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

:root {
  --bg-dark: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-hover: rgba(255,255,255,0.08);
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b0;
  --border: #2a2a40;
  --accent: #7b61ff;
  --accent-hover: #6a52d9;
  --accent-light: rgba(123,97,255,0.15);
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-dark);
  min-height: 100vh;
  color: var(--text-primary);
  overflow: hidden;
}

.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 280px;
  background: var(--bg-dark);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
}

.sidebar-header {
  padding: 32px 24px 24px;
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.logo span {
  font-size: 26px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(123,97,255,0.3);
  width: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(123,97,255,0.4);
}

.search-container {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.search-bar {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.3s;
}

.search-bar::placeholder {
  color: var(--text-secondary);
}

.search-bar:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.boards-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
}

.list-header {
  padding: 0 24px 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 1px;
}

.board-count {
  background: var(--bg-dark);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

#boardsListContainer {
  padding: 0 12px;
}

.board-item {
  padding: 14px 18px;
  margin-bottom: 6px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  text-decoration: none;
}

.board-item:hover {
  background: var(--bg-hover);
  transform: translateX(4px);
}

.board-item.active {
  background: var(--accent-light);
  border-left: 4px solid var(--accent);
}

.board-item.active .board-name {
  color: var(--text-primary);
  font-weight: 600;
}

.board-item .board-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 14px;
}

.board-item .board-count {
  background: var(--bg-dark);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.board-item .btn-icon {
  color: var(--text-secondary);
  width: 24px;
  height: 24px;
  padding: 4px;
  border-radius: 8px;
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.board-item .btn-icon:hover {
  background: var(--bg-hover);
  color: var(--accent);
}

.board-item .btn-icon.delete:hover {
  background: rgba(220,53,69,0.15);
  color: #dc3545;
}

.board-item .btn-icon svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.main-content {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg-dark);
  position: relative;
}

.main-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  opacity: 0.5;
}

.lists-container {
  flex: 1;
  padding: 40px;
  overflow-x: auto;
  overflow-y: hidden;
  display: flex;
  gap: 24px;
  min-height: 0;
  align-items: flex-start;
}

.list {
  background: var(--bg-card);
  border-radius: 16px;
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  width: 300px;
  min-width: 300px;
  max-width: 300px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.list:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.list-title {
  font-weight: 600;
  font-size: 15px;
  color: var(--text-primary);
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.3px;
}

.list-title::before {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(123,97,255,0.5);
}

.list-actions {
  display: flex;
  gap: 4px;
}

.list-actions .btn-icon {
  width: 24px;
  height: 24px;
  padding: 4px;
  border-radius: 8px;
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.list-actions .btn-icon:hover {
  background: var(--bg-hover);
  color: var(--accent);
}

.list-actions .btn-icon.delete:hover {
  background: rgba(220,53,69,0.15);
  color: #dc3545;
}

.list-actions .btn-icon svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card-count {
  background: var(--bg-dark);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.list-cards {
  padding: 18px 14px;
  min-height: 60px;
}

.list-cards.drag-over {
  background: var(--accent-light);
  border-radius: 16px;
}

.card {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  cursor: grab;
  transition: all 0.3s;
  border-left: 4px solid var(--text-secondary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
  background: var(--bg-hover);
}

.card.dragging {
  opacity: 0.5;
  cursor: grabbing;
}

.card.priority-alta {
  border-left-color: #dc3545;
}

.card.priority-média {
  border-left-color: #ffc107;
}

.card.priority-baixa {
  border-left-color: #28a745;
}

.card-priority {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 10px;
  padding: 4px 12px;
  border-radius: 6px;
  display: inline-block;
  font-size: 11px;
}

.card.priority-alta .card-priority {
  background: rgba(220,53,69,0.15);
  color: #dc3545;
}

.card.priority-média .card-priority {
  background: rgba(255,193,7,0.15);
  color: #ffc107;
}

.card.priority-baixa .card-priority {
  background: rgba(40,167,69,0.15);
  color: #28a745;
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.card-description {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 10px;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.card-due-date {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.tag {
  background: var(--bg-dark);
  color: var(--text-secondary);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 500;
}

.card-comments-count {
  font-size: 12px;
  color: var(--text-secondary);
}

.card-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 8px;
  opacity: 0;
  transition: opacity 0.3s;
}

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

.btn-card-action {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  width: 24px;
  height: 24px;
  padding: 4px;
  border-radius: 6px;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-card-action:hover {
  background: var(--bg-hover);
  color: var(--accent);
}

.btn-card-action.delete:hover {
  background: rgba(220,53,69,0.15);
  color: #dc3545;
}

.btn-card-action svg {
  width: 16px;
  height: 16px;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.btn-add-list {
  background: var(--bg-dark);
  border: 2px dashed var(--border);
  border-radius: 12px;
  color: var(--text-secondary);
  padding: 14px 16px;
  cursor: pointer;
  width: 100%;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s;
  margin-top: 10px;
}

.btn-add-list:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  color: var(--accent);
}

.empty-state {
  text-align: center;
  padding: 100px 40px;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 96px;
  margin-bottom: 24px;
  opacity: 0.2;
}

.empty-state h2 {
  font-size: 28px;
  margin-bottom: 14px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.empty-state p {
  font-size: 16px;
  margin-bottom: 30px;
  color: var(--text-secondary);
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(8px);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal.show {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 32px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transform: scale(0.95);
  transition: transform 0.3s;
}

.modal.show .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.modal-header h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}

.close-modal {
  background: var(--bg-dark);
  border: none;
  font-size: 28px;
  cursor: pointer;
  color: var(--text-secondary);
  line-height: 1;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  transition: all 0.3s;
}

.close-modal:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-body {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
  font-family: inherit;
  transition: all 0.3s;
  background: var(--bg-dark);
  color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.btn-cancel {
  background: var(--bg-dark);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-cancel:hover {
  background: var(--bg-hover);
  border-color: var(--text-secondary);
}

.btn-submit {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
  border: none;
  padding: 12px 26px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(123,97,255,0.3);
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(123,97,255,0.4);
}

.notification {
  position: fixed;
  top: 40px;
  right: 40px;
  padding: 16px 24px;
  border-radius: 16px;
  color: white;
  font-weight: 600;
  z-index: 2000;
  box-shadow: var(--shadow);
  animation: slideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    height: 64px;
    flex-direction: row;
    align-items: center;
    padding: 0;
  }
  
  .sidebar-header {
    padding: 0 20px;
    flex: 1;
  }
  
  .logo {
    margin-bottom: 0;
  }
  
  .search-container {
    display: none;
  }
  
  .boards-list {
    display: none;
  }
  
  .main-content {
    height: calc(100vh - 64px);
  }
}