text-soft); font-size: 0.9rem; display: inline-flex; align-items: center; gap: 6px; }
.back-link:hover { color: var(--accent); }

.detail-hero .project-media { margin-top: 36px; }

.case-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.case-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
  transition: border-color 0.2s, transform 0.2s;
}

.case-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.case-card .case-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
  display: block;
}

.case-card h3 { font-size: 1.05rem; margin: 0 0 8px; }

.case-card p { font-size: 0.92rem; margin: 0 0 14px; }

.case-card a {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.case-card a:hover { color: var(--text); }

/* ============================================
   Reveal animation (progressive enhancement)
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-panel { max-width: 480px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .client-work { grid-template-columns: 1fr; gap: 28px; }
  .project-row { grid-template-columns: 1fr; gap: 28px; }
  .project-media { aspect-ratio: 16 / 9; }
  .exp-item { grid-template-columns: 1fr; gap: 8px; }
  .contact .wrap { grid-template-columns: 1fr; gap: 40px; }
  .detail-layout { grid-template-columns: 1fr; gap: 8px; }
  .detail-nav { position: static; display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 8px; }
  .detail-nav .label { width: 100%; margin-bottom: 0; }
  .detail-nav a { padding: 6px 10px; border-left: none; border-bottom: 2px solid transparent; }
  .detail-nav a.active { border-bottom-color: var(--accent); }
  .case-cards { grid-template-columns: 1fr; }
  .site-header nav .nav-links { display: none; }
}

@media (max-width: 560px) {
  .skills-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  section { padding: 64px 0; }
  .wrap { padding: 0 20px; }
  .exp-item { grid-template-columns: 1fr; }
}