:root {
  --bg: #f6f8fa;
  --card: #fff;
  --text: #1a1a1a;
  --muted: #5c6670;
  --primary: #1e4d8c;
  --primary-hover: #163a6b;
  --border: #d8dee4;
  --danger: #b42318;
  --ok: #067647;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem;
}

.container-wide { max-width: 1100px; }

header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

header .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header a { color: var(--primary); text-decoration: none; font-weight: 600; }

h1 { font-size: 1.5rem; margin: 0 0 0.5rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

label {
  display: block;
  font-weight: 600;
  margin: 0.75rem 0 0.25rem;
}

input, select, textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
}

textarea { min-height: 100px; resize: vertical; }

.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.65rem 1.2rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { background: var(--primary-hover); }

.btn-secondary {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-danger { background: var(--danger); }

.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.muted { color: var(--muted); font-size: 0.9rem; }

.alert {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin: 1rem 0;
}

.alert-error { background: #fef3f2; color: var(--danger); border: 1px solid #fecdca; }
.alert-success { background: #ecfdf3; color: var(--ok); border: 1px solid #abefc6; }
.alert-info { background: #eff8ff; color: #175cd3; border: 1px solid #b2ddff; }

.entry-code {
  font-size: 2rem;
  letter-spacing: 0.2em;
  font-weight: 700;
  text-align: center;
  padding: 1rem;
  background: #eff8ff;
  border-radius: 8px;
}

.slot-list {
  display: grid;
  gap: 0.5rem;
  max-height: 320px;
  overflow-y: auto;
}

.slot-item {
  padding: 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.slot-item.selected {
  border-color: var(--primary);
  background: #eff8ff;
}

video {
  width: 100%;
  max-width: 480px;
  background: #000;
  border-radius: 8px;
}

.video-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.5rem;
  text-align: left;
}

.hidden { display: none !important; }

#login-section, #admin-panel { max-width: 1100px; margin: 0 auto; padding: 1rem; }

.form-group {
  margin: 1rem 0;
}

.calendar-section {
  margin-bottom: 1.5rem;
}

.calendar-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0.5rem 0 1rem;
}

.calendar-controls {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.btn-small {
  padding: 0.4rem 0.8rem;
  font-size: 0.9rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.btn-small:hover {
  background: var(--primary-hover);
}

.calendar {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.calendar-table {
  width: 100%;
  border-collapse: collapse;
}

.calendar-table th {
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 0.75rem;
  font-weight: 600;
  border: none;
}

.calendar-cell {
  aspect-ratio: 1;
  padding: 0.5rem;
  border: 1px solid var(--border);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  background: var(--card);
}

.calendar-cell.available {
  cursor: pointer;
  color: var(--primary);
  font-weight: 600;
}

.calendar-cell.available:hover {
  background: #eff8ff;
  border-color: var(--primary);
}

.calendar-cell.unavailable {
  color: var(--muted);
  background: #f9fafb;
}

.calendar-cell.other-month {
  color: #ddd;
  background: #f9fafb;
}

.calendar-cell.selected {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.calendar-loading {
  padding: 1rem;
  text-align: center;
}

.time-section {
  margin-top: 1.5rem;
  padding: 1rem;
  background: #f9fafb;
  border-radius: 6px;
}

.time-section label {
  margin-bottom: 0.5rem;
}

.staff-status {
  padding: 0.5rem 0.8rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.staff-status-select {
  padding: 0.35rem 0.6rem;
  font-size: 0.9rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}

.staff-status-select:hover {
  background: #f9fafb;
}