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

:root {
  --bg: #F7F8FA;
  --surface: #FFFFFF;
  --card: #FFFFFF;
  --card-hover: #F5F5F5;
  --border: #E8E8E8;
  --text: #111111;
  --text-sub: #555555;
  --text-muted: #AAAAAA;
  --nav-bg: #111111;
  --nav-text: rgba(255,255,255,0.5);
  --nav-active: #FFFFFF;
  --overdue: #DC2626;
  --upcoming: #F59E0B;
  --done: #16A34A;
  --priority-high: #DC2626;
  --priority-medium: #3B82F6;
  --priority-low: #94A3B8;
  --accent: #111111;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06);
  --transition: 0.18s ease;
}

html { font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  /* iOS safe area */
  padding-top: env(safe-area-inset-top);
}

#app { min-height: 100vh; }

/* ─── Typography ────────────────────────────────────────────── */
h1 { font-size: 1.75rem; font-weight: 700; }
h2 { font-size: 1.25rem; font-weight: 600; }
h3 { font-size: 1rem; font-weight: 600; }

/* ─── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ─── Layout ────────────────────────────────────────────────── */
.app-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding: 20px 16px 170px;
  max-width: 768px;
  margin: 0 auto;
  width: 100%;
}

/* ─── Top Bar ───────────────────────────────────────────────── */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: #111111;
  border-bottom: none;
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-bar .logo {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: #FFFFFF;
}

.top-bar .logo span { color: rgba(255,255,255,0.4); }

.top-bar .user-avatar {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  color: #FFFFFF;
  transition: var(--transition);
}
.top-bar .user-avatar:hover { background: rgba(255,255,255,0.2); }

/* ─── Bottom Navigation ─────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: #111111;
  border-top: none;
  display: flex;
  padding: 10px 0 calc(env(safe-area-inset-bottom, 0px) + 8px);
  z-index: 100;
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 0;
  cursor: pointer;
  transition: var(--transition);
  color: rgba(255,255,255,0.38);
  font-size: 0.625rem;
  font-weight: 500;
  border: none;
  background: none;
  letter-spacing: 0.2px;
}
.nav-item i { font-size: 1.15rem; }
.nav-item.active { color: #FFFFFF; }
.nav-item:hover { color: rgba(255,255,255,0.7); }

/* ─── Cards ─────────────────────────────────────────────────── */
.card {
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.card-sm {
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius-sm);
  padding: 16px;
}

/* ─── Overview Cards ─────────────────────────────────────────── */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.overview-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  cursor: default;
  box-shadow: var(--shadow-sm);
}

.overview-card .count {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}

.overview-card .label {
  font-size: 0.6875rem;
  color: var(--text-sub);
  font-weight: 500;
}

.overview-card.overdue .count { color: var(--overdue); }
.overview-card.upcoming .count { color: var(--upcoming); }
.overview-card.done .count { color: var(--done); }

/* ─── Filter Tabs ─────────────────────────────────────────── */
.filter-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 16px;
  scrollbar-width: none;
}
.filter-row::-webkit-scrollbar { display: none; }

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-sub);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.filter-btn:hover { border-color: #AAAAAA; color: var(--text); }
.filter-btn.active {
  background: #111111;
  color: #FFFFFF;
  border-color: #111111;
}

/* ─── View Toggle ─────────────────────────────────────────── */
.view-toggle {
  display: flex;
  gap: 4px;
  margin-left: auto;
  flex-shrink: 0;
}
.view-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.875rem;
}
.view-btn.active { background: #111111; color: #FFFFFF; border-color: #111111; }

/* ─── Task Cards ─────────────────────────────────────────────── */
.tasks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.tasks-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.task-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 16px 16px 20px;   /* extra left for side stripe */
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.task-card:hover {
  border-color: #CCCCCC;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.10);
}

.task-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 4px;
  border-radius: 16px 0 0 16px;
  background: var(--border);
}
.task-card.priority-high::before  { background: var(--priority-high); }
.task-card.priority-medium::before { background: var(--priority-medium); }
.task-card.priority-low::before   { background: var(--priority-low); }

/* Overdue card gets a faint red tint */
.task-card.overdue-card {
  background: #FFF5F5;
  border-color: rgba(220,38,38,0.18);
}

