/* =========================================================
   Prasad Akki — Portfolio styles
   Editorial-modern dark theme · warm amber accent
   ========================================================= */

:root {
  --bg: #0b0b0c;
  --bg-elev: #131316;
  --bg-card: #141418;
  --ink: #fafafa;
  --ink-soft: #d6d6d6;
  --ink-mute: #9a9a9e;
  --ink-dim: #6b6b70;
  --line: rgba(255, 255, 255, 0.08);
  --line-soft: rgba(255, 255, 255, 0.05);
  --accent: #f4b942;       /* warm amber */
  --accent-soft: #f4b94222;
  --accent-2: #b6e3ff;     /* cool blue secondary */
  --danger: #ff6a6a;
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1180px;
  --pad-x: clamp(20px, 4vw, 56px);
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Instrument Serif', 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --shadow-1: 0 1px 0 rgba(255,255,255,0.04) inset, 0 30px 60px -30px rgba(0,0,0,0.6);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
em { font-style: italic; color: var(--accent); font-family: var(--font-serif); font-weight: 400; }
strong { color: var(--ink); font-weight: 600; }
ul { padding-left: 1.1em; margin: 0; }
ul.bullets { list-style: none; padding-left: 0; }
ul.bullets li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
ul.bullets li::before {
  content: "";
  position: absolute;
  top: 0.7em;
  left: 0;
  width: 8px; height: 1px;
  background: var(--accent);
}

/* ---------- background fx ---------- */
.grain {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.6'/></svg>");
}
.spotlight {
  position: fixed;
  top: 0; left: 0;
  width: 600px; height: 600px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(244, 185, 66, 0.10) 0%, rgba(244, 185, 66, 0) 60%);
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.3s ease;
  will-change: transform;
}

/* ---------- layout helpers ---------- */
.section {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(80px, 12vw, 160px) var(--pad-x) 0;
}
.section-head {
  max-width: 820px;
  margin-bottom: clamp(40px, 6vw, 64px);
}
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  padding: 4px 10px;
  border: 1px solid var(--accent-soft);
  border-radius: 999px;
  background: var(--accent-soft);
}
.section-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.05;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}
.section-title em { font-style: italic; color: var(--accent); font-family: var(--font-serif); }
.section-lede {
  color: var(--ink-mute);
  font-size: clamp(15px, 1.4vw, 17px);
  max-width: 60ch;
  margin: 0;
}

/* ---------- NAV ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px var(--pad-x);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: rgba(11, 11, 12, 0.65);
  border-bottom: 1px solid var(--line-soft);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}
.brand-mark.small { width: 22px; height: 22px; font-size: 10px; }
.brand-name { font-size: 15px; }
.nav-links {
  display: flex;
  gap: 22px;
  font-size: 14px;
  color: var(--ink-mute);
}
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  font-size: 13px;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
}
.nav-cta:hover {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
@media (max-width: 760px) {
  .nav-links { display: none; }
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(60px, 9vw, 120px) var(--pad-x) clamp(40px, 6vw, 80px);
}
.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-mute);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255,255,255,0.02);
  margin-bottom: 28px;
}
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--ink-dim);
  display: inline-block;
}
.dot.live {
  background: #4ade80;
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5); }
  70%  { box-shadow: 0 0 0 8px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}
.hero-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(44px, 7.2vw, 96px);
  line-height: 1.0;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  max-width: 12ch;
}
.hero-sub {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0 0 36px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: clamp(60px, 8vw, 96px);
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn-primary:hover { background: #ffcb5c; border-color: #ffcb5c; }
.btn-ghost:hover {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.18);
}
.copy-email .copy-label {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-mute);
}
.copy-email:hover .copy-label { color: var(--ink); }

/* ---------- BENTO ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.bento-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
  min-height: 158px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
  overflow: hidden;
}
.bento-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(800px circle at var(--mx, 50%) var(--my, 0%), rgba(244, 185, 66, 0.08), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.bento-card:hover::before { opacity: 1; }
.bento-card:hover { transform: translateY(-2px); border-color: rgba(255,255,255,0.14); }
.bento-card.span-2 { grid-column: span 2; }
.kpi-num {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.kpi-unit {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-top: 6px;
}
.kpi-label {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--ink-mute);
}
.quote-card p {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(20px, 2vw, 26px);
  line-height: 1.3;
  color: var(--ink-soft);
  margin: 0;
}
@media (max-width: 900px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .bento-card.span-2 { grid-column: span 2; }
}
@media (max-width: 520px) {
  .bento { grid-template-columns: 1fr; }
  .bento-card.span-2 { grid-column: span 1; }
}

