/* group-divider 共通スタイル */
:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --danger: #ef4444;
  --success: #10b981;
  --bg: #f3f4f6;
  --card: #ffffff;
  --text: #111827;
  --text-sub: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 16px;
}

.container-wide {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

h1 {
  font-size: 1.5rem;
  margin: 0 0 16px 0;
}

h2 {
  font-size: 1.2rem;
  margin: 24px 0 12px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.btn {
  display: inline-block;
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  background: var(--primary);
  color: white;
  transition: background 0.15s;
  min-height: 48px;
}

.btn:hover { background: var(--primary-dark); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-big {
  width: 100%;
  font-size: 1.1rem;
  padding: 16px;
}

.btn-secondary {
  background: white;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-secondary:hover { background: #f0f7ff; }

.btn-danger {
  background: var(--danger);
}
.btn-danger:hover { background: #dc2626; }

.btn-small {
  padding: 8px 14px;
  font-size: 0.875rem;
  min-height: 36px;
}

.input, .select {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: white;
  min-height: 48px;
}
.input:focus, .select:focus {
  outline: none;
  border-color: var(--primary);
}

.label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.help {
  color: var(--text-sub);
  font-size: 0.875rem;
  margin: 8px 0 0 0;
}

.error {
  color: var(--danger);
  margin-top: 8px;
  font-weight: 600;
}

.info {
  background: #eff6ff;
  border-left: 4px solid var(--primary);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 8px;
}

.success {
  background: #ecfdf5;
  border-left: 4px solid var(--success);
  padding: 12px 16px;
  margin: 16px 0;
  border-radius: 8px;
}

/* モーダル */
.modal-bg {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}

.modal {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  max-width: 400px;
  width: 100%;
  text-align: center;
}

.modal h3 { margin-top: 0; }

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}
.modal-actions .btn { flex: 1; }

/* スクロール可能な大きめモーダル（ラウンド詳細用） */
.modal.modal-scroll {
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  padding: 0;
  text-align: left;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-scroll .modal-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 20px 24px 16px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}

.modal-scroll .modal-header-text { flex: 1; min-width: 0; }
.modal-scroll .modal-header h3 { margin: 0 0 4px 0; }
.modal-scroll .modal-header p { margin: 0; }

.modal-close-x {
  flex-shrink: 0;
  appearance: none;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  min-height: 40px;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.modal-close-x:hover {
  background: white;
  border-color: var(--text-sub);
}
.modal-close-x:focus-visible {
  outline: 3px solid #93c5fd;
  outline-offset: 2px;
}

.modal-scroll .modal-body {
  flex: 1 1 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 16px 24px 8px;
}

.modal-scroll .modal-footer {
  padding: 16px 24px 20px;
  margin-top: 0;
  border-top: 1px solid var(--border);
  background: white;
}

/* スマホ：上下フチに張り付かせて画面いっぱい使う */
@media (max-width: 600px) {
  .modal.modal-scroll {
    max-height: 95vh;
  }
  .modal-scroll .modal-header,
  .modal-scroll .modal-body,
  .modal-scroll .modal-footer {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* テーブル */
.table {
  width: 100%;
  border-collapse: collapse;
}
.table th, .table td {
  padding: 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.table th {
  font-size: 0.875rem;
  color: var(--text-sub);
}
.table tr.deleted td {
  color: var(--text-sub);
  text-decoration: line-through;
}

/* 参加者URLボックス */
.url-box {
  display: flex;
  gap: 8px;
  align-items: center;
}
.url-box .input {
  flex: 1;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.875rem;
  background: #f9fafb;
}

/* QRコード */
.qr-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
}
.qr-wrap canvas, .qr-wrap img {
  border: 8px solid white;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

/* グループ表示（参加者） */
.my-group-card {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
  padding: 32px;
  border-radius: var(--radius);
  text-align: center;
  margin-bottom: 16px;
}
.my-group-card .my-round-label {
  display: inline-block;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 4px 12px;
  margin-bottom: 12px;
  background: rgba(255,255,255,0.2);
  border-radius: 999px;
  letter-spacing: 0.02em;
}
.my-group-card .my-number {
  font-size: 0.875rem;
  opacity: 0.9;
}
.my-group-card .my-group {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  margin: 8px 0;
}
.my-group-card .my-group-label {
  font-size: 0.875rem;
  opacity: 0.9;
}

.member-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.member-list li {
  padding: 12px 16px;
  background: white;
  border-radius: 8px;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 12px;
}
.member-list li .num {
  font-weight: 700;
  color: var(--primary);
  min-width: 36px;
}
.member-list li.me {
  border: 2px solid var(--primary);
  background: #eff6ff;
}

/* グループ一覧（主催者） */
.groups-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.group-card {
  background: white;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.group-card-title {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--primary);
}
.group-card .member {
  padding: 4px 0;
  font-size: 0.95rem;
}
.group-card .member .num {
  display: inline-block;
  min-width: 28px;
  color: var(--text-sub);
  font-weight: 600;
}

/* 拡大表示モード */
.display-mode body { background: #0f172a; color: white; }
.display-wrap {
  min-height: 100vh;
  padding: 24px 24px 80px; /* 下部余白でスクロール末尾も呼吸させる */
  background: #0f172a;
  color: white;
}
.display-wrap h1 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 24px;
}
.display-groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}
.display-group {
  background: rgba(255,255,255,0.08);
  border: 2px solid rgba(255,255,255,0.15);
  border-radius: 16px;
  padding: 20px;
}
.display-group-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: #60a5fa;
  text-align: center;
  margin-bottom: 12px;
}
.display-group .member {
  font-size: 1.4rem;
  padding: 6px 0;
}
.display-group .member .num {
  display: inline-block;
  min-width: 48px;
  color: #94a3b8;
  font-weight: 600;
}

/* History (rounds) */
.round-item {
  padding: 12px 16px;
  background: white;
  border-radius: var(--radius);
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.round-item:hover { background: #f9fafb; }
.round-item .round-meta { font-size: 0.875rem; color: var(--text-sub); }

/* スマホ最適化 */
@media (max-width: 600px) {
  h1 { font-size: 1.3rem; }
  .container { padding: 12px; }
  .card { padding: 16px; }
  .my-group-card .my-group { font-size: 3rem; }
}

/* フォーカスのアクセシビリティ */
.btn:focus-visible, .input:focus-visible, .select:focus-visible {
  outline: 3px solid #93c5fd;
  outline-offset: 2px;
}

.flex-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.flex-col { display: flex; flex-direction: column; gap: 12px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.text-center { text-align: center; }
.text-sub { color: var(--text-sub); font-size: 0.875rem; }
.bold { font-weight: 700; }
.hidden { display: none !important; }

/* パンくず（トップに戻るリンク） */
.breadcrumb {
  margin-bottom: 12px;
}
.breadcrumb-link {
  display: inline-block;
  color: var(--primary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 8px;
  min-height: 40px;
  line-height: 24px;
}
.breadcrumb-link:hover {
  background: #eff6ff;
  text-decoration: underline;
}
.breadcrumb-link:focus-visible {
  outline: 3px solid #93c5fd;
  outline-offset: 2px;
}

/* 作成した部屋リスト */
.created-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}
.created-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: #f9fafb;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
}
.created-item-main {
  flex: 1;
  min-width: 200px;
}
.created-item-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  word-break: break-all;
}
.created-item-meta {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-top: 2px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.created-item-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
@media (max-width: 600px) {
  .created-item-actions { width: 100%; }
  .created-item-actions .btn { flex: 1; }
}