/* ============================================================
   Rahul Gupta — personal site
   Design system: Kaia AI brand DNA, editorial serif-led register
   Hand-built. No frameworks.
   ============================================================ */

:root {
  --bg: #0a0a0f;
  --bg-raise: #10101a;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.055);
  --line: rgba(255, 255, 255, 0.08);
  --line-soft: rgba(255, 255, 255, 0.06);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #f8f9fa;
  --text-80: rgba(248, 249, 250, 0.8);
  --text-64: rgba(248, 249, 250, 0.64);
  --text-48: rgba(248, 249, 250, 0.48);
  --blue: #0066ff;
  --teal: #00d4aa;
  --amber: #fcd34d;
  --amber-soft: #fde68a;
  --grad: linear-gradient(135deg, #0066ff 0%, #00d4aa 100%);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Instrument Serif", Georgia, "Times New Roman", serif;
  --font-body: "DM Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --w: 1120px;
  --gutter: clamp(1.25rem, 4vw, 2rem);
  --section: clamp(5rem, 10vh, 8.5rem);
}

/* ---------- reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  background: var(--bg);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--text);
  text-decoration: none;
}
p a,
li a:not([class]) {
  color: var(--text-80);
  text-decoration: underline;
  text-decoration-color: rgba(0, 212, 170, 0.45);
  text-underline-offset: 3px;
  transition: color 0.2s var(--ease), text-decoration-color 0.2s var(--ease);
}
p a:hover,
li a:not([class]):hover {
  color: var(--teal);
  text-decoration-color: var(--teal);
}
::selection {
  background: rgba(0, 212, 170, 0.28);
  color: #fff;
}
:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 4px;
}

/* scrollbar — Kaia grammar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--blue);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--teal);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 100;
  background: var(--blue);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0 0 8px 0;
  font-size: 0.875rem;
}
.skip-link:focus {
  left: 0;
}

.wrap {
  max-width: var(--w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- typography ---------- */
h1,
h2,
h3 {
  font-weight: 400;
  margin: 0;
}
.display {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  line-height: 1.06;
}
.kicker {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-48);
  display: block;
  margin-bottom: 1.1rem;
}
.kicker--amber {
  color: var(--amber);
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.serif-i {
  font-style: italic;
}
.prose {
  max-width: 68ch;
}
.prose p {
  color: var(--text-64);
  margin: 0 0 1.2em;
}
.prose strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- header / nav ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: 72px;
  display: flex;
  align-items: center;
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease),
    backdrop-filter 0.35s var(--ease);
  border-bottom: 1px solid transparent;
  view-transition-name: site-header;
}
.site-header.scrolled {
  background: rgba(10, 10, 15, 0.8);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border-bottom-color: var(--line-soft);
}
.site-header .wrap {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.brand-tile {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--grad);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: #fff;
  flex: none;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text);
  white-space: nowrap;
}
.brand-suffix {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-48);
  margin-left: 0.15rem;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.9rem;
}
.site-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-80);
  transition: color 0.2s var(--ease);
  position: relative;
  padding: 0.25rem 0;
}
.site-nav a:hover {
  color: var(--text);
}
.site-nav a[aria-current] {
  color: var(--text);
}
.site-nav a[aria-current]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--grad);
  border-radius: 2px;
}
.nav-cta {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  padding: 0.5rem 1.05rem !important;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav-cta:hover {
  border-color: var(--line-strong);
  background: var(--surface-2);
}
.menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  color: var(--text);
  place-items: center;
}
.menu-btn svg {
  display: block;
}

/* reading progress */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 60;
  background: var(--grad);
  transform-origin: 0 50%;
  transform: scaleX(0);
  pointer-events: none;
}
@supports (animation-timeline: scroll(root)) {
  .progress {
    animation: progress-grow linear both;
    animation-timeline: scroll(root);
  }
  @keyframes progress-grow {
    to {
      transform: scaleX(1);
    }
  }
}

