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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: #f5f5f5;
  color: #111;
  font-size: 14px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

header {
  position: relative;
  margin-bottom: 2rem;
}

h1 {
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-align: center;
}

.back-link {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  color: #666;
  text-decoration: none;
  font-size: 0.8rem;
}

.back-link:hover {
  color: #111;
}

/* Management index */
.sync-btn {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  background: #111;
  color: #fff;
  border: none;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  margin-bottom: 2rem;
}

.sync-btn:hover {
  background: #333;
}

.round-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.round-link {
  display: block;
  padding: 0.85rem 1rem;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 500;
  color: #111;
  text-decoration: none;
}

.round-link:hover {
  background: #f0f0f0;
  border-color: #ccc;
}

/* Attendee list */
.attendee-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

.attendee-row {
  display: grid;
  grid-template-columns: 140px 90px 1fr;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  transition: border-color 0.1s, background 0.1s;
}

.attendee-row.confirmed {
  border-color: #16a34a;
  background: #f0fdf4;
}

.attendee-row.absent {
  border-color: #dc2626;
  background: #fef2f2;
}

.attendee-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ticket-code {
  font-family: "SF Mono", "Fira Mono", monospace;
  font-size: 0.8rem;
  color: #666;
}

.actions {
  display: flex;
  gap: 0.4rem;
  justify-content: flex-end;
}

.btn-confirmed,
.btn-absent {
  padding: 0.3rem 0.65rem;
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}

.btn-confirmed {
  border: 1.5px solid #16a34a;
  color: #16a34a;
  background: transparent;
}

.btn-confirmed.active {
  background: #16a34a;
  color: #fff;
}

.btn-absent {
  border: 1.5px solid #dc2626;
  color: #dc2626;
  background: transparent;
}

.btn-absent.active {
  background: #dc2626;
  color: #fff;
}