.task-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}

.task-title {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  flex: 1;
  word-break: break-word;
}
.task-card.done-task .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.priority-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 4px;
}
.priority-dot.high   { background: var(--priority-high); }
.priority-dot.medium { background: var(--priority-medium); }
.priority-dot.low    { background: var(--priority-low); }

.task-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

/* List view task card */
.task-card.list-card {
  flex-direction: row;
  align-items: center;
  gap: 14px;
  padding: 14px 16px 14px 20px;
}

.task-card.list-card .task-card-body {
  flex: 1;
  min-width: 0;
}
.task-card.list-card .task-card-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  flex-shrink: 0;
}

/* ─── Tags / Badges ──────────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.tag-category {
  background: #F3F4F6;
  color: #555555;
  border: 1px solid #E5E5E5;
}

.tag-status {
  border: 1px solid transparent;
}
.tag-status.pending {
  background: #F3F4F6;
  color: #666666;
  border-color: #E5E5E5;
}
.tag-status.in_progress {
  background: #EEF2FF;
  color: #4338CA;
  border-color: #C7D2FE;
}
.tag-status.done {
  background: #DCFCE7;
  color: #15803D;
  border-color: #BBF7D0;
}

/* ─── Due Date ──────────────────────────────────────────────── */
.due-date {
  font-size: 0.75rem;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 4px;
}
.due-date.overdue  { color: var(--overdue); font-weight: 700; }
.due-date.upcoming { color: var(--upcoming); font-weight: 600; }

/* ─── Progress Bar ──────────────────────────────────────────── */
.progress-wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.progress-bar {
  height: 3px;
  background: #E5E5E5;
  border-radius: 999px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 999px;
  background: #111111;
  transition: width 0.4s ease;
}
.progress-fill.done { background: var(--done); }
.progress-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-align: right;
}

/* ─── Quick Add ──────────────────────────────────────────────── */
.quick-add-bar {
  position: fixed;
  bottom: calc(60px + env(safe-area-inset-bottom, 0px));
  left: 0; right: 0;
  padding: 0 14px 8px;
  z-index: 101;
  pointer-events: none;
}

.quick-add-inner {
  max-width: 768px;
  margin: 0 auto;
  pointer-events: all;
}

.quick-add-form {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius);
  padding: 10px 14px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  backdrop-filter: blur(12px);
}

.quick-add-form input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: #111111;
  font-size: 0.9375rem;
}
.quick-add-form input::placeholder { color: #AAAAAA; }

.quick-add-form button {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: #111111;
  color: #FFFFFF;
  border: none;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.875rem;
  flex-shrink: 0;
  transition: var(--transition);
}
.quick-add-form button:hover { opacity: 0.8; }

.quick-add-options {
  display: none;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  margin-top: 6px;
  gap: 10px;
  box-shadow: var(--shadow);
}
.quick-add-options.open { display: flex; flex-wrap: wrap; }

.quick-opt-label { font-size: 0.75rem; color: var(--text-sub); width: 100%; }

/* ─── Auth Page ──────────────────────────────────────────────── */
.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: #F7F8FA;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: #FFFFFF;
  border: 1px solid #E8E8E8;
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.09);
}

.auth-logo {
  text-align: center;
  margin-bottom: 28px;
}
.auth-logo h1 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -1px;
  color: #111111;
}
.auth-logo p { color: #999999; font-size: 0.875rem; margin-top: 4px; }

/* ─── Form Elements ──────────────────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-group label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-sub);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: #F9FAFB;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: #111111;
  font-size: 0.9375rem;
  outline: none;
  transition: var(--transition);
  width: 100%;
  font-family: inherit;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: #999999;
  background: #FFFFFF;
}
.form-group select option { background: #FFFFFF; }
.form-group textarea { resize: vertical; min-height: 80px; }

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: #111111;
  color: #FFFFFF;
  width: 100%;
}
.btn-primary:hover { background: #333333; }

.btn-secondary {
  background: #F3F4F6;
  color: #555555;
  border: 1px solid #E5E5E5;
}
.btn-secondary:hover { border-color: #AAAAAA; color: #111111; background: #EBEBEB; }

.btn-danger {
  background: rgba(255,68,68,0.1);
  color: var(--overdue);
  border: 1px solid rgba(255,68,68,0.3);
}
.btn-danger:hover { background: rgba(255,68,68,0.2); }