/* ---------- PRESS & TALKS ---------- */
.talk-featured { margin: 0; }
.talk-meta-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
}
.talk-pill {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  background: rgba(255,255,255,0.02);
}
.talk-pill-accent {
  color: var(--accent);
  border-color: rgba(244, 185, 66, 0.4);
  background: var(--accent-soft);
}
.talk-meta-sep { color: var(--ink-dim); }
.talk-format, .talk-host, .talk-channel { color: var(--ink-soft); }

/* featured video card (still used for the prominent embed) */
.featured-video {
  margin: 0;
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-card);
  box-shadow: var(--shadow-1);
}
.yt-facade {
  display: block;
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  padding: 0;
  margin: 0;
  border: 0;
  background: #000;
  cursor: pointer;
  overflow: hidden;
  font-family: inherit;
  color: inherit;
}
.yt-facade:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.yt-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.05) brightness(0.92);
  transition: filter 0.3s ease, transform 0.6s ease;
}
.yt-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.0) 30%, rgba(0,0,0,0.55) 100%);
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.yt-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  display: grid;
  place-items: center;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 0 6px rgba(244, 185, 66, 0.18);
  transition: transform 0.25s ease, background 0.2s ease, box-shadow 0.25s ease;
  pointer-events: none;
}
.yt-play svg { margin-left: 3px; }
.yt-facade:hover .yt-thumb { filter: saturate(1.1) brightness(0.78); transform: scale(1.025); }
.yt-facade:hover .yt-play {
  transform: translate(-50%, -50%) scale(1.08);
  background: #ffcb5c;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.55), 0 0 0 10px rgba(244, 185, 66, 0.22);
}
.yt-overlay {
  position: absolute;
  left: clamp(16px, 2.2vw, 28px);
  right: clamp(16px, 2.2vw, 28px);
  bottom: clamp(14px, 2vw, 22px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
  color: var(--ink);
  pointer-events: none;
}
.yt-channel {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: max-content;
  max-width: 100%;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.yt-title {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.2vw, 26px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
  max-width: 36ch;
}

.featured-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  background: rgba(255, 255, 255, 0.015);
}
.featured-cta a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  transition: color 0.2s;
}
.featured-cta a:hover { color: var(--accent); }
.featured-sep { color: var(--ink-dim); }
.featured-meta { color: var(--ink-mute); }

@media (max-width: 600px) {
  .yt-play { width: 64px; height: 64px; }
  .yt-play svg { width: 22px; height: 22px; }
  .featured-cta { padding: 12px 16px; flex-wrap: wrap; gap: 8px; }
}

/* ---------- TALKS GRID (compact cards under the featured talk) ---------- */
.talks-more { margin-top: clamp(36px, 5vw, 56px); }
.talks-more:empty { display: none; }
.talks-more-heading {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 16px;
}
.talks-more-heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-soft);
}
.talks-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.talk-card {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 14px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.15s ease;
  position: relative;
  color: inherit;
}
.talk-card:hover {
  border-color: rgba(244, 185, 66, 0.35);
  background: #17171c;
  transform: translateY(-1px);
}
.talk-card:hover .talk-card-arrow { color: var(--accent); transform: translate(2px, -2px); }
.talk-card:hover .talk-card-play { transform: translate(-50%, -50%) scale(1.1); background: var(--accent); color: var(--bg); }

.talk-card-thumb {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  overflow: hidden;
  background: linear-gradient(135deg, #1a1a20, #0e0e12);
  border: 1px solid var(--line-soft);
}
.talk-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.92);
}
.talk-card-thumb-fallback::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(244, 185, 66, 0.2), transparent 60%);
}
.talk-card-type-icon {
  position: absolute;
  top: 8px;
  left: 8px;
  width: 22px;
  height: 22px;
  padding: 4px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.6);
  color: var(--accent);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
}
.talk-card-type-icon svg { width: 100%; height: 100%; display: block; }
.talk-card-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(244, 185, 66, 0.9);
  color: var(--bg);
  display: grid;
  place-items: center;
  transition: transform 0.2s, background 0.2s, color 0.2s;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.4);
}
.talk-card-play svg { margin-left: 1px; }

