/* =============================================================
   Jarvis Personal Site · Agentic refresh
   Based on /Users/dulipeng/.codex/skills/agentic/SKILL.md
   Intent: conversational AI-first interface, clear outcomes,
   minimal controls, and delegated task flows.
   ============================================================= */

:root {
  --primary: #FF5701;
  --primary-dark: #D94800;
  --primary-soft: #FFE2D1;
  --secondary: #F6F6F1;
  --surface: #FFFFFF;
  --surface-raised: #FBFBF8;
  --text: #111827;
  --text-soft: #4B5563;
  --text-muted: #6B7280;
  --line: #E5E7EB;
  --line-strong: #D1D5DB;
  --dark: #10131A;
  --dark-2: #171B24;
  --on-dark: #F9FAFB;
  --on-dark-soft: #D1D5DB;
  --success: #16A34A;
  --warning: #D97706;
  --danger: #DC2626;
  --blue: #2563EB;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Microsoft YaHei", sans-serif;
  --font-display: "Playfair Display", "Source Serif 4", Georgia, serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;

  --t-12: 0.75rem;
  --t-14: 0.875rem;
  --t-16: 1rem;
  --t-18: 1.125rem;
  --t-20: 1.25rem;
  --t-24: 1.5rem;
  --t-32: 2rem;
  --t-40: 2.5rem;
  --t-56: 3.5rem;
  --t-72: 4.5rem;

  --s-4: 4px;
  --s-8: 8px;
  --s-12: 12px;
  --s-16: 16px;
  --s-20: 20px;
  --s-24: 24px;
  --s-32: 32px;
  --s-40: 40px;
  --s-48: 48px;
  --s-64: 64px;
  --s-80: 80px;
  --s-96: 96px;
  --s-128: 128px;

  --r-4: 4px;
  --r-8: 8px;
  --maxw: 1180px;
  --shadow: 0 18px 48px rgba(17, 24, 39, 0.08);
  --shadow-soft: 0 8px 28px rgba(17, 24, 39, 0.06);
  --ease: cubic-bezier(.2, .7, .2, 1);
  --section-py: var(--s-80);
}

@media (min-width: 1024px) {
  :root { --section-py: var(--s-128); }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  min-width: 320px;
  overflow-x: hidden;
  font-family: var(--font-sans);
  font-size: var(--t-16);
  line-height: 1.65;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 87, 1, 0.10), transparent 32rem),
    linear-gradient(180deg, var(--secondary), #fff 34rem);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease), transform .18s var(--ease); }
button { font: inherit; border: 0; background: none; color: inherit; cursor: pointer; }
ul, ol { list-style: none; }
em { font-style: normal; font-weight: 700; color: var(--primary); }
strong { font-weight: 750; }
::selection { background: var(--primary); color: #fff; }

.container {
  width: min(100%, var(--maxw));
  margin: 0 auto;
  padding: 0 var(--s-24);
}
@media (max-width: 640px) {
  .container { padding: 0 var(--s-16); }
}

.serif,
.hero__title .serif,
.hero__title-accent {
  font-family: var(--font-display);
}

.display {
  font-size: clamp(var(--t-32), 4vw, var(--t-56));
  line-height: 1.06;
  letter-spacing: 0;
  font-weight: 760;
  color: var(--text);
}
.display--center { max-width: 840px; margin: 0 auto; text-align: center; }
.lead {
  font-size: var(--t-20);
  color: var(--text);
  line-height: 1.7;
}
.muted { color: var(--text-muted); }

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 246, 241, 0.84);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: background .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.88);
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-soft);
}
.nav__inner {
  width: min(100%, var(--maxw));
  margin: 0 auto;
  padding: var(--s-14, 14px) var(--s-24);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-24);
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  min-height: 44px;
  font-size: var(--t-20);
  font-weight: 800;
  letter-spacing: 0;
}
.nav__mark {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: var(--r-8);
  background: var(--primary);
  color: #fff;
  font-size: var(--t-16);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--s-8);
}
.nav__links a {
  display: inline-flex;
  align-items: center;
  gap: var(--s-6, 6px);
  min-height: 44px;
  padding: 0 var(--s-12);
  border-radius: var(--r-8);
  font-size: var(--t-14);
  font-weight: 650;
  color: var(--text-soft);
}
.nav__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--primary);
}
.nav__links a:hover,
.nav__links a.is-active {
  color: var(--text);
  background: rgba(255, 87, 1, 0.09);
}
.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--r-8);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line);
  background: var(--surface);
}
.nav__toggle span {
  width: 19px;
  height: 2px;
  border-radius: 99px;
  background: var(--text);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

