/* common.css — Shared base styles, CSS variables, responsive foundations */

/* ============ CSS Variables (defaults — overridden by theme.js) ============ */
:root {
  /* Colors — set by theme */
  --bg-primary: #faf8f5;
  --bg-secondary: #f0ece6;
  --bg-card: #ffffff;
  --bg-nav: #ffffff;
  --text-primary: #2c2c2c;
  --text-secondary: #6b6b6b;
  --text-muted: #999999;
  --border-color: #e8e4de;
  --border-light: #f0ece6;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --overlay-bg: rgba(0,0,0,0.4);

  /* Accent — set by theme */
  --accent: #5b7fd6;
  --accent-light: #5b7fd620;
  --accent-hover: #5b7fd6dd;

  /* Semantic colors */
  --success-bg: #e8f5e9;
  --success-text: #2e7d32;
  --warning-bg: #fff3e0;
  --warning-text: #e65100;
  --danger-bg: #ffebee;
  --danger-text: #c62828;
  --info-bg: #e3f2fd;
  --info-text: #1565c0;

  /* Grade colors */
  --grade-a: #2e7d32;
  --grade-b: #1565c0;
  --grade-c: #f9a825;
  --grade-d: #e65100;
  --grade-f: #c62828;

  /* Layout */
  --nav-height: 60px;
  --header-height: 56px;
  --max-width: 600px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.8125rem;
  --font-size-base: 0.9375rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.5;
  min-height: 100dvh;
  padding-bottom: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  width: 100%;
  transition: border-color var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

img {
  max-width: 100%;
  display: block;
}

/* ============ Layout ============ */
.page-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-md);
  padding-top: calc(var(--header-height) + var(--spacing-md));
}

/* ============ Header ============ */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header__left {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  min-width: 0;
}

.header__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header__subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  white-space: nowrap;
}

.header__right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.header__admin,
.header__debug {
  font-size: 1.25rem;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.header__admin:hover,
.header__debug:hover {
  background: var(--bg-secondary);
}

/* ============ Bottom Navigation ============ */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--bg-nav);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
  box-shadow: 0 -1px 8px rgba(0,0,0,0.06);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: var(--spacing-xs) var(--spacing-sm);
  min-width: 64px;
  min-height: 44px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.nav-item--active {
  color: var(--accent);
}

.nav-item__icon {
  font-size: 1.3rem;
  line-height: 1;
}

.nav-item__label {
  font-size: var(--font-size-xs);
  font-weight: 500;
}

/* ============ Cards ============ */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.card + .card {
  margin-top: var(--spacing-md);
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--font-size-sm);
  min-height: 44px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn--primary {
  background: var(--accent);
  color: white;
}

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

.btn--primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

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

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

.btn--danger:hover {
  opacity: 0.9;
}

.btn--ghost {
  color: var(--accent);
  background: transparent;
}

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

.btn--full {
  width: 100%;
}

.btn--sm {
  padding: 6px 12px;
  min-height: 36px;
  font-size: var(--font-size-xs);
}

/* ============ Loading ============ */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  z-index: 200;
}

.loading-inline {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  justify-content: center;
  color: var(--text-secondary);
}

.loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-spinner--small {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.loading-text {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============ Connection Status ============ */
.connection-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.connection-dot--online {
  background: var(--success-text);
}

.connection-dot--offline {
  background: var(--danger-text);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============ Empty State ============ */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
  color: var(--text-secondary);
}

.empty-state__icon {
  font-size: 3rem;
  display: block;
  margin-bottom: var(--spacing-md);
}

.empty-state__title {
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.empty-state__subtitle {
  font-size: var(--font-size-sm);
}

/* ============ Person Filter ============ */
.person-filter {
  display: flex;
  gap: var(--spacing-sm);
  overflow-x: auto;
  padding: var(--spacing-sm) 0;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

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

.person-pill {
  flex-shrink: 0;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 2px solid transparent;
  min-height: 36px;
  transition: all var(--transition-fast);
}

.person-pill--active {
  background: var(--accent-light);
  color: var(--accent);
  border-color: var(--accent);
}

.person-pill[data-person-id]:not([data-person-id=""]).person-pill--active {
  border-color: var(--person-color);
  color: var(--person-color);
}

/* ============ Undo Toast ============ */
.undo-toast {
  position: fixed;
  bottom: calc(var(--nav-height) + var(--spacing-md) + env(safe-area-inset-bottom, 0px));
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  box-shadow: var(--shadow-lg);
  z-index: 150;
  animation: slideUp 0.3s ease;
  max-width: calc(100vw - 32px);
}

