:root {
  --bg: #0e0f10;
  --surface: #18191b;
  --surface-2: #212327;
  --border: rgba(255, 255, 255, 0.07);
  --text: #f2f2f2;
  --text-dim: #9a9ca3;
  --accent: #d4f56a;
  --accent-text: #14150f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

button {
  font: inherit;
  color: inherit;
  -webkit-appearance: none;
  appearance: none;
}

#app {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px 16px calc(24px + env(safe-area-inset-bottom));
}

/* Mode switch */

#mode-switch {
  display: flex;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 4px;
  margin-bottom: 20px;
}

.mode-btn {
  flex: 1;
  padding: 8px 0;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 600;
  transition: background 0.15s ease, color 0.15s ease;
}

.mode-btn.active {
  background: var(--accent);
  color: var(--accent-text);
}

/* Nav header (prev / label / next) -- shared by all three views */

#nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

#nav-header button {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

#nav-header button:active {
  background: var(--surface-2);
}

#nav-label {
  font-weight: 600;
  font-size: 15px;
  text-transform: capitalize;
}

/* Dot indicator -- shared language for the day strip and month grid:
   green = today has items, grey = upcoming day has items, recolored = selected day
   has items. Past days with items get no dot at all -- see .faded above/below instead. */

.dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  opacity: 0;
}

.dot.dot-today {
  opacity: 1;
  background: var(--accent);
}

.dot.dot-future {
  opacity: 1;
  background: var(--text-dim);
}

.dot.dot-selected {
  opacity: 1;
  background: var(--accent-text);
}

/* Day view */

#week-strip {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  margin-bottom: 24px;
}

.day-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 0 8px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  transition: transform 0.1s ease, background 0.15s ease, border-color 0.15s ease;
}

.day-cell .wd {
  font-size: 11px;
  text-transform: uppercase;
  opacity: 0.8;
}

.day-cell .num {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.day-cell.today .num {
  color: var(--accent);
}

.day-cell.selected {
  background: var(--accent);
  border-color: var(--accent);
}

.day-cell.selected .wd,
.day-cell.selected .num {
  color: var(--accent-text);
}

.day-cell.faded {
  opacity: 0.5;
}

#selected-date-label {
  font-size: 20px;
  font-weight: 700;
  margin: 12px 0;
}

/* Day items -- task cards for the selected day */

#day-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.day-items-empty {
  color: var(--text-dim);
  font-size: 14px;
  text-align: center;
  padding: 24px 0;
  margin: 0;
}

.item-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.item-card.done {
  opacity: 0.5;
}

.item-time {
  flex: 0 0 auto;
  min-width: 44px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  padding-top: 1px;
}

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

.item-title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  word-wrap: break-word;
}

.item-card.done .item-title {
  text-decoration: line-through;
  color: var(--text-dim);
}

.item-notes {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--text-dim);
  word-wrap: break-word;
}

/* Month view */

#month-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.weekday-label {
  text-align: center;
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 0 0 8px;
}

.month-day {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.1s ease;
}

.month-day.today {
  color: var(--accent);
  border-color: var(--accent);
}

.month-day.faded {
  opacity: 0.5;
}

/* Year view */

#year-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.month-tile {
  padding: 22px 0;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  text-transform: capitalize;
  transition: transform 0.1s ease;
}

.month-tile.current {
  color: var(--accent);
  border-color: var(--accent);
}

.day-cell:active,
.month-day:active,
.month-tile:active {
  transform: scale(0.96);
}

.error-text {
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  font-size: 14px;
  line-height: 1.5;
}