:root {
  --bg: #ffffff;
  --panel: #fcfcfc;
  --ink: #000000;
  --muted: #5f5f5f;
  --line: #d9d9d9;
  --accent: #000000;
  --accent-2: #1a1a1a;
  --danger: #000000;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  --shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background:
    linear-gradient(180deg, #ffffff 0%, #fbfbfb 100%);
}

button,
input,
textarea,
select {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  width: min(1320px, 100%);
  margin: 0 auto;
  padding: 24px 16px;
  display: grid;
  align-content: center;
  gap: 12px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 8px;
  text-align: left;
  flex-direction: row;
}

.topbar h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.version-badge {
  display: inline-block;
  vertical-align: middle;
  margin-left: 8px;
  padding: 2px 8px;
  border: 1px solid #d0d0d0;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  color: #555;
  background: #fafafa;
}

.version-badge:empty {
  display: none;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.session {
  min-height: 1.5rem;
  color: var(--ink);
  font-weight: 500;
  padding-top: 4px;
}

.panel {
  max-width: 420px;
  width: 100%;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.stack {
  display: grid;
  gap: 10px;
}

.auth-mode-toggle {
  display: flex;
  gap: 8px;
  margin: 8px 0 12px;
}

.remember-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #333;
}

.remember-row input {
  min-width: 14px;
  margin: 0;
}

.board-page {
  display: grid;
  gap: 14px;
  width: 100%;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: flex-start;
  border-bottom: 1px solid #ececec;
  padding-bottom: 10px;
}

#logoutBtn {
  margin-left: auto;
}

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

.compact-form {
  margin-bottom: 10px;
}

input,
textarea,
select {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 6px;
  padding: 9px 11px;
  min-width: 0;
}

textarea {
  resize: vertical;
  min-height: 64px;
}

button {
  border: 1px solid #000;
  background: var(--accent);
  color: #fff;
  padding: 9px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.small-btn {
  padding: 6px 10px;
  font-size: 0.88rem;
}

button:hover {
  background: var(--accent-2);
}

button.ghost {
  background: #fff;
  color: #4a4a4a;
  border-color: var(--line);
}

button.ghost:hover {
  color: #000;
  border-color: #000;
}

button.danger {
  background: #c1121f;
  color: #fff;
  border-color: #9b0d18;
}

button.danger:hover {
  background: #9b0d18;
}

.lists {
  display: grid;
  grid-template-columns: repeat(var(--list-columns, 4), minmax(0, 1fr));
  justify-content: center;
  align-items: start;
  gap: 12px;
  overflow: visible;
  padding-bottom: 8px;
  min-width: 0;
}

.lists.scrollable-lists {
  grid-template-columns: none;
  grid-auto-flow: column;
  grid-auto-columns: calc((100% - (12px * 3)) / 4);
  overflow-x: auto;
  overflow-y: visible;
  align-items: start;
}

.list {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  box-shadow: var(--shadow);
  align-self: flex-start;
}

.list-header {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
}

.list-header input {
  flex: 1;
  font-weight: 600;
  font-size: 1.05rem;
  border-color: #cfcfcf;
}

.list-menu-wrap {
  position: relative;
}

.list-menu-btn {
  min-width: 38px;
  letter-spacing: 1px;
}

.list-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  min-width: 140px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 4px;
  z-index: 10;
}

.list-menu-item {
  display: block;
  width: 100%;
  text-align: left;
  background: #fff;
  color: #000;
  border: 0;
  padding: 8px 10px;
  border-radius: 6px;
}

.list-menu-item:hover {
  background: #f3f3f3;
}

.card-list {
  display: grid;
  gap: 10px;
  margin-bottom: 10px;
  min-height: 160px;
  align-content: start;
  padding: 4px;
  border-radius: 8px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #ffffff;
  display: grid;
  gap: 8px;
  box-shadow: var(--shadow-soft);
}

.card:focus-within {
  border-color: #000;
  box-shadow: 0 0 0 1px #000;
}

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

.row > * {
  flex: 1;
}

.row .fit {
  flex: 0 0 auto;
}

.compact-card {
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px;
  cursor: pointer;
}

.compact-card:hover {
  border-color: #b8b8b8;
}

.compact-card.card-updated {
  border-color: #000;
  box-shadow: 0 0 0 1px #000, var(--shadow-soft);
  background: #fafafa;
}

.compact-card.dragging {
  opacity: 0.5;
}

.drag-handle {
  color: #8c8c8c;
  line-height: 1;
  padding-top: 2px;
  user-select: none;
}

.card-main {
  min-width: 0;
}

.card-title-text {
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 6px;
}

.card-assignees-line {
  color: #333;
  font-size: 0.78rem;
  margin-bottom: 6px;
}

.updated-badge {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #000;
  margin-bottom: 4px;
}

.card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid #cfcfcf;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  background: #fff;
}

.user-chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid #111;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  background: #fff;
}