@media (max-width: 860px) {
  .nav__inner { padding: var(--s-10, 10px) var(--s-16); }
  .nav__links {
    position: absolute;
    top: calc(100% + var(--s-8));
    left: var(--s-16);
    right: var(--s-16);
    display: grid;
    gap: var(--s-4);
    padding: var(--s-8);
    border: 1px solid var(--line);
    border-radius: var(--r-8);
    background: var(--surface);
    box-shadow: var(--shadow);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
  }
  .nav.is-open .nav__links { opacity: 1; transform: none; pointer-events: auto; }
  .nav__links a { width: 100%; justify-content: flex-start; padding: 0 var(--s-16); }
  .nav__toggle { display: flex; }
  .nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
  .nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* Buttons and labels */
.btn,
.bento-cell__link {
  min-height: 44px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-8);
  padding: 0 var(--s-20);
  border-radius: var(--r-8);
  border: 1px solid transparent;
  font-size: var(--t-16);
  font-weight: 760;
  white-space: nowrap;
}
.btn--primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 12px 28px rgba(255, 87, 1, 0.24);
}
.btn--primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn--primary span { transition: transform .18s var(--ease); }
.btn--primary:hover span { transform: translateX(3px); }
.btn--ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--line-strong);
}
.btn--ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  min-height: 28px;
  padding: 0 var(--s-10, 10px);
  border-radius: var(--r-8);
  font-family: var(--font-mono);
  font-size: var(--t-12);
  font-weight: 700;
  color: var(--success);
  background: rgba(22, 163, 74, 0.10);
}
.badge--live::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
}

