:root {
  color-scheme: light;
  --bg: #ffffff;
  --panel: #ffffff;
  --panel-strong: #eef3ff;
  --header-bg: linear-gradient(145deg, #f3f6ff, #e6edff);
  --sidebar-bg: #f9fbff;
  --grid-line: rgba(12, 39, 82, 0.14);
  --text: #0f1d35;
  --muted: #7b8697;
  --accent: #0a84ff;
  --accent-strong: #075ecb;
  --chip-bg: #ffffff;
  --chip-hover: rgba(10, 132, 255, 0.08);
  --chip-selected: rgba(10, 132, 255, 0.16);
  --weekday-bg: #ffffff;
  --weekday-text: #4b5563;
  --weekend-bg: #f1f3fa;
  --weekend-text: #0f1d35;
  --disabled-day-bg: #dde3f0;
  --month-col: #ffffff;
  --shadow: 0 18px 36px rgba(12, 39, 82, 0.16);
  --event-bg1: rgba(10, 132, 255, 0.16);
  --event-bg2: rgba(10, 132, 255, 0.32);
  --event-border: rgba(10, 132, 255, 0.5);
  --event-text: #000000;
  --btn-surface: #e1e1e4;
  --btn-hover: #f4f4f5;
  --input-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35);
  --input-shadow-compact: inset 0 1px 0 rgba(255, 255, 255, 0.25);
  --event-shadow: 0 8px 16px rgba(0, 0, 0, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.theme-dark {
  color-scheme: dark;
  --bg: #18181b;
  --panel: #18181b;
  --panel-strong: #18181b;
  --header-bg: #18181b;
  --sidebar-bg: #3f3f46;
  --grid-line: rgba(255, 255, 255, 0.08);
  --text: #f4f4f5;
  --muted: #97a3b7;
  --accent: #64a9ff;
  --chip-bg: #1e2738;
  --chip-hover: rgba(255, 255, 255, 0.08);
  --chip-selected: rgba(255, 255, 255, 0.16);
  --weekday-bg: #1b1c20;
  --weekday-text: #ffffff;
  --weekend-bg: #262834;
  --weekend-text: #f4f4f5;
  --disabled-day-bg: #111216;
  --disabled-day-text: #8b93a5;
  --month-col: #3f3f46;
  --shadow: 0 18px 36px rgba(0, 0, 0, 0.45);
  --event-bg1: rgba(100, 169, 255, 0.28);
  --event-bg2: rgba(58, 119, 255, 0.38);
  --event-border: rgba(100, 169, 255, 0.6);
  --event-text: #f7fbff;
  --btn-surface: #3a3a3d;
  --btn-hover: #444447;
  --btn-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 8px 18px rgba(0, 0, 0, 0.45);
  --btn-shadow-compact: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 8px 16px rgba(0, 0, 0, 0.4);
  --btn-active-shadow: 0 5px 9px rgba(255, 255, 255, 0.1);
  --input-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
  --input-shadow-compact: inset 0 1px 0 rgba(255, 255, 255, 0.16);
  --event-shadow: 0 8px 16px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  display: flex;
  flex-direction: column;
  padding-bottom: 12px;
}

header {
  padding: 0.25rem 1.1rem;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.6rem;
  background: var(--header-bg);
  /* border-bottom: 8px solid var(--grid-line); */
  margin-bottom: 6px;
  position: sticky;
  top: 0;
  z-index: 20;
}

.year-layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0.75rem;
  padding: 0;
  align-items: stretch;
}

.year-layout.sidebar-collapsed {
  grid-template-columns: 1fr;
}

.main-panel {
  min-width: 0;
  height: 100%;
  min-height: 0;
  display: flex;
}

.controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--muted);
  flex-wrap: wrap;
}

.controls label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
}

.input {
  width: 6rem;
  padding: 0.38rem 0.55rem;
  border-radius: 12px;
  border: 1px solid var(--grid-line);
  background: var(--panel);
  color: var(--text);
  text-align: center;
  box-shadow: var(--input-shadow);
  font-weight: 600;
}

.input-compact {
  width: 5rem;
  padding: 0.32rem 0.5rem;
  border-radius: 10px;
  box-shadow: var(--input-shadow-compact);
}

.calendar-filters {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  color: var(--muted);
  width: 100%;
  max-width: 360px;
  min-width: 260px;
  max-height: 100%;
  overflow-y: auto;
  padding: 0.85rem;
  background: var(--sidebar-bg);
  border: 1px solid var(--grid-line);
  border-radius: 14px;
}

