:root {
  --bg-1: #f4f8f6;
  --bg-2: #dceee4;
  --bg-3: #c3e3d3;
  --fg: #1f3d33;
  --accent: #3f8f6e;
  --accent-dark: #2e6e54;
  --ok: #3f8f6e;
  --ok-bg: #d4edce;
  --warn: #e0b94e;
  --no: #c97a6d;
  --card-bg: #ffffff;
  --border: #dbe8e1;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--bg-1) 0%, var(--bg-2) 50%, var(--bg-3) 100%);
  color: var(--fg);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, Arial, sans-serif;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 80px;
}

header.app-header {
  text-align: center;
  margin-bottom: 32px;
}

header.app-header h1 {
  font-size: 1.6rem;
  margin: 0 0 6px;
  color: var(--accent-dark);
}

header.app-header p {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.75;
}

.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 6px 24px rgba(31, 61, 51, 0.08);
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin: 16px 0 6px;
}

label:first-child {
  margin-top: 0;
}

input[type="text"],
input[type="number"],
input[type="url"],
input[type="datetime-local"],
textarea,
select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  background: #fbfdfc;
  color: var(--fg);
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.hint {
  font-size: 0.78rem;
  opacity: 0.65;
  margin-top: 4px;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

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

.btn:active {
  transform: scale(0.98);
}

.btn.secondary {
  background: transparent;
  color: var(--accent-dark);
  border: 1px solid var(--accent);
}

.btn.secondary:hover {
  background: var(--bg-2);
}

.btn.small {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: 8px;
}

.btn.danger {
  background: var(--no);
}

.btn.block {
  width: 100%;
  text-align: center;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.error-box {
  background: #fdeceb;
  border: 1px solid var(--no);
  color: #8a3f33;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.88rem;
  margin: 12px 0;
}

.success-box {
  background: var(--ok-bg);
  border: 1px solid var(--ok);
  color: #2d5a3f;
  border-radius: 10px;
  padding: 14px;
  font-size: 0.9rem;
  margin: 12px 0;
}

.share-url-box {
  display: flex;
  gap: 8px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  align-items: center;
  margin-bottom: 10px;
}

.share-url-box input {
  border: none;
  background: transparent;
  flex: 1;
  font-size: 0.85rem;
  padding: 0;
}

.copy-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  min-height: 40px;
  flex-shrink: 0;
}

.loading {
  text-align: center;
  padding: 40px 0;
  opacity: 0.6;
}

.footer-note {
  text-align: center;
  font-size: 0.78rem;
  opacity: 0.6;
  margin-top: 24px;
}

a {
  color: var(--accent-dark);
}

/* ===== 座席グリッド（管理画面） ===== */

.stats-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.stat-box {
  flex: 1;
  min-width: 100px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}

.stat-box .num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-dark);
}

.stat-box .label {
  font-size: 0.75rem;
  opacity: 0.7;
}

.table-block {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 14px;
  background: var(--bg-1);
}

.table-block h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--accent-dark);
}

.seat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
}

.seat-cell {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  font-size: 0.82rem;
}

.seat-cell .seat-no {
  font-weight: 700;
  font-size: 0.75rem;
  opacity: 0.6;
  margin-bottom: 4px;
}

.seat-cell .seat-name {
  font-weight: 600;
  word-break: break-all;
  min-height: 1.2em;
}

.seat-cell.empty .seat-name {
  opacity: 0.4;
}

.seat-cell .seat-actions {
  display: flex;
  gap: 4px;
  margin-top: 6px;
}

.seat-cell .seat-actions button {
  flex: 1;
  font-size: 0.7rem;
  padding: 4px 4px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
}

.seat-cell.checked-in {
  border-color: var(--ok);
  background: var(--ok-bg);
}

.checkin-mark-small {
  font-size: 0.78rem;
}

/* ===== 参加者用チェックイン画面 ===== */

.search-guide {
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.75;
  margin-bottom: 12px;
}

.profile-card h2 {
  margin: 0 0 4px;
  color: var(--accent-dark);
}

.seat-info-box {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  margin: 12px 0;
  text-align: center;
}

.seat-info-box .seat-label {
  font-size: 0.8rem;
  opacity: 0.7;
}

.seat-info-box .seat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent-dark);
}

.checkin-btn {
  display: block;
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 12px;
}

.checkin-btn.checked {
  background: var(--ok);
  cursor: default;
}

.checkin-btn:disabled {
  background: #a8b8b0;
  cursor: not-allowed;
}

.checkin-btn.pulse {
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(63, 143, 110, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(63, 143, 110, 0); }
  100% { box-shadow: 0 0 0 0 rgba(63, 143, 110, 0); }
}

.checkin-done-msg {
  text-align: center;
  font-size: 0.85rem;
  color: var(--accent-dark);
  margin-top: 8px;
}

.candidate-list .candidate-title {
  font-size: 0.85rem;
  opacity: 0.75;
  margin-bottom: 8px;
}

.candidate-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 8px;
  font-size: 0.95rem;
  cursor: pointer;
}

.candidate-btn:hover {
  background: var(--bg-1);
}

.no-result {
  text-align: center;
  opacity: 0.7;
  padding: 20px 0;
  font-size: 0.9rem;
}

.accordion-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 4px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  margin-bottom: 8px;
}

.accordion-content.open {
  max-height: 2000px;
}

.accordion-inner {
  padding: 10px 4px;
}

table.name-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

table.name-table th,
table.name-table td {
  border: 1px solid var(--border);
  padding: 8px 6px;
  text-align: left;
}

table.name-table th {
  background: var(--bg-2);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.card {
  animation: fadeUp 0.4s ease-out;
}

/* ===== レスポンシブ ===== */
@media (max-width: 480px) {
  .wrap {
    padding: 20px 12px 60px;
  }

  header.app-header h1 {
    font-size: 1.3rem;
  }

  .card {
    padding: 16px;
    border-radius: 12px;
  }

  .btn {
    padding: 13px 18px;
    font-size: 0.95rem;
  }

  .share-url-box {
    flex-wrap: wrap;
  }

  .share-url-box input {
    flex: 1 1 100%;
    min-width: 0;
    font-size: 0.8rem;
  }

  .share-url-box .copy-btn {
    flex: 0 0 auto;
    margin-left: auto;
  }

  .seat-grid {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  }
}