:root {
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  color-scheme: light;
  --bg: #f4f1ed;
  --panel: #fffefa;
  --panel-soft: #f7f3ee;
  --text: #25221e;
  --muted: #7d766e;
  --line: #e4ded6;
  --line-strong: #d2c7bb;
  --accent: #7f6446;
  --accent-soft: #f1ebe3;
  --danger: #9f5148;
  --danger-soft: #f3e8e5;
  --done-bg: #e4f3df;
  --done-text: #3f6842;
  --shadow: 0 8px 20px rgba(42, 35, 28, 0.045);
}
* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

body.is-blank-dragging {
  user-select: none;
}

button,
input,
textarea {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.app {
  min-height: 100vh;
  padding: 0;
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 254, 250, 0.96);
  backdrop-filter: blur(10px);
}

.topbar h1 {
  margin: 0;
  font-size: 21px;
  font-weight: 750;
  letter-spacing: -0.02em;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.plain-btn {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--text);
  padding: 8px 14px;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(42, 35, 28, 0.035);
  transition: background 0.14s ease, border-color 0.14s ease;
}

.plain-btn:hover {
  background: #faf7f2;
  border-color: var(--line-strong);
}

.plain-btn:active {
  
}

.plain-btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.mode-btn[aria-pressed="true"] {
  border-color: rgba(127, 100, 70, 0.28);
  background: var(--accent-soft);
  color: var(--accent);
}

.mode-btn[aria-pressed="false"] {
  border-color: #e2d9cf;
  background: #f7f1e8;
  color: #70573b;
}

.board {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  height: calc(100vh - 64px);
  overflow-x: auto;
  overflow-y: hidden;
  padding: 20px 24px 24px;
  scrollbar-width: thin;
  cursor: grab;
}

.board.blank-dragging {
  cursor: grabbing;
}

.person-column {
  position: relative;
  flex: 0 0 330px;
  max-height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 18px 18px 20px;
  box-shadow: var(--shadow);
  scrollbar-width: thin;
  scrollbar-color: rgba(42, 35, 28, 0.14) transparent;
  scrollbar-gutter: stable both-edges;
}

.person-column.blank-dragging {
  cursor: grabbing;
}

.person-column::-webkit-scrollbar {
  width: 8px;
}

.person-column::-webkit-scrollbar-track {
  margin: 14px 0;
  background: transparent;
}

.person-column::-webkit-scrollbar-thumb {
  border: 2px solid var(--panel);
  border-radius: 999px;
  background: rgba(42, 35, 28, 0.13);
}

.person-column::-webkit-scrollbar-thumb:hover {
  background: rgba(42, 35, 28, 0.24);
}

.task-card,
.task-quick-add,
.person-head {
  cursor: default;
}

.readonly-mode input,
.readonly-mode textarea,
.readonly-mode button:not(#editModeBtn) {
  cursor: default;
}

.readonly-mode .drag-handle,
.readonly-mode .delete-task,
.readonly-mode .delete-person,
.readonly-mode .date-trigger,
.readonly-mode .clear-date {
  opacity: 0.22;
}

.readonly-mode .task-title {
  color: var(--text);
}

.delete-person {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 26px;
  height: 26px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  opacity: 0.48;
  transition: background 0.16s ease, color 0.16s ease, opacity 0.16s ease;
}

.delete-person:hover {
  background: var(--danger-soft);
  color: var(--danger);
  opacity: 1;
}

.person-head {
  display: grid;
  justify-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding: 2px 28px 0;
}

.avatar {
  width: 44px;
  height: 44px;
  border: 1px solid #ddd3c8;
  border-radius: 50%;
  background: #ebe4da;
  box-shadow: inset 0 0 0 4px #faf7f2;
  cursor: grab;
}

.avatar:hover {
  border-color: #c8baac;
  background: #e5ddd2;
}

.avatar:active,
.member-chosen .avatar {
  cursor: grabbing;
}

.member-ghost {
  opacity: 0.46;
}

.member-drag {
  opacity: 0.92;
}

.person-name {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 9px;
  outline: none;
  text-align: center;
  font-weight: 750;
  background: transparent;
  padding: 5px 8px;
  font-size: 17px;
  color: var(--text);
}

.person-name:focus {
  border-color: var(--line-strong);
  background: var(--panel-soft);
}

.task-list {
  display: grid;
  gap: 12px;
}

.task-quick-add {
  margin: 0 0 14px;
}

.task-quick-input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #faf6f0;
  color: var(--text);
  outline: 0;
  padding: 0 13px;
  box-shadow: none;
  transition: background 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.task-quick-input::placeholder {
  color: #9b9187;
}

.task-quick-input:focus {
  border-color: rgba(127, 100, 70, 0.42);
  box-shadow: 0 0 0 3px rgba(127, 100, 70, 0.09);
  background: var(--panel);
}