.calendar-filters.collapsed {
  display: none;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
  text-align: center;
}

.min-duration-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.min-duration-controls .btn {
  min-width: 0;
}

.year-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.view-mode-label {
  display: inline-flex;
  align-items: center;
}

.view-mode-label select {
  min-width: 90px;
}

.btn,
.year-btn,
.cal-action-btn {
  --btn-padding-y: 0.38rem;
  --btn-padding-x: 0.68rem;
  --btn-radius: 12px;
  --btn-font-size: 0.95rem;
  border: 1px solid var(--grid-line);
  background: var(--btn-surface);
  color: var(--text);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border-radius: var(--btn-radius);
  font-weight: 700;
  font-size: var(--btn-font-size);
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
  box-shadow: var(--btn-shadow);
}

.btn:hover,
.year-btn:hover,
.cal-action-btn:hover {
  border-color: var(--accent);
  background: var(--btn-hover);
  box-shadow: var(--btn-active-shadow);
}

.btn:active,
.year-btn:active,
.cal-action-btn:active {
  transform: translateY(1px);
}

.btn:focus-visible,
.year-btn:focus-visible,
.cal-action-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn[data-size="compact"],
.cal-action-btn {
  --btn-padding-y: 0.3rem;
  --btn-padding-x: 0.65rem;
  --btn-radius: 10px;
  --btn-font-size: 0.82rem;
  box-shadow: var(--btn-shadow-compact);
}

.calendar-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  background: var(--panel);
  border: 2px solid var(--grid-line);
  box-shadow: var(--shadow);
}

/* Scroll container for the infinite grid */
.grid-viewport {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  /* GridView compensates scrollTop manually when prepending rows; native
     scroll anchoring would double-compensate and cause drift. */
  overflow-anchor: none;
  display: flex;
  flex-direction: column;
  background: var(--grid-line);
}

.filter-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.cal-actions {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.duration-filters-notice {
  width: 100%;
  padding: 0.38rem 0.55rem;
  border-radius: 10px;
  border: 1px dashed var(--grid-line);
  background: var(--chip-hover);
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 600;
}

.duration-filters-notice[hidden] {
  display: none;
}

.cal-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 0.35rem;
  padding-top: 0.35rem;
  border-top: 1px dashed var(--grid-line);
}

.cal-list-head {
  display: grid;
  grid-template-columns: auto 2.8rem 4.3rem;
  align-items: center;
  margin-top: 0.35rem;
  padding: 0rem 0.55rem 0rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.cal-list-head span:nth-child(2) {
  padding-left: 0.4rem;
}

.calendar-row {
  display: grid;
  grid-template-columns: auto 2.8rem 4.3rem;
  align-items: center;
  gap: 0.35rem;
}

.calendar-duration-control {
  display: inline-grid;
  grid-template-columns: 2rem 1.3rem 1rem;
  align-items: center;
  gap: 0.28rem;
  padding: 0.14rem 0.2rem;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--text);
  font-size: 0.8rem;
  white-space: nowrap;
  justify-self: end;
}

.calendar-duration-control:hover {
  background: var(--chip-hover);
}

.filter-overridden {
  opacity: 0.55;
}

.cal-chip-toggle.filter-overridden,
.cal-chip.filter-overridden,
.calendar-duration-control.filter-overridden,
.calendar-mode-toggle.filter-overridden {
  cursor: not-allowed;
}

.calendar-mode-toggle:disabled,
.calendar-duration-step:disabled,
#minDurationDown:disabled,
#minDurationUp:disabled {
  opacity: 0.55;
}

.calendar-duration-input {
  width: 100%;
  min-width: 0;
  padding: 0.22rem 0.18rem;
  min-inline-size: 4ch;
  border-radius: 9px;
  box-shadow: var(--input-shadow-compact);
}

.calendar-duration-step.btn {
  --btn-padding-y: 0.12rem;
  --btn-padding-x: 0.28rem;
  --btn-radius: 8px;
  --btn-font-size: 0.7rem;
  min-width: 1.45rem;
  width: 1.45rem;
  padding-inline: 0;
  justify-content: center;
}

.separator {
  border-top: 1px dashed var(--grid-line);
  margin: 0.35rem 0;
  padding-top: 0.35rem;
}

