/* ─────────────────────────────────────────────────────────────────
   Alternate Tomorrows — base styles
   text-first, minimal, paper-and-screen friendly
   ───────────────────────────────────────────────────────────────── */

:root {
  /* Dark (default) — Substack-style neutral near-black */
  --bg: #181818;
  --bg-elev: #1f1f1f;
  --ink: #ece8dc;
  --ink-soft: #b6b1a3;
  --ink-mute: #7a7770;
  --ink-faint: #4a4842;
  --rule: #2c2c2a;
  --rule-soft: #232322;
  --accent: #a8b5ff;
  --accent-ink: #0f0f0d;

  /* tokens */
  --col-reading: 72ch;
  --col-wide: 1280px;
  --gutter: clamp(20px, 4vw, 64px);

  --fs-base: 16px;
  --fs-meta: 11px;
  /* labels, dates */
  --fs-body: 15px;
  --fs-row: 24px;
  /* row titles */
  --fs-display: clamp(48px, 8vw, 96px);
  --fs-page: clamp(40px, 6vw, 72px);

  --lh-body: 1.65;
  --lh-tight: 1.05;

  --ease: cubic-bezier(.2, .6, .2, 1);
}

:root[data-theme="light"] {
  --bg: #f3eee2;
  --bg-elev: #ebe5d4;
  --ink: #1a1815;
  --ink-soft: #3a3832;
  --ink-mute: #6e6a60;
  --ink-faint: #a8a293;
  --rule: #cfc8b6;
  --rule-soft: #ded7c3;
  --accent-ink: #f3eee2;
}

* {
  box-sizing: border-box;
}

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

html {
  background: var(--bg);
  color: var(--ink);
  font-family: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  font-feature-settings: "ss01", "ss02";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  transition: background-color 320ms var(--ease), color 320ms var(--ease);
}

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

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

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

/* ─── Type utility classes ─────────────────────────────────────── */
.t-display,
.t-title {
  font-family: "Oswald", "Archivo Narrow", "Barlow Condensed", sans-serif;
  font-weight: 500;
  letter-spacing: 0.005em;
  line-height: var(--lh-tight);
  text-transform: none;
}

.t-display {
  font-size: var(--fs-display);
}

.t-row {
  font-size: var(--fs-row);
}

.t-label {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: var(--fs-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.t-body {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: var(--fs-body);
}

.t-num {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: var(--fs-meta);
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  font-variant-numeric: tabular-nums;
}

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

.muted {
  color: var(--ink-mute);
}

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

.faint {
  color: var(--ink-faint);
}

/* ─── Page shell ───────────────────────────────────────────────── */
.shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 28px var(--gutter) 24px;
  background: linear-gradient(to bottom, var(--bg) 70%, transparent);
  backdrop-filter: blur(6px);
  transition: transform 360ms var(--ease), opacity 360ms var(--ease);
}

.topbar.is-hidden {
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
}

.logo {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.22em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--ink);
}

.logo span {
  display: block;
}

.nav {
  display: flex;
  gap: 36px;
  align-items: center;
}

.nav a {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
  transition: color 200ms var(--ease);
  position: relative;
}

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

.nav a.is-active {
  color: var(--ink);
}

.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -8px;
  height: 1px;
  background: var(--accent);
}

.nav .dots {
  display: flex;
  gap: 3px;
  color: var(--ink-mute);
}

.theme-btn {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  border: 1px solid var(--rule);
  border-radius: 20px;
  padding: 3px 10px;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
  cursor: pointer;
  background: none;
  font-family: "JetBrains Mono", monospace;
}

.theme-btn:hover {
  color: var(--ink);
  border-color: var(--ink-mute);
}

.footer {
  margin-top: auto;
  padding: 48px var(--gutter) 32px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  border-top: 1px solid var(--rule-soft);
  color: var(--ink-mute);
  font-size: var(--fs-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  transition: color 200ms;
}

.footer-links a:hover {
  color: var(--accent);
}

/* ─── Page header (used by layouts) ────────────────────────────── */
.page-head {
  padding: 56px var(--gutter) 32px;
}

