:root {
  --bg: #f3f6fb;
  --bg-soft: #eef3fb;
  --fg: #182230;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --warning: #d97706;
  --success: #16a34a;
  --success-hover: #15803d;
  --radius: 8px;
  --gap: 8px;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 16px 36px rgba(15, 23, 42, 0.14);
  --card-bg: #ffffff;
  --card-border: #d8e2f0;
  --header-bg: #f7faff;
  --text-muted: #5f6b7a;
  --text-secondary: #465466;
  font: 16px/1.5 system-ui, sans-serif;
}

[data-theme="dark"] {
  --bg: #1a1a1a;
  --bg-soft: #151515;
  --fg: #e0e0e0;
  --accent: #4a9eff;
  --accent-hover: #3b82f6;
  --danger: #ff6b6b;
  --danger-hover: #ef4444;
  --warning: #ffd93d;
  --success: #51cf66;
  --success-hover: #40c057;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.4);
  --card-bg: #2d2d2d;
  --card-border: #404040;
  --header-bg: #333333;
  --text-muted: #a0a0a0;
  --text-secondary: #b0b0b0;
}

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

body {
  padding: calc(var(--gap) * 2);
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 16%, transparent) 0%, transparent 35%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
  color: var(--fg);
  max-width: 1200px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.3s ease, color 0.3s ease;
}

@media (min-width: 1400px) {
  body {
    max-width: 1400px;
  }
}

@media (min-width: 1600px) {
  body {
    max-width: 1600px;
  }
}

@media (min-width: 1920px) {
  body {
    max-width: 95%;
  }
}

@media (min-width: 2560px) {
  body {
    max-width: 95%;
  }
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: calc(var(--gap) * 3);
  flex-wrap: wrap;
  gap: var(--gap);
  background: color-mix(in srgb, var(--card-bg) 88%, transparent);
  border: 1px solid var(--card-border);
  border-radius: calc(var(--radius) + 4px);
  padding: 12px 14px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(3px);
}

.header-controls {
  display: flex;
  gap: 1rem;
  align-items: center;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
}

.add-list-btn {
  background: var(--success);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
  box-shadow: var(--shadow);
}

.add-list-btn:hover {
  background: var(--success-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.view-toggle-btn {
  background: none;
  color: var(--fg);
  border: none;
  padding: 0.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.view-toggle-btn:hover {
  color: var(--accent);
  transform: scale(1.1);
}

.theme-toggle-btn {
  background: none;
  color: var(--fg);
  border: none;
  padding: 0.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle-btn:hover {
  color: var(--accent);
  transform: scale(1.1);
}

.settings-btn {
  background: none;
  color: var(--fg);
  border: none;
  padding: 0.5rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.settings-btn:hover {
  color: var(--accent);
  transform: scale(1.1);
}

.lists-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  transition: all 0.3s ease;
  flex: 1;
}

.lists-container.column-view {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  align-items: start;
  max-width: none;
}

.lists-container.column-view > .column-wrapper {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (min-width: 1920px) {
  .lists-container.column-view {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 2560px) {
  .lists-container.column-view {
    grid-template-columns: repeat(4, 1fr);
  }
}

.list-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all 0.2s ease;
  overflow: visible;
  width: 100%;
}

.list-card:hover {
  box-shadow: var(--shadow-hover);
}

.list-card.collapsed .list-content {
  display: none !important;
}

.list-card.collapsed {
  overflow: visible;
}

.list-content {
  transition: all 0.3s ease;
}

.list-header {
  background: var(--header-bg);
  padding: 10px calc(var(--gap) * 1.5);
  border-bottom: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 48px;
}

.list-card.collapsed .list-header {
  border-bottom: none;
}

.list-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0;
}

.list-date {
  color: var(--text-muted);
  font-size: 0.82rem;
  flex-shrink: 0;
  white-space: nowrap;
  display: flex;
  align-items: center;
}

.list-countdown {
  font-size: 0.85em;
  font-weight: 600;
  white-space: nowrap;
}

.list-countdown.warning {
  color: var(--warning);
}

.list-countdown.danger {
  color: var(--danger);
}

.list-countdown.due {
  color: var(--danger);
  font-weight: bold;
  animation: pulse 1s infinite;
}