.btn-sm {
  padding: 6px 14px;
  font-size: 0.8125rem;
}

.btn-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: #F3F4F6;
  border: 1px solid #E5E5E5;
  color: #666666;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
}
.btn-icon:hover { border-color: #AAAAAA; color: #111111; background: #EBEBEB; }

/* ─── Auth Tab Toggle ────────────────────────────────────────── */
.auth-tabs {
  display: flex;
  background: #F3F4F6;
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1;
  text-align: center;
  padding: 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  color: #888888;
  transition: var(--transition);
  border: none;
  background: transparent;
}
.auth-tab.active {
  background: #FFFFFF;
  color: #111111;
}

/* ─── Section Header ─────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.section-title { font-size: 1rem; font-weight: 700; }

/* ─── Modal ──────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal-sheet {
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius) var(--radius) 0 0;
  width: 100%;
  max-width: 768px;
  max-height: 92vh;
  overflow-y: auto;
  padding: 24px 20px 32px;
  transform: translateY(40px);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.modal-overlay.open .modal-sheet {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.modal-title { font-size: 1.1rem; font-weight: 700; }

.modal-close {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: #F3F4F6;
  border: 1px solid #E5E5E5;
  color: #666666;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}
.modal-close:hover { color: #111111; background: #EBEBEB; }

/* ─── Task Detail Page ───────────────────────────────────────── */
.task-detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}
.back-btn {
  width: 36px; height: 36px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: #F3F4F6;
  border: 1px solid #E5E5E5;
  color: #666666;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}
.back-btn:hover { color: #111111; background: #EBEBEB; }

.task-detail-card {
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
}

.detail-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.detail-row:last-child { border-bottom: none; }

.detail-label {
  font-size: 0.8125rem;
  color: var(--text-sub);
  width: 80px;
  flex-shrink: 0;
  padding-top: 2px;
}
.detail-value { flex: 1; font-size: 0.9375rem; }

/* ─── Progress Slider ────────────────────────────────────────── */
.progress-slider-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}
.progress-slider {
  -webkit-appearance: none;
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: #E5E5E5;
  outline: none;
}
.progress-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #111111;
  cursor: pointer;
  border: 2px solid #FFFFFF;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.progress-num { font-size: 0.875rem; color: var(--text-sub); width: 36px; text-align: right; }

/* ─── Calendar ───────────────────────────────────────────────── */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.cal-nav {
  display: flex; align-items: center; gap: 8px;
}
.cal-nav button {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  color: #666666;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.875rem;
  transition: var(--transition);
}
.cal-nav button:hover { color: #111111; background: #F3F4F6; }

.cal-title { font-size: 1.05rem; font-weight: 700; color: #111111; }

.cal-view-toggle {
  display: flex;
  background: #F3F4F6;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 2px;
}
.cal-view-btn {
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: transparent;
  color: #888888;
  transition: var(--transition);
}
.cal-view-btn.active { background: #111111; color: #FFFFFF; }

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  margin-bottom: 16px;
}

.cal-weekday {
  text-align: center;
  font-size: 0.6875rem;
  color: #888888;
  font-weight: 600;
  padding: 8px 0 6px;
}

.cal-day {
  background: #FFFFFF;
  border: 1px solid #EEEEEE;
  border-radius: 10px;
  padding: 8px;
  min-height: 72px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}
.cal-day:hover { border-color: #AAAAAA; }
.cal-day.today {
  border-color: #111111;
  background: #FAFAFA;
}
.cal-day.today .cal-day-num {
  background: #111111;
  color: #FFFFFF;
  border-radius: 50%;
  width: 22px; height: 22px;
  display: flex; align-items: center; justify-content: center;
}
.cal-day.other-month { opacity: 0.35; }
.cal-day-num {
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.cal-task-dot {
  font-size: 0.6rem;
  padding: 2px 5px;
  border-radius: 4px;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  background: #F0F0F0;
  color: #555555;
  cursor: pointer;
}
.cal-task-dot.priority-high   { background: rgba(220,38,38,0.12);  color: var(--priority-high); }
.cal-task-dot.priority-medium { background: rgba(59,130,246,0.12);  color: var(--priority-medium); }
.cal-task-dot.priority-low    { background: rgba(148,163,184,0.12); color: var(--priority-low); }

/* Calendar event pill (colored) */
.cal-event-pill {
  font-size: 0.6rem;
  padding: 2px 5px;
  border-radius: 4px;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: #FFFFFF;
  cursor: pointer;
  font-weight: 600;
}
.cal-more {
  font-size: 0.6rem;
  color: var(--text-muted);
  text-align: right;
  padding-top: 1px;
}

