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

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-tertiary: #1a1a1a;
  --bg-elevated: #222222;
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.5);
  --text-tertiary: rgba(255, 255, 255, 0.3);
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.3);
  --accent-hover: #818cf8;
  --danger: #ef4444;
  --success: #22c55e;
  --border: rgba(255, 255, 255, 0.06);
  --border-subtle: rgba(255, 255, 255, 0.03);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px 16px 120px;
  min-height: 100vh;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 32px;
  padding-top: 40px;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(180deg, #fff 0%, rgba(255,255,255,0.6) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 400;
  margin-top: 6px;
  letter-spacing: 0.2px;
}

/* Filter Bar */
.filter-bar {
  margin-bottom: 20px;
}

.filter-pills {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.filter-pills::-webkit-scrollbar {
  display: none;
}

.filter-btn {
  padding: 8px 16px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.filter-btn:hover {
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--text-primary);
  border-color: var(--text-primary);
  color: var(--bg-primary);
}

/* List */
.list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.list.hidden {
  display: none;
}

.list-item {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--border);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.list-item:hover {
  background: var(--bg-tertiary);
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.list-item.sortable-ghost {
  opacity: 0.3;
}

.list-item.sortable-drag {
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
}

.drag-handle {
  color: var(--text-tertiary);
  margin-right: 14px;
  font-size: 12px;
  cursor: grab;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  padding: 4px;
  margin-left: -4px;
}

.item-icon {
  font-size: 28px;
  margin-right: 14px;
  filter: saturate(0.9);
}

.item-content {
  flex: 1;
  cursor: pointer;
  min-width: 0;
}

.item-content:active {
  opacity: 0.7;
}

.item-title {
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: -0.2px;
}

.item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}

.item-type {
  font-size: 12px;
  color: var(--text-tertiary);
}

.item-type::after {
  content: '·';
  margin-left: 8px;
  color: var(--text-tertiary);
}

.item-person {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}

.item-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.list-item:hover .item-actions {
  opacity: 1;
}

.action-btn {
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all 0.2s ease;
}

.action-btn:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.action-btn.delete:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  position: relative;
}

.empty-state.hidden {
  display: none;
}

.empty-glow {
  position: absolute;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  opacity: 0.5;
}

.empty-icon {
  font-size: 72px;
  display: block;
  margin-bottom: 20px;
  position: relative;
}

.empty-state p {
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 500;
}

.empty-hint {
  display: block;
  margin-top: 8px;
  color: var(--text-tertiary);
  font-size: 13px;
}

/* Floating Action Button */
.fab {
  position: fixed;
  bottom: 32px;
  right: 50%;
  transform: translateX(50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  color: white;
  font-size: 28px;
  cursor: pointer;
  box-shadow: 0 4px 24px var(--accent-glow), 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 100;
}

.fab:hover {
  transform: translateX(50%) scale(1.1);
  box-shadow: 0 6px 32px var(--accent-glow), 0 12px 40px rgba(0, 0, 0, 0.4);
}

.fab:active {
  transform: translateX(50%) scale(0.95);
}

.fab-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 300;
  transition: transform 0.3s ease;
}

.fab.open .fab-icon {
  transform: rotate(45deg);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 1000;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: 24px 24px 0 0;
  padding: 24px;
  width: 100%;
  max-width: 500px;
  border: 1px solid var(--border);
  border-bottom: none;
  transform: translateY(100%);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal.active .modal-content {
  transform: translateY(0);
}

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

.modal-header h2 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

.close-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

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

/* Inputs */
#titleInput, #editInput {
  width: 100%;
  padding: 16px 18px;
  font-size: 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--text-primary);
  outline: none;
  transition: all 0.2s ease;
  font-family: inherit;
}

#titleInput:focus, #editInput:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

#titleInput::placeholder, #editInput::placeholder {
  color: var(--text-tertiary);
}

/* Option Groups */
.option-group {
  margin-top: 20px;
}

.option-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.type-toggle, .person-toggle {
  display: flex;
  gap: 8px;
}

.type-btn, .person-btn {
  flex: 1;
  padding: 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.type-btn:hover, .person-btn:hover {
  background: var(--bg-elevated);
  border-color: rgba(255, 255, 255, 0.1);
}

.type-btn.active {
  background: var(--bg-elevated);
  border-color: var(--accent);
  color: var(--text-primary);
}

.person-btn.active {
  background: var(--bg-elevated);
  border-color: var(--success);
  color: var(--text-primary);
}

/* Add Button */
.add-btn {
  width: 100%;
  padding: 16px;
  margin-top: 24px;
  background: var(--accent);
  border: none;
  border-radius: 14px;
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  letter-spacing: -0.2px;
}

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

.add-btn:active {
  transform: scale(0.98);
}

/* Modal Actions */
.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.cancel-btn, .save-btn {
  flex: 1;
  padding: 14px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.cancel-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

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

.save-btn {
  background: var(--accent);
  border: none;
  color: white;
}

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

/* Toast */
#toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 2000;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

#toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Mobile optimizations */
@media (hover: none) {
  .item-actions {
    opacity: 1;
  }
  
  .list-item:active {
    transform: scale(0.98);
  }
  
  .fab {
    bottom: 24px;
  }
}

/* Tablet and up */
@media (min-width: 600px) {
  .container {
    padding: 40px 24px 140px;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  .modal-content {
    border-radius: 24px;
    margin: auto;
    max-height: 90vh;
    border: 1px solid var(--border);
  }
  
  .modal {
    align-items: center;
    padding: 20px;
  }
  
  .fab {
    bottom: 40px;
  }
}