.undo-toast__message {
  font-size: var(--font-size-sm);
}

.undo-toast__btn {
  color: var(--accent);
  font-weight: 700;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  white-space: nowrap;
}

@keyframes slideUp {
  from {
    transform: translateX(-50%) translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
  }
}

/* ============ Modal ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  padding: var(--spacing-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.modal {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  width: 100%;
  max-width: 360px;
  box-shadow: var(--shadow-lg);
}

.modal__title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
}

.modal__message {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-lg);
}

.modal__actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

/* ============ Bottom Sheet ============ */
.bottom-sheet-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-card);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform var(--transition-normal);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.bottom-sheet-overlay.active .bottom-sheet {
  transform: translateY(0);
}

.bottom-sheet__handle {
  width: 36px;
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  margin: var(--spacing-sm) auto var(--spacing-md);
}

.bottom-sheet__content {
  padding: 0 var(--spacing-md) var(--spacing-lg);
}

/* ============ Form Elements ============ */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--danger-text);
  margin-top: var(--spacing-xs);
}

.form-row {
  display: flex;
  gap: var(--spacing-sm);
}

.form-row > * {
  flex: 1;
}

/* ============ Chip / Tag ============ */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

/* ============ Utilities ============ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: var(--font-size-sm); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* ============ Color Swatch (for setup/admin) ============ */
.color-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--spacing-sm);
}

.color-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 28px;
}

.color-swatch:hover {
  transform: scale(1.15);
}

.color-swatch.selected {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 2px var(--bg-card), 0 0 0 4px var(--text-primary);
}

/* ============ Step Indicator (for setup wizard) ============ */
.step-indicator {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) 0;
}

.step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
  transition: all var(--transition-fast);
}

.step-dot--active {
  background: var(--accent);
  transform: scale(1.2);
}

.step-dot--done {
  background: var(--success-text);
}

/* ============ Dashboard — Date Header ============ */
.date-header {
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.date-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

.date-nav__btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.date-nav__btn:hover {
  background: var(--accent-light);
  color: var(--accent);
}

.date-nav__center {
  min-width: 180px;
}

.date-header__day {
  font-size: var(--font-size-xl);
  font-weight: 700;
  display: block;
}

.date-header__full {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.date-header__grade {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

/* ============ Progress Bar ============ */
.progress-section {
  margin-bottom: var(--spacing-md);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.progress-pct {
  font-weight: 600;
  color: var(--accent);
}

.progress-bar {
  height: 8px;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: var(--accent);
  border-radius: var(--radius-full);
  transition: width 0.4s ease;
}

/* ============ Task Card ============ */
.task-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--owner-color, var(--border-light));
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  min-height: 44px;
}

.task-card + .task-card {
  margin-top: var(--spacing-xs);
}

.task-card:active {
  transform: scale(0.98);
}

.task-card--done {
  opacity: 0.5;
  background: var(--bg-secondary);
  border-color: transparent;
  border-left-color: var(--owner-color, transparent);
  box-shadow: none;
}

.task-card--done .task-card__name {
  text-decoration: line-through;
  color: var(--text-secondary);
}

.task-card--overdue {
  border-left-color: var(--warning-text);
  background: color-mix(in srgb, var(--warning-text) 5%, var(--bg-card));
}

.task-card__initial {
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: var(--owner-color, var(--text-secondary));
  flex-shrink: 0;
  width: 1.2em;
  text-align: center;
}

.task-card__name {
  flex: 1;
  min-width: 0;
  font-weight: 600;
  font-size: var(--font-size-base);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.task-card__right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
  margin-left: auto;
}

.task-card__meta {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  white-space: nowrap;
}

.task-card__date {
  font-size: var(--font-size-xs);
  color: var(--warning-text);
  font-weight: 600;
  white-space: nowrap;
}

.task-card__pts--up {
  color: var(--success-text);
  font-weight: 700;
}

.task-card__pts--down {
  color: var(--danger-text);
  font-weight: 700;
}

.task-card__check {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-medium, var(--border-light));
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  position: relative;
  background: var(--bg-card);
}

.task-card--done .task-card__check {
  background: var(--accent);
  border-color: var(--accent);
}

.task-card--done .task-card__check::after {
  content: '✓';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 700;
}

/* ============ Time of Day Section ============ */
.time-header {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-xs);
}

.time-header:first-child {
  margin-top: 0;
}

/* ============ Calendar Grid ============ */
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
  margin-top: var(--spacing-sm);
}