/* mobile nav */
@media (max-width: 860px) {
  .site-nav {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(10, 10, 15, 0.96);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--line-soft);
    padding: 0.5rem var(--gutter) 1.25rem;
    display: none;
  }
  .site-nav.open {
    display: flex;
  }
  .site-nav a {
    padding: 0.8rem 0;
    font-size: 1.0625rem;
    width: 100%;
  }
  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }
  .menu-btn {
    display: grid;
  }
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  min-height: clamp(560px, 92vh, 920px);
  display: flex;
  align-items: center;
  overflow: clip;
  padding-top: 72px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      ellipse 80% 55% at 18% 8%,
      rgba(0, 102, 255, 0.16),
      transparent 60%
    ),
    linear-gradient(
      120deg,
      rgba(0, 212, 170, 0.06),
      transparent 45%,
      rgba(0, 102, 255, 0.07)
    );
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle at 1px 1px,
    rgba(0, 102, 255, 0.3) 1px,
    transparent 0
  );
  background-size: 40px 40px;
  opacity: 0.18;
  -webkit-mask-image: radial-gradient(
    ellipse 90% 80% at 50% 20%,
    #000 30%,
    transparent 75%
  );
  mask-image: radial-gradient(
    ellipse 90% 80% at 50% 20%,
    #000 30%,
    transparent 75%
  );
}
#lattice {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.hero .wrap {
  position: relative;
  z-index: 2;
  padding-block: 5rem 6rem;
}
.hero h1 {
  font-size: clamp(2.6rem, 6.5vw, 5.1rem);
  max-width: 26ch;
}
.hero-sub {
  margin: 1.75rem 0 0;
  max-width: 58ch;
  font-size: clamp(1.0325rem, 1.5vw, 1.1875rem);
  color: var(--text-64);
}
.hero-sub strong {
  color: var(--text-80);
  font-weight: 600;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2.4rem;
}

/* staged entrance */
.reveal-line {
  display: block;
  overflow: hidden;
}
.reveal-line > span {
  display: block;
  transform: translateY(112%);
  animation: rise 0.85s var(--ease) forwards;
}
.reveal-line:nth-child(2) > span {
  animation-delay: 0.09s;
}
.r-delay-1 {
  opacity: 0;
  animation: fade-up 0.8s var(--ease) 0.28s forwards;
}
.r-delay-2 {
  opacity: 0;
  animation: fade-up 0.8s var(--ease) 0.42s forwards;
}
.r-delay-3 {
  opacity: 0;
  animation: fade-up 0.8s var(--ease) 0.56s forwards;
}
@keyframes rise {
  to {
    transform: translateY(0);
  }
}
@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%);
  z-index: 2;
  color: var(--text-48);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.scroll-cue::after {
  content: "";
  width: 1px;
  height: 34px;
  background: linear-gradient(var(--teal), transparent);
  animation: cue 2.2s var(--ease) infinite;
}
@keyframes cue {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  45% {
    transform: scaleY(1);
    transform-origin: top;
  }
  55% {
    transform: scaleY(1);
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 10px;
  padding: 0.85rem 1.6rem;
  font-size: 0.9375rem;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease), color 0.25s var(--ease);
  will-change: transform;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover {
  background: #1a75ff;
  box-shadow: 0 8px 32px rgba(0, 102, 255, 0.3);
}
.btn-ghost {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-80);
}
.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
}
.btn .arr {
  transition: transform 0.25s var(--ease);
}
.btn:hover .arr {
  transform: translateX(3px);
}

/* ---------- sections ---------- */
.section {
  padding-block: var(--section);
  position: relative;
}
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: 1.5rem 4rem;
  align-items: end;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}
.section-head h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}
.section-head .lede {
  color: var(--text-64);
  max-width: 52ch;
  margin: 0;
  font-size: 1.0625rem;
}
@media (max-width: 860px) {
  .section-head {
    grid-template-columns: 1fr;
    align-items: start;
  }
}
.hairline {
  border: 0;
  height: 1px;
  background: var(--line-soft);
  margin: 0;
}
.grad-hairline {
  height: 1px;
  border: 0;
  background: var(--grad);
  opacity: 0.55;
  margin: 0;
}

