:root {
  --paper: #e9e9e7;
  --paper-dark: #dedcda;
  --grey: #cfcdca;
  --grey-dark: #aaa8a4;
  --ink: #303030;
  --ink-light: #6a6a67;
  --accent: #7a7873;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'SF Mono', Menlo, Monaco, Consolas, monospace;
  line-height: 1.7em;
  min-height: 100vh;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 1.5em 5em;
}

/* Hero */
.hero-spacer {
  height: 100vh;
}

.hero {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2em;
  pointer-events: none;
  transition: opacity 0.15s linear;
  will-change: opacity;
}

.hero a {
  pointer-events: auto;
}

.hero-title {
  font-size: clamp(2em, 6vw, 3.2em);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ink);
}

.hero-subtitle {
  font-size: 0.9em;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin: 0.8em 0 0;
  color: var(--ink-light);
}

.scroll-arrow {
  margin-top: 2.5em;
  font-size: 1.8em;
  color: var(--ink-light);
  text-decoration: none;
  line-height: 1;
  animation: bounce 2.4s cubic-bezier(0.45, 0, 0.55, 1) infinite;
  transition: color 0.25s ease;
}

.scroll-arrow:hover {
  color: var(--ink);
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(10px); }
}

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Header (post page) */
header.site-header {
  padding: 2em 0 1em;
}

.site-title {
  font-family: inherit;
  font-weight: 700;
  font-size: 1.6em;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.25s ease;
}

.site-title:hover {
  color: var(--accent);
}

.entries {
  list-style: none;
  padding: 0;
  margin: 0;
}

.entry {
  padding: 1.2em 0;
  border-bottom: 1px solid var(--grey-dark);
}

.entry:first-child {
  padding-top: 0;
}

.entry-title {
  margin: 0 0 0.2em;
  font-size: 1.25em;
}

.entry-title a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.25s ease;
}

.entry-title a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.entry-meta {
  color: var(--ink-light);
  font-size: 0.85em;
  margin-bottom: 0.4em;
}

.entry-excerpt {
  color: var(--ink);
  margin: 0;
}

.empty-state {
  text-align: center;
  color: var(--ink-light);
  padding: 3em 1em;
  border: 1px dashed var(--grey-dark);
  background: var(--paper-dark);
}

/* Post view */
main#main {
  animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.post-title {
  font-size: 1.8em;
  margin: 0 0 0.2em;
}

.post-dek {
  font-size: 1.05em;
  color: var(--ink-light);
  margin: 0 0 1em;
  line-height: 1.5em;
}

.post-meta {
  color: var(--ink-light);
  font-size: 0.85em;
  margin-bottom: 1.8em;
}

.post-body {
  word-wrap: break-word;
}

.post-body p {
  margin: 0 0 1.3em;
}

.post-body h2 {
  margin: 2.2em 0 0.9em;
  padding-top: 1.4em;
  border-top: 1px solid var(--grey-dark);
  font-size: 0.95em;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}

.post-body h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.post-body h3 {
  margin: 1.8em 0 0.6em;
  font-size: 1.05em;
  font-weight: 700;
  color: var(--ink);
}

.post-body blockquote {
  margin: 1.6em 0;
  padding: 0.9em 1.3em;
  border-left: 3px solid var(--ink);
  background: var(--paper-dark);
  color: var(--ink);
  font-style: normal;
}

.post-body blockquote p {
  margin: 0;
}

.post-body figure {
  margin: 2.2em 0;
  padding: 1.4em;
  background: var(--paper-dark);
  border: 1px solid var(--grey-dark);
}

.post-body figure svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.post-body figure svg text {
  font-family: 'SF Mono', Menlo, Monaco, Consolas, monospace;
}

.post-body figcaption {
  margin-top: 1em;
  font-size: 0.8em;
  color: var(--ink-light);
  text-align: center;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 0.85em;
}

.post-body th,
.post-body td {
  text-align: left;
  padding: 0.5em 0.7em;
  border-bottom: 1px solid var(--grey-dark);
}

.post-body th {
  color: var(--ink-light);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85em;
  letter-spacing: 0.04em;
}

.post-body strong {
  font-weight: 700;
}

.post-body sup {
  font-size: 0.7em;
  line-height: 0;
}

.post-body sup a {
  color: var(--ink-light);
  text-decoration: none;
}

.post-body sup a:hover {
  text-decoration: underline;
}

/* Stat grid (quick facts box) */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  border: 1px solid var(--grey-dark);
  margin: 1.8em 0 2.2em;
}

.stat {
  padding: 0.9em 1.1em;
  border-right: 1px solid var(--grey-dark);
  border-bottom: 1px solid var(--grey-dark);
}