.task-card {
  position: relative;
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 12px 12px 24px;
  min-height: 84px;
  box-shadow: 0 3px 10px rgba(42, 35, 28, 0.035);
  transition: border-color 0.14s ease, box-shadow 0.14s ease;
}

.task-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 7px 16px rgba(42, 35, 28, 0.055);
}

.task-card.done {
  background: var(--done-bg);
  color: var(--done-text);
  border-color: #b8d9b6;
  box-shadow: 0 5px 14px rgba(76, 125, 81, 0.08);
}

.task-card.done .task-title {
  text-decoration: line-through;
  color: var(--done-text);
}

.task-card.done .task-done {
  accent-color: #4f9c57;
}

.task-chosen {
  cursor: grabbing;
}

.task-ghost {
  opacity: 0.45;
}

.task-drag {
  transform: rotate(1deg);
}

.task-tools {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 28px;
  padding-bottom: 8px;
  border-bottom: 1px solid #eee8e1;
}

.drag-handle {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 20px;
  border: 0;
  background: transparent;
  color: #b9afa4;
  cursor: grab;
  padding: 0;
}

.drag-handle::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  width: 8px;
  height: 1.5px;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 4px 0 currentColor, 0 8px 0 currentColor;
}

.drag-handle:hover {
  color: rgba(32, 33, 36, 0.72);
}

.drag-handle:active,
.task-chosen .drag-handle {
  cursor: grabbing;
}

.check-wrap {
  display: flex;
  flex: 0 0 auto;
  cursor: pointer;
}

.task-done {
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--accent);
}

.task-title {
  width: 100%;
  min-height: 38px;
  max-height: none;
  border: 0;
  outline: none;
  resize: none;
  overflow: hidden;
  background: transparent;
  line-height: 1.55;
  word-break: break-word;
  font-weight: 520;
  font-size: 15px;
  padding: 0;
  display: block;
  color: var(--text);
}

.task-side {
  display: flex;
  align-items: center;
  justify-items: end;
  gap: 6px;
  margin-left: auto;
}

.date-trigger {
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 0;
  opacity: 0.62;
  background-image: url("./assets/calendar.svg");
  background-position: center;
  background-repeat: no-repeat;
  background-size: 16px 16px;
  transition: background-color 0.16s ease, opacity 0.16s ease;
}

.date-trigger:hover,
.task-card.has-due .date-trigger {
  background-color: var(--accent-soft);
  opacity: 1;
}

.task-date {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.due-info {
  display: grid;
  justify-items: end;
  gap: 2px;
}

.due-info[hidden] {
  display: none;
}

.clear-date {
  width: 18px;
  height: 18px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 0;
  opacity: 0.48;
}

.clear-date[hidden] {
  display: none;
}

.clear-date:hover {
  background: var(--danger-soft);
  color: var(--danger);
  opacity: 1;
}

.due-date-label {
  color: var(--muted);
  font-size: 11px;
  white-space: nowrap;
}

.due-countdown {
  display: inline-flex;
  align-items: center;
  min-height: 18px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 1px 7px;
  font-size: 11px;
  font-weight: 750;
  white-space: nowrap;
}

.task-card.expired:not(.done) .due-countdown {
  background: var(--danger-soft);
  color: var(--danger);
}

.delete-task {
  position: absolute;
  right: 8px;
  bottom: 5px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 2px 5px;
  opacity: 0.42;
  transition: background 0.16s ease, color 0.16s ease, opacity 0.16s ease;
}

.task-card:hover .delete-task {
  opacity: 0.8;
}

.delete-task:hover {
  background: var(--danger-soft);
  color: var(--danger);
  opacity: 1;
}

.flatpickr-calendar {
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 14px 36px rgba(42, 35, 28, 0.10);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}

.flatpickr-months,
.flatpickr-weekdays {
  background: var(--panel);
}

.flatpickr-day.selected,
.flatpickr-day.startRange,
.flatpickr-day.endRange,
.flatpickr-day.selected:hover {
  border-color: var(--accent);
  background: var(--accent);
}

.flatpickr-time {
  border-top-color: var(--line);
}

.flatpickr-time input,
.flatpickr-time .flatpickr-am-pm {
  font-weight: 700;
}

@media (max-width: 720px) {
  body {
    overflow: auto;
  }

  .app {
    padding: 0;
    overflow: auto;
  }

  .topbar {
    height: auto;
    min-height: 64px;
    align-items: stretch;
    flex-direction: column;
    padding: 16px;
  }

  .top-actions {
    justify-content: space-between;
  }

  .board {
    height: auto;
    min-height: calc(100vh - 110px);
    padding: 16px;
  }

  .person-column {
    flex-basis: 300px;
  }

  .task-card {
    gap: 10px;
  }

  .task-tools {
    align-items: center;
    flex-direction: row;
    flex-wrap: wrap;
  }
}