/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #f8f7f4;
  --color-surface: #ffffff;
  --color-text: #2c2c2e;
  --color-text-secondary: #8e8e93;
  --color-primary: #5856d6;
  --color-primary-hover: #4a48c4;
  --color-primary-light: rgba(88,86,214,0.08);
  --color-danger: #e3002b;
  --color-danger-hover: #c00024;
  --color-border: #e0deda;
  --color-border-light: #eae8e4;
  --color-green: #34a853;
  --color-green-bg: #eef7f0;
  --color-yellow: #c07d10;
  --color-yellow-bg: #fdf6e8;
  --color-pill-bg: #eeecf9;
  --color-pill-text: #5856d6;
  --color-madeline: #5856d6;
  --color-michelle: #0ea5a0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.1), 0 2px 8px rgba(0,0,0,0.04);
  --transition: 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* App Container */
.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
  display: none; /* hidden until user is picked */
}

.app.ready {
  display: block;
}

/* Header */
.header {
  text-align: center;
  padding: 28px 0 8px;
}

.header h1 {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-primary);
}

.header-user {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.header-user a {
  color: var(--color-primary);
  text-decoration: none;
  cursor: pointer;
}

.header-user a:hover {
  text-decoration: underline;
}

/* User Picker Overlay */
.user-picker-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-picker-overlay.hidden {
  display: none;
}

.user-picker {
  text-align: center;
  padding: 32px;
}

.user-picker h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}

.user-picker p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.user-picker-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.user-picker-btn {
  padding: 14px 32px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  min-width: 140px;
}

.user-picker-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.user-picker-btn.madeline {
  color: var(--color-madeline);
  border-color: var(--color-madeline);
}

.user-picker-btn.madeline:hover {
  background: rgba(88,86,214,0.06);
}

.user-picker-btn.michelle {
  color: var(--color-michelle);
  border-color: var(--color-michelle);
}

.user-picker-btn.michelle:hover {
  background: rgba(14,165,160,0.06);
}

/* Week Selector */
.week-selector {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 0 16px;
}

.week-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  min-width: 200px;
  text-align: center;
}

.cal-link {
  font-size: 1.1rem;
  text-decoration: none;
  opacity: 0.5;
  transition: opacity var(--transition);
}

.cal-link:hover {
  opacity: 1;
}

.week-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  cursor: pointer;
  font-size: 1rem;
  color: var(--color-text-secondary);
  transition: all var(--transition);
}

.week-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.view-all-toggle {
  display: block;
  margin: -8px auto 12px;
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 2px 8px;
}

.view-all-toggle:hover {
  text-decoration: underline;
}

/* Add Form */
.add-form {
  background: var(--color-surface);
  padding: 16px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  border: 1px solid var(--color-border-light);
}

.add-form input[type="text"] {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.add-form input[type="text"]::placeholder {
  color: var(--color-text-secondary);
}

.add-form input[type="text"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(88,86,214,0.15);
}

.add-form-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.add-form-row input {
  flex: 1;
}

/* Buttons */
.btn {
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform 0.1s;
  white-space: nowrap;
  min-height: 44px;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 1px 3px rgba(88,86,214,0.3);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 2px 6px rgba(88,86,214,0.35);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

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

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

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

/* Section Titles */
.section-title {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Item List */
.item-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.topic-group {
  margin-bottom: 14px;
}

.topic-group-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  padding: 8px 14px 4px;
  margin-bottom: 2px;
  opacity: 0.7;
}

/* Item Row */
.item-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  transition: background var(--transition), box-shadow var(--transition);
  min-height: 44px;
  border: 1px solid transparent;
}

.item-row:hover {
  background: var(--color-surface);
  border-color: var(--color-border-light);
  box-shadow: var(--shadow);
}

.item-row.covered {
  opacity: 0.6;
}

.item-row.covered .item-text {
  text-decoration: line-through;
}

/* Custom Checkbox */
.item-check {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  cursor: pointer;
  flex-shrink: 0;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  transition: all 0.15s ease;
  position: relative;
}

.item-check:hover {
  border-color: var(--color-primary);
}

.item-check:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.item-check:checked::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 2px;
  width: 5px;
  height: 9px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

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

.item-text {
  font-size: 0.95rem;
  word-wrap: break-word;
}

.item-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 3px;
  flex-wrap: wrap;
}

.topic-pill {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 99px;
  background: var(--color-pill-bg);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-pill-text);
  letter-spacing: 0.01em;
}

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

/* Author Badge */
.author-badge {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 99px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.author-badge.madeline {
  background: rgba(88,86,214,0.1);
  color: var(--color-madeline);
}

.author-badge.michelle {
  background: rgba(14,165,160,0.1);
  color: var(--color-michelle);
}