.talk-card-body { min-width: 0; }
.talk-card-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 6px;
}
.talk-card-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 4px;
  color: var(--ink);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.talk-card-desc {
  font-size: 13px;
  color: var(--ink-mute);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.talk-card-arrow {
  color: var(--ink-mute);
  font-size: 16px;
  transition: color 0.2s, transform 0.2s;
}

@media (max-width: 820px) {
  .talks-grid { grid-template-columns: 1fr; }
  .talk-card { grid-template-columns: 120px 1fr auto; }
}
@media (max-width: 480px) {
  .talk-card { grid-template-columns: 1fr; padding: 14px; }
  .talk-card-thumb { aspect-ratio: 16 / 9; }
  .talk-card-arrow { display: none; }
}

/* ---------- LOGO MARQUEE (scrolling sticker band) ---------- */
.marquee {
  position: relative;
  z-index: 2;
  margin-top: clamp(40px, 6vw, 64px);
  padding: 26px 0 30px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}
.marquee-label {
  text-align: center;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 11px;
  color: var(--ink-dim);
  margin-bottom: 22px;
}
.marquee-track {
  display: block;
  width: 100%;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
}
.marquee-row {
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 20px;
  animation: marquee 40s linear infinite;
  padding-right: 20px;
  white-space: nowrap;
  will-change: transform;
}
.marquee:hover .marquee-row { animation-play-state: paused; }
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* Single sticker — fixed height, flex-laid-out internals */
.sticker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  flex: 0 0 auto;
  height: 68px;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 8px 24px -10px rgba(0,0,0,0.55);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.sticker:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px -10px rgba(0,0,0,0.65);
}

/* Image-bearing stickers — wordmark logos like Amazon, Accenture */
.sticker.sticker-img {
  padding: 0 26px;
}
.sticker.sticker-img img {
  display: block;
  height: 36px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  margin: 0;
}
/* Wide / banner-format logos like Bytelearn, ConveGenius — let them breathe edge-to-edge */
.sticker.sticker-wide {
  padding: 0;
}
.sticker.sticker-wide img {
  display: block;
  height: 68px;
  width: auto;
  max-width: 280px;
  object-fit: cover;
}

/* Text stickers — affiliations like UMass Lowell, BVBIEEE */
.sticker.sticker-text {
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 4px;
  padding: 0 26px;
  background: #f6f3eb;
}
.sticker.sticker-text .sticker-text-main {
  display: block;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.01em;
  color: #1a1a1a;
}
.sticker.sticker-text .sticker-text-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #6b6b70;
  line-height: 1;
}

@media (max-width: 740px) {
  .sticker { height: 56px; border-radius: 13px; }
  .sticker.sticker-img { padding: 0 18px; }
  .sticker.sticker-img img { height: 28px; max-width: 170px; }
  .sticker.sticker-wide img { height: 56px; max-width: 220px; }
  .sticker.sticker-text { padding: 0 18px; gap: 3px; }
  .sticker.sticker-text .sticker-text-main { font-size: 19px; }
  .sticker.sticker-text .sticker-text-sub { font-size: 9px; }
  .marquee-row { gap: 14px; animation-duration: 30s; }
}

@media (prefers-reduced-motion: reduce) {
  .marquee-row {
    animation: none;
    flex-wrap: wrap;
    justify-content: center;
    padding-right: 0;
  }
  .marquee-track {
    -webkit-mask-image: none;
            mask-image: none;
  }
}

/* ---------- CASE STUDIES ---------- */
.case {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(24px, 3.5vw, 40px);
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}
.case::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.25;
}
.case-head { margin-bottom: 28px; }
.case-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--ink-mute);
  font-family: var(--font-mono);
  font-size: 12px;
  margin-bottom: 14px;
}
.tag {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.case-when { letter-spacing: 0.04em; }
.case-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}
.case-onelinr {
  color: var(--ink-soft);
  max-width: 70ch;
  margin: 0;
  font-size: 16px;
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}
.case-grid h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin: 0 0 8px;
}
.case-grid p {
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 0;
}
@media (max-width: 820px) {
  .case-grid { grid-template-columns: 1fr; gap: 20px; }
}