/* Hero */
.hero {
  position: relative;
  padding: var(--s-80) 0 0;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  color: rgba(17, 24, 39, 0.08);
}
.hero__glow {
  position: absolute;
  width: 44rem;
  height: 44rem;
  top: -22rem;
  right: -12rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 87, 1, 0.18), transparent 62%);
}
.hero__grid-pattern {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: .35;
}
.hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s-40);
  padding-bottom: var(--s-64);
}
@media (min-width: 940px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1.1fr) 380px;
    align-items: center;
    gap: var(--s-64);
    min-height: 620px;
    padding-bottom: var(--s-80);
  }
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-10, 10px);
  max-width: 100%;
  padding: var(--s-8) var(--s-12);
  border: 1px solid var(--line);
  border-radius: var(--r-8);
  background: rgba(255, 255, 255, 0.76);
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--text-soft);
  box-shadow: var(--shadow-soft);
}
.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.12);
}
.eyebrow__sep { color: var(--line-strong); }
.hero__title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--s-4) var(--s-16);
  margin: var(--s-24) 0;
  font-size: clamp(3rem, 9vw, var(--t-72));
  line-height: .95;
  letter-spacing: 0;
  color: var(--text);
}
.hero__title .serif,
.hero__title .italic {
  font-weight: 800;
}
.hero__title-accent {
  color: var(--primary);
  font-style: italic;
  font-weight: 900;
}
.hero__title .italic {
  position: relative;
  color: var(--text);
}
.hero__title .italic::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .05em;
  height: .18em;
  border-radius: var(--r-4);
  background: var(--primary-soft);
  z-index: -1;
}
.hero__cursor {
  width: .08em;
  height: .72em;
  border-radius: 999px;
  background: var(--primary);
  animation: blink 1.05s steps(2, end) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero__lede {
  max-width: 680px;
  font-size: clamp(var(--t-18), 2vw, var(--t-24));
  color: var(--text-soft);
  line-height: 1.65;
}
.hero__manifest {
  max-width: 680px;
  margin-top: var(--s-16);
  padding: var(--s-16);
  border: 1px solid var(--line);
  border-left: 4px solid var(--primary);
  border-radius: var(--r-8);
  background: rgba(255, 255, 255, 0.72);
  color: var(--text-soft);
}
.hero__manifest em { color: var(--text); }
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-12);
  margin-top: var(--s-32);
}
.hero__signature { position: relative; }
.sig-card {
  position: relative;
  padding: var(--s-24);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--r-8);
  background:
    linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.72)),
    var(--surface);
  box-shadow: var(--shadow);
}
.sig-card::before {
  content: "delegation console";
  position: absolute;
  top: var(--s-16);
  right: var(--s-16);
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--primary);
}
.sig-card__head,
.sig-card__foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--s-16);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--s-16);
}
.sig-card__label,
.sig-card__scroll,
.sig-card__list dt {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0;
  color: var(--text-muted);
}
.sig-card__bullet {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
}
.sig-card__list {
  display: grid;
  gap: var(--s-8);
}
.sig-card__list > div {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: var(--s-12);
  align-items: baseline;
  padding: var(--s-12);
  border-radius: var(--r-8);
  background: var(--surface-raised);
  border: 1px solid var(--line);
}
.sig-card__list dd {
  min-width: 0;
  color: var(--text);
  font-weight: 700;
}
.sig-card__list a { color: var(--blue); }
.sig-card__list-big {
  background: var(--dark) !important;
  color: var(--on-dark);
}
.sig-card__list-big dt,
.sig-card__list-big .num-unit { color: var(--on-dark-soft); }
.sig-card__list-big dd {
  display: inline-flex;
  align-items: baseline;
  gap: var(--s-4);
  color: var(--on-dark);
}
.sig-card__list-big .num {
  font-family: var(--font-display);
  font-size: var(--t-40);
  color: var(--primary);
  line-height: 1;
}
.sig-card__foot {
  margin: var(--s-16) 0 0;
  padding: var(--s-16) 0 0;
  border-bottom: 0;
  border-top: 1px solid var(--line);
}
.marquee {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--dark);
  color: var(--on-dark);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__track {
  display: inline-flex;
  gap: var(--s-24);
  align-items: center;
  white-space: nowrap;
  padding: var(--s-14, 14px) 0;
  font-family: var(--font-mono);
  font-size: var(--t-14);
  color: var(--on-dark-soft);
  animation: marquee 54s linear infinite;
}
.marquee__sep { color: var(--primary); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* Sections */
.section { position: relative; padding: var(--section-py) 0; }
.section--dark,
.section--vision {
  background:
    radial-gradient(circle at top right, rgba(255, 87, 1, .14), transparent 34rem),
    var(--dark);
  color: var(--on-dark);
}
.chapter {
  display: flex;
  align-items: center;
  gap: var(--s-12);
  margin-bottom: var(--s-24);
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--text-muted);
}
.chapter__num {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-8);
  background: var(--primary);
  color: #fff;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  font-weight: 800;
}
.chapter__label {
  font-weight: 800;
  color: var(--text);
}
.chapter__line {
  flex: 1;
  height: 1px;
  background: var(--line);
}
.chapter--center {
  justify-content: center;
  text-align: center;
}
.chapter--center .chapter__line { max-width: 88px; }
.section--dark .chapter__label,
.section--vision .chapter__label,
.chapter--light .chapter__label { color: var(--on-dark); }
.section--dark .chapter__line,
.section--vision .chapter__line,
.chapter--light .chapter__line { background: rgba(255,255,255,.14); }
.section--dark .display,
.section--vision .display { color: var(--on-dark); }
.section__sub {
  max-width: 680px;
  margin: var(--s-20) auto var(--s-48);
  text-align: center;
  color: var(--on-dark-soft);
}