.select-buttons {
  display: flex;
  gap: 0.45rem;
}

.cal-chip,
.cal-chip-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.26rem 0.55rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text);
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
  justify-content: space-between;
}

.cal-chip {
  width: 100%;
}

.calendar-select-chip {
  flex: 1;
  min-width: 0;
  width: auto;
}

.calendar-mode-toggle {
  width: 2rem;
  min-width: 2rem;
  padding: 0.26rem 0.2rem;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "Consolas", "SFMono-Regular", monospace;
  font-size: 0.95rem;
  line-height: 1;
  font-weight: 600;
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  color: var(--muted);
}

.calendar-mode-toggle[data-mode="yes"] {
  color: var(--muted);
}

.calendar-mode-toggle[data-mode="no"],
.calendar-mode-toggle[data-mode="follow"] {
  color: var(--muted);
}

.calendar-mode-toggle:hover {
  background: var(--chip-hover);
  color: var(--muted);
}

.calendar-mode-toggle:focus-visible {
  outline: 2px solid var(--muted);
  outline-offset: 2px;
}

.theme-dark .cal-chip {
  background: transparent;
  box-shadow: none;
}

.cal-chip:hover {
  background: var(--chip-hover);
}

.cal-chip.selected {
  background: var(--chip-selected);
  color: var(--text);
}

.cal-chip-toggle input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.cal-chip-toggle .chip-indicator {
  width: 36px;
  height: 20px;
  background: var(--btn-surface);
  border-radius: 10px;
  position: relative;
  transition: background 200ms ease;
  border: 1px solid var(--grid-line);
}

.cal-chip-toggle .chip-indicator::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  background: var(--text);
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform 200ms ease;
}

.cal-chip-toggle input[type="checkbox"]:checked~.chip-indicator {
  background: var(--accent);
}

.cal-chip-toggle input[type="checkbox"]:checked~.chip-indicator::after {
  transform: translateX(16px);
  background: var(--panel);
}

.cal-chip-toggle:hover {
  background: var(--chip-hover);
}

.cal-chip-toggle .chip-text {
  flex: 1;
}

.selected-summary {
  flex: 1;
  min-width: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.selected-summary::before {
  content: "•";
  color: var(--grid-line);
}

/* Rows stack vertically; each row is its own CSS grid. */
.calendar-rows {
  display: flex;
  flex-direction: column;
  gap: 1px;
  /* Gap value must match ROW_GAP in grid-view.js */
}

.grid-row {
  display: grid;
  gap: 1px;
  background: var(--grid-line);
  position: relative;
  flex: none;
}

.grid-row.linear {
  grid-template-columns: 120px repeat(31, minmax(0, 1fr));
}

/* Day-of-week aligned view: needs up to 37 columns (6 empty + 31 days max) */
.grid-row.day-aligned {
  grid-template-columns: 120px repeat(37, minmax(0, 1fr));
}

/* Week-row views: month label column plus 4/2/1 weeks */
.grid-row.week-rows {
  grid-template-columns: 120px repeat(28, minmax(0, 1fr));
}

.grid-row.two-week-rows {
  grid-template-columns: 120px repeat(14, minmax(0, 1fr));
}

.grid-row.one-week-rows {
  grid-template-columns: 120px repeat(7, minmax(0, 1fr));
}

/* Sticky weekday header shared by all rows */
.grid-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  gap: 1px;
  background: var(--grid-line);
  flex: none;
  margin-bottom: 1px;
}

.grid-header.hidden {
  display: none;
}

.grid-header.day-aligned {
  grid-template-columns: 120px repeat(37, minmax(0, 1fr));
}

.grid-header.week-rows {
  grid-template-columns: 120px repeat(28, minmax(0, 1fr));
}

.grid-header.two-week-rows {
  grid-template-columns: 120px repeat(14, minmax(0, 1fr));
}

.grid-header.one-week-rows {
  grid-template-columns: 120px repeat(7, minmax(0, 1fr));
}

.weekday-header {
  background: var(--panel-strong);
  font-weight: 700;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  padding: 8px 4px;
  text-align: center;
}

/* Per-row event overlay; spans the same grid as the row's day cells. */
.row-events {
  pointer-events: none;
  position: absolute;
  inset: 0;
  display: grid;
  gap: 1px;
  grid-template-rows: 1fr;
  background: transparent;
}

.row-events.linear {
  grid-template-columns: 120px repeat(31, minmax(0, 1fr));
}

.row-events.day-aligned {
  grid-template-columns: 120px repeat(37, minmax(0, 1fr));
}