.cal-grid__dow {
  text-align: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: var(--spacing-xs) 0;
}

.cal-grid__cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-xs) 2px;
  min-height: 68px;
  background: var(--bg-card);
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.cal-grid__cell--empty {
  background: transparent;
  cursor: default;
}

.cal-grid__cell:active:not(.cal-grid__cell--empty) {
  transform: scale(0.95);
}

.cal-grid__cell--today {
  background: var(--accent-light);
}

.cal-grid__cell--today .cal-grid__day {
  color: var(--accent);
  font-weight: 800;
}

.cal-grid__cell--selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.cal-grid__cell--alldone {
  background: color-mix(in srgb, var(--success-text, #2e7d32) 8%, var(--bg-card));
}

.cal-grid__day {
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1;
}

/* Month section */
.cal-month {
  margin-bottom: var(--spacing-lg);
}

.cal-month__title {
  font-weight: 800;
  font-size: var(--font-size-base);
  text-align: center;
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
}

.cal-month--current .cal-month__title {
  color: var(--accent);
}

/* Frequency breakdown in cells */
.cal-grid__freq {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-top: 2px;
  align-items: center;
}

.cal-freq {
  font-size: 9px;
  font-weight: 700;
  line-height: 1.3;
}

.cal-freq--d { color: var(--text-secondary); }
.cal-freq--w { color: var(--accent); }
.cal-freq--m { color: var(--warning-text, #b86e00); }

/* ============ Calendar Day Sheet ============ */
.cal-sheet-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  z-index: 200;
  transition: background 0.3s ease;
  pointer-events: none;
}

.cal-sheet-overlay.active {
  background: rgba(0, 0, 0, 0.35);
  pointer-events: auto;
}

.cal-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 70vh;
  background: var(--bg-primary);
  border-radius: var(--radius-xl, 20px) var(--radius-xl, 20px) 0 0;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.15);
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.32, 0.72, 0, 1);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0 var(--spacing-md) var(--spacing-xl);
  padding-bottom: calc(var(--spacing-xl) + 70px); /* room for nav bar */
}

.cal-sheet.active {
  transform: translateY(0);
}

.cal-sheet__handle {
  width: 36px;
  height: 4px;
  background: var(--border-light);
  border-radius: 2px;
  margin: var(--spacing-sm) auto var(--spacing-md);
}

.cal-sheet__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
}

.cal-sheet__title {
  font-weight: 800;
  font-size: var(--font-size-lg, 1.15rem);
}

.cal-sheet__today {
  display: inline-block;
  background: var(--accent);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  vertical-align: middle;
  margin-left: 4px;
}

.cal-sheet__summary {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.cal-sheet__progress {
  height: 4px;
  background: var(--bg-secondary);
  border-radius: 2px;
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

.cal-sheet__progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.4s ease;
}

/* ============ Overdue Banner ============ */
.overdue-banner {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--warning-bg);
  border: 1px solid var(--warning-text);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.overdue-banner__icon {
  font-size: 1.1rem;
}

.overdue-banner__text {
  flex: 1;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--warning-text);
  text-align: left;
}

.overdue-banner__arrow {
  font-size: var(--font-size-sm);
  color: var(--warning-text);
  transition: transform var(--transition-fast);
}

.overdue-banner__arrow.expanded {
  transform: rotate(90deg);
}

.overdue-list {
  margin-bottom: var(--spacing-md);
}

/* ============ Grade Badge ============ */
.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 800;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  line-height: 1.3;
}

.grade-badge--a { background: color-mix(in srgb, var(--grade-a) 15%, transparent); color: var(--grade-a); }
.grade-badge--b { background: color-mix(in srgb, var(--grade-b) 15%, transparent); color: var(--grade-b); }
.grade-badge--c { background: color-mix(in srgb, var(--grade-c) 15%, transparent); color: var(--grade-c); }
.grade-badge--d { background: color-mix(in srgb, var(--grade-d) 15%, transparent); color: var(--grade-d); }
.grade-badge--f { background: color-mix(in srgb, var(--grade-f) 15%, transparent); color: var(--grade-f); }
.grade-badge--none { color: var(--text-muted); }

/* ============ Task Detail Sheet ============ */
.task-detail__info {
  margin-bottom: var(--spacing-sm);
}

.task-detail__name {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.task-detail__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.task-detail__slider {
  padding: var(--spacing-sm) 0;
}

.task-detail__slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xs);
}

.task-detail__slider-value {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--accent);
}