/* Carry-forward indicator */
.carried-badge {
  font-size: 0.68rem;
  color: var(--color-yellow);
  font-style: italic;
}

/* Reactions */
.reaction-bar {
  display: flex;
  gap: 4px;
  margin-top: 5px;
}

.reaction-btn {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px;
  border: 1.5px solid var(--color-border-light);
  border-radius: 99px;
  background: var(--color-surface);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.15s ease;
  line-height: 1;
}

.reaction-btn:hover {
  border-color: var(--color-border);
  background: var(--color-bg);
}

.reaction-btn.active {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.reaction-count {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.reaction-btn.active .reaction-count {
  color: var(--color-primary);
}

/* Item Actions */
.item-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.item-row:hover .item-actions,
.item-row:focus-within .item-actions {
  opacity: 1;
}

.icon-btn {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: 50%;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  transition: background var(--transition), color var(--transition);
  position: relative;
}

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

.icon-btn.delete:hover {
  background: rgba(227,0,43,0.08);
  color: var(--color-danger);
}

.comment-count {
  position: absolute;
  top: -2px;
  right: -2px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Inline Edit */
.item-row.editing {
  flex-wrap: wrap;
}

.item-row.editing .item-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-basis: 100%;
}

.inline-edit-input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: #fff;
}

.inline-edit-input:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(88,86,214,0.15);
}

.inline-edit-actions {
  display: flex;
  gap: 6px;
}

.inline-edit-actions .btn {
  padding: 4px 12px;
  min-height: 32px;
  font-size: 0.8rem;
}

/* Comment Thread */
.comment-thread {
  padding: 8px 14px 12px 44px;
  border-left: 3px solid var(--color-border-light);
  margin-left: 24px;
  margin-bottom: 4px;
  display: none;
}

.comment-thread.open {
  display: block;
}

.comment-bubble {
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.comment-bubble:last-of-type {
  border-bottom: none;
}

.comment-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 2px;
}

.comment-time {
  font-size: 0.7rem;
  color: var(--color-text-secondary);
}

.comment-text {
  font-size: 0.88rem;
  color: var(--color-text);
  line-height: 1.4;
}

.comment-input-row {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}

.comment-input {
  flex: 1;
  padding: 6px 10px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-family: inherit;
  background: var(--color-bg);
}

.comment-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(88,86,214,0.15);
}

.comment-send-btn {
  padding: 6px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: 40px 16px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-style: italic;
}

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

/* History Section */
.history-section {
  margin-top: 28px;
  padding-top: 16px;
}

.history-section > summary {
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.history-section > summary::-webkit-details-marker {
  display: none;
}

.history-section > summary::before {
  content: "\25B6";
  font-size: 0.7rem;
  transition: transform var(--transition);
}

.history-section[open] > summary::before {
  transform: rotate(90deg);
}

/* Loading */
.loading-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--color-primary);
  transition: width 0.3s;
  z-index: 400;
}

.sync-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-green);
  margin-left: 6px;
  vertical-align: middle;
  transition: background var(--transition);
}

.sync-indicator.syncing {
  background: var(--color-yellow);
}

.sync-indicator.error {
  background: var(--color-danger);
}

/* Delete Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.25);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
  padding: 16px;
}

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

.modal {
  background: var(--color-surface);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  transform: translateY(10px) scale(0.98);
  transition: transform 0.25s ease;
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

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

.modal-header h2 {
  font-size: 1.1rem;
  font-weight: 700;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  font-size: 1.4rem;
  cursor: pointer;
  border-radius: 50%;
  color: var(--color-text-secondary);
  transition: background var(--transition);
}

.modal-close:hover {
  background: var(--color-border-light);
}

.modal-body {
  padding: 20px;
}

.delete-preview {
  font-style: italic;
  color: var(--color-text-secondary);
  margin-top: 8px;
  word-break: break-word;
}

.modal-actions {
  display: flex;
  gap: 8px;
  padding: 16px 20px;
  border-top: 1px solid var(--color-border-light);
  justify-content: flex-end;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-text);
  color: #fff;
  padding: 10px 20px;
  border-radius: 99px;
  font-size: 0.85rem;
  font-weight: 500;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, transform 0.3s, visibility 0.3s;
  z-index: 200;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

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

/* Mobile */
@media (max-width: 480px) {
  .app {
    padding: 10px;
  }

  .header h1 {
    font-size: 1.4rem;
  }

  .user-picker-buttons {
    flex-direction: column;
  }

  .modal {
    border-radius: 0;
  }

  .modal-overlay {
    padding: 0;
  }

  .item-actions {
    opacity: 1;
  }

  .comment-thread {
    margin-left: 10px;
    padding-left: 12px;
  }
}

/* Focus outlines */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Animation */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.item-row.new {
  animation: slideIn 0.25s ease;
}