/* About */
.about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-32);
  margin-bottom: var(--s-48);
}
@media (min-width: 900px) {
  .about-layout {
    grid-template-columns: 1fr 1fr;
    grid-template-areas: "title quote" "body quote";
    gap: var(--s-48);
    align-items: start;
  }
  .about-layout__title { grid-area: title; }
  .about-layout__body { grid-area: body; }
  .pullquote { grid-area: quote; }
}
.about-layout__body {
  display: grid;
  gap: var(--s-16);
  max-width: 620px;
}
.about-layout__body p { color: var(--text-soft); }
.about-layout__body .lead {
  padding: var(--s-20);
  border-radius: var(--r-8);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}
.dropcap { display: none; }
.pullquote {
  min-height: 100%;
  padding: var(--s-32);
  border-radius: var(--r-8);
  background: var(--dark);
  color: var(--on-dark);
  box-shadow: var(--shadow);
}
.pullquote__mark {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-8);
  background: var(--primary);
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--t-40);
  line-height: 1;
}
.pullquote p {
  margin-top: var(--s-24);
  font-size: clamp(var(--t-24), 3vw, var(--t-40));
  line-height: 1.18;
  font-weight: 800;
}
.pullquote p strong { color: var(--primary); }
.pullquote__attr {
  display: block;
  margin-top: var(--s-24);
  color: var(--on-dark-soft);
  font-family: var(--font-mono);
  font-size: var(--t-12);
}
.principles-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-12);
}
@media (min-width: 760px) {
  .principles-bar { grid-template-columns: repeat(3, 1fr); }
}
.principle,
.stack-col,
.channel,
.skill-card,
.bento-cell,
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--r-8);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}
.principle {
  padding: var(--s-24);
}
.principle__tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 var(--s-10, 10px);
  margin-bottom: var(--s-16);
  border-radius: var(--r-8);
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-family: var(--font-mono);
  font-size: var(--t-12);
  font-weight: 800;
}
.principle h4 {
  margin-bottom: var(--s-8);
  font-size: var(--t-20);
}
.principle p { color: var(--text-soft); font-size: var(--t-14); }

/* Products */
.bento {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-16);
  margin-top: var(--s-48);
}
@media (min-width: 860px) {
  .bento { grid-template-columns: repeat(12, 1fr); }
  .bento-cell { grid-column: span 6; }
  .bento-cell--feature { grid-column: span 7; grid-row: span 2; }
  .bento-cell:nth-child(2),
  .bento-cell:nth-child(3) { grid-column: span 5; }
  .bento-cell--split { grid-column: span 12; }
}
.bento-cell {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 280px;
  padding: var(--s-28, 28px);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02)), var(--dark-2);
  border-color: rgba(255,255,255,.12);
  color: var(--on-dark);
  box-shadow: none;
  transition: transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}
.bento-cell:hover {
  transform: translateY(-4px);
  border-color: rgba(255,87,1,.54);
}
.bento-cell::after {
  content: "";
  position: absolute;
  inset: auto -20% -34% 18%;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,87,1,.22), transparent 64%);
  pointer-events: none;
}
.bento-cell--feature { background: linear-gradient(135deg, rgba(255,87,1,.24), rgba(255,255,255,.05) 46%), var(--dark-2); }
.bento-cell--feature::before {
  content: "";
  position: absolute;
  left: var(--s-28, 28px);
  right: var(--s-28, 28px);
  bottom: 86px;
  height: 150px;
  border-radius: var(--r-8);
  background:
    linear-gradient(90deg, rgba(255,87,1,.55) 0 18%, transparent 18% 100%),
    linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255,255,255,.10) 1px, transparent 1px);
  background-size: 100% 3px, 44px 44px, 44px 44px;
  background-position: 0 50%, 0 0, 0 0;
  opacity: .42;
  pointer-events: none;
}
.bento-cell__head {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--s-16);
  margin-bottom: var(--s-24);
}
.bento-cell__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-8);
  align-items: center;
}
.bento-cell__tag,
.bento-cell__sub {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--on-dark-soft);
}
.bento-cell__num,
.skill-card__num {
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: var(--t-14);
  font-weight: 800;
}
.bento-cell__body,
.bento-cell__split,
.bento-cell__link,
.bento-cell h3,
.bento-cell__sub,
.bento-cell__desc,
.chips {
  position: relative;
  z-index: 1;
}
.bento-cell h3.display {
  margin-bottom: var(--s-8);
  font-size: clamp(var(--t-24), 3vw, var(--t-40));
}
.bento-cell--feature h3.display { font-size: clamp(var(--t-32), 5vw, var(--t-56)); }
.bento-cell__desc {
  margin: var(--s-16) 0 var(--s-20);
  color: var(--on-dark-soft);
}
.chips,
.taglist {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-8);
}
.chips li,
.taglist li {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 var(--s-10, 10px);
  border-radius: var(--r-8);
  font-family: var(--font-mono);
  font-size: var(--t-12);
  font-weight: 650;
}
.chips li {
  color: var(--on-dark);
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
}
.bento-cell__link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  align-self: flex-start;
  margin-top: auto;
  color: var(--primary);
  font-weight: 800;
}
.bento-cell__link:hover { gap: var(--s-12); color: #fff; }
.bento-cell__split {
  display: grid;
  gap: var(--s-24);
  align-items: end;
}
@media (min-width: 640px) {
  .bento-cell__split { grid-template-columns: 1fr auto; }
}
.bento-cell__qr {
  display: grid;
  justify-items: center;
  gap: var(--s-8);
  padding: var(--s-16);
  border-radius: var(--r-8);
  background: #fff;
  color: var(--text);
}
.bento-cell__qr img {
  width: 132px;
  height: 132px;
  border-radius: var(--r-4);
}
.bento-cell__qr-label {
  display: grid;
  justify-items: center;
  font-weight: 800;
}
.bento-cell__qr-label em {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--text-muted);
}