.list-description {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-style: italic;
  line-height: 1.3;
  display: none;
}

.list-card:not(.collapsed) .list-description {
  display: block;
  padding: 0 calc(var(--gap) * 1.5) calc(var(--gap));
}

.list-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.list-collapsed-stats {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.list-collapsed-stat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
}

.list-collapsed-stat svg {
  width: 13px;
  height: 13px;
  opacity: 0.9;
}

.list-collapsed-stat span {
  line-height: 1;
}

.list-card.collapsed .list-collapsed-stat {
  color: var(--text-secondary);
}

.list-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.list-actions-right {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-left: auto;
}

.list-collapse-btn {
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.list-collapse-btn:hover {
  color: var(--fg);
}

.list-collapse-btn .icon {
  width: 20px;
  height: 20px;
  transition: transform 0.2s ease;
}

.list-card.collapsed .list-collapse-btn .icon {
  transform: rotate(180deg);
}

.list-form {
  display: flex;
  gap: var(--gap);
  padding: calc(var(--gap) * 1.5);
  background: var(--header-bg);
  border-bottom: 1px solid var(--card-border);
  flex-wrap: wrap;
  align-items: center;
}

.list-form input {
  flex: 1;
  min-width: 120px;
  padding: 8px 12px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  background: var(--bg);
  color: var(--fg);
}

.time-date-inputs {
  display: flex;
  gap: 8px;
  align-items: center;
}

.time-date-inputs input[type="date"] {
  flex: 0 0 120px;
}

.time-date-inputs input[type="time"] {
  flex: 0 0 80px;
}

.time-toggle-btn {
  padding: 8px;
  background: var(--header-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  color: var(--fg);
}

.time-toggle-btn:hover {
  background: var(--card-bg);
  border-color: var(--text-muted);
}

.time-toggle-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.time-toggle-btn svg {
  pointer-events: none;
}

.list-form button[type="submit"] {
  padding: 8px 16px;
  font-size: 0.9rem;
  min-width: auto;
  height: 36px;
  background: var(--accent);
  color: white;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.list-form button[type="submit"]:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.list-tasks {
  list-style: none;
  padding: 0;
  margin: 0;
}

.list-task-item {
  display: flex;
  align-items: flex-start;
  gap: var(--gap);
  padding: calc(var(--gap) * 1.5);
  border-bottom: 1px solid var(--card-border);
  transition: background 0.2s ease;
  flex-wrap: wrap;
}

.list-task-item > input[type="checkbox"] {
  margin-top: 4px;
  flex-shrink: 0;
}

.list-task-item.task-urgent-warning {
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--warning) 45%, transparent);
  background: color-mix(in srgb, var(--warning) 10%, var(--card-bg));
}

.list-task-item.task-urgent-danger {
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--danger) 45%, transparent);
  background: color-mix(in srgb, var(--danger) 8%, var(--card-bg));
}

.list-task-item:hover {
  background: var(--header-bg);
}

.list-task-item.done {
  background: var(--header-bg);
}

.list-task-item.done .task-title {
  text-decoration: line-through;
  opacity: 0.6;
}

.task-finished-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--success);
  border: 1px solid color-mix(in srgb, var(--success) 45%, transparent);
  border-radius: var(--radius);
  padding: 2px 8px;
}

.list-task-item.done .task-actions {
  margin-left: auto;
}

.list-task-item.done .task-finished-badge {
  margin-left: 4px;
}

.finished-tasks-divider {
  list-style: none;
  padding: 6px 10px 4px;
  border-top: 1px dashed var(--card-border);
  background: color-mix(in srgb, var(--header-bg) 75%, transparent);
}

.finished-toggle-btn {
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 2px;
  cursor: pointer;
  transition: color 0.2s ease;
}

.finished-toggle-btn:hover {
  color: var(--accent);
}

.finished-toggle-chevron {
  font-size: 0.85rem;
  line-height: 1;
  transition: transform 0.2s ease;
}

.finished-toggle-btn.is-collapsed .finished-toggle-chevron {
  transform: rotate(-90deg);
}

