:root {
  color-scheme: light;
  font-family: Inter, "Segoe UI", Roboto, system-ui, sans-serif;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-soft: #f9fafc;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --danger: #dc2626;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #fbfcff 0%, var(--bg) 100%);
  color: var(--text);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 5;
}

.topbar h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.01em;
  font-weight: 650;
}

.toolbar button {
  margin-left: 8px;
  max-width: 200px;
}

.layout {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 64px);
}

.board-area {
  flex: 1;
  overflow: auto;
  padding: 16px;
}

.sticky-area {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(6px);
}

.sticky-note {
  max-width: 980px;
  margin: 0 auto;
  background: linear-gradient(180deg, #fff9d6 0%, #fde68a 100%);
  border: 1px solid #f59e0b77;
  border-radius: 14px;
  box-shadow: 0 12px 26px rgba(245, 158, 11, 0.22);
  padding: 12px 14px 14px;
  transform: rotate(-0.3deg);
}

.sticky-note-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
  margin-bottom: 8px;
}

.sticky-note-header strong {
  color: #92400e;
  font-size: 14px;
}

.board-subheader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.board-subheader h2 {
  margin: 0;
  font-size: 16px;
  color: #111827;
  letter-spacing: -0.01em;
}

#sticky-note-text {
  width: 100%;
  min-height: 110px;
  resize: vertical;
  border: 1px dashed rgba(146, 64, 14, 0.35);
  background: rgba(255, 255, 255, 0.65);
  border-radius: 12px;
  color: #7c2d12;
  padding: 10px 12px;
  box-sizing: border-box;
}

.board {
  display: grid;
  grid-template-columns: repeat(2, minmax(360px, 1fr));
  gap: 16px;
  align-items: start;
  padding-bottom: 8px;
}

.column {
  width: auto;
  min-height: 70vh;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: 0 6px 20px rgba(17, 24, 39, 0.06);
}

@media (max-width: 900px) {
  .board {
    grid-template-columns: 1fr;
  }
}

.column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

.column-header strong {
  font-size: 14px;
  letter-spacing: 0.01em;
}

.column-header .count {
  font-size: 12px;
  color: var(--text-muted);
}

.lane {
  margin: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-soft);
}

.lane-header {
  padding: 8px 10px;
  font-size: 12px;
  color: #374151;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

.lane-list {
  min-height: 85px;
  padding: 10px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  margin-bottom: 10px;
  background: #ffffff;
  cursor: grab;
  box-shadow: 0 1px 2px rgba(17, 24, 39, 0.08);
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.2s ease;
}

.card:hover {
  box-shadow: 0 8px 18px rgba(17, 24, 39, 0.08);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.card.card-gap {
  border-color: #f9a8d4;
  background: linear-gradient(180deg, #fdf2f8 0%, #fce7f3 100%);
  box-shadow: 0 4px 14px rgba(190, 24, 93, 0.12);
}

.card.card-gap:hover {
  border-color: #ec4899;
  box-shadow: 0 10px 22px rgba(190, 24, 93, 0.16);
}

.card.card-gap strong {
  color: #9d174d;
}

.card.card-gap .meta,
.card.card-gap details,
.card.card-gap p,
.card.card-gap summary {
  color: #831843;
}

.card.card-gap .chip {
  border-color: #f9a8d4;
  background: #fbcfe8;
  color: #9d174d;
}

.card.card-gap .edit-btn {
  border-color: #f5b6d3;
  background: #fff;
  color: #9d174d;
}

.card.card-gap .delete-btn {
  border-color: #f9a8d4;
  background: #ffe4ef;
  color: #9d174d;
}

.card strong {
  display: block;
  margin-bottom: 4px;
  color: #111827;
  font-size: 14px;
  line-height: 1.3;
}

.meta {
  font-size: 12px;
  color: var(--text-muted);
}

.chips {
  margin-top: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.chip {
  font-size: 11px;
  border: 1px solid #c7d2fe;
  border-radius: 999px;
  padding: 2px 7px;
  color: #3730a3;
  background: var(--accent-soft);
}

.card-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.delete-btn {
  border-color: #fecaca;
  color: #b91c1c;
  background: #fff5f5;
}

.card details {
  margin-top: 8px;
  color: #374151;
}

label {
  display: block;
  margin: 8px 0;
  color: #374151;
  font-size: 13px;
  font-weight: 500;
}

input,
textarea,
select,
button {
  width: 100%;
  box-sizing: border-box;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  color: var(--text);
  font: inherit;
}

button {
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  background: #ffffff;
}

button:hover {
  border-color: #c7d2fe;
}

#add-card-btn,
#load-baseline-btn,
#save-card-btn {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2);
}

#add-card-btn:hover,
#load-baseline-btn:hover,
#save-card-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(79, 70, 229, 0.26);
}

.dialog-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

dialog {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  width: min(520px, 92vw);
  background: #ffffff;
  color: var(--text);
  box-shadow: 0 20px 45px rgba(17, 24, 39, 0.18);
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.35);
}