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

:root {
  --bg: #f5f5f0;
  --surface: #ffffff;
  --border: #e0e0d8;
  --text: #1a1a1a;
  --muted: #666;
  --accent: #2d6a4f;
  --accent-light: #d8f3dc;
  --accent-hover: #1b4332;
  --cell-empty: #f0ede8;
  --cell-full: #1b4332;
  --cell-selected: #52b788;
  --danger: #c62828;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.06);
}

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* Responsive show/hide */
.grid-desktop { display: block; }
.grid-mobile  { display: none; }
.hide-mobile  { display: block; }

@media (max-width: 640px) {
  .grid-desktop { display: none; }
  .grid-mobile  { display: block; }
  .hide-mobile  { display: none; }
}

/* Flash */
.flash {
  padding: 12px 20px;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
}
.flash--notice { background: var(--accent-light); color: var(--accent-hover); }
.flash--alert  { background: #fdecea; color: var(--danger); }

/* Page layouts */
.page { max-width: 960px; margin: 0 auto; padding: 32px 16px 64px; }
.page--centered { display: flex; align-items: flex-start; justify-content: center; padding-top: 80px; }
.page--centered .card { width: 100%; max-width: 480px; }

.layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
@media (max-width: 680px) {
  .layout { grid-template-columns: 1fr; }
  .page { padding: 16px 12px 48px; }
  .event-title { font-size: 22px; }
}

/* Card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.card__title { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.card__subtitle { font-size: 14px; color: var(--muted); margin-bottom: 20px; }

/* Event header */
.event-header { margin-bottom: 28px; }
.event-title { font-size: 28px; font-weight: 800; line-height: 1.2; margin-bottom: 6px; }
.event-meta { font-size: 14px; color: var(--muted); margin-bottom: 16px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 11px; font-weight: 600; background: var(--accent-light); color: var(--accent-hover); vertical-align: middle; }
.admin-badge { display: inline-block; padding: 3px 10px; border-radius: 99px; font-size: 11px; font-weight: 700; background: #fff3cd; color: #856404; border: 1px solid #ffc107; margin-bottom: 8px; }
.admin-hint { font-size: 12px; color: var(--muted); margin-top: 8px; }
.share-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.share-label { font-size: 13px; color: var(--muted); white-space: nowrap; }
.share-url {
  flex: 1; min-width: 180px; max-width: 360px;
  padding: 6px 10px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 13px; color: var(--muted); background: var(--bg); cursor: text;
}

/* Section title */
.section-title { font-size: 16px; font-weight: 600; margin-bottom: 12px; }

/* Grid */
.grid-wrapper { user-select: none; }
.grid-scroll { overflow-x: auto; }

.avail-grid {
  border-collapse: collapse;
  table-layout: fixed;
}
.avail-grid th, .avail-grid td { border: 1px solid var(--border); }

.grid-corner { width: 44px; }
.grid-day {
  width: 52px; text-align: center; padding: 4px 2px;
  font-size: 11px; font-weight: 600; color: var(--muted);
  background: var(--bg);
}
.grid-day__dow { text-transform: uppercase; letter-spacing: .04em; }
.grid-day__date { font-size: 12px; color: var(--text); font-weight: 700; }

.grid-day__actions {
  display: flex;
  justify-content: center;
  gap: 2px;
  margin-top: 3px;
}

.day-sel-btn {
  background: none;
  border: none;
  font-size: 10px;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  padding: 1px 3px;
  border-radius: 3px;
  line-height: 1.4;
}
.day-sel-btn:hover { background: var(--accent-light); }

.grid-hour {
  font-size: 11px; color: var(--muted); padding: 0 6px;
  text-align: right; white-space: nowrap; background: var(--bg);
  height: 28px;
}

.grid-cell {
  width: 52px; height: 28px; cursor: pointer;
  background: color-mix(in srgb, var(--cell-full) calc(var(--fill) * 100%), var(--cell-empty));
  transition: background 0.1s;
  position: relative;
}
.grid-cell:hover { outline: 2px solid var(--accent); outline-offset: -2px; z-index: 1; }
.grid-cell--selected {
  background: var(--cell-selected) !important;
  outline: 2px solid var(--accent-hover);
  outline-offset: -2px;
  z-index: 2;
}
.grid-cell--picked {
  background: var(--accent) !important;
  outline: 2px solid var(--accent-hover);
  outline-offset: -2px;
  z-index: 2;
}
.grid-cell--picked-hint {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  z-index: 1;
}

