:root {
  color-scheme: light;
  --bg: #ebe4d8;
  --ink: #1c1915;
  --muted: #4e483f;
  --line: #d5cbbd;
  --card: #fffdf9;
  --soft: #f6f1e8;
  --accent: #b64a24;
  --accent-ink: #fff8f4;
  --shadow: 0 1px 0 rgba(40, 28, 16, 0.04), 0 14px 30px rgba(40, 28, 16, 0.07);
  --s1: #7d756b;
  --s2: #1f6484;
  --s3: #c4622a;
  --s4: #247248;
  --sans: "Avenir Next", "Segoe UI", "Adwaita Sans", "Liberation Sans", "Nimbus Sans", sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Liberation Serif", "Nimbus Roman", Georgia, serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #12110f;
  --ink: #f4efe6;
  --muted: #c9bfb2;
  --line: #3a342c;
  --card: #221f1b;
  --soft: #1a1815;
  --accent: #e38a62;
  --accent-ink: #1c100c;
  --shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
  --s1: #c4baae;
  --s2: #8ec3de;
  --s3: #e38a62;
  --s4: #8fbfa8;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #12110f;
    --ink: #f4efe6;
    --muted: #c9bfb2;
    --line: #3a342c;
    --card: #221f1b;
    --soft: #1a1815;
    --accent: #e38a62;
    --accent-ink: #1c100c;
    --shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
    --s1: #c4baae;
    --s2: #8ec3de;
    --s3: #e38a62;
    --s4: #8fbfa8;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  padding: 22px clamp(12px, 3vw, 28px) 40px;
  background:
    radial-gradient(1100px 420px at 8% -10%, color-mix(in srgb, var(--s3) 22%, transparent), transparent 55%),
    radial-gradient(900px 380px at 100% 0%, color-mix(in srgb, var(--s2) 18%, transparent), transparent 50%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.45;
}

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

button, .file {
  min-height: 40px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 0 14px;
  cursor: pointer;
  touch-action: manipulation;
}

button:hover, .file:hover { border-color: color-mix(in srgb, var(--ink) 35%, var(--line)); }

.composer button,
#undo-btn {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: transparent;
  font-weight: 650;
}

button:disabled { opacity: 0.38; cursor: not-allowed; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--ink);
  color: var(--bg);
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 5;
}

.skip:focus { top: 12px; }

.top, .composer, .status, .help, .banner { width: 100%; }

.top {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

.title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
}

.mark {
  margin: 0 0 4px;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.1rem, 4vw, 3.3rem);
  font-weight: 560;
  letter-spacing: -0.03em;
  line-height: 0.95;
}

h1 em { font-style: italic; font-weight: 500; }

.lede { margin: 0; max-width: 42rem; color: var(--muted); }

.tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  align-items: center;
}

.tally {
  margin: 0 6px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.file { position: relative; display: inline-flex; align-items: center; }

.file input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.composer {
  display: grid;
  grid-template-columns: 1fr 180px auto;
  gap: 10px;
  align-items: end;
  padding: 12px;
  background: color-mix(in srgb, var(--card) 88%, transparent);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.composer label, .stack {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.composer input, .composer select, .card input, .card textarea, .stack input, .col-head input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: 12px;
  padding: 10px 12px;
  text-transform: none;
  letter-spacing: 0;
  font-size: 1rem;
  color: var(--ink);
}

.composer button { padding-inline: 18px; }

.status, .help { min-height: 1.3em; margin: 10px auto 0; color: var(--muted); font-size: 0.92rem; }

.help { margin-top: 2px; margin-bottom: 14px; }

.banner {
  margin-bottom: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--s3) 16%, var(--card));
  border: 1px solid color-mix(in srgb, var(--s3) 45%, var(--line));
}

.banner button { margin-left: 8px; }

.board {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px 20px;
  scroll-snap-type: x mandatory;
  scroll-padding-inline: 2px;
}

.column {
  flex: 1 1 236px;
  min-width: 236px;
  max-width: 320px;
  min-height: 240px;
}

.adder {
  flex: 0 0 96px;
  min-width: 96px;
  max-width: 96px;
  min-height: 240px;
}

.column {
  --stripe: var(--s1);
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  background: color-mix(in srgb, var(--soft) 92%, transparent);
  border: 1px solid var(--line);
  border-top: 3px solid var(--stripe);
  border-radius: 16px;
}

.column:nth-child(4n + 2) { --stripe: var(--s2); }
.column:nth-child(4n + 3) { --stripe: var(--s3); }
.column:nth-child(4n + 4) { --stripe: var(--s4); }

.column.drop { outline: 2px solid var(--accent); outline-offset: 2px; }

.col-head { display: flex; justify-content: space-between; gap: 8px; align-items: flex-start; }

.col-head h2 {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.col-name { overflow-wrap: anywhere; }

.count {
  color: var(--muted);
  letter-spacing: 0;
  font-size: 0.85rem;
  text-transform: none;
}

.col-actions, .card-actions { display: flex; gap: 4px; align-items: center; }

.card-actions { flex-wrap: nowrap; justify-content: space-between; }

.move {
  display: grid;
  grid-template-columns: repeat(4, 28px);
  gap: 2px;
}

.col-actions button, .card-actions button, .icon {
  min-height: 28px;
  min-width: 28px;
  padding: 0 6px;
  border-radius: 9px;
  background: transparent;
  font-size: 0.78rem;
}

.cards { display: flex; flex-direction: column; gap: 8px; min-height: 88px; }

.filter {
  display: block;
  width: min(320px, 100%);
  margin: 0 0 12px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 8px 14px;
}

.card {
  margin: 0;
  padding: 10px 10px 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  cursor: grab;
  transition: border-color 120ms ease;
}

.card:hover { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }

.card:active { cursor: grabbing; }

.card.dragging { opacity: 0.45; }

.card.insert-before { box-shadow: 0 -3px 0 var(--accent); }
.card.insert-after { box-shadow: 0 3px 0 var(--accent); }

.card h3 { margin: 0 0 6px; font-size: 1rem; font-weight: 650; line-height: 1.3; overflow-wrap: anywhere; }

.note {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.92rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.meta { margin: 0 0 8px; color: var(--muted); font-size: 0.75rem; }

.card textarea { min-height: 72px; resize: vertical; }

.edit-actions, .row { display: flex; gap: 6px; margin-top: 8px; }

.empty {
  margin: 0;
  padding: 18px 10px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  border: 1px dashed var(--line);
  border-radius: 12px;
}

.adder {
  display: flex;
  align-items: flex-start;
}

.adder > button {
  width: 100%;
  min-height: 160px;
  border-radius: 16px;
  border-style: dashed;
  white-space: normal;
  line-height: 1.3;
}

.adder form button { border-style: solid; }

.adder form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  background: var(--soft);
}

.boot { color: var(--muted); }

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  max-width: 100%;
  margin: 8px 0 0;
  padding: 6px 6px 6px 14px;
  background: var(--ink);
  color: var(--bg);
  border-radius: 999px;
  box-shadow: var(--shadow);
}

.toast[hidden], .banner[hidden] { display: none; }

.miss { width: min(40rem, 100%); margin: 12vh auto; }

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

@media (max-width: 720px) {
  .title-row { flex-direction: column; align-items: stretch; }
  .tools { justify-content: flex-start; }
  .composer { grid-template-columns: 1fr; }
  .composer button { width: 100%; }
  .board { scroll-snap-type: x mandatory; }
  .column, .adder {
    flex: 0 0 86%;
    min-width: 86%;
    max-width: 86%;
    scroll-snap-align: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}