.task-detail__slider-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.task-detail__slider-row .slider {
  flex: 1;
  min-width: 0;
}

.btn--sm {
  padding: 4px 10px;
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

.task-detail__grade-preview {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
  text-align: right;
}

/* Range slider */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--bg-secondary);
  border-radius: 3px;
  outline: none;
  border: none;
  padding: 0;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.slider::-moz-range-thumb {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
}

/* ============ Celebration ============ */
.celebration {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 250;
  background: var(--overlay-bg);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

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

.celebration__content {
  text-align: center;
  animation: celebrationPop 0.5s ease;
}

.celebration__icon {
  font-size: 4rem;
  display: block;
  margin-bottom: var(--spacing-md);
}

.celebration__title {
  font-size: var(--font-size-xl);
  color: var(--bg-primary);
  margin-bottom: var(--spacing-xs);
}

.celebration__subtitle {
  font-size: var(--font-size-sm);
  color: var(--bg-secondary);
}

@keyframes celebrationPop {
  0% { transform: scale(0.5); opacity: 0; }
  60% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

/* ============ Scoreboard ============ */

/* Period tabs */
.sb-period-tabs {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 3px;
}

.sb-tab {
  flex: 1;
  padding: 8px 4px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.sb-tab--active {
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* Person grade cards (leaderboard) */
.sb-cards {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.sb-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--person-color, var(--accent));
  border-radius: var(--radius-md);
  cursor: pointer;
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  transition: transform 0.1s;
}

.sb-card:active {
  transform: scale(0.98);
}

.sb-card__left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex: 1;
  min-width: 0;
}

.sb-card__initial {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-md);
  color: #fff;
  flex-shrink: 0;
}

.sb-card__info {
  min-width: 0;
}

.sb-card__name {
  display: block;
  font-weight: 600;
  font-size: var(--font-size-md);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sb-card__meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.sb-card__right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}

.sb-card__grade {
  font-size: var(--font-size-lg);
  font-weight: 700;
}

.sb-card__pct {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

/* Streak & trend inline */
.sb-streak { font-size: var(--font-size-sm); }
.sb-time { font-size: var(--font-size-sm); color: var(--text-muted); }
.sb-trend { font-weight: 700; font-size: var(--font-size-sm); }
.sb-trend--up { color: var(--grade-a); }
.sb-trend--down { color: var(--grade-f); }

/* Section labels */
.sb-section-label {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

/* All grades table */
.sb-grades-table {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
}

.sb-grades-row {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.sb-grades-row:last-child { border-bottom: none; }

.sb-grades-header {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.sb-grades-cell {
  text-align: center;
}

.sb-grades-cell--name {
  text-align: left;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.sb-mini-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

/* Trends (sparkline bars) */
.sb-trends {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.sb-trend-row {
  display: flex;
  align-items: flex-end;
  gap: var(--spacing-sm);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
}

.sb-trend-name {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: 500;
  min-width: 80px;
  flex-shrink: 0;
}

.sb-sparkline {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  flex: 1;
  height: 48px;
}

.sb-spark-bar {
  flex: 1;
  height: 100%;
  display: flex;
  align-items: flex-end;
  background: var(--bg-secondary);
  border-radius: 3px 3px 0 0;
  overflow: hidden;
}

.sb-spark-fill {
  width: 100%;
  border-radius: 3px 3px 0 0;
  transition: height 0.3s ease;
  min-height: 2px;
}

.sb-spark-fill--a { background: var(--grade-a); }
.sb-spark-fill--b { background: var(--grade-b); }
.sb-spark-fill--c { background: var(--grade-c); }
.sb-spark-fill--d { background: var(--grade-d); }
.sb-spark-fill--f { background: var(--grade-f); }
.sb-spark-fill--none { background: var(--bg-tertiary, var(--border-color)); }

/* Category breakdown */
.sb-categories {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.sb-cat-person {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
}

.sb-cat-person-name {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.sb-cat-bars {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.sb-cat-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.sb-cat-label {
  font-size: var(--font-size-xs);
  min-width: 90px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sb-cat-bar {
  flex: 1;
  height: 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
  overflow: hidden;
}

.sb-cat-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
}

.sb-cat-bar-fill--a { background: var(--grade-a); }
.sb-cat-bar-fill--b { background: var(--grade-b); }
.sb-cat-bar-fill--c { background: var(--grade-c); }
.sb-cat-bar-fill--d { background: var(--grade-d); }
.sb-cat-bar-fill--f { background: var(--grade-f); }