/* ---------- ABOUT ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 36px;
  align-items: start;
}
.about-copy p {
  font-size: clamp(16px, 1.4vw, 18px);
  color: var(--ink-soft);
  margin: 0 0 18px;
  max-width: 60ch;
}
.about-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.about-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
}
.about-row:last-child { border-bottom: 0; padding-bottom: 0; }
.about-row:first-child { padding-top: 0; }
.about-key {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
}
.about-val { font-size: 14px; color: var(--ink); text-align: right; }
@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* ---------- LAB ---------- */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.lab-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.lab-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.16);
  background: #17171c;
}
.lab-num {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.14em;
  margin-bottom: 14px;
}
.lab-card h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 22px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
.lab-card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.55;
}
@media (max-width: 900px) { .lab-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .lab-grid { grid-template-columns: 1fr; } }

/* ---------- BLOG SECTION (Talks + Writing stacked) ---------- */
.section.blog .blog-block {
  margin-top: 44px;
}
.section.blog .blog-block:first-of-type {
  margin-top: 36px;
}
.section.blog .blog-block-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line-soft);
}
.section.blog .blog-block-title {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.1vw, 28px);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}
.section.blog .blog-block-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-dim);
  white-space: nowrap;
}

/* Inline-link helper (used in section lede) */
.inline-link {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.18);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.inline-link:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- WRITING CARDS ---------- */
.writing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.writing-loading,
.writing-empty {
  grid-column: 1 / -1;
  padding: 36px 24px;
  text-align: center;
  color: var(--ink-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
}
a.writing-card,
.writing-card {
  display: block;
  padding: 22px 26px 24px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
a.writing-card:hover,
.writing-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.16);
  background: #17171c;
}
.writing-card .writing-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 10px;
}
.writing-card .writing-meta-left {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.writing-card .writing-source {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 9.5px;
  letter-spacing: 0.16em;
  color: var(--ink-dim);
}
.writing-card .writing-source.self {
  color: var(--accent);
  border-color: var(--accent-soft);
  background: var(--accent-soft);
}
.writing-card .writing-arrow {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-dim);
  transition: transform 0.25s ease, color 0.25s ease;
}
.writing-card:hover .writing-arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}
.writing-card .writing-title {
  font-family: var(--font-serif);
  font-size: clamp(19px, 1.7vw, 22px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 400;
  color: var(--ink);
  margin: 0 0 8px;
}
.writing-card .writing-desc {
  font-size: 14px;
  color: var(--ink-mute);
  line-height: 1.55;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.writing-foot {
  margin-top: 24px;
}
.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.18);
  transition: gap 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}
.btn-text:hover {
  gap: 16px;
  border-color: var(--accent);
  color: var(--accent);
}

@media (max-width: 740px) {
  .writing-grid { grid-template-columns: 1fr; gap: 12px; }
  .writing-card { padding: 18px 20px 20px; }
  .section.blog .blog-block-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}

/* ---------- EXPERIENCE TIMELINE ---------- */
.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 4px; bottom: 4px;
  left: 130px;
  width: 1px;
  background: var(--line);
}
.t-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
}
.t-item:last-child { border-bottom: 0; }
.t-item::before {
  content: "";
  position: absolute;
  top: 36px;
  left: 126px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
}
.t-year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  padding-top: 6px;
}
.t-body h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(22px, 2.4vw, 28px);
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}
.t-co { color: var(--accent); font-style: italic; }
.t-loc {
  color: var(--ink-mute);
  font-size: 13px;
  margin: 0 0 12px;
}
@media (max-width: 700px) {
  .timeline::before { left: 6px; }
  .t-item { grid-template-columns: 1fr; gap: 8px; padding-left: 22px; }
  .t-item::before { left: 2px; top: 8px; }
}

/* ---------- TOOLBOX ---------- */
.tools {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.tool-group {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.tool-group h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin: 0 0 14px;
}
.tool-group ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tool-group ul li {
  font-size: 13px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
  background: rgba(255,255,255,0.02);
}
@media (max-width: 900px) { .tools { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .tools { grid-template-columns: 1fr; } }