.page-head__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  margin-bottom: 24px;
}

.page-head h1 {
  margin: 0;
  font-family: "Oswald", sans-serif;
  font-weight: 500;
  font-size: var(--fs-page);
  line-height: 0.95;
  letter-spacing: 0.005em;
}

.page-head .slash {
  color: var(--ink-faint);
  font-family: "Oswald", sans-serif;
  font-size: 32px;
  line-height: 1;
}

.page-head__sub {
  max-width: 56ch;
  color: var(--ink-soft);
  font-size: var(--fs-body);
  line-height: 1.55;
}

/* ─── Filter bar ──────────────────────────────────────────────── */
.filterbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  padding: 16px var(--gutter);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-size: var(--fs-meta);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.filterbar__group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
  flex: 1;
}

.filterbar__group button {
  color: var(--ink-mute);
  letter-spacing: inherit;
  transition: color 200ms;
  padding: 2px 0;
  white-space: nowrap;
}

.filterbar__group button:hover,
.filterbar__group button[aria-pressed="true"] {
  color: var(--ink);
}

.filterbar__group button[aria-pressed="true"] .pill-dot {
  background: var(--accent);
}

.pill-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-faint);
  margin-right: 8px;
  vertical-align: middle;
  transition: background-color 200ms;
}

.filterbar__count {
  color: var(--ink-mute);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  padding-top: 2px;
}

/* Mobile: horizontal scroll with fade — easier on small screens than wrap */
@media (max-width: 700px) {
  .filterbar {
    flex-direction: column;
    align-items: stretch;
    padding: 14px 0;
    gap: 10px;
  }

  .filterbar__group {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 4px var(--gutter);
    scrollbar-width: none;
    -webkit-mask-image: linear-gradient(to right, transparent, #000 12px, #000 calc(100% - 12px), transparent);
    mask-image: linear-gradient(to right, transparent, #000 12px, #000 calc(100% - 12px), transparent);
  }

  .filterbar__group::-webkit-scrollbar {
    display: none;
  }

  .filterbar__count {
    padding: 0 var(--gutter);
  }
}

/* ─── INDEX LAYOUT — rows ─────────────────────────────────────── */
.index-list {
  padding: 8px var(--gutter) 64px;
}

.index-row {
  display: grid;
  grid-template-columns: 90px minmax(260px, 1.2fr) 24px minmax(220px, 1.4fr) 120px;
  gap: 32px;
  align-items: center;
  padding: 28px 0;
  border-bottom: 1px solid var(--rule-soft);
  transition: padding 280ms var(--ease);
  position: relative;
}

.index-row:last-child {
  border-bottom: 0;
}

.index-row__num {
  color: var(--ink-mute);
  font-size: var(--fs-meta);
  letter-spacing: 0.1em;
  font-variant-numeric: tabular-nums;
}

.index-row__title {
  font-family: "Oswald", sans-serif;
  font-weight: 500;
  font-size: var(--fs-row);
  line-height: 1.1;
  letter-spacing: 0.005em;
  transition: color 200ms;
}

.index-row__slash {
  color: var(--ink-faint);
  font-family: "Oswald", sans-serif;
  font-size: 22px;
}

.index-row__premise {
  color: var(--ink-soft);
  font-size: var(--fs-body);
  line-height: 1.5;
}

.index-row__date {
  color: var(--ink-mute);
  font-size: var(--fs-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.index-row:hover .index-row__title {
  color: var(--accent);
}

.index-row:hover .index-row__slash {
  color: var(--accent);
}

.index-row::before {
  content: "";
  position: absolute;
  left: calc(var(--gutter) * -1 + 8px);
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 320ms var(--ease);
}

.index-row:hover::before {
  width: var(--gutter);
}

@media (max-width: 900px) {
  .index-row {
    grid-template-columns: 60px 1fr;
    grid-template-rows: auto auto auto;
    gap: 4px 16px;
    padding: 24px 0;
  }

  .index-row__num {
    grid-row: 1;
    grid-column: 1;
    align-self: start;
    padding-top: 6px;
  }

