:root {
  --bg: #f4f5f7;
  --text: #172b4d;
  --column-bg: #ebecf0;
  --count-bg: #dfe1e6;
  --card-bg: #ffffff;
  --card-shadow: rgba(9, 30, 66, 0.15);
  --border: #dfe1e6;
  --accent: #0052cc;
  --accent-hover: #0747a6;
  --text-muted: #6b778c;
  --danger: #de350b;
}

body.dark {
  --bg: #1d2125;
  --text: #b6c2cf;
  --column-bg: #22272b;
  --count-bg: #2c333a;
  --card-bg: #282e33;
  --card-shadow: rgba(0, 0, 0, 0.4);
  --border: #3c444d;
  --accent: #4c9aff;
  --accent-hover: #85b8ff;
  --text-muted: #8c9bab;
  --danger: #f87168;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background-color 0.2s, color 0.2s;
}

.app-header {
  padding: 24px 32px 8px;
}

.app-header h1 {
  margin: 0;
  font-size: 24px;
}

#board {
  display: flex;
  gap: 16px;
  padding: 16px 32px 32px;
  align-items: flex-start;
}

.column {
  flex: 1;
  min-width: 0;
  background: var(--column-bg);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  padding: 0 4px;
}

.column-header h2 {
  margin: 0;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.count {
  background: var(--count-bg);
  border-radius: 12px;
  padding: 2px 8px;
  font-size: 12px;
}

.task-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 40px;
}

.add-task-form {
  display: flex;
  gap: 6px;
}

.add-task-input {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: var(--card-bg);
  color: var(--text);
}

.add-task-btn {
  padding: 8px 12px;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-size: 14px;
  cursor: pointer;
}

.add-task-btn:hover {
  background: var(--accent-hover);
}

@media (max-width: 700px) {
  #board {
    flex-direction: column;
  }
}

.task-card {
  background: var(--card-bg);
  border-radius: 6px;
  padding: 10px 12px;
  box-shadow: 0 1px 2px var(--card-shadow);
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-left: 3px solid transparent;
}

.task-text {
  flex: 1;
  outline: none;
  font-size: 14px;
  line-height: 1.4;
  word-break: break-word;
}

.task-text:focus {
  background: var(--bg);
  border-radius: 4px;
}

.delete-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}

.delete-btn:hover {
  color: var(--danger);
}

.task-card[draggable="true"] {
  cursor: grab;
}

.task-list.drag-over {
  background: var(--count-bg);
  border-radius: 6px;
  outline: 2px dashed var(--accent);
  outline-offset: -2px;
}

.header-top {
  display: flex;
  align-items: center;
  gap: 12px;
}

#theme-toggle {
  margin-left: auto;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 16px;
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.toast.hidden {
  display: none;
}

#toast-undo-btn {
  background: none;
  border: none;
  color: var(--accent-hover);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.task-card[data-label="red"] { border-left-color: #de350b; }
.task-card[data-label="orange"] { border-left-color: #ff8b00; }
.task-card[data-label="yellow"] { border-left-color: #ffc400; }
.task-card[data-label="green"] { border-left-color: #36b37e; }
.task-card[data-label="blue"] { border-left-color: #0052cc; }
.task-card[data-label="purple"] { border-left-color: #6554c0; }

.task-top-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
}

.label-row {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

.label-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--border);
  cursor: pointer;
  padding: 0;
}

.label-dot[data-color="red"] { background: #de350b; }
.label-dot[data-color="orange"] { background: #ff8b00; }
.label-dot[data-color="yellow"] { background: #ffc400; }
.label-dot[data-color="green"] { background: #36b37e; }
.label-dot[data-color="blue"] { background: #0052cc; }
.label-dot[data-color="purple"] { background: #6554c0; }

.label-dot.active {
  outline: 2px solid var(--text);
  outline-offset: 1px;
}

.deadline-row {
  display: flex;
}

.deadline-input {
  font-size: 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 4px;
  background: var(--card-bg);
  color: var(--text-muted);
}

.task-card.overdue {
  border-left-color: var(--danger);
}

.task-card.overdue .deadline-input {
  color: var(--danger);
  border-color: var(--danger);
}

.filter-bar {
  display: flex;
  gap: 8px;
  padding: 0 32px 12px;
}

#search-input {
  flex: 1;
  max-width: 320px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: var(--card-bg);
  color: var(--text);
}

#label-filter {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: var(--card-bg);
  color: var(--text);
}

@keyframes card-enter {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes card-exit {
  from { opacity: 1; }
  to { opacity: 0; transform: scale(0.96); }
}

.card-enter {
  animation: card-enter 150ms ease-out;
}

.card-exit {
  animation: card-exit 200ms ease-in forwards;
  pointer-events: none;
}

.board-switcher {
  display: flex;
  gap: 4px;
  align-items: center;
}

#board-select {
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 14px;
}

.board-switcher button {
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  border-radius: 6px;
  padding: 4px 8px;
  cursor: pointer;
  font-size: 14px;
}

.hidden {
  display: none !important;
}

.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}

.auth-card {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 16px var(--card-shadow);
  text-align: center;
  max-width: 360px;
}

.auth-card h1 {
  margin: 0 0 8px;
  color: var(--text);
}

.auth-card p {
  color: var(--text-muted);
  margin: 0 0 20px;
}

.google-btn {
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-size: 14px;
  cursor: pointer;
}

.google-btn:hover {
  background: var(--accent-hover);
}

.user-email {
  font-size: 13px;
  color: var(--text-muted);
  margin-left: auto;
}

#logout-btn {
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 14px;
}