*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --border: #dfe1e6;
  --text: #172b4d;
  --text-secondary: #5e6c84;
  --primary: #0052cc;
  --primary-hover: #0065ff;
  --danger: #de350b;
  --danger-hover: #bf2600;
  --success: #36b37e;
  --column-bg: #ebecf0;
  --shadow: 0 1px 3px rgba(9, 30, 66, 0.13);
  --radius: 8px;
  --radius-sm: 4px;
}

html {
  font-size: 15px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 100;
}

header h1 { font-size: 1.2rem; font-weight: 700; margin: 0; }

.logo {
  color: var(--text);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo:hover { color: var(--primary); }

nav {
  display: flex;
  gap: 4px;
}

nav a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

nav a:hover {
  background: var(--column-bg);
  color: var(--text);
}

nav a.active {
  background: var(--primary);
  color: #fff;
}

.header-meta {
  margin-left: auto;
  font-size: 0.8rem;
}

.share-hint {
  color: var(--text-secondary);
}

.share-hint code {
  background: var(--column-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.75rem;
}

.btn-logout {
  margin-left: 12px;
  font-size: 0.8rem;
  color: var(--danger);
  font-weight: 500;
}
.btn-logout:hover { color: var(--danger-hover); }

.share-badge {
  font-size: 0.65rem;
  background: var(--success);
  color: #fff;
  padding: 2px 8px;
  border-radius: 10px;
  vertical-align: middle;
  margin-left: 6px;
}

.share-notice {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Kanban */
.kanban {
  display: flex;
  gap: 12px;
  padding: 24px;
  overflow-x: auto;
  min-height: calc(100vh - 60px);
  align-items: flex-start;
}

.column {
  background: var(--column-bg);
  border-radius: var(--radius);
  min-width: 260px;
  max-width: 320px;
  flex: 0 0 280px;
  display: flex;
  flex-direction: column;
}

.column-header {
  padding: 12px 12px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.column-header h2 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}

.column-count {
  background: var(--border);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 1px 8px;
  border-radius: 10px;
}

.task-list {
  padding: 4px 8px 8px;
  flex: 1;
  min-height: 60px;
}

.task-list.readonly .task-card {
  cursor: default;
}

.task-card {
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 6px;
  box-shadow: var(--shadow);
  cursor: grab;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  transition: box-shadow 0.15s;
}

.task-card:hover {
  box-shadow: 0 2px 6px rgba(9, 30, 66, 0.2);
}

.task-card.sortable-chosen {
  box-shadow: 0 4px 12px rgba(9, 30, 66, 0.25);
  opacity: 0.9;
}

.task-card.sortable-ghost {
  opacity: 0.4;
  background: var(--border);
}

.task-body {
  flex: 1;
  min-width: 0;
}

.task-title {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  word-break: break-word;
}

.task-hours {
  display: inline-block;
  margin-top: 4px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--column-bg);
  padding: 1px 6px;
  border-radius: 3px;
}

.task-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s;
}

.task-card:hover .task-actions {
  opacity: 1;
}

.btn-edit, .btn-delete, .btn-close-modal {
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 4px;
  font-size: 0.85rem;
  border-radius: 3px;
  color: var(--text-secondary);
}

.btn-edit:hover { background: var(--column-bg); color: var(--primary); }
.btn-delete:hover { background: #ffebe6; color: var(--danger); }

.btn-add-task {
  margin: 4px 8px 8px;
  padding: 8px;
  background: none;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-add-task:hover {
  background: rgba(9, 30, 66, 0.04);
  color: var(--primary);
  border-color: var(--primary);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(9, 30, 66, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal.hidden {
  display: none;
}

.modal-content {
  background: var(--surface);
  border-radius: var(--radius);
  width: 420px;
  max-width: 90vw;
  box-shadow: 0 8px 24px rgba(9, 30, 66, 0.2);
}

.modal-header {
  padding: 16px 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.1rem;
}

.modal-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-body label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.modal-body input {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
}

.modal-body input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(0, 82, 204, 0.15);
}

.modal-footer {
  padding: 0 20px 16px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

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

.btn-secondary {
  background: var(--column-bg);
  color: var(--text);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

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

/* Calendar */
.calendar-header {
  padding: 24px 24px 0;
}

.calendar-subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.calendar-grid {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 1120px;
  margin: 0 auto;
}

.calendar-week {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}

.week-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.calendar-days {
  display: flex;
  gap: 8px;
}

.calendar-day {
  background: var(--column-bg);
  border-radius: var(--radius-sm);
  padding: 10px;
  flex: 1 1 0;
  min-width: 0;
  max-width: 200px;
}

.calendar-day.today {
  border: 2px solid var(--primary);
}

.day-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}

.day-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.day-date {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.day-total {
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--primary);
}

.day-tasks {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.day-task {
  background: var(--surface);
  border-radius: 3px;
  padding: 6px 8px;
  box-shadow: 0 1px 2px rgba(9, 30, 66, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 4px;
}

.day-task-title {
  font-size: 0.8rem;
  font-weight: 500;
  word-break: break-word;
  flex: 1;
  min-width: 0;
}

.day-task-hours {
  font-size: 0.7rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* Empty state */
.empty-state {
  padding: 48px 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Share view */
.share-view .task-card {
  cursor: default;
}

.share-calendar {
  padding: 0 24px 24px;
}

.share-calendar h2 {
  font-size: 1rem;
  margin-bottom: 12px;
}

/* Utility */
.hidden { display: none !important; }