  .index-row__title {
    grid-row: 1;
    grid-column: 2;
  }

  .index-row__slash {
    display: none;
  }

  .index-row__premise {
    grid-row: 2;
    grid-column: 2;
    margin-top: 6px;
  }

  .index-row__date {
    grid-row: 3;
    grid-column: 2;
    text-align: left;
    margin-top: 8px;
  }
}

/* ─── MANUSCRIPT LAYOUT ───────────────────────────────────────── */
.ms-wrap {
  padding: 24px var(--gutter) 96px;
  max-width: var(--col-wide);
  margin: 0 auto;
  width: 100%;
}

.ms-item {
  display: grid;
  grid-template-columns: 80px 1fr 120px;
  gap: 40px;
  align-items: baseline;
  padding: 56px 0;
  border-bottom: 1px solid var(--rule-soft);
  cursor: pointer;
}

.ms-item:last-child {
  border-bottom: 0;
}

.ms-item__num {
  color: var(--ink-mute);
  font-size: var(--fs-meta);
  letter-spacing: 0.1em;
  font-variant-numeric: tabular-nums;
  align-self: start;
  padding-top: 18px;
}

.ms-item__title {
  font-family: "Oswald", sans-serif;
  font-weight: 500;
  font-size: clamp(38px, 5.6vw, 72px);
  line-height: 0.96;
  letter-spacing: 0.003em;
  margin: 0 0 18px;
  transition: color 280ms var(--ease);
}

.ms-item__premise {
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.55;
  max-width: 48ch;
}

.ms-item__date {
  color: var(--ink-mute);
  font-size: var(--fs-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: right;
  font-variant-numeric: tabular-nums;
  align-self: start;
  padding-top: 26px;
}

.ms-item:hover .ms-item__title {
  color: var(--accent);
}

@media (max-width: 900px) {
  .ms-item {
    grid-template-columns: 60px 1fr;
    gap: 16px;
  }

  .ms-item__date {
    grid-column: 2;
    text-align: left;
    padding-top: 0;
    margin-top: 12px;
  }
}

/* ─── LEDGER LAYOUT ───────────────────────────────────────────── */
.ledger {
  padding: 24px var(--gutter) 96px;
  max-width: var(--col-wide);
  margin: 0 auto;
  width: 100%;
}

.ledger__col {
  min-width: 0;
}

.ledger__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin: 0 0 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

.ledger__head h2 {
  margin: 0;
  font-family: "Oswald", sans-serif;
  font-weight: 500;
  font-size: 32px;
  line-height: 1;
}

.ledger__head h2 .slash {
  color: var(--ink-faint);
  margin-left: 8px;
  font-size: 22px;
}

.ledger__head .t-label {
  font-size: 10px;
  font-variant-numeric: tabular-nums;
}

.ledger-row {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  column-gap: 20px;
  row-gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule-soft);
  align-items: baseline;
}

.ledger-row:last-child {
  border-bottom: 0;
}

.ledger-row__num {
  color: var(--ink-mute);
  font-size: var(--fs-meta);
  letter-spacing: 0.1em;
  font-variant-numeric: tabular-nums;
  grid-row: 1;
}

.ledger-row__title {
  font-family: "Oswald", sans-serif;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.005em;
  line-height: 1.15;
  transition: color 200ms;
  grid-row: 1;
  grid-column: 2;
}

.ledger-row__date {
  color: var(--ink-mute);
  font-size: var(--fs-meta);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  grid-row: 1;
  grid-column: 3;
}

.ledger-row__premise {
  display: block;
  color: var(--ink-soft);
  font-size: 13.5px;
  line-height: 1.55;
  margin-top: 2px;
  grid-row: 2;
  grid-column: 2 / -1;
  max-width: 56ch;
  text-wrap: pretty;
}

.ledger-row__tags {
  grid-row: 3;
  grid-column: 2 / -1;
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 12px;
}

.ledger-row__tags::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 1px;
  background: var(--ink-faint);
  margin-right: 0;
  flex: 0 0 18px;
  opacity: 0.7;
}