/* Stack, skills, content */
.stack,
.skills-grid,
.channels,
.contact {
  display: grid;
  gap: var(--s-16);
  margin-top: var(--s-48);
}
.stack { grid-template-columns: 1fr; }
@media (min-width: 900px) {
  .stack { grid-template-columns: repeat(12, 1fr); }
  .stack-col { grid-column: span 4; }
  .stack-col--featured { grid-column: span 6; }
}
.stack-col,
.channel {
  padding: var(--s-24);
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.stack-col:hover,
.channel:hover,
.principle:hover {
  transform: translateY(-3px);
  border-color: rgba(255,87,1,.35);
  box-shadow: var(--shadow);
}
.stack-col header,
.channel__head,
.skill-card__head {
  display: flex;
  align-items: flex-start;
  gap: var(--s-12);
  margin-bottom: var(--s-20);
}
.stack-col__icon,
.channel__icon {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: var(--r-8);
  background: var(--primary);
  color: #fff;
  font-weight: 900;
}
.stack-col h4,
.channel h3 {
  font-size: var(--t-20);
  color: var(--text);
}
.stack-col header p,
.channel__platform,
.channel__status {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--text-muted);
}
.taglist li {
  color: var(--text-soft);
  background: var(--secondary);
  border: 1px solid var(--line);
}
.taglist li:hover {
  color: var(--primary);
  border-color: var(--primary-soft);
  background: var(--primary-soft);
}
.skills-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
}
.skill-card {
  padding: var(--s-24);
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.12);
  box-shadow: none;
  color: var(--on-dark);
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.skill-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,87,1,.5);
  background: rgba(255,255,255,.09);
}
.skill-card--accent {
  background: linear-gradient(135deg, rgba(255,87,1,.22), rgba(255,255,255,.06));
}
.skill-card__head h3 {
  color: var(--on-dark);
  font-size: var(--t-24);
}
.skill-card__head p { color: var(--on-dark-soft); font-family: var(--font-mono); font-size: var(--t-12); }
.skill-list {
  display: grid;
  gap: var(--s-12);
}
.skill-list li {
  display: grid;
  gap: var(--s-6, 6px);
  padding: var(--s-12);
  border-radius: var(--r-8);
  background: rgba(255,255,255,.06);
}
.skill-list code {
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: var(--t-14);
  font-weight: 800;
  word-break: break-word;
}
.skill-list span { color: var(--on-dark-soft); font-size: var(--t-14); }
.skills-footnote {
  margin-top: var(--s-32);
  text-align: center;
  color: var(--on-dark-soft);
  font-family: var(--font-mono);
  font-size: var(--t-12);
}
.skills-footnote code {
  color: var(--primary);
  padding: var(--s-4) var(--s-8);
  border-radius: var(--r-4);
  background: rgba(255,255,255,.08);
}
.channels { grid-template-columns: 1fr; }
@media (min-width: 760px) { .channels { grid-template-columns: repeat(2, 1fr); } }
.channel__desc {
  margin: var(--s-16) 0;
  color: var(--text-soft);
}
.channel__foot {
  margin-top: var(--s-20);
  padding-top: var(--s-16);
  border-top: 1px solid var(--line);
}

