:root {
  --bg: #efefea;
  --paper: #f7f7f4;
  --ink: #131311;
  --ink-soft: #3d3d38;
  --ink-mid: #6e6e66;
  --ink-low: #9a9a90;
  --signal: #2b4bf2;
  --blush: #e879b9;
  --line: rgba(19, 19, 17, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Archivo', system-ui, sans-serif;
  overflow-x: hidden;
}

/* grain, same as main site */
body::after {
  content: '';
  position: fixed;
  inset: -50%;
  width: 200%;
  height: 200%;
  pointer-events: none;
  z-index: 60;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* aurora backdrop */
.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.aurora span {
  position: absolute;
  display: block;
  border-radius: 9999px;
  filter: blur(90px);
  will-change: transform;
}
.aurora span:nth-child(1) {
  top: -12%;
  left: -8%;
  width: 44vw;
  height: 44vw;
  background: radial-gradient(circle, rgba(43, 75, 242, 0.15), transparent 65%);
  animation: drift-a 26s ease-in-out infinite alternate;
}
.aurora span:nth-child(2) {
  top: 30%;
  right: -14%;
  width: 38vw;
  height: 38vw;
  background: radial-gradient(circle, rgba(232, 121, 185, 0.12), transparent 65%);
  animation: drift-b 32s ease-in-out infinite alternate;
}
.aurora span:nth-child(3) {
  bottom: -18%;
  left: 18%;
  width: 46vw;
  height: 46vw;
  background: radial-gradient(circle, rgba(126, 224, 210, 0.12), transparent 65%);
  animation: drift-c 38s ease-in-out infinite alternate;
}
@keyframes drift-a {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(9vw, 7vh) scale(1.12); }
  100% { transform: translate(-4vw, 12vh) scale(0.95); }
}
@keyframes drift-b {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-8vw, 10vh) scale(1.08); }
  100% { transform: translate(5vw, -6vh) scale(1.15); }
}
@keyframes drift-c {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(7vw, -8vh) scale(1.1); }
  100% { transform: translate(-6vw, -4vh) scale(0.96); }
}

::selection {
  background: var(--signal);
  color: #efefea;
}

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

/* glass primitives */
.glass {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.72) 0%, rgba(255, 255, 255, 0.38) 100%);
  -webkit-backdrop-filter: blur(20px) saturate(170%);
  backdrop-filter: blur(20px) saturate(170%);
  border: 1px solid rgba(255, 255, 255, 0.62);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.75),
    0 8px 32px rgba(19, 19, 17, 0.07);
}

.glass-chip {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.45) 100%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.65);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 4px 16px rgba(19, 19, 17, 0.06);
}

/* nav: floating glass pill, like the main site */
.site-nav {
  position: fixed;
  top: 14px;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 22px;
  height: 56px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.86) 0%, rgba(255, 255, 255, 0.55) 100%);
  -webkit-backdrop-filter: blur(28px) saturate(200%);
  backdrop-filter: blur(28px) saturate(200%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.85),
    0 12px 40px rgba(19, 19, 17, 0.1);
}

.brand {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.brand em {
  font-style: normal;
  color: var(--signal);
}

.back-link {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mid);
  text-decoration: none;
  transition: color 0.3s;
}

.back-link:hover {
  color: var(--signal);
}

/* layout */
.page {
  position: relative;
  z-index: 1;
}

.post {
  max-width: 760px;
  margin: 0 auto;
  padding: 108px 20px 80px;
}

/* hero card */
.post-hero {
  position: relative;
  overflow: hidden;
  border-radius: 28px;
  padding: 34px 34px 0;
  margin-bottom: 36px;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.chip {
  display: inline-flex;
  align-items: center;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 6px 12px;
  border-radius: 999px;
}

.chip.accent {
  color: var(--signal);
}

.post-hero h1 {
  font-size: clamp(30px, 5.2vw, 44px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--ink);
  margin: 22px 0 0;
  max-width: 18ch;
}

.post-hero .ridge {
  display: block;
  width: 100%;
  height: 170px;
  margin-top: 26px;
}

/* body */
.post-body {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.post-body h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 44px 0 12px;
  scroll-margin-top: 96px;
}

.post-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 32px 0 10px;
}

.post-body p {
  margin: 16px 0;
}

.post-body strong {
  color: var(--ink);
  font-weight: 600;
}

.post-body a {
  color: var(--signal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-body ul,
.post-body ol {
  margin: 16px 0;
  padding-left: 8px;
  list-style: none;
}

.post-body li {
  margin: 10px 0;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.post-body li > span:first-child {
  flex-shrink: 0;
  margin-top: 2px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--signal);
}

.post-body code {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 13px;
  background: rgba(19, 19, 17, 0.06);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 6px;
  color: var(--ink);
}

.post-body pre {
  background: #131311;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 22px 0;
  box-shadow: 0 16px 40px -16px rgba(19, 19, 17, 0.4);
}

.post-body pre code {
  background: transparent;
  border: none;
  padding: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: #d8d8d0;
}

.post-body blockquote {
  margin: 22px 0;
  padding-left: 20px;
  border-left: 2px solid var(--signal);
  color: var(--ink);
}

.post-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 22px 0;
  font-size: 13.5px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: 14px;
  overflow: hidden;
}

.post-body th,
.post-body td {
  border-bottom: 1px solid var(--line);
  padding: 11px 16px;
  text-align: left;
}

.post-body tr:last-child td {
  border-bottom: none;
}

.post-body th {
  color: var(--ink);
  font-weight: 600;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.55);
}

/* card grids inside articles */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 22px 0;
}

.glass-card {
  border-radius: 18px;
  padding: 18px 20px;
}

.glass-card .card-title {
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.glass-card p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-mid);
}

/* stat row */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 22px 0;
}

.stat {
  border-radius: 18px;
  padding: 20px;
  text-align: left;
}

.stat .stat-value {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.stat .stat-label {
  margin-top: 4px;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mid);
}

/* end of article */
.post-end {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-low);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.post-end a {
  color: var(--ink-mid);
  text-decoration: none;
  transition: color 0.3s;
}

.post-end a:hover {
  color: var(--signal);
}

/* more field notes */
.more-posts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}

.more-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-radius: 20px;
  padding: 20px 22px;
  text-decoration: none;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.more-card:hover {
  transform: translateY(-4px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 24px 48px -12px rgba(19, 19, 17, 0.18);
}

.more-card .chip {
  align-self: flex-start;
}

.more-card strong {
  font-size: 15.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.35;
}

.more-card:hover strong {
  color: var(--signal);
}

.more-card .more-meta {
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-low);
}

.more-heading {
  margin: 56px 0 0;
  font-family: 'Geist Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-low);
}

@media (max-width: 640px) {
  .post {
    padding: 96px 16px 64px;
  }

  .post-hero {
    padding: 24px 22px 0;
    border-radius: 22px;
  }

  .more-posts {
    grid-template-columns: 1fr;
  }
}

@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;
  }

  .aurora {
    display: none;
  }
}