:root {
  --bg: #1d1f23;
  --panel: #2a2d33;
  --panel-2: #353941;
  --text: #e8e8ea;
  --muted: #9aa0a6;
  --accent: #6ea8fe;
  --border: #404653;
  --avail: #3fa45b;
  --avail-hi: #58c976;
  --unavail: #b14848;
  --recurring: #2f6b41;
  --hover: #4a5060;
  --shadow: 0 2px 8px rgba(0,0,0,0.3);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

h1 { font-size: 18px; margin: 0; }
h2 { font-size: 16px; margin: 24px 0 8px; }

button, input, select {
  font: inherit;
  color: inherit;
}

button {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 12px;
  cursor: pointer;
}
button:hover { background: var(--hover); }
button.danger { background: #5a2828; border-color: #7a3838; }
button.danger:hover { background: #722; }

input, select {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 8px;
}

label {
  display: inline-flex;
  flex-direction: column;
  font-size: 12px;
  color: var(--muted);
  gap: 2px;
}
label > input, label > select { color: var(--text); }

/* Topbar */
.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
}
.topbar-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}
.who {
  display: flex;
  gap: 12px;
  align-items: end;
  margin-left: auto;
  flex-wrap: wrap;
}

/* Tabs */
.tabs {
  max-width: 1200px;
  margin: 12px auto 0;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  flex-wrap: nowrap;
  -webkit-overflow-scrolling: touch;
}
.tab {
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  padding: 8px 14px;
  color: var(--muted);
  flex-shrink: 0;
}
.tab.active {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text);
  position: relative;
  top: 1px;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.controls {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.hint { color: var(--muted); font-size: 12px; margin: 4px 0 8px; }
.status { color: var(--muted); font-size: 12px; min-height: 16px; }

/* Weekly grid (my availability) */
.weekly-grid {
  display: grid;
  grid-template-columns: 50px repeat(7, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  user-select: none;
  max-width: 700px;
}
.weekly-grid .h, .weekly-grid .hour-label, .weekly-grid .day-label {
  background: var(--panel);
  text-align: center;
  font-size: 11px;
  color: var(--muted);
  padding: 3px 0;
}
.weekly-grid .cell {
  background: var(--panel-2);
  height: 18px;
  cursor: pointer;
}
.weekly-grid .cell:hover { background: var(--hover); }
.weekly-grid .cell.on { background: var(--avail); }
.weekly-grid .cell.on:hover { background: var(--avail-hi); }

/* Day override grid — switches column count by breakpoint so rows have evenly-sized cells. */
.day-grid {
  display: grid;
  grid-template-columns: repeat(24, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  user-select: none;
  margin-top: 4px;
  max-width: 900px;
}
@media (max-width: 720px) {
  .day-grid { grid-template-columns: repeat(12, 1fr); }
}
@media (max-width: 380px) {
  .day-grid { grid-template-columns: repeat(8, 1fr); }
}
.hour-group {
  display: flex;
  flex-direction: column;
  background: var(--border);
  gap: 1px;
  min-width: 0;
}
.hour-group .hour-label {
  background: var(--panel);
  font-size: 10px;
  text-align: center;
  padding: 2px 0;
  color: var(--muted);
}
.hour-group .cell {
  background: var(--panel-2);
  height: 32px;
  cursor: pointer;
  position: relative;
}
.hour-group .cell.recurring { background: var(--recurring); }
.hour-group .cell.override-yes { background: var(--avail); outline: 2px solid var(--avail-hi); outline-offset: -2px; }
.hour-group .cell.override-no  { background: var(--unavail); outline: 2px solid #d76; outline-offset: -2px; }
.hour-group .cell:hover { filter: brightness(1.2); }
/* Find times heatmap */
.find-grid {
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 8px;
  overflow-x: auto;
}
.find-grid .head, .find-grid .row-label, .find-grid .cell {
  background: var(--panel);
  font-size: 11px;
  text-align: center;
  padding: 3px 4px;
  white-space: nowrap;
}
.find-grid .row-label {
  text-align: right;
  color: var(--muted);
  padding-right: 6px;
  position: sticky;
  left: 0;
  z-index: 1;
}
.find-grid > .head:first-child {
  position: sticky;
  left: 0;
  z-index: 2;
}
.find-grid .cell {
  cursor: pointer;
  min-height: 22px;
}
.find-grid .cell.lvl-0 { background: var(--panel-2); }
.find-grid .cell.lvl-some { background: #4d3a3a; }
.find-grid .cell.lvl-most { background: #6e7e3a; }
.find-grid .cell.lvl-all  { background: var(--avail); color: #fff; font-weight: 600; }
.find-grid .cell.selected { outline: 2px solid var(--accent); outline-offset: -2px; }

.legend {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
}
.swatch {
  display: inline-block;
  width: 16px;
  height: 12px;
  border: 1px solid var(--border);
  margin-right: 2px;
  vertical-align: middle;
}
.swatch.s-none { background: var(--panel-2); }
.swatch.s-some { background: #4d3a3a; }
.swatch.s-most { background: #6e7e3a; }
.swatch.s-all  { background: var(--avail); }

