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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: #f8fafc;
  color: #0f172a;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 16px;
}

.app-header {
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: #fff;
  padding: 32px 0 24px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.25);
}

.app-header h1 {
  font-size: 1.9rem;
  margin-bottom: 8px;
}

.subtitle {
  font-size: 0.95rem;
}

.status-pill {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  margin-left: 4px;
}

.status-meet {
  background-color: #22c55e;
}

.status-late {
  background-color: #f97316;
}

.status-blocked {
  background-color: #ef4444;
}

main {
  padding: 24px 0 32px;
}

.create-section,
.board-section {
  background-color: #ffffff;
  border-radius: 12px;
  padding: 20px 16px 24px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

.create-section h2,
.board-section h2 {
  font-size: 1.4rem;
  margin-bottom: 12px;
}

.assignment-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px 16px;
  margin-bottom: 8px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-row label {
  font-size: 0.9rem;
  font-weight: 600;
  color: #1f2937;
}

.form-row input[type="text"],
.form-row input[type="date"] {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid #cbd5f5;
  font-size: 0.9rem;
}

.checkbox-row {
  grid-column: 1 / -1;
  padding-top: 4px;
}

.checkbox-row label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn.primary {
  background-color: #4f46e5;
  color: #fff;
}

.btn.ghost {
  background-color: #e5e7eb;
  color: #111827;
}

.btn.small {
  padding: 4px 10px;
  font-size: 0.8rem;
}

.btn:hover {
  opacity: 0.9;
}

.note {
  font-size: 0.85rem;
  color: #4b5563;
  margin-top: 6px;
}

.board-toolbar {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
}

.board {
  overflow-x: auto;
}

.assignments-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.assignments-table th,
.assignments-table td {
  padding: 8px 10px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
  vertical-align: middle;
}

.assignments-table th {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #6b7280;
  background-color: #f9fafb;
}

.status-dot {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  display: inline-block;
}

.status-dot.meet {
  background-color: #22c55e;
}

.status-dot.late {
  background-color: #f97316;
}

.status-dot.blocked {
  background-color: #ef4444;
}

.status-label {
  font-size: 0.8rem;
  margin-left: 6px;
  font-weight: 600;
}

.assignment-name {
  font-weight: 600;
}

.project-name {
  color: #4b5563;
}

.date-text {
  font-variant-numeric: tabular-nums;
}

.summary-text {
  font-size: 0.85rem;
}

.summary-on-time {
  color: #16a34a;
}

.summary-late {
  color: #dc2626;
}

.summary-upcoming {
  color: #0f766e;
}

.summary-overdue {
  color: #b91c1c;
}

.actions-cell button {
  font-size: 0.8rem;
  padding: 4px 8px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  margin-right: 4px;
}

.actions-cell .edit-btn {
  background-color: #e0f2fe;
  color: #0369a1;
}

.actions-cell .delete-btn {
  background-color: #fee2e2;
  color: #b91c1c;
}

.empty-state {
  font-size: 0.9rem;
  color: #6b7280;
  text-align: center;
  margin-top: 8px;
}

.app-footer {
  padding: 12px 0 24px;
  text-align: center;
  font-size: 0.85rem;
  color: #6b7280;
}

.back-link {
  text-decoration: underline;
  color: #4f46e5;
}

@media (max-width: 640px) {
  .assignment-form {
    grid-template-columns: 1fr;
  }
}