:root {
  --bg-top: #f6efe3;
  --bg-mid: #f7f8ff;
  --bg-low: #eef7f3;
  --ink: #1f2d3d;
  --muted: #587083;
  --paper: rgba(255, 255, 255, 0.88);
  --line: rgba(31, 45, 61, 0.12);
  --shadow: 0 18px 40px rgba(31, 45, 61, 0.12);
  --todo: #ffe2b7;
  --doing: #cce6ff;
  --review: #e4ddff;
  --done: #d8f2cb;
  --risk: #ffd6dc;
  --ml: #ffe18e;
  --audio: #b9f1dc;
  --safety: #ffc4cf;
  --product: #c9d8ff;
  --infra: #e8e0cf;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 225, 142, 0.6), transparent 24%),
    radial-gradient(circle at top right, rgba(185, 241, 220, 0.5), transparent 20%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-mid) 40%, var(--bg-low) 100%);
}

.wrap {
  width: min(1440px, calc(100% - 28px));
  margin: 18px auto 28px;
  display: grid;
  gap: 18px;
}

.hero,
.notes,
.references,
.column {
  background: var(--paper);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
}

.hero {
  padding: 24px;
  border-radius: 28px;
  display: grid;
  gap: 14px;
}

.eyebrow {
  width: fit-content;
  padding: 6px 12px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--line);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 0.95;
}

.hero p {
  margin: 0;
  max-width: 900px;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.55;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  padding: 9px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  font-size: 0.93rem;
  font-weight: 700;
}

.notes {
  padding: 18px;
  border-radius: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.references {
  padding: 18px;
  border-radius: 22px;
  display: grid;
  gap: 14px;
}

.references h2 {
  margin: 0;
  font-size: 1.1rem;
}

.reference-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.note {
  padding: 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
}

.note strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.note p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
  font-size: 0.95rem;
}

.note a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.toolbar button {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 8px 18px rgba(31, 45, 61, 0.08);
}

.toolbar button.primary {
  background: #21344d;
  color: white;
}

.board {
  display: grid;
  grid-template-columns: repeat(5, minmax(250px, 1fr));
  gap: 16px;
  align-items: start;
  overflow-x: auto;
  padding-bottom: 4px;
}

.column {
  border-radius: 24px;
  padding: 14px;
  min-height: 420px;
  display: grid;
  gap: 12px;
}

.column-header {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}

.column-title {
  margin: 0;
  font-size: 1.02rem;
}

.column-count {
  min-width: 34px;
  text-align: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  font-size: 0.86rem;
  font-weight: 800;
}

.column[data-column="todo"] { background: linear-gradient(180deg, var(--todo), rgba(255,255,255,0.72)); }
.column[data-column="doing"] { background: linear-gradient(180deg, var(--doing), rgba(255,255,255,0.72)); }
.column[data-column="review"] { background: linear-gradient(180deg, var(--review), rgba(255,255,255,0.72)); }
.column[data-column="done"] { background: linear-gradient(180deg, var(--done), rgba(255,255,255,0.72)); }
.column[data-column="risk"] { background: linear-gradient(180deg, var(--risk), rgba(255,255,255,0.72)); }

.dropzone {
  min-height: 340px;
  display: grid;
  gap: 12px;
  align-content: start;
  border-radius: 18px;
  padding: 2px;
  transition: background 120ms ease, outline 120ms ease;
}

.dropzone.over {
  outline: 2px dashed rgba(31, 45, 61, 0.25);
  background: rgba(255, 255, 255, 0.35);
}

.card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(31, 45, 61, 0.08);
  border-radius: 18px;
  padding: 14px;
  display: grid;
  gap: 12px;
  box-shadow: 0 10px 22px rgba(31, 45, 61, 0.08);
  cursor: grab;
}

.card.dragging {
  opacity: 0.45;
  transform: rotate(1deg);
}

.card-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: start;
}

.card h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.25;
}

.priority {
  padding: 5px 8px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.priority.p0 { background: #ffccd3; }
.priority.p1 { background: #ffe4b5; }
.priority.p2 { background: #d9e7ff; }
.priority.p3 { background: #e6efe7; }

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.5;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  padding: 6px 9px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tag.ml { background: var(--ml); }
.tag.audio { background: var(--audio); }
.tag.safety { background: var(--safety); }
.tag.product { background: var(--product); }
.tag.infra { background: var(--infra); }

.checklist {
  display: grid;
  gap: 8px;
}

.checklist label {
  display: flex;
  gap: 9px;
  align-items: start;
  font-size: 0.9rem;
  color: var(--ink);
  line-height: 1.35;
}

.checklist input {
  margin-top: 2px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.86rem;
  color: var(--muted);
}

.links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.links a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

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

  .reference-grid {
    grid-template-columns: 1fr;
  }
}