:root {
  color-scheme: light;
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --color-page: #fafafc;
  --color-surface: #ffffff;
  --color-plate: #ebecf4;
  --color-plate-soft: #f3f3f8;
  --color-rule: #e2e3ea;
  --color-ink: #16181f;
  --color-ink-soft: #3b3e49;
  --color-muted: #6b6f7b;
  --page-width: 960px;
  --page-gutter: clamp(16px, 4vw, 40px);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --color-page: #0d0e13;
  --color-surface: #15171f;
  --color-plate: #20232d;
  --color-plate-soft: #171922;
  --color-rule: #232530;
  --color-ink: #ecedf3;
  --color-ink-soft: #c5c7d1;
  --color-muted: #858997;
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--color-page);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--color-ink);
  color: var(--color-page);
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: min(100% - (var(--page-gutter) * 2), var(--page-width));
  margin-inline: auto;
}

.topbar {
  height: 64px;
  display: flex;
  align-items: center;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  transition: opacity 0.15s ease;
}

.brand:hover {
  opacity: 0.7;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.date-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
  transition: color 0.15s ease;
  padding: 4px 2px;
}

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

.date-label-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  color: var(--color-ink);
  font-weight: 500;
  padding: 2px 6px;
  border-radius: 6px;
  transition: background-color 0.15s ease;
}

.date-label-wrap:hover {
  background: var(--color-plate-soft);
}

.sr-date-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  color: var(--color-muted);
  transition: color 0.15s ease, background-color 0.15s ease, transform 0.12s ease;
}

.theme-toggle:hover {
  color: var(--color-ink);
  background: var(--color-plate-soft);
}

.theme-toggle:active {
  transform: scale(0.95);
}

.theme-toggle svg {
  position: absolute;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.icon-sun {
  opacity: 0;
  transform: scale(0.6) rotate(-45deg);
}

.icon-moon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

:root[data-theme="dark"] .icon-sun {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

:root[data-theme="dark"] .icon-moon {
  opacity: 0;
  transform: scale(0.6) rotate(45deg);
}

.main-content {
  flex: 1;
  padding-top: clamp(40px, 7vw, 84px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.hero {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(36px, 5vw, 56px);
}

.hero-title {
  margin: 0;
  font-size: clamp(32px, 4.2vw, 48px);
  font-weight: 500;
  letter-spacing: -0.028em;
  line-height: 1.08;
  color: var(--color-ink);
}

.hero-lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.55;
  color: var(--color-muted);
}

.list-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
}

.filter-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.filter-btn {
  font-size: 13px;
  color: var(--color-muted);
  transition: color 0.15s ease;
}

.filter-btn:hover {
  color: var(--color-ink-soft);
}

.filter-btn.active {
  color: var(--color-ink);
  font-weight: 500;
}

.list-count {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--color-muted);
}

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

.directory-item {
  position: relative;
  border-top: 1px solid var(--color-rule);
}

.directory-item:last-child {
  border-bottom: 1px solid var(--color-rule);
}

.directory-item::before {
  content: "";
  position: absolute;
  inset: 4px -16px;
  border-radius: 12px;
  background: var(--color-plate-soft);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.directory-item:hover::before {
  opacity: 1;
}

.directory-row {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 36px 68px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
}

.row-idx {
  position: relative;
  display: inline-grid;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--color-muted);
}

.row-idx-num,
.row-idx-arrow {
  grid-area: 1 / 1;
  transition: opacity 0.2s ease-out, filter 0.2s ease-out;
}

.row-idx-num {
  opacity: 1;
  filter: blur(0px);
}

.row-idx-arrow {
  opacity: 0;
  filter: blur(3px);
  color: var(--color-ink);
}

.directory-row:hover .row-idx-num {
  opacity: 0;
  filter: blur(3px);
}

.directory-row:hover .row-idx-arrow {
  opacity: 1;
  filter: blur(0px);
}

.row-year {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
}

.row-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
  color: var(--color-ink-soft);
}

.row-subject {
  color: var(--color-ink);
  font-weight: 500;
}

.row-delta {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--color-muted);
  white-space: nowrap;
}

.footer-band {
  margin-top: auto;
  padding-top: 24px;
  overflow: hidden;
}

.footer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  padding-bottom: 12px;
}

.wordmark {
  font-size: clamp(72px, 16vw, 176px);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 0.82;
  color: var(--color-plate);
  user-select: none;
  margin-bottom: -0.08em;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}

@media (max-width: 640px) {
  .directory-item::before {
    inset: 4px -8px;
  }

  .directory-row {
    grid-template-columns: 28px 54px minmax(0, 1fr);
    gap: 10px;
    padding: 15px 0;
  }

  .row-delta {
    display: none;
  }
}