/* ---------- proof bar ---------- */
.proof {
  border-block: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.015);
}
.proof .wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding-block: 2.75rem;
}
.stat {
  min-width: 0;
}
.stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.1;
  white-space: nowrap;
}
.stat-num .accent {
  color: var(--teal);
}
.stat-label {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-48);
  line-height: 1.45;
  max-width: 24ch;
}
@media (max-width: 860px) {
  .proof .wrap {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem 1.5rem;
  }
}

/* ---------- now / kaia ---------- */
.now-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}
@media (max-width: 860px) {
  .now-grid {
    grid-template-columns: 1fr;
  }
}
.portrait {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  max-width: 420px;
  justify-self: end;
}
.portrait img {
  width: 100%;
  filter: grayscale(0.9) contrast(1.05);
}
.portrait::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
      160deg,
      rgba(0, 102, 255, 0.28),
      rgba(0, 212, 170, 0.12) 55%,
      rgba(10, 10, 15, 0.15)
    ),
    linear-gradient(to top, rgba(10, 10, 15, 0.55), transparent 45%);
  mix-blend-mode: multiply;
}
.portrait-cap {
  position: absolute;
  left: 1rem;
  bottom: 0.9rem;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(248, 249, 250, 0.85);
}
@media (max-width: 860px) {
  .portrait {
    justify-self: start;
    max-width: 340px;
  }
}
.kaia-verticals {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.6rem;
}
.pill {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 0.38rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-64);
}

/* ---------- thesis ---------- */
.thesis {
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(0, 102, 255, 0.035) 30%,
    rgba(0, 212, 170, 0.03) 70%,
    transparent
  );
}
.thesis-quote {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.6vw, 2.7rem);
  line-height: 1.25;
  max-width: 26ch;
  margin: 0 0 2.5rem;
}
.thesis-body {
  columns: 2;
  column-gap: 4rem;
  max-width: 100%;
}
.thesis-body p {
  color: var(--text-64);
  margin: 0 0 1.2em;
  break-inside: avoid;
}
.thesis-body p strong {
  color: var(--text);
}
@media (max-width: 860px) {
  .thesis-body {
    columns: 1;
  }
}
.thesis-2018 {
  border-left: 2px solid var(--teal);
  padding: 0.35rem 0 0.35rem 1.4rem;
  margin: 1.8rem 0;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--text-80);
}
.thesis-2018 cite {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

/* ---------- timeline ---------- */
.timeline {
  position: relative;
  margin-top: 1rem;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--line-soft);
}
.timeline-draw {
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--grad);
  transform-origin: top;
  transform: scaleY(1);
}
@supports (animation-timeline: view()) {
  .timeline-draw {
    animation: draw linear both;
    animation-timeline: view();
    animation-range: entry 10% exit 85%;
  }
  @keyframes draw {
    from {
      transform: scaleY(0);
    }
    to {
      transform: scaleY(1);
    }
  }
}
.t-item {
  position: relative;
  padding: 0 0 3.2rem 2.6rem;
}
.t-item:last-child {
  padding-bottom: 0.5rem;
}
.t-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--teal);
  box-shadow: 0 0 0 4px rgba(0, 212, 170, 0.12);
}
.t-item--now::before {
  background: var(--teal);
  box-shadow: 0 0 18px rgba(0, 212, 170, 0.5);
}
@supports (animation-timeline: view()) {
  .t-item {
    animation: t-in linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 42%;
  }
  @keyframes t-in {
    from {
      opacity: 0.45;
      transform: translateY(14px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}
.t-period {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
}
.t-role {
  font-size: 1.375rem;
  font-weight: 600;
  margin-top: 0.35rem;
}
.t-org {
  color: var(--text-64);
  font-weight: 400;
}
.t-line {
  color: var(--text-64);
  margin: 0.55rem 0 0.9rem;
  max-width: 62ch;
}
.t-points {
  margin: 0;
  padding: 0;
  list-style: none;
  max-width: 66ch;
}
.t-points li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--text-48);
  font-size: 0.9375rem;
  margin-bottom: 0.45rem;
  line-height: 1.55;
}
.t-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.58em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  opacity: 0.7;
}
.t-points li strong {
  color: var(--text-80);
  font-weight: 600;
}