/* Vision, contact, footer */
.section--vision { text-align: center; }
.vision { max-width: var(--maxw); }
.display--vision {
  max-width: 820px;
  margin: var(--s-16) auto;
  font-size: clamp(var(--t-32), 5vw, var(--t-56));
}
.vision__sub {
  max-width: 680px;
  margin: 0 auto var(--s-48);
  color: var(--on-dark-soft);
  font-size: var(--t-18);
}
.contact {
  grid-template-columns: 1fr;
  text-align: left;
}
@media (min-width: 560px) { .contact { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .contact { grid-template-columns: repeat(3, 1fr); } }
.contact-card {
  position: relative;
  display: grid;
  gap: var(--s-4);
  min-height: 112px;
  padding: var(--s-24);
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.12);
  box-shadow: none;
  color: var(--on-dark);
}
.contact-card:not(.contact-card--static):hover {
  transform: translateY(-4px);
  border-color: rgba(255,87,1,.5);
  background: rgba(255,255,255,.09);
}
.contact-card__label {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--primary);
  font-weight: 800;
}
.contact-card__value {
  font-size: var(--t-18);
  font-weight: 800;
}
.contact-card__arrow {
  position: absolute;
  top: var(--s-20);
  right: var(--s-20);
  color: var(--on-dark-soft);
}
.contact-card:hover .contact-card__arrow { color: var(--primary); transform: translate(2px, -2px); }
.footer {
  padding: var(--s-64) 0 var(--s-32);
  background: #0B0E13;
  color: var(--on-dark-soft);
}
.footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-32);
  padding-bottom: var(--s-40);
  border-bottom: 1px solid rgba(255,255,255,.12);
}
@media (min-width: 760px) {
  .footer__top { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
}
.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
  margin-bottom: var(--s-16);
  color: var(--on-dark);
  font-size: var(--t-24);
  font-weight: 900;
}
.footer__tag,
.footer__muted,
.footer__col a {
  color: var(--on-dark-soft);
}
.footer__col h5 {
  margin-bottom: var(--s-16);
  color: var(--on-dark);
  font-family: var(--font-mono);
  font-size: var(--t-12);
}
.footer__col ul {
  display: grid;
  gap: var(--s-10, 10px);
}
.footer__col a:hover { color: var(--primary); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-12);
  margin-top: var(--s-32);
  font-family: var(--font-mono);
  font-size: var(--t-12);
}

/* Motion and accessibility */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .65s var(--ease), transform .65s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }
:where(a, button, .btn, [tabindex]):focus-visible {
  outline: 3px solid rgba(255, 87, 1, .62);
  outline-offset: 3px;
  border-radius: var(--r-8);
}
@media (max-width: 720px) {
  .hero { padding-top: var(--s-48); }
  .hero__grid { padding-bottom: var(--s-48); }
  .hero__title { font-size: clamp(2.7rem, 16vw, 4rem); }
  .hero__ctas .btn { width: 100%; }
  .sig-card__list > div { grid-template-columns: 72px 1fr; }
  .bento-cell,
  .stack-col,
  .channel,
  .skill-card,
  .principle,
  .contact-card { padding: var(--s-20); }
}
@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;
  }
  .reveal { opacity: 1; transform: none; }
}