/* ---------- NOW ---------- */
.now-card {
  background: linear-gradient(140deg, rgba(244, 185, 66, 0.08), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(244, 185, 66, 0.20);
  border-radius: var(--radius);
  padding: clamp(22px, 3vw, 32px);
}
.now-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.now-line {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.2vw, 26px);
  line-height: 1.4;
  color: var(--ink);
  margin: 0;
}
.now-mute { color: var(--ink-mute); }

/* ---------- CONTACT ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.contact-card {
  position: relative;
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 22px 24px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.contact-card:hover {
  background: #17171c;
  border-color: rgba(244, 185, 66, 0.35);
  transform: translateY(-1px);
}
.contact-key {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
}
.contact-val {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2vw, 22px);
  letter-spacing: -0.01em;
}
.contact-arrow {
  color: var(--accent);
  font-size: 18px;
}
@media (max-width: 760px) { .contact-grid { grid-template-columns: 1fr; } }

/* ---------- FOOTER ---------- */
.footer {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin: clamp(100px, 12vw, 140px) auto 0;
  padding: 30px var(--pad-x) 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-top: 1px solid var(--line-soft);
  color: var(--ink-mute);
  font-size: 13px;
}
.footer-l { display: inline-flex; align-items: center; gap: 10px; }
.footer-r { display: inline-flex; gap: 18px; }
.footer-r a:hover { color: var(--ink); }
@media (max-width: 600px) {
  .footer { flex-direction: column; align-items: flex-start; }
}

/* ---------- TOAST ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 30px);
  background: #1d1d22;
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s ease, opacity 0.25s ease;
  z-index: 100;
}
.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- selection ---------- */
::selection {
  background: var(--accent);
  color: var(--bg);
}

/* ---------- reduce motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  html { scroll-behavior: auto; }
}

/* =========================================================
   BLOG / WRITING — reading view
   ========================================================= */

.blog-body { background: var(--bg); }

.reading {
  position: relative;
  z-index: 2;
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(56px, 9vw, 96px) var(--pad-x) 0;
}

/* ---- blog hero (index page) ---- */
.blog-hero { margin-bottom: clamp(40px, 7vw, 72px); }
.blog-h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
  max-width: 18ch;
}
.blog-lede {
  color: var(--ink-soft);
  font-size: clamp(16px, 1.5vw, 18px);
  max-width: 60ch;
  margin: 0 0 22px;
}
.blog-lede-link {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(244, 185, 66, 0.4);
  text-underline-offset: 3px;
}
.blog-lede-link:hover { text-decoration-color: var(--accent); }
.blog-meta-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  transition: background 0.15s, border-color 0.15s;
}
.chip:hover { background: rgba(244, 185, 66, 0.10); border-color: rgba(244, 185, 66, 0.4); color: var(--accent); }
.chip-mute {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--ink-mute);
}

/* ---- post list ---- */
.post-list-loading,
.post-list-empty {
  color: var(--ink-mute);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 32px 0;
}
.year-block { margin-bottom: clamp(40px, 6vw, 56px); }
.year-label {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0 0 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}
.post-items {
  list-style: none;
  padding: 0;
  margin: 0;
}
.post-item { border-bottom: 1px solid var(--line-soft); }
.post-item:last-child { border-bottom: 0; }

.post-link {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 24px;
  align-items: start;
  padding: 22px 4px;
  transition: background 0.15s ease, padding 0.15s ease;
  position: relative;
}
.post-link:hover {
  background: rgba(255,255,255,0.02);
  padding-left: 12px;
  padding-right: 12px;
}
.post-link:hover .post-link-arrow { transform: translateX(4px); color: var(--accent); }
.post-link:hover .post-link-title { color: var(--accent); }