/* ---------- cards (track record / work) ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.1rem;
}
.card {
  position: relative;
  border: 1px solid var(--line-soft);
  background: var(--surface);
  border-radius: 16px;
  padding: 1.6rem 1.5rem 1.5rem;
  overflow: hidden;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.card:hover {
  border-color: var(--line-strong);
  background: var(--surface-2);
}
@media (hover: hover) and (pointer: fine) {
  .card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(
      260px circle at var(--mx, 50%) var(--my, 50%),
      rgba(0, 212, 170, 0.09),
      transparent 65%
    );
    opacity: 0;
    transition: opacity 0.3s var(--ease);
    pointer-events: none;
  }
  .card:hover::before {
    opacity: 1;
  }
}
.card-cat {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  display: block;
  margin-bottom: 0.7rem;
}
.card h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.6rem;
}
.card p {
  color: var(--text-48);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.6;
}
.card p strong {
  color: var(--text-80);
  font-weight: 600;
}

/* filter row (projects page) */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.2rem;
}
.filter-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text-64);
  border-radius: 999px;
  padding: 0.45rem 1.05rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}
.filter-btn:hover {
  color: var(--text);
  border-color: var(--line-strong);
}
.filter-btn[aria-pressed="true"] {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.card.hidden {
  display: none;
}

/* ---------- writing ---------- */
.essay-list {
  display: grid;
  gap: 0;
}
.essay {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
  gap: 1rem 3rem;
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--line-soft);
  align-items: baseline;
  transition: background 0.2s var(--ease);
}
.essay:first-child {
  border-top: 1px solid var(--line-soft);
}
.essay h3 {
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 2.4vw, 1.75rem);
  line-height: 1.25;
  transition: color 0.2s var(--ease);
}
.essay:hover h3 {
  color: var(--teal);
}
.essay .dek {
  color: var(--text-48);
  font-size: 0.9375rem;
  margin: 0.5rem 0 0;
  max-width: 60ch;
}
.essay-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-48);
  text-align: right;
  white-space: nowrap;
}
@media (max-width: 700px) {
  .essay {
    grid-template-columns: 1fr;
  }
  .essay-meta {
    text-align: left;
    order: -1;
  }
}

/* article page */
.article {
  padding-top: calc(72px + 4rem);
  padding-bottom: var(--section);
}
.article-head {
  max-width: 760px;
  margin: 0 auto 3rem;
}
.article-head h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
}
.article-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--text-48);
  margin-top: 1.2rem;
}
.article-body {
  max-width: 68ch;
  margin: 0 auto;
}
.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  margin: 2.2em 0 0.6em;
}
.article-body p,
.article-body li {
  color: var(--text-64);
}
.article-body p {
  margin: 0 0 1.25em;
}
.article-body ul,
.article-body ol {
  padding-left: 1.3rem;
  margin: 0 0 1.25em;
}
.article-body li {
  margin-bottom: 0.5em;
}
.article-body strong {
  color: var(--text);
}
.back-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-48);
  display: inline-flex;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  transition: color 0.2s var(--ease);
}
.back-link:hover {
  color: var(--teal);
}

/* ---------- speaking strip ---------- */
.speak-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.1rem;
}

/* ---------- testimonials ---------- */
.quote-list {
  display: grid;
  gap: clamp(2.5rem, 6vw, 4rem);
}
.pull-quote {
  margin: 0;
  max-width: 56ch;
}
.pull-quote:nth-child(even) {
  justify-self: end;
  text-align: left;
}
.pull-quote p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.25rem, 2.4vw, 1.625rem);
  line-height: 1.45;
  color: var(--text-80);
  margin: 0 0 1.1rem;
}
.pull-quote p::before {
  content: "\201C";
  color: var(--teal);
  margin-right: 0.1em;
}
.pull-quote p::after {
  content: "\201D";
  color: var(--teal);
  margin-left: 0.05em;
}
.pull-quote footer {
  font-size: 0.9375rem;
  color: var(--text-48);
}
.pull-quote footer strong {
  color: var(--text-80);
  font-weight: 600;
  display: block;
}