.task-text {
  flex: 1;
  font-weight: 500;
}

.task-main {
  flex: 1;
  min-width: 180px;
}

.task-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.task-content.has-body {
  cursor: pointer;
}

.task-content.is-empty-body {
  cursor: default;
}

.task-title {
  font-weight: 600;
  line-height: 1.35;
  word-break: break-word;
}

.task-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.task-detail-marker {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 55%, var(--text-muted));
  opacity: 0.65;
  flex-shrink: 0;
}

.task-body-wrapper {
  display: none;
  flex-basis: 100%;
  min-width: 0;
  padding-left: 28px;
  cursor: pointer;
}

.task-body-wrapper.expanded {
  display: block;
}

.task-body {
  color: var(--text-secondary);
  line-height: 1.45;
  font-size: 0.92rem;
  word-break: break-word;
  padding-top: 4px;
  padding-left: 14px;
  border-left: 2px solid color-mix(in srgb, var(--card-border) 85%, transparent);
}

.task-body p {
  margin: 0 0 6px;
}

.task-body ul {
  margin: 0 0 6px 18px;
  padding: 0;
  list-style-type: disc;
}

.task-body li {
  margin: 0 0 4px;
}

.task-body li::marker {
  color: var(--fg);
}

.task-body ol {
  margin: 0 0 6px 18px;
  padding: 0;
}

.task-body h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 8px 0 4px;
  color: var(--fg);
}

.task-body h3 {
  font-size: 0.98rem;
  font-weight: 600;
  margin: 6px 0 3px;
  color: var(--fg);
}

.task-body a {
  color: var(--accent);
  text-decoration: underline;
  cursor: pointer;
  word-break: break-all;
}

.task-body a:hover {
  color: var(--accent-hover);
}

.task-body hr {
  border: none;
  border-top: 1px solid var(--card-border);
  margin: 8px 0;
}

.task-body code {
  background: color-mix(in srgb, var(--header-bg) 80%, transparent);
  border: 1px solid var(--card-border);
  border-radius: 4px;
  padding: 1px 4px;
  font-size: 0.85em;
}

.task-body-input {
  width: 100%;
  min-height: 64px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--fg);
  padding: 10px 12px;
  font: inherit;
  line-height: 1.45;
  resize: none;
  overflow: hidden;
  margin-left: 2px;
}

.task-body-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 25%, transparent);
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  flex-wrap: wrap;
  margin-top: 2px;
}

.task-time {
  color: var(--text-muted);
  font-size: 0.9rem;
  background: var(--header-bg);
  padding: 2px 8px;
  border-radius: 12px;
  white-space: nowrap;
}

.countdown-timer {
  font-size: 0.9em;
  color: var(--accent);
  font-weight: 600;
  min-width: 60px;
  text-align: center;
  white-space: nowrap;
}

.countdown-timer.warning {
  color: var(--warning);
}

.countdown-timer.danger {
  color: var(--danger);
}

.countdown-timer.final {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.03em;
}

.countdown-timer.due {
  color: var(--danger);
  font-weight: bold;
  animation: pulse 1s infinite;
}

.list-task-item.done .countdown-timer.due {
  animation: none;
}

@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.5; }
  100% { opacity: 1; }
}

.icon {
  width: 22px;
  height: 22px;
  cursor: pointer;
  fill: var(--fg);
  transition: all 0.2s ease;
  padding: 4px;
  border-radius: 4px;
}

.icon:hover {
  background: var(--header-bg);
  transform: scale(1.1);
}

.icon.edit:hover {
  color: var(--accent);
  background: var(--header-bg);
}

.icon.bell:hover {
  color: var(--warning);
  background: var(--header-bg);
}

.icon.trash:hover {
  color: var(--danger);
  background: var(--header-bg);
}

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

.icon.list-collapse:hover {
  color: var(--accent);
  background: var(--header-bg);
  transform: scale(1.1);
}

.icon.list-delete:hover {
  color: var(--danger);
  background: var(--header-bg);
}

.icon-btn {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  background: var(--header-bg);
  transform: scale(1.1);
}

.icon-btn.list-delete:hover {
  color: var(--danger);
  background: var(--header-bg);
}