.ledger-row__tag {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  background: none;
  border: 0;
  padding: 0;
  text-align: left;
  cursor: pointer;
  transition: color 200ms;
  font-family: "JetBrains Mono", monospace;
}

.ledger-row__tag:hover {
  color: var(--accent);
}

.ledger-row__tag.is-on {
  color: var(--accent);
}

.ledger-row__tag-sep {
  color: var(--ink-faint);
  font-size: 10px;
  user-select: none;
}

.ledger-row:hover .ledger-row__title {
  color: var(--accent);
}

/* Mobile refinements: tighter rhythm, hide redundant separators */
@media (max-width: 700px) {
  .ledger {
    padding: 16px var(--gutter) 64px;
  }

  .ledger-row {
    grid-template-columns: 40px 1fr;
    row-gap: 4px;
  }

  .ledger-row__date {
    grid-row: auto;
    grid-column: 2 / -1;
    text-align: left;
    color: var(--ink-faint);
    margin-top: 6px;
    font-size: 10px;
  }

  .ledger-row__title {
    font-size: 20px;
  }

  .ledger-row__tags {
    margin-top: 6px;
  }

  .ledger__head h2 {
    font-size: 26px;
  }

  .ledger__head h2 .slash {
    font-size: 18px;
  }
}

/* ─── STREAM LAYOUT ───────────────────────────────────────────── */
.stream {
  padding: 24px var(--gutter) 96px;
  max-width: 920px;
  margin: 0 auto;
  width: 100%;
}

.stream-year {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 40px;
  padding: 40px 0 0;
}

.stream-year__label {
  color: var(--accent);
  font-size: var(--fs-meta);
  letter-spacing: 0.22em;
  font-variant-numeric: tabular-nums;
  padding-top: 8px;
  position: sticky;
  top: 80px;
  align-self: start;
}

.stream-year__content {
  display: flex;
  flex-direction: column;
}

.stream-item {
  padding: 32px 0;
  border-top: 1px solid var(--rule-soft);
  position: relative;
}

.stream-item:hover .stream-item__title {
  color: var(--accent);
}

.stream-item__meta {
  display: flex;
  gap: 18px;
  color: var(--ink-mute);
  font-size: var(--fs-meta);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 14px;
  font-variant-numeric: tabular-nums;
}

.stream-item__title {
  font-family: "Oswald", sans-serif;
  font-weight: 500;
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1;
  letter-spacing: 0.003em;
  margin: 0 0 14px;
  transition: color 280ms var(--ease);
}

.stream-item__premise {
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.55;
  max-width: 56ch;
}

.stream-item__bullet {
  position: absolute;
  left: -22px;
  top: 44px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--ink-faint);
  background: var(--bg);
  border-radius: 50%;
}

.stream-item:hover .stream-item__bullet {
  background: var(--accent);
  border-color: var(--accent);
}

@media (max-width: 700px) {
  .stream-year {
    grid-template-columns: 60px 1fr;
    gap: 16px;
  }

  .stream-year__label {
    position: static;
  }
}

/* ─── Quiet entry animations ──────────────────────────────────── */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.enter {
  animation: fadeUp 600ms var(--ease) both;
}

.enter[data-i="0"] {
  animation-delay: 0ms;
}

.enter[data-i="1"] {
  animation-delay: 40ms;
}

.enter[data-i="2"] {
  animation-delay: 80ms;
}

.enter[data-i="3"] {
  animation-delay: 120ms;
}

.enter[data-i="4"] {
  animation-delay: 160ms;
}

.enter[data-i="5"] {
  animation-delay: 200ms;
}

.enter[data-i="6"] {
  animation-delay: 240ms;
}

.enter[data-i="7"] {
  animation-delay: 280ms;
}

.enter[data-i="8"] {
  animation-delay: 320ms;
}

.enter[data-i="9"] {
  animation-delay: 360ms;
}

.enter[data-i="10"] {
  animation-delay: 400ms;
}

.enter[data-i="11"] {
  animation-delay: 440ms;
}