/* ---------- advisory ---------- */
.lane-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.1rem;
}
.lane {
  border: 1px solid rgba(0, 212, 170, 0.18);
  background: rgba(0, 212, 170, 0.035);
  border-radius: 16px;
  padding: 1.7rem 1.5rem;
}
.lane h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.lane h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  flex: none;
}
.lane p {
  color: var(--text-48);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.6;
}

/* ---------- contact ---------- */
.contact-box {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: radial-gradient(
      ellipse 90% 130% at 15% -20%,
      rgba(0, 102, 255, 0.12),
      transparent 55%
    ),
    var(--surface);
  padding: clamp(2.2rem, 5vw, 3.6rem);
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 2.5rem;
  align-items: center;
}
@media (max-width: 860px) {
  .contact-box {
    grid-template-columns: 1fr;
  }
}
.contact-box h2 {
  font-size: clamp(1.9rem, 4vw, 2.7rem);
}
.contact-box .lede {
  color: var(--text-64);
  margin: 1rem 0 0;
  max-width: 46ch;
}
.contact-actions {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  align-items: stretch;
}
.contact-actions .btn {
  justify-content: center;
}
.contact-note {
  font-size: 0.875rem;
  color: var(--text-48);
  text-align: center;
  margin: 0;
}

/* contact page form */
.form {
  display: grid;
  gap: 1rem;
  max-width: 560px;
}
.form label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-80);
  display: grid;
  gap: 0.45rem;
}
.form input,
.form textarea {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.8rem 1rem;
  transition: border-color 0.2s var(--ease);
  width: 100%;
}
.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--teal);
}
.form textarea {
  min-height: 130px;
  resize: vertical;
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--line-soft);
  padding: 3rem 0 3.5rem;
  margin-top: var(--section);
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 3rem;
  justify-content: space-between;
  align-items: flex-start;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.6rem;
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--text-48);
  transition: color 0.2s var(--ease);
}
.footer-links a:hover {
  color: var(--text);
}
.footer-note {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-48);
  letter-spacing: 0.04em;
}
.footer-note a {
  color: var(--text-64);
}

/* ---------- page transitions ---------- */
@view-transition {
  navigation: auto;
}
@media (prefers-reduced-motion: no-preference) {
  ::view-transition-old(root) {
    animation: vt-out 0.22s ease both;
  }
  ::view-transition-new(root) {
    animation: vt-in 0.26s ease both;
  }
  @keyframes vt-out {
    to {
      opacity: 0;
      transform: translateY(-6px);
    }
  }
  @keyframes vt-in {
    from {
      opacity: 0;
      transform: translateY(8px);
    }
  }
}

/* ---------- inner page hero ---------- */
.page-head {
  padding-top: calc(72px + clamp(3.5rem, 8vh, 6rem));
  padding-bottom: clamp(2rem, 5vh, 3.5rem);
}
.page-head h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
}
.page-head .lede {
  color: var(--text-64);
  max-width: 56ch;
  margin: 1.2rem 0 0;
  font-size: 1.0625rem;
}

/* tech strip */
.tech-strip {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 2.1;
  color: var(--text-48);
  letter-spacing: 0.02em;
  max-width: 90ch;
}
.tech-strip strong {
  color: var(--teal);
  font-weight: 500;
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal-line > span {
    transform: none;
    animation: none;
  }
  .r-delay-1,
  .r-delay-2,
  .r-delay-3 {
    opacity: 1;
    animation: none;
  }
  .scroll-cue::after {
    animation: none;
  }
  #lattice {
    display: none;
  }
}

/* print */
@media print {
  .site-header,
  .scroll-cue,
  #lattice,
  .progress {
    display: none;
  }
  body {
    background: #fff;
    color: #111;
  }
}

/* keynote grid: last card spans the remaining row */
.speak-grid > .card:last-child {
  grid-column: 1 / -1;
}