.icon-btn.list-collapse:hover {
  color: var(--accent);
  background: var(--header-bg);
  transform: scale(1.1);
}

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

/* List menu dropdown styles */
.list-menu-container {
  position: relative;
  display: inline-block;
}

.list-menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 120px;
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
}

.list-menu-container.active .list-menu-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  background: none;
  border: none;
  color: var(--fg);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border-radius: 0;
}

.menu-item:first-child {
  border-radius: var(--radius) var(--radius) 0 0;
}

.menu-item:last-child {
  border-radius: 0 0 var(--radius) var(--radius);
}

.menu-item:hover {
  background: var(--header-bg);
}

.menu-item.list-edit:hover {
  color: var(--accent);
}

.menu-item.list-delete:hover {
  color: var(--danger);
}

.menu-item .icon {
  width: 16px;
  height: 16px;
  padding: 0;
}

/* Task menu dropdown styles */
.task-menu-container {
  position: relative;
  display: inline-block;
}

.task-menu-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 140px;
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
}

.task-menu-container.active .task-menu-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.task-menu-dropdown .menu-item.task-edit:hover {
  color: var(--accent);
}

.task-menu-dropdown .menu-item.task-reminder:hover {
  color: var(--warning);
}

.task-menu-dropdown .menu-item.task-delete:hover {
  color: var(--danger);
}

/* Drag and drop styles */
.list-card.dragging {
  opacity: 0.5;
  transform: rotate(2deg);
}

.list-card.drag-over-top {
  border-top: 3px solid var(--accent);
}

.list-card.drag-over-bottom {
  border-bottom: 3px solid var(--accent);
}

.list-task-item.dragging {
  opacity: 0.5;
  background: rgba(0,102,255,0.1);
}

.list-task-item.drag-over-top {
  border-top: 2px solid var(--accent);
}

.list-task-item.drag-over-bottom {
  border-bottom: 2px solid var(--accent);
}

.empty-list.drag-over {
  background-color: #e3f2fd;
  border: 2px dashed #007bff;
  color: #007bff;
}

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

.list-task-item[draggable="true"]:active {
  cursor: grabbing;
}

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

.list-card[draggable="true"]:active {
  cursor: grabbing;
}

.touch-drag-clone {
  pointer-events: none !important;
  box-sizing: border-box;
}

.task-actions {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.empty-list {
  text-align: center;
  color: var(--text-muted);
  padding: calc(var(--gap) * 3);
  font-style: italic;
}

/* Modal styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.5);
  animation: fadeIn 0.3s ease;
}

.modal-content {
  background-color: var(--card-bg);
  margin: 15% auto;
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  max-width: 400px;
  width: 90%;
  position: relative;
  animation: slideIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideIn {
  from { transform: translateY(-50px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.close {
  color: var(--text-muted);
  float: right;
  font-size: 28px;
  font-weight: bold;
  cursor: pointer;
  line-height: 20px;
}

.close:hover {
  color: var(--fg);
}

.modal-btn {
  background: var(--accent);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius);
  cursor: pointer;
  margin-top: 10px;
}

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

.modal-buttons {
  display: flex;
  gap: 10px;
  margin-top: 15px;
  justify-content: flex-end;
}

/* Modal form styling */
.modal form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 20px;
}

.modal h2 {
  margin: 0 0 15px 0;
  color: var(--fg);
  font-size: 1.5rem;
}

.modal form input,
.modal form textarea {
  padding: 12px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: border-color 0.2s ease;
  font-family: inherit;
  background: var(--bg);
  color: var(--fg);
}

.modal form input:focus,
.modal form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0, 102, 255, 0.2);
}

.modal form textarea {
  resize: vertical;
  min-height: 80px;
}

.modal form button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.modal form button:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 35%, transparent);
}

.modal-time-controls {
  display: flex;
  align-items: center;
  gap: var(--gap);
  margin: var(--gap) 0;
}

.modal-time-inputs {
  display: flex;
  gap: 8px;
  align-items: center;
}

.modal-time-inputs input {
  padding: 8px 12px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
  background: var(--bg);
  color: var(--fg);
}

