:root {
  --bg: #f6f4f1;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --accent: #8b7355;
  --accent-soft: #ebe4db;
  --border: #e5e0d8;
  --shadow: 0 1px 3px rgba(26, 26, 26, 0.08);
  --radius: 12px;
  --col-backlog: #f0f0f0;
  --col-progress: #e8f0fe;
  --col-review: #fff8e6;
  --col-done: #e8f5e9;
  --col-blocked: #fdecea;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}
.hidden { display: none !important; }

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 16px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 14px; flex: 1; min-width: 200px; }
.brand-mark {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 14px;
}
.brand h1 { margin: 0; font-size: 18px; font-weight: 600; }
.subtitle { margin: 2px 0 0; font-size: 13px; color: var(--muted); }

.view-tabs { display: flex; gap: 4px; background: var(--bg); padding: 4px; border-radius: 10px; }
.view-tab {
  border: none;
  background: transparent;
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
}
.view-tab.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }

.btn {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.ghost { background: transparent; }
.link-btn { background: none; border: none; color: var(--accent); cursor: pointer; text-decoration: underline; }

.kpi-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  padding: 16px 24px;
}
.kpi-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.kpi-label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.kpi-value { font-size: 20px; font-weight: 700; margin: 6px 0; }
.kpi-hint { font-size: 11px; color: var(--muted); }
.progress { height: 6px; background: var(--accent-soft); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); width: 0%; transition: width 0.4s ease; }
.progress-fill.closure { background: #4a7c59; }

.banner {
  margin: 0 24px 8px;
  padding: 10px 14px;
  background: #fff8e6;
  border-radius: 8px;
  font-size: 13px;
}

.board-toolbar {
  display: flex;
  gap: 12px;
  padding: 0 24px 12px;
  align-items: center;
  flex-wrap: wrap;
}
.select, .search {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: var(--surface);
}
.search { flex: 1; min-width: 180px; max-width: 320px; }

.board {
  display: flex;
  gap: 12px;
  padding: 0 24px 32px;
  overflow-x: auto;
  min-height: 60vh;
  align-items: flex-start;
}
.column {
  flex: 0 0 280px;
  background: #eceae6;
  border-radius: var(--radius);
  padding: 10px;
  max-height: calc(100vh - 280px);
  overflow-y: auto;
}
.column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  padding: 4px 6px;
}
.column-title { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.column-count {
  font-size: 12px;
  background: rgba(0,0,0,0.06);
  padding: 2px 8px;
  border-radius: 99px;
}
.column[data-status="backlog"] { background: var(--col-backlog); }
.column[data-status="in_progress"] { background: var(--col-progress); }
.column[data-status="review"] { background: var(--col-review); }
.column[data-status="done"] { background: var(--col-done); }
.column[data-status="blocked"] { background: var(--col-blocked); }

.card {
  background: var(--surface);
  border-radius: 10px;
  padding: 12px;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  cursor: grab;
  border: 1px solid transparent;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.card:hover { border-color: var(--accent-soft); }
.card.dragging { opacity: 0.5; cursor: grabbing; }
.card.drop-target { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.card-week { font-size: 11px; font-weight: 700; color: var(--accent); }
.card-title { font-size: 14px; font-weight: 600; margin: 4px 0; }
.card-meta { font-size: 11px; color: var(--muted); display: flex; gap: 6px; flex-wrap: wrap; }
.tag {
  display: inline-block;
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-soft);
  color: var(--accent);
}
.tag.p0 { background: #fdecea; color: #b42318; }

.timeline { padding: 16px 24px 40px; overflow-x: auto; }
.timeline-track {
  display: flex;
  gap: 8px;
  min-width: max-content;
  padding-bottom: 16px;
}
.timeline-month {
  flex: 0 0 140px;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
}
.timeline-month h3 { margin: 0 0 10px; font-size: 13px; color: var(--muted); }
.timeline-item {
  font-size: 12px;
  padding: 8px;
  margin-bottom: 6px;
  background: var(--bg);
  border-radius: 8px;
  cursor: pointer;
  border-left: 3px solid var(--accent);
}
.timeline-item.milestone { border-left-color: #b42318; }

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  padding: 0 24px 40px;
}
.metric-block {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.metric-block h2 { margin: 0 0 16px; font-size: 15px; }

.chart-bars { display: flex; align-items: flex-end; gap: 6px; height: 160px; }
.chart-bar-wrap { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px; }
.chart-bar {
  width: 100%;
  max-width: 32px;
  background: var(--accent);
  border-radius: 4px 4px 0 0;
  min-height: 4px;
}
.chart-label { font-size: 10px; color: var(--muted); }

.sku-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.milestones, .activity { list-style: none; padding: 0; margin: 0; }
.milestones li, .activity li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.activity time { color: var(--muted); font-size: 11px; }

dialog {
  border: none;
  border-radius: var(--radius);
  padding: 24px;
  max-width: 440px;
  width: 90vw;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}
dialog::backdrop { background: rgba(0,0,0,0.35); }
dialog label { display: block; margin-bottom: 12px; font-size: 13px; font-weight: 500; }
dialog input, dialog textarea, dialog select {
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.hint { font-size: 12px; color: var(--muted); }

.checklist-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  padding: 4px 0;
}
.checklist-item.done { text-decoration: line-through; color: var(--muted); }

@media (max-width: 768px) {
  .topbar { padding: 12px 16px; }
  .kpi-strip, .board-toolbar, .board, .timeline, .metrics-grid { padding-left: 16px; padding-right: 16px; }
  .column { flex: 0 0 260px; }
}