.stat-label {
  font-size: 0.68em;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 0.35em;
}

.stat-value {
  font-size: 0.85em;
  font-weight: 700;
  color: var(--ink);
}

/* Wall / progression cards */
.wall-track {
  display: flex;
  align-items: stretch;
  gap: 0.6em;
  margin: 2em 0;
  flex-wrap: wrap;
}

.wall-card {
  flex: 1 1 160px;
  border: 1px solid var(--grey-dark);
  padding: 1em 1.2em;
  background: var(--paper-dark);
}

.wall-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-light);
  font-size: 1.2em;
  flex: 0 0 auto;
  padding: 0 0.2em;
}

.wall-era {
  font-size: 0.68em;
  letter-spacing: 0.07em;
  color: var(--ink-light);
  text-transform: uppercase;
}

.wall-title {
  font-weight: 700;
  margin: 0.35em 0;
  font-size: 1.05em;
  color: var(--ink);
}

.wall-desc {
  font-size: 0.85em;
  color: var(--ink-light);
  margin: 0;
}

/* Two-track comparison cards */
.track-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4em;
  margin: 2em 0;
}

@media (max-width: 640px) {
  .track-grid {
    grid-template-columns: 1fr;
  }
}

.track-card {
  border: 1px solid var(--grey-dark);
  padding: 1.2em 1.3em;
}

.track-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6em;
}

.track-label {
  font-size: 0.72em;
  letter-spacing: 0.07em;
  color: var(--ink-light);
  text-transform: uppercase;
}

.track-status-badge {
  font-size: 0.68em;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.2em 0.6em;
  border: 1px solid var(--ink);
  text-transform: uppercase;
  color: var(--ink);
}

.track-title {
  font-size: 1.1em;
  font-weight: 700;
  margin: 0 0 0.5em;
  color: var(--ink);
}

.track-desc {
  font-size: 0.85em;
  color: var(--ink-light);
  margin: 0 0 1em;
}

.track-row {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 0.6em;
  font-size: 0.8em;
  padding: 0.55em 0;
  border-top: 1px solid var(--grey-dark);
  color: var(--ink);
}

.track-row-label {
  color: var(--ink-light);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Cost comparison box */
.cost-compare {
  display: flex;
  flex-wrap: wrap;
  border: 1px solid var(--grey-dark);
  margin: 2em 0;
}

.cost-box {
  flex: 1 1 200px;
  padding: 1.3em 1.3em;
}

.cost-box + .cost-box {
  border-left: 1px solid var(--grey-dark);
}

.cost-figure {
  font-size: 1.7em;
  font-weight: 700;
  margin: 0 0 0.3em;
  color: var(--ink);
}

.cost-label {
  font-size: 0.72em;
  letter-spacing: 0.04em;
  color: var(--ink-light);
  text-transform: uppercase;
}

/* Timeline */
.timeline-track {
  margin: 1.8em 0;
}

.timeline-track-label {
  font-size: 0.78em;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.9em;
  padding-bottom: 0.45em;
  border-bottom: 1px solid var(--grey-dark);
  color: var(--ink);
}

.timeline-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1em;
  margin-bottom: 1.6em;
}

@media (max-width: 640px) {
  .timeline-row {
    grid-template-columns: 1fr;
  }
}

.timeline-point {
  border-top: 2px solid var(--ink-light);
  padding-top: 0.6em;
}

.timeline-year {
  font-size: 0.75em;
  color: var(--ink-light);
  margin-bottom: 0.3em;
}

.timeline-desc {
  font-size: 0.85em;
  color: var(--ink);
}

/* Pull quote (distinct from sourced blockquotes) */
.pull-quote {
  font-style: italic;
  font-size: 1.15em;
  border-left: 3px solid var(--ink);
  padding: 0.2em 0 0.2em 1.3em;
  margin: 2.2em 0;
  color: var(--ink);
}

/* References */
.post-references {
  margin-top: 3em;
  padding-top: 1.6em;
  border-top: 1px solid var(--grey-dark);
  font-size: 0.8em;
  color: var(--ink-light);
}

.post-references h2 {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.post-references ol {
  padding-left: 1.4em;
  margin: 0;
}

.post-references li {
  margin-bottom: 0.8em;
}

.post-references a {
  color: var(--ink-light);
}

.post-footer-note {
  margin-top: 2.4em;
  font-size: 0.75em;
  color: var(--ink-light);
  font-style: italic;
}

.back-link {
  display: inline-block;
  margin-bottom: 1.5em;
  color: var(--ink-light);
  text-decoration: none;
  font-size: 0.9em;
  transition: color 0.25s ease;
}

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