.modal-time-inputs input[type="time"] {
  width: 120px;
}

.modal-time-inputs input[type="date"] {
  width: 140px;
}

.settings-section {
  margin: 20px 0;
}

.settings-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.settings-tab-btn {
  background: var(--header-bg);
  border: 1px solid var(--card-border);
  color: var(--fg);
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 600;
}

.settings-tab-btn:hover {
  border-color: var(--accent);
}

.settings-tab-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.settings-tab-panel {
  display: none;
}

.settings-tab-panel.active {
  display: block;
}

.settings-form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.settings-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.settings-select {
  width: 100%;
  border: 1px solid var(--card-border);
  background: var(--bg);
  color: var(--fg);
  border-radius: var(--radius);
  padding: 10px 12px;
  cursor: pointer;
}

.settings-section h3 {
  margin: 0 0 15px 0;
  font-size: 1.2rem;
  color: var(--fg);
}

.settings-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.export-btn, .import-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 0.95rem;
  min-width: 140px;
  justify-content: center;
}

.export-btn {
  background: var(--success);
}

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

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

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

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  min-width: 300px;
  max-width: 400px;
  pointer-events: auto;
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.success {
  border-left: 4px solid var(--success);
}

.toast.error {
  border-left: 4px solid var(--danger);
}

.toast.warning {
  border-left: 4px solid var(--warning);
}

.toast.info {
  border-left: 4px solid var(--accent);
}

.toast-content {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.toast-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.toast-icon.success {
  color: var(--success);
}

.toast-icon.error {
  color: var(--danger);
}

.toast-icon.warning {
  color: var(--warning);
}

.toast-icon.info {
  color: var(--accent);
}

.toast-message {
  flex: 1;
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--fg);
}

.toast-close {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 3px;
  transition: all 0.2s ease;
}

.toast-close:hover {
  background: var(--header-bg);
  color: var(--fg);
}

.toast.confirmation {
  min-width: 350px;
}

.toast-actions {
  display: flex;
  gap: 8px;
  margin-top: 12px;
  justify-content: flex-end;
}

.toast-btn {
  padding: 6px 16px;
  border: none;
  border-radius: 4px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.toast-btn.cancel {
  background: var(--header-bg);
  color: var(--fg);
  border: 1px solid var(--card-border);
}

.toast-btn.cancel:hover {
  background: var(--card-border);
}

.toast-btn.confirm {
  background: var(--danger);
  color: white;
}

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

.app-footer {
  margin-top: auto;
  padding-top: 10px;
  text-align: center;
}

.app-version {
  font-size: 0.65rem;
  color: var(--text-muted);
  opacity: 0.8;
  letter-spacing: 0.04em;
}

@media (max-width: 768px) {
  .toast-container {
    top: 10px;
    right: 10px;
    left: 10px;
  }

  .toast {
    min-width: auto;
    max-width: none;
  }

  body {
    padding: var(--gap);
  }

  header {
    margin-bottom: calc(var(--gap) * 2);
    gap: calc(var(--gap) * 0.5);
  }

  h1 {
    font-size: 1.5rem;
  }

  .header-controls {
    gap: 0.5rem;
  }

  .view-toggle-btn,
  .theme-toggle-btn,
  .settings-btn {
    padding: 0.4rem;
  }

  .view-toggle-btn svg,
  .theme-toggle-btn svg,
  .settings-btn svg {
    width: 18px;
    height: 18px;
  }

  .add-list-btn {
    padding: 8px 16px;
    font-size: 0.9rem;
  }

  .lists-container,
  .lists-container.column-view {
    display: flex;
    flex-direction: column;
    grid-template-columns: unset;
  }

  .view-toggle-btn {
    display: none;
  }

  .list-form {
    gap: 4px;
    padding: calc(var(--gap) * 1);
  }

  .list-form input {
    min-width: 80px;
    font-size: 0.85rem;
    padding: 6px 8px;
  }

  .time-toggle-btn {
    min-width: 32px;
    height: 32px;
    padding: 6px;
  }

  .list-form button[type="submit"] {
    padding: 6px 12px;
    font-size: 0.85rem;
    min-width: 32px;
    height: 32px;
  }

  .modal-time-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .modal-time-inputs {
    justify-content: center;
  }
}