.row-events.week-rows {
  grid-template-columns: 120px repeat(28, minmax(0, 1fr));
}

.row-events.two-week-rows {
  grid-template-columns: 120px repeat(14, minmax(0, 1fr));
}

.row-events.one-week-rows {
  grid-template-columns: 120px repeat(7, minmax(0, 1fr));
}

.cell {
  position: relative;
  background: var(--weekday-bg);
  overflow: hidden;
}

.cell .day-number {
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: 0.76rem;
  color: var(--weekday-text);
  font-weight: 500;
}

.cell .week-number {
  position: absolute;
  bottom: 2px;
  right: 6px;
  font-size: 1rem;
  color: var(--muted);
  font-weight: 500;
  z-index: 3;
  text-shadow: 0 0 3px rgba(255, 255, 255, 0.8);
}

.theme-dark .cell .week-number {
  text-shadow: 0 0 3px rgba(0, 0, 0, 0.5);
}

.disabled {
  background: var(--disabled-day-bg);
}

.weekend {
  background: var(--weekend-bg);
}

.weekend .day-number {
  color: var(--weekend-text);
}

.cell.past-day::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.15);
  pointer-events: none;
}

.theme-dark .cell.past-day::after {
  background: rgba(0, 0, 0, 0.5);
}

.cell.current-day {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
  z-index: 1;
}

.cell.current-day .day-number {
  color: var(--accent);
  font-weight: 700;
}


.month {
  background: var(--month-col);
  font-weight: 700;
  padding-right: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  color: var(--text);
  box-shadow: inset -1px 0 0 var(--grid-line);
  grid-column: 1;
  /* Always place month labels in the first column */
}

.month .month-year {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
}

.event {
  position: relative;
  z-index: 2;
  background: linear-gradient(135deg, var(--event-bg1), var(--event-bg2));
  border: 1px solid var(--event-border);
  color: var(--event-text);
  padding: 2px 7px;
  border-radius: 9px;
  font-size: 0.74rem;
  line-height: 1.2;
  align-self: start;
  max-height: 22px;
  margin-top: calc(25px + var(--lane, 0) * 26px);
  pointer-events: auto;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  box-shadow: var(--event-shadow);
}

.event.continues-prev {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

.event.continues-next {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

@media (max-width: 960px) {

  .grid-row.linear,
  .row-events.linear {
    grid-template-columns: 100px repeat(31, minmax(0, 1fr));
  }

  .grid-row.day-aligned,
  .row-events.day-aligned,
  .grid-header.day-aligned {
    grid-template-columns: 100px repeat(37, minmax(0, 1fr));
  }

  .grid-row.week-rows,
  .row-events.week-rows,
  .grid-header.week-rows {
    grid-template-columns: 100px repeat(28, minmax(0, 1fr));
  }

  .grid-row.two-week-rows,
  .row-events.two-week-rows,
  .grid-header.two-week-rows {
    grid-template-columns: 100px repeat(14, minmax(0, 1fr));
  }

  .grid-row.one-week-rows,
  .row-events.one-week-rows,
  .grid-header.one-week-rows {
    grid-template-columns: 100px repeat(7, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .year-layout {
    grid-template-columns: 1fr;
  }

  .calendar-filters {
    max-width: none;
    min-width: 0;
    position: static;
  }

  .grid-row.linear,
  .row-events.linear {
    grid-template-columns: 88px repeat(31, minmax(0, 1fr));
  }

  .grid-row.day-aligned,
  .row-events.day-aligned,
  .grid-header.day-aligned {
    grid-template-columns: 88px repeat(37, minmax(0, 1fr));
  }

  .grid-row.week-rows,
  .row-events.week-rows,
  .grid-header.week-rows {
    grid-template-columns: 88px repeat(28, minmax(0, 1fr));
  }

  .grid-row.two-week-rows,
  .row-events.two-week-rows,
  .grid-header.two-week-rows {
    grid-template-columns: 88px repeat(14, minmax(0, 1fr));
  }

  .grid-row.one-week-rows,
  .row-events.one-week-rows,
  .grid-header.one-week-rows {
    grid-template-columns: 88px repeat(7, minmax(0, 1fr));
  }
}

/* Refresh button loading state */
#refreshButton.refreshing {
  pointer-events: none;
  opacity: 0.6;
}

#refreshButton.refreshing::before {
  content: "⟳ ";
  display: inline-block;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}