.detail {
  margin-top: 12px;
  padding: 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  display: none;
}
.detail.show { display: block; }
.detail h3 { margin: 0 0 8px; font-size: 14px; }
.detail .names { display: flex; flex-wrap: wrap; gap: 6px; }
.detail .name {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 6px;
  font-size: 12px;
}
.detail .name.yes { border-color: var(--avail); color: #b8f0c4; }
.detail .name.no { border-color: var(--unavail); color: #f0b8b8; opacity: 0.75; }

.gm-toggle {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  color: var(--text);
  font-size: 13px;
  white-space: nowrap;
}

.ntfy-topic {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
}
.ntfy-topic code {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 6px 8px;
  font-size: 12px;
  word-break: break-all;
  user-select: all;
}
#ntfy-btn { font-size: 16px; padding: 6px 10px; }

/* Manage tab */
#manage-users, #manage-modules {
  display: grid;
  gap: 6px;
}
.manage-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
  align-items: center;
  background: var(--panel);
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
}
.row-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  white-space: nowrap;
}
.manage-row input { width: 100%; }
.add-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.add-row input { flex: 1; }

/* My modules */
#my-modules-list {
  display: grid;
  gap: 6px;
}
.module-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel);
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
}
.module-row label {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 14px;
}

/* Tour */
.tour[hidden] { display: none; }
.tour {
  position: fixed;
  inset: 0;
  pointer-events: none;
}
.tour-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 200;
  /* No pointer-events: clicks pass through to highlighted page elements. */
}
.tour-modal {
  position: absolute;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%);
  width: min(460px, calc(100% - 32px));
  max-height: calc(100vh - 48px);
  overflow: auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow);
  padding: 16px 18px;
  pointer-events: auto;
  z-index: 240;
}
.tour-modal h2 { margin: 0 0 6px; font-size: 16px; }
.tour-modal p { margin: 0 0 12px; color: var(--text); }
.tour-buttons {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.tour-buttons #tour-next {
  background: var(--accent);
  color: #111;
  border-color: transparent;
  font-weight: 600;
}
.tour-buttons #tour-next:hover { filter: brightness(1.1); }
.tour-buttons #tour-next:disabled {
  background: var(--panel-2);
  color: var(--muted);
  cursor: not-allowed;
  filter: none;
}
.tour-progress {
  margin-top: 10px;
  font-size: 11px;
  color: var(--muted);
  text-align: center;
}

.tour-highlight {
  position: relative;
  z-index: 220;
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
  animation: tour-pulse 1.6s ease-in-out infinite;
}

.tour-body { color: var(--text); font-size: 13px; }
.tour-body p { margin: 0 0 8px; }
.tour-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}
.tour-form label {
  color: var(--text);
  font-size: 13px;
  gap: 3px;
}
.tour-form input, .tour-form select {
  padding: 7px 9px;
  font-size: 14px;
}
.tour-form button.primary {
  background: var(--accent);
  color: #111;
  border-color: transparent;
  font-weight: 600;
  padding: 8px 14px;
  margin-top: 6px;
  align-self: flex-start;
}
.tour-form button.primary:hover { filter: brightness(1.1); }

.tour-tabs {
  display: flex;
  gap: 4px;
  margin: 6px 0 0;
  border-bottom: 1px solid var(--border);
}
.tour-tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 0;
}
.tour-tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
@keyframes tour-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(110, 168, 254, 0.55); }
  50%      { box-shadow: 0 0 0 10px rgba(110, 168, 254, 0); }
}

/* Toast */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: 4px;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
  z-index: 100;
  max-width: 80%;
}
.toast.show { opacity: 1; }
.toast.err { border-color: var(--unavail); }

/* ===== Mobile ===== */
@media (max-width: 640px) {
  main { padding: 12px; }
  .topbar { padding: 10px 12px; }
  .topbar-row { gap: 10px; }
  h1 { font-size: 16px; }
  h2 { font-size: 15px; }

  /* More readable labels & inputs */
  label { font-size: 13px; color: var(--text); }
  input, select { padding: 8px 10px; font-size: 15px; }

  .who {
    margin-left: 0;
    width: 100%;
    gap: 8px;
  }
  .who > label { flex: 1 1 140px; min-width: 0; }
  .who > label > select { width: 100%; }
  #new-user-btn { flex: 0 0 auto; padding: 8px 12px; }

  /* Tabs: 2x2 grid of bordered buttons — no horizontal scroll */
  .tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    overflow: visible;
  }
  .tab {
    flex: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    text-align: center;
    padding: 10px 8px;
    top: 0;
  }
  .tab.active {
    background: var(--panel-2);
    border-color: var(--accent);
    color: var(--text);
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .controls > label { flex: 0 0 auto; min-width: 0; }
  .controls > label > input,
  .controls > label > select { width: 100%; }
  .controls > button { width: 100%; padding: 10px; }

  .weekly-grid .cell { height: 24px; }

  .manage-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .manage-row input:not([type="checkbox"]),
  .manage-row select { width: 100%; }
  .row-actions {
    width: 100%;
    justify-content: space-between;
  }

  .add-row { flex-wrap: wrap; }

  .tour-modal {
    bottom: 12px;
    width: calc(100% - 16px);
    padding: 14px 14px 12px;
  }

  .legend { flex-wrap: wrap; }
}