.pill.muted {
  color: #666;
  font-weight: 500;
}

.label-pill {
  border-style: solid;
  color: #111;
}

.priority-low {
  background: #f7f7f7;
}

.priority-medium {
  background: #efefef;
  border-color: #bdbdbd;
}

.priority-high {
  background: #111;
  color: #fff;
  border-color: #111;
}

.due-later {
  background: #fff;
}

.due-upcoming {
  background: #f3f3f3;
  border-color: #cfcfcf;
}

.due-soon {
  background: #fff3e8;
  border-color: #f0b27a;
}

.due-today {
  background: #ffe8e8;
  border-color: #e78a8a;
}

.due-overdue {
  background: #c1121f;
  color: #fff;
  border-color: #c1121f;
}

.priority-pill {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.card-preview {
  color: #666;
  font-size: 0.78rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 170px;
}

.card-preview-block {
  margin-top: 6px;
  color: #444;
  font-size: 0.85rem;
  line-height: 1.25;
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.mini-checklist {
  margin-top: 8px;
  display: grid;
  gap: 4px;
  border-top: 1px dashed #e7e7e7;
  padding-top: 7px;
}

.mini-check {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 6px;
  align-items: start;
  font-size: 0.78rem;
  color: #444;
}

.mini-check-box {
  width: 14px;
  height: 14px;
  border: 1px solid #bdbdbd;
  border-radius: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  font-size: 0.68rem;
  margin-top: 0;
  text-align: center;
  vertical-align: middle;
}

.mini-check.done .mini-check-text {
  text-decoration: line-through;
  color: #777;
}

.mini-check.done .mini-check-box {
  background: #111;
  color: #fff;
  border-color: #111;
}

.mini-check-text {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

.mini-check-more {
  color: #666;
  font-size: 0.76rem;
}

.card-footer-meta {
  margin-top: 8px;
  padding-top: 6px;
  border-top: 1px solid #efefef;
  color: #666;
  font-size: 0.74rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.card-footer-right {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #666;
}

.card-created-by {
  margin-top: 4px;
  color: #666;
  font-size: 0.72rem;
}

.archive-item-actions {
  margin-top: 8px;
}

.drop-zone.drag-over {
  background: #f7f7f7;
  border-radius: 8px;
  outline: 1px dashed #c9c9c9;
}

.hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.activity-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 12px;
  box-shadow: var(--shadow);
  margin-top: 4px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.activity-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.activity-header h3 {
  margin: 0;
  font-size: 1rem;
}

.activity-header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.activity-strip {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.activity-item {
  min-width: 280px;
  max-width: 360px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.activity-item small {
  color: var(--muted);
}

.activity-message {
  margin-bottom: 6px;
  line-height: 1.35;
}

.activity-message strong {
  font-weight: 700;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.25);
  display: grid;
  place-items: center;
  padding: 16px;
  z-index: 100;
}

.modal-card {
  width: min(720px, 100%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
  padding: 14px;
}

.prompt-modal {
  width: min(520px, 100%);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.modal-header h3 {
  margin: 0;
  font-size: 1.05rem;
}

.modal-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.modal-grid label {
  display: grid;
  gap: 6px;
}

.modal-grid label span {
  font-size: 0.85rem;
  color: #444;
  font-weight: 600;
}

.modal-grid .full {
  grid-column: 1 / -1;
}

.modal-actions {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
}

.modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 10px;
  color: #666;
}

.modal-meta small {
  font-size: 0.78rem;
}

.checklist-section {
  border-top: 1px solid #eee;
  padding-top: 8px;
}

.checklist-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.checklist-header span {
  font-size: 0.85rem;
  color: #444;
  font-weight: 600;
}

.checklist-items {
  display: grid;
  gap: 6px;
}

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

.label-option-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid #e4e4e4;
  border-radius: 999px;
  padding: 4px 8px;
  background: #fff;
  cursor: pointer;
}

.labels-manager-list {
  display: grid;
  gap: 8px;
  margin-bottom: 12px;
}

.modal-dropdown {
  margin-top: 6px;
}

.modal-dropdown-summary {
  list-style: none;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  background: #fff;
  color: #222;
  font-size: 0.9rem;
}

.modal-dropdown-summary::-webkit-details-marker {
  display: none;
}

.modal-dropdown[open] .modal-dropdown-summary {
  border-color: #000;
}

.modal-dropdown-content {
  margin-top: 8px;
}

.label-edit-row {
  display: grid;
  grid-template-columns: 44px 1fr auto;
  gap: 8px;
  align-items: center;
}

.label-edit-color {
  width: 44px;
  min-width: 44px;
  padding: 2px;
  height: 34px;
}

.label-edit-name {
  width: 100%;
}

.label-option-row input {
  margin: 0;
  min-width: 14px;
}

.checklist-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: center;
}

.checklist-row .checklist-done {
  width: 16px;
  height: 16px;
  min-width: 16px;
  padding: 0;
}

.checklist-row .checklist-text {
  width: 100%;
}

@media (max-width: 768px) {
  .app-shell {
    padding: 16px 10px;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  #logoutBtn {
    margin-left: 0;
  }

  .list {
    width: 100%;
  }

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

  .lists.scrollable-lists {
    grid-auto-columns: 100%;
  }

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

  .modal-actions {
    flex-direction: column;
  }
}

@media (min-width: 769px) and (max-width: 1100px) {
  .lists {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lists.scrollable-lists {
    grid-auto-columns: calc((100% - 12px) / 2);
  }
}

@media (min-width: 1101px) and (max-width: 1360px) {
  .lists {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .lists.scrollable-lists {
    grid-auto-columns: calc((100% - (12px * 2)) / 3);
  }
}