/* Upcoming events below calendar */
.upcoming-event-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: #FFFFFF;
  border-radius: 12px;
  margin-bottom: 8px;
  border: 1px solid #EEEEEE;
  cursor: pointer;
  transition: var(--transition);
}
.upcoming-event-item:hover { border-color: #AAAAAA; box-shadow: var(--shadow-sm); }
.upcoming-event-color {
  width: 4px;
  height: 36px;
  border-radius: 4px;
  flex-shrink: 0;
}
.upcoming-event-body { flex: 1; }
.upcoming-event-title { font-size: 0.9rem; font-weight: 600; color: var(--text); }
.upcoming-event-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 3px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.upcoming-today-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: #111111;
  color: #FFFFFF;
  padding: 2px 8px;
  border-radius: 20px;
  flex-shrink: 0;
}

/* Day detail modal items */
.day-detail-event {
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 8px;
  background: #FAFAFA;
  cursor: pointer;
  transition: var(--transition);
}
.day-detail-event:hover { background: #F0F0F0; }
.day-detail-task {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 6px;
  background: #FAFAFA;
  border: 1px solid #EEEEEE;
  cursor: pointer;
  transition: var(--transition);
}
.day-detail-task:hover { background: #F0F0F0; }

/* Week view event item */
.week-event-item {
  font-size: 0.6875rem;
  padding: 5px 7px;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.3;
}
.week-event-item:hover { opacity: 0.8; }

/* Week view */
.week-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}
.week-day-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.week-day-header {
  text-align: center;
  padding: 8px 4px;
}
.week-day-name {
  font-size: 0.625rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}
.week-day-num {
  font-size: 1rem;
  font-weight: 700;
  margin-top: 2px;
}
.week-day-col.today .week-day-num {
  background: var(--text);
  color: var(--bg);
  border-radius: 50%;
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  margin: 2px auto 0;
}

.week-task-item {
  font-size: 0.6875rem;
  padding: 6px 8px;
  border-radius: 8px;
  background: #FFFFFF;
  border: 1px solid #EEEEEE;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.3;
}
.week-task-item:hover { border-color: #AAAAAA; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.week-task-item.priority-high   { border-color: rgba(220,38,38,0.35); }
.week-task-item.priority-medium { border-color: rgba(59,130,246,0.3); }

/* ─── Settings Page ──────────────────────────────────────────── */
.settings-section {
  margin-bottom: 24px;
}

.settings-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
  gap: 12px;
  box-shadow: var(--shadow-sm);
}
.settings-row-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}
.settings-row-icon {
  width: 36px; height: 36px;
  background: #F3F4F6;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #666666;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.settings-row-text { flex: 1; }
.settings-row-title { font-size: 0.9375rem; font-weight: 500; }
.settings-row-sub { font-size: 0.8125rem; color: var(--text-sub); margin-top: 2px; }

/* ─── Toggle Switch ──────────────────────────────────────────── */
.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: #DDDDDD;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  left: 3px; top: 3px;
  border-radius: 50%;
  background: #FFFFFF;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
  transition: var(--transition);
}
.toggle input:checked + .toggle-slider { background: #111111; }
.toggle input:checked + .toggle-slider::before {
  transform: translateX(20px);
  background: #FFFFFF;
}

/* ─── Category Tree ──────────────────────────────────────────── */
.cat-tree-node {
  position: relative;
}
.cat-tree-node + .cat-tree-node {
  margin-top: 4px;
}
.cat-tree-node .cat-tree-node {
  border-left: 2px solid #E5E5E5;
  margin-top: 4px;
  padding-left: 4px;
}
.cat-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: #FAFAFA;
  border: 1px solid #E8E8E8;
  border-radius: var(--radius-sm);
  margin-bottom: 2px;
  transition: var(--transition);
}
.cat-item:hover { background: #F0F0F0; }
.cat-item-left { display: flex; align-items: center; gap: 8px; flex: 1; min-width: 0; }
.cat-item-name { font-size: 0.9rem; font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cat-item-sub { font-size: 0.75rem; color: var(--text-muted); }

.btn-icon-sm {
  width: 26px; height: 26px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  transition: var(--transition);
}
.btn-icon-sm:hover {
  background: rgba(17,17,17,0.08);
  color: #111111;
  border-color: #E5E5E5;
}

