.room-tabs { display: flex; gap: 0; margin-bottom: 20px; border: 1.5px solid var(--border); border-radius: var(--r); overflow: hidden; }
.room-tab {
  flex: 1; padding: 12px 8px; text-align: center; cursor: pointer;
  font-size: 13px; font-weight: 700; color: var(--ink3);
  background: #fafaf8; transition: all .15s; border: none;
  font-family: 'Noto Sans JP', sans-serif;
}
.room-tab.room-tab:not(:last-child) { border-right: 1.5px solid var(--border); }
.room-tab.active { background: var(--accent); color: #fff; }

.size-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
@media (min-width: 480px) { .size-grid { grid-template-columns: repeat(4, 1fr); } }
.size-card {
  border: 2px solid var(--border); border-radius: var(--r);
  padding: 12px 8px; text-align: center; cursor: pointer;
  transition: all .15s; background: #fafaf8;
}
.size-card:hover    { border-color: var(--accent); }
.size-card.selected { border-color: var(--accent); background: var(--accent-light, #fff3ec); box-shadow: 0 0 0 1px var(