.sb-cat-pct {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  min-width: 32px;
  text-align: right;
}

/* Streaks section */
.sb-streaks {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.sb-streak-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
}

.sb-streak-name {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.sb-streak-vals {
  display: flex;
  gap: var(--spacing-md);
  font-size: var(--font-size-sm);
}

.sb-streak-current { color: var(--text-primary); font-weight: 600; }
.sb-streak-best { color: var(--text-secondary); }

/* Drilldown bottom sheet */
.sb-drilldown {
  padding-bottom: var(--spacing-lg);
}

.sb-drilldown__header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.sb-drilldown__name {
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.sb-drilldown__period {
  margin-left: auto;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.sb-drilldown__summary {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.grade-badge--lg {
  font-size: var(--font-size-xl);
  padding: 6px 14px;
}

.sb-drilldown__stats {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.sb-drilldown__group {
  margin-bottom: var(--spacing-sm);
}

.sb-drilldown__group-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--spacing-xs) 0;
}

.sb-status--missed { color: var(--grade-f); }
.sb-status--late { color: var(--grade-d); }
.sb-status--pending { color: var(--text-muted); }
.sb-status--done { color: var(--grade-a); }

.sb-drilldown__task {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--border-color);
}

.sb-drilldown__task:last-child { border-bottom: none; }

.sb-drilldown__task-name {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sb-drilldown__task-date {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  flex-shrink: 0;
}

.sb-drilldown__task-pts {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  flex-shrink: 0;
  min-width: 36px;
  text-align: right;
}

.sb-drilldown__empty {
  text-align: center;
  color: var(--text-muted);
  padding: var(--spacing-lg);
  font-size: var(--font-size-sm);
}

/* ============ Tracker ============ */

.tracker-tabs {
  display: flex;
  gap: var(--spacing-xs);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 3px;
}

.tracker-tab {
  flex: 1;
  padding: 8px 0;
  border-radius: calc(var(--radius-md) - 2px);
  font-size: var(--font-size-sm);
  font-weight: 600;
  background: transparent;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tracker-tab--active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.tracker-period {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  padding: var(--spacing-sm) 0;
  font-weight: 500;
}

.tracker-filters {
  display: flex;
  gap: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
}

.tracker-select {
  flex: 1;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b6b6b' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 28px;
}

.tracker-content {
  padding-top: var(--spacing-sm);
}

/* Summary bar */
.tracker-summary {
  margin-bottom: var(--spacing-md);
}

.tracker-summary__bar {
  height: 6px;
  background: var(--bg-secondary);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.tracker-summary__fill {
  height: 100%;
  background: var(--success-text);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.tracker-summary__counts {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.tracker-summary__count {
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.tracker-summary__count--done { color: var(--success-text); }
.tracker-summary__count--late { color: var(--warning-text); }
.tracker-summary__count--overdue { color: var(--danger-text); }
.tracker-summary__count--upcoming { color: var(--text-secondary); }
.tracker-summary__count--skipped { color: var(--text-muted); }

/* Week group headers (monthly view) */
.tracker-week-group {
  margin-bottom: var(--spacing-md);
}

.tracker-week-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  padding: var(--spacing-sm) 0 var(--spacing-xs);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--spacing-xs);
}

/* Tracker rows */
.tracker-rows {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tracker-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 10px var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.tracker-row--overdue {
  border-left: 3px solid var(--danger-text);
  background: var(--danger-bg);
}

.tracker-row--done {
  opacity: 0.7;
}

.tracker-row__initial {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--owner-color);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.tracker-row__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tracker-row__name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tracker-row--done .tracker-row__name {
  text-decoration: line-through;
  color: var(--text-muted);
}

.tracker-row__meta {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
}

.tracker-row__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  flex-shrink: 0;
}

.tracker-row__completed {
  font-size: 11px;
  color: var(--text-muted);
}

/* Status badges */
.tracker-status {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.tracker-status--done {
  background: var(--success-bg);
  color: var(--success-text);
}

.tracker-status--late {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.tracker-status--overdue {
  background: var(--danger-bg);
  color: var(--danger-text);
}

.tracker-status--upcoming {
  background: var(--bg-secondary);
  color: var(--text-secondary);
}

.tracker-status--skipped {
  background: var(--bg-secondary);
  color: var(--text-muted);
}

/* ============ Responsive ============ */
@media (min-width: 768px) {
  :root {
    --max-width: 700px;
  }
}

@media (min-width: 1024px) {
  :root {
    --max-width: 800px;
  }
}