.cat-delete-btn {
  width: 26px; height: 26px;
  border-radius: 6px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  transition: var(--transition);
}
.cat-delete-btn:hover {
  background: rgba(220,38,38,0.08);
  color: var(--overdue);
  border-color: rgba(220,38,38,0.25);
}

/* ─── Toast Notification ─────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  color: #111111;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toast.success { border-color: #BBF7D0; }
.toast.error { border-color: #FECACA; }
.toast.warning { border-color: #FDE68A; }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; pointer-events: none; }
}

/* ─── Empty State ────────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-muted);
  text-align: center;
  gap: 12px;
}
.empty-state i { font-size: 2.5rem; opacity: 0.4; }
.empty-state h3 { font-size: 1rem; color: var(--text-sub); }
.empty-state p { font-size: 0.875rem; }

/* ─── Loading ────────────────────────────────────────────────── */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  color: var(--text-muted);
  gap: 8px;
  font-size: 0.875rem;
}
.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--text-sub);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Priority Selector ──────────────────────────────────────── */
.priority-selector {
  display: flex;
  gap: 8px;
}
.priority-opt {
  flex: 1;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid #E5E5E5;
  background: #F9FAFB;
  color: #666666;
  cursor: pointer;
  font-size: 0.8125rem;
  text-align: center;
  transition: var(--transition);
}
.priority-opt.selected.high   { background: rgba(220,38,38,0.1);   color: var(--priority-high);   border-color: rgba(220,38,38,0.4); }
.priority-opt.selected.medium { background: rgba(59,130,246,0.1);  color: var(--priority-medium); border-color: rgba(59,130,246,0.4); }
.priority-opt.selected.low    { background: rgba(148,163,184,0.1); color: var(--priority-low);   border-color: rgba(148,163,184,0.4); }

/* ─── Invitation List ────────────────────────────────────────── */
.invite-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: #F9FAFB;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
}
.invite-email { font-size: 0.9rem; }
.invite-status {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}
.invite-status.pending { background: rgba(255,184,0,0.1); color: var(--upcoming); }
.invite-status.accepted { background: rgba(68,255,136,0.1); color: var(--done); }

/* ─── Notification Badge ──────────────────────────────────────── */
.notif-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.notif-badge.overdue { background: rgba(255,68,68,0.1); color: var(--overdue); border: 1px solid rgba(255,68,68,0.2); }

/* ─── Responsive ─────────────────────────────────────────────── */
@media (max-width: 480px) {
  .tasks-grid { grid-template-columns: 1fr; }
  .overview-grid { gap: 8px; }
  .overview-card { padding: 12px; }
  .overview-card .count { font-size: 1.5rem; }
  .main-content { padding: 16px 14px 170px; }
  .cal-day { min-height: 54px; padding: 5px; }
  .cal-task-dot { display: none; }
  .cal-day-num { font-size: 0.8125rem; }
}

@media (min-width: 600px) {
  .tasks-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ─── Divider ────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: 16px 0;
}

/* ─── Profile Header ─────────────────────────────────────────── */
.profile-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}
.profile-avatar {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: #111111;
  border: 1px solid #E5E5E5;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: #FFFFFF;
  flex-shrink: 0;
}
.profile-name { font-size: 1.1rem; font-weight: 700; }
.profile-email { font-size: 0.875rem; color: var(--text-sub); margin-top: 3px; }

/* ─── Notification Popup ──────────────────────────────────────── */
.notif-popup {
  position: fixed;
  top: 70px;
  right: 16px;
  max-width: 320px;
  width: calc(100vw - 32px);
  background: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  z-index: 300;
  animation: fadeSlide 0.3s ease;
}
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.notif-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.notif-item:last-child { border-bottom: none; }
.notif-icon { font-size: 1rem; margin-top: 1px; flex-shrink: 0; }
.notif-text { font-size: 0.8125rem; line-height: 1.4; }
.notif-text strong { font-weight: 600; }
.notif-time { font-size: 0.6875rem; color: var(--text-muted); margin-top: 2px; }

