:root {
  --bg: #0b0d10;
  --card-bg: #16191d;
  --input-bg: #1e2126;
  --text: #e8eaed;
  --subtext: #9aa0a6;
  --accent: #4f9dff;
  --border: #2a2e35;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: 16px;
}

.card {
  max-width: 480px;
  margin: 0 auto;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
}
.card.wide { max-width: 720px; }

h1 { font-size: 1.4rem; margin: 0 0 4px; }
.subtitle { color: var(--subtext); margin: 0 0 20px; font-size: 0.9rem; }
.event-description { color: var(--text); margin: 0 0 12px; font-size: 0.9rem; }

form label {
  display: block;
  margin-bottom: 14px;
  font-size: 0.85rem;
  color: var(--subtext);
}
form input, form select {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  font-size: 1rem;
}

.day-mode-toggle { display: flex; gap: 8px; margin: 4px 0 12px; }
.mode-btn {
  flex: 1;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: none;
  color: var(--subtext);
  cursor: pointer;
  font-size: 0.85rem;
}
.mode-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.error-text { color: #ff6b6b; font-size: 0.85rem; margin: -8px 0 14px; }

.weekday-filter { margin: 4px 0 14px; }
.weekday-filter-label {
  display: block;
  font-size: 0.8rem;
  color: var(--subtext);
  margin-bottom: 6px;
}
.weekday-checks { display: flex; gap: 4px; flex-wrap: wrap; }
.weekday-check-label {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text);
  margin: 0;
  cursor: pointer;
}
.weekday-check-label input {
  width: auto;
  margin: 0;
}

.day-row { display: flex; gap: 8px; margin-bottom: 8px; align-items: center; }
.day-row input { flex: 1; }
.remove-day {
  background: none;
  border: 1px solid var(--border);
  color: var(--subtext);
  border-radius: 6px;
  padding: 8px 12px;
  cursor: pointer;
}
#add-day {
  background: none;
  border: 1px dashed var(--border);
  color: var(--accent);
  border-radius: 8px;
  padding: 10px;
  width: 100%;
  margin: 8px 0 16px;
  cursor: pointer;
  font-size: 0.9rem;
}
.time-row { display: flex; gap: 12px; }
.time-row label { flex: 1; }

button.primary {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #06111f;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
}

.grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), 1fr);
  gap: 4px;
  margin: 16px 0;
}
.day-header {
  font-size: 0.75rem;
  text-align: center;
  color: var(--subtext);
  padding-bottom: 4px;
}
.slot-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  text-align: center;
  padding: 8px 4px;
  min-height: 44px;
  border-radius: 6px;
  font-size: 0.75rem;
  background: rgba(79, 157, 255, calc(var(--intensity, 0) * 0.7));
  border: 1px solid var(--border);
  cursor: pointer;
  user-select: none;
  touch-action: none; /* let a drag paint cells instead of scrolling the page */
}
.slot-cell.empty { visibility: hidden; cursor: default; }
.slot-cell.mine {
  border: 2px solid var(--accent);
  font-weight: 600;
}
.slot-cell.full {
  background: rgba(56, 193, 114, 0.85);
  border-color: #38c172;
}
.slot-cell.full.mine { border-color: var(--accent); }

.slot-time { line-height: 1.1; }

.avatar-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px;
  min-height: 14px;
}
.avatar {
  width: 14px;
  height: 14px;
  line-height: 14px;
  border-radius: 3px;
  font-size: 0.55rem;
  font-weight: 700;
  color: #06111f;
  text-align: center;
}

.legend {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 0.75rem;
  color: var(--subtext);
  margin: 0 0 12px;
}
.legend-swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid var(--border);
}
.legend-swatch.full { background: rgba(56, 193, 114, 0.85); border-color: #38c172; }
.legend-swatch.partial { background: rgba(79, 157, 255, 0.5); }

.organizer-panel {
  margin-top: 16px;
  padding: 14px;
  background: var(--input-bg);
  border-radius: 8px;
}
.organizer-panel p { margin: 0 0 10px; font-size: 0.9rem; }

.confirmed-banner {
  background: #1b3a24;
  color: #7be08a;
  padding: 16px;
  border-radius: 8px;
  text-align: center;
  font-weight: 600;
  margin-bottom: 12px;
}

.share-row { display: flex; gap: 8px; }
.share-row input {
  flex: 1;
  margin-top: 0;
  font-size: 0.85rem;
}
.share-row button {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--accent);
  color: #06111f;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.share-hint {
  color: var(--subtext);
  font-size: 0.8rem;
  text-align: center;
  margin-top: 16px;
}

.site-footer {
  text-align: center;
  margin-top: 24px;
  padding-bottom: 8px;
}
.site-footer a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--subtext);
  text-decoration: none;
  font-size: 0.8rem;
}
.site-footer a:hover { color: var(--accent); }
.site-footer svg { width: 15px; height: 15px; fill: currentColor; }

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f8;
    --card-bg: #ffffff;
    --input-bg: #ffffff;
    --text: #1a1d21;
    --subtext: #5f6368;
    --border: #e0e2e6;
  }
}