*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0b0e12;
  --surface: #10151c;
  --surface-soft: #0d1218;
  --line: rgba(255, 255, 255, 0.09);
  --text: #edf2f7;
  --muted: #97a3b0;
  --shadow: 0 14px 30px rgba(0, 0, 0, 0.2);
  --radius-lg: 16px;
  --radius-md: 12px;
  --content-width: 1040px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

.site-header,
main,
.site-footer {
  width: min(calc(100% - 2rem), var(--content-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.8rem 0;
  background: rgba(11, 14, 18, 0.92);
  backdrop-filter: blur(8px);
}

.brand,
.site-nav a,
.card-meta,
.card-link,
.timeline-date,
.section-heading h2,
.entry-block h2,
.panel-label {
  font-family: "Space Grotesk", sans-serif;
}

.brand {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
}

.site-nav a {
  padding: 0.4rem 0.72rem;
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--muted);
  transition: background-color 140ms ease, color 140ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

main {
  padding: 1rem 0 3rem;
}

.intro-section,
.card,
.empty-card,
.timeline,
.site-footer,
.entry-hero,
.entry-sidebar,
.entry-block {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.intro-section,
.timeline,
.site-footer,
.entry-hero,
.entry-sidebar,
.entry-block {
  border-radius: var(--radius-lg);
}

.intro-section {
  padding: 0.95rem 1rem;
}

.intro-text {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.section {
  padding-top: 2rem;
}

.section-heading {
  margin-bottom: 0.75rem;
}

.section-heading h2 {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0.8rem;
}

.card,
.empty-card {
  grid-column: span 4;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  padding: 0.95rem;
  border-radius: var(--radius-md);
}

.card {
  transition: border-color 140ms ease, transform 140ms ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.16);
}

.card-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.status-badge,
.entry-status {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 0.18rem 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  color: var(--text);
  font-size: 0.72rem;
  line-height: 1.2;
}

.card-title {
  margin: 0.4rem 0 0;
  font-size: 0.98rem;
  line-height: 1.3;
}

.card-summary {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.card-details {
  margin: 0.7rem 0 0;
  padding-left: 1rem;
  font-size: 0.9rem;
}

.card-details li + li {
  margin-top: 0.3rem;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-size: 0.76rem;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: auto;
  padding-top: 0.85rem;
}

.card-year {
  color: var(--muted);
  font-size: 0.84rem;
}

.card-link {
  font-size: 0.8rem;
  font-weight: 700;
}

.card-link-muted {
  color: var(--muted);
}

.empty-card {
  justify-content: center;
  border-style: dashed;
  background: transparent;
}

.empty-card p {
  margin: 0;
  color: var(--muted);
}

.notes-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 0.8rem;
}

.compact-grid .card,
.compact-grid .empty-card {
  grid-column: span 12;
}

.timeline {
  margin: 0;
  padding: 0.95rem;
  list-style: none;
}

.timeline li + li {
  margin-top: 0.8rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

.timeline-date {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-title {
  margin: 0;
  font-size: 0.94rem;
}

.timeline-summary {
  margin: 0.4rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  margin-bottom: 2rem;
  padding: 0.9rem 1rem;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.entry-page {
  padding-top: 1rem;
}

.entry-hero {
  padding: 1rem 1.1rem;
}

.entry-hero h1 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.18rem;
  line-height: 1.2;
}

.entry-intro {
  max-width: 46rem;
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.entry-status {
  margin-top: 0.55rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.9rem;
}

.action-link {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 0.82rem;
  transition: background-color 140ms ease, color 140ms ease;
}

.action-link:hover,
.action-link:focus-visible {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.entry-section {
  padding-top: 0.8rem;
}

.entry-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 0.8rem;
  align-items: start;
}

.entry-sidebar {
  position: sticky;
  top: 4.8rem;
  padding: 0.95rem;
}

.panel-label {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.entry-highlights,
.entry-list {
  margin: 0;
  padding-left: 1rem;
  font-size: 0.92rem;
}

.entry-highlights li + li,
.entry-list li + li {
  margin-top: 0.35rem;
}

.entry-link {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.entry-content {
  display: grid;
  gap: 0.8rem;
}

.entry-block {
  padding: 1rem;
}

.entry-block h2 {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.entry-block p {
  margin: 0.7rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 320ms ease, transform 320ms ease;
}

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

@media (max-width: 980px) {
  .notes-layout,
  .entry-grid {
    grid-template-columns: 1fr;
  }

  .entry-sidebar {
    position: static;
  }

  .card,
  .empty-card {
    grid-column: span 6;
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
  }

  .card,
  .empty-card {
    grid-column: span 12;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}