/* ─── Push Notification Banner ────────────────────────────────── */
.push-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: #111111;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  cursor: pointer;
  transition: var(--transition);
}
.push-banner:hover { background: #2a2a2a; }
.push-banner-text { flex: 1; }
.push-banner-title { font-size: 0.875rem; font-weight: 600; color: #FFFFFF; }
.push-banner-sub { font-size: 0.75rem; color: rgba(255,255,255,0.55); margin-top: 2px; }
.push-banner-icon { font-size: 1.2rem; flex-shrink: 0; }
.push-banner-btn {
  background: #FFFFFF;
  color: #111111;
  border: none;
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
}

/* ─── Calendar page white bg ──────────────────────────────────── */
#page-content { background: transparent; }
.calendar-page-wrap { background: var(--bg); }

/* ─── Week num color fix ──────────────────────────────────────── */
.week-day-num { color: #111111; }
.week-day-col.today .week-day-num {
  background: #111111;
  color: #FFFFFF;
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 2px auto 0;
  font-size: 0.9rem;
}

/* ─── Settings push row special ───────────────────────────────── */
.settings-push-enabled {
  background: #F0FDF4;
  border-color: #BBF7D0;
}

/* ─── Drag & Drop Sorting ──────────────────────────────────────── */

/* ─── Drag & Drop ─────────────────────────────────────────── */

/* Drag handle */
.drag-handle {
  cursor: grab;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 4px 6px;
  border-radius: 4px;
  opacity: 0;
  transition: opacity 0.15s;
  flex-shrink: 0;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}
.task-card:hover .drag-handle,
.task-card.list-card:hover .drag-handle,
.cat-item:hover .drag-handle,
.cat-tree-node:hover > .cat-item .drag-handle {
  opacity: 0.6;
}
.drag-handle:hover { opacity: 1 !important; }
.drag-handle:active { cursor: grabbing; }

/* Category drag handle always slightly visible */
.cat-drag-handle {
  opacity: 0.3;
  font-size: 0.75rem;
  padding: 3px 5px;
}
.cat-item:hover .cat-drag-handle { opacity: 0.7; }

/* Ghost – floating copy that follows cursor */
.sortable-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.88;
  background: #FFFFFF;
  border: 1.5px solid rgba(0,0,0,0.12);
}

/* Placeholder – dashed area left where the dragged item was */
.sortable-holder {
  border-radius: 10px;
  background: rgba(0,0,0,0.04);
  border: 2px dashed #CCCCCC;
  flex-shrink: 0;
  transition: height 0.1s;
}

/* Tasks grid / list */
.tasks-grid .task-card,
.tasks-list .task-card { position: relative; }

/* ─── Friends & Chat ─────────────────────────────────────────── */

/* Nav badge */
.nav-badge {
  position: absolute;
  top: 4px; right: 14px;
  background: #DC2626;
  color: #fff;
  font-size: 0.6rem;
  font-weight: 700;
  border-radius: 999px;
  min-width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  pointer-events: none;
}

/* Friend avatar */
.friend-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3B82F6, #6366F1);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

/* Friends page */
.friends-page {
  padding: 16px;
  padding-bottom: 80px;
}
.page-title-row {
  margin-bottom: 16px;
}
.friend-item:last-child {
  border-bottom: none !important;
}

/* Chat page */
.chat-page {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg);
}
.chat-header {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  background: var(--nav-bg);
  flex-shrink: 0;
  gap: 4px;
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-bottom: 8px;
}
.chat-input-row {
  display: flex;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  padding-bottom: calc(10px + env(safe-area-inset-bottom));
}

/* Chat bubbles */
.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 78%;
}
.chat-msg.mine {
  align-self: flex-end;
  align-items: flex-end;
}
.chat-msg.theirs {
  align-self: flex-start;
  align-items: flex-start;
}
.chat-bubble {
  padding: 10px 14px;
  border-radius: 18px;
  font-size: 0.9rem;
  line-height: 1.45;
  word-break: break-word;
}
.chat-msg.mine .chat-bubble {
  background: #111111;
  color: #FFFFFF;
  border-bottom-right-radius: 4px;
}
.chat-msg.theirs .chat-bubble {
  background: #FFFFFF;
  color: #111111;
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}
.share-bubble {
  background: #FFFFFF !important;
  border: 1px solid var(--border) !important;
  color: #111111 !important;
  padding: 12px 14px !important;
  min-width: 200px;
  border-radius: 14px !important;
}
.chat-time {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-top: 3px;
  padding: 0 4px;
}

/* Page content full height for chat */
.main-content:has(.chat-page) {
  padding: 0 !important;
  overflow: hidden;
}