.cell-count {
  display: block; text-align: center; font-size: 10px; font-weight: 700;
  color: rgba(255,255,255,0.85); line-height: 28px; pointer-events: none;
}

/* Legend */
.legend { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; font-size: 12px; color: var(--muted); }
.legend__bar {
  flex: 1; height: 12px; border-radius: 4px; max-width: 160px;
  background: linear-gradient(to right, var(--cell-empty), var(--cell-full));
  border: 1px solid var(--border);
}

/* Participants list */
.participants-list { margin-top: 16px; font-size: 14px; color: var(--muted); }
.participants-list summary { cursor: pointer; font-weight: 500; color: var(--text); }
.participants-list ul { margin-top: 8px; padding-left: 18px; }
.participants-list li { margin: 4px 0; display: flex; align-items: center; justify-content: space-between; gap: 8px; }

.btn-remove {
  background: none;
  border: 1px solid transparent;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}
.btn-remove:hover { color: var(--danger); border-color: var(--danger); background: #fdecea; }
.participant-count { font-size: 12px; color: var(--muted); }

/* Form */
.form { display: flex; flex-direction: column; gap: 16px; }
.form__group { display: flex; flex-direction: column; gap: 4px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.form label { font-size: 13px; font-weight: 600; color: var(--text); }
.form input[type="text"],
.form input[type="date"],
.form select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color .15s;
}
.form input:focus, .form select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); }

.hint { font-size: 12px; color: var(--muted); }
.form__group--inline { flex-direction: row; align-items: center; gap: 8px; }
.form__group--inline input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }
.form__group--inline label { font-size: 14px; font-weight: 500; cursor: pointer; }

/* Buttons */
.btn {
  padding: 10px 18px;
  border: none; border-radius: 6px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  transition: background .15s;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-hover); }
.btn--small { padding: 6px 12px; font-size: 13px; background: var(--surface); border: 1px solid var(--border); color: var(--text); }
.btn--small:hover { background: var(--bg); }

/* Errors */
/* Proposed times banner (mobile top) */
.proposed-banner {
  display: none;
  background: var(--accent-light);
  border: 1px solid #b7e4c7;
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 20px;
}
.proposed-banner__label { font-size: 12px; font-weight: 700; color: var(--accent-hover); margin-bottom: 8px; text-transform: uppercase; letter-spacing: .05em; }
.proposed-banner__slots { display: flex; flex-wrap: wrap; gap: 6px; }
.proposed-pill { display: inline-block; padding: 4px 10px; background: var(--accent); color: #fff; border-radius: 99px; font-size: 13px; font-weight: 500; }

@media (max-width: 640px) {
  .proposed-banner { display: block; }
}

/* Mobile day-cards */
.day-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 12px;
  overflow: hidden;
}
.day-card__header {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.day-card__actions { margin-left: auto; display: flex; gap: 6px; }
.day-card__dow  { font-weight: 700; font-size: 15px; }
.day-card__date { font-size: 13px; color: var(--muted); }
.day-card__slots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 8px;
  padding: 12px;
}

/* Slot tap buttons */
.slot-btn {
  display: block; width: 100%;
  padding: 12px 4px;
  border: 1.5px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font-size: 14px; font-weight: 500;
  text-align: center;
  cursor: pointer;
  transition: background .1s, border-color .1s, color .1s;
  -webkit-tap-highlight-color: transparent;
}
.slot-btn:active { background: var(--accent-light); }
.slot-btn--selected {
  background: var(--cell-selected);
  border-color: var(--accent-hover);
  color: #fff;
}
.slot-btn--picked-hint {
  border-color: var(--accent);
  border-style: dashed;
}
.slot-btn--selected.slot-btn--picked-hint {
  border-style: solid;
}

/* Name row above grid */
.name-row { margin-bottom: 4px; }
.name-row .form { gap: 12px; }
.submit-btn { width: 100%; }

.picked-list { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.picked-list li { display: flex; justify-content: space-between; align-items: baseline; padding: 8px 12px; background: var(--accent-light); border-radius: 6px; font-size: 14px; }
.picked-list li strong { color: var(--accent-hover); }
.picked-list li span { color: var(--accent); font-weight: 500; }

.errors {
  background: #fdecea; border: 1px solid #f5c6cb;
  border-radius: 6px; padding: 10px 16px;
  list-style: disc; padding-left: 28px;
  font-size: 13px; color: var(--danger);
}