.post-date {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  padding-top: 6px;
}
.post-link-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(22px, 2.4vw, 28px);
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin: 0 0 6px;
  color: var(--ink);
  transition: color 0.2s;
}
.post-link-desc {
  color: var(--ink-mute);
  font-size: 14.5px;
  margin: 0 0 10px;
  max-width: 56ch;
}
.post-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.post-tags.inline { display: inline-flex; }
.post-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
.post-source {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  vertical-align: middle;
  margin-left: 10px;
  padding: 3px 9px 3px 7px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  color: var(--ink-mute);
  transform: translateY(-2px);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.post-source-medium {
  color: #b6e3ff;
  border-color: rgba(182, 227, 255, 0.25);
  background: rgba(182, 227, 255, 0.06);
}
.post-source svg { color: currentColor; }
.post-item-external .post-link:hover .post-source { color: #fff; border-color: rgba(255,255,255,0.4); background: rgba(255,255,255,0.06); }
.post-link-arrow {
  color: var(--ink-mute);
  font-size: 20px;
  transition: transform 0.2s ease, color 0.2s ease;
  padding-top: 4px;
}
@media (max-width: 640px) {
  .post-link { grid-template-columns: 1fr auto; gap: 6px; padding: 18px 4px; }
  .post-date { grid-column: 1 / -1; padding-top: 0; }
  .post-link-arrow { display: none; }
}

/* ---- single post ---- */
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-mute);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  margin-bottom: 30px;
  transition: color 0.2s;
}
.post-back:hover { color: var(--accent); }

.post-head { margin-bottom: 36px; }
.post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-mute);
  margin-bottom: 18px;
}
.dot-sep { color: var(--ink-dim); }
.post-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(36px, 5.4vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
.post-description {
  color: var(--ink-soft);
  font-size: clamp(16px, 1.5vw, 19px);
  margin: 0;
  font-style: italic;
  font-family: var(--font-serif);
  max-width: 56ch;
}

/* ---- post body (Markdown output) ---- */
.post-body {
  font-family: var(--font-serif);
  font-size: clamp(18px, 1.55vw, 20px);
  line-height: 1.65;
  color: var(--ink-soft);
}
.post-body p { margin: 0 0 1.2em; }
.post-body p:first-of-type::first-letter {
  font-size: 1.0em;
  font-weight: 400;
}
.post-body h1, .post-body h2, .post-body h3, .post-body h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.post-body h1 { font-size: 1.9em; margin: 1.6em 0 0.4em; }
.post-body h2 {
  font-size: 1.45em;
  margin: 2em 0 0.4em;
  padding-top: 0.6em;
  border-top: 1px solid var(--line-soft);
}
.post-body h3 { font-size: 1.18em; margin: 1.6em 0 0.4em; color: var(--accent); font-style: italic; }
.post-body strong { color: var(--ink); font-weight: 600; }
.post-body em { color: var(--accent); font-style: italic; font-family: var(--font-serif); }
.post-body a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(244, 185, 66, 0.4);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.2s;
}
.post-body a:hover { text-decoration-color: var(--accent); }
.post-body ul, .post-body ol { margin: 0 0 1.2em; padding-left: 1.4em; }
.post-body li { margin-bottom: 0.4em; }
.post-body blockquote {
  margin: 1.6em 0;
  padding: 4px 0 4px 22px;
  border-left: 2px solid var(--accent);
  color: var(--ink-mute);
  font-style: italic;
}
.post-body code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 2px 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 4px;
  color: var(--accent-2);
}
.post-body pre {
  font-family: var(--font-mono);
  background: #16161b;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.55;
  margin: 1.6em 0;
}
.post-body pre code { background: none; padding: 0; color: var(--ink-soft); }
.post-body hr {
  border: 0;
  border-top: 1px solid var(--line-soft);
  margin: 2.4em auto;
  width: 60px;
  border-color: var(--accent);
}
.post-body img {
  border-radius: 12px;
  border: 1px solid var(--line);
  margin: 1.6em 0;
}
.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-family: var(--font-sans);
  font-size: 0.88em;
}
.post-body th, .post-body td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-soft);
}
.post-body th { color: var(--ink); font-weight: 600; }
.post-loading {
  color: var(--ink-mute);
  font-family: var(--font-mono);
  font-size: 13px;
}

/* ---- post nav (prev/next) ---- */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 64px;
  padding-top: 28px;
  border-top: 1px solid var(--line-soft);
}
.post-nav-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.post-nav-card:hover {
  border-color: rgba(244, 185, 66, 0.35);
  background: #17171c;
  transform: translateY(-1px);
}
.post-nav-card.right { text-align: right; }
.post-nav-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.post-nav-title {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--ink);
  line-height: 1.25;
}
@media (max-width: 600px) {
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-card.right { text-align: left; }
}

/* ---- responsive reading column ---- */
@media (max-width: 600px) {
  .reading { padding-top: 32px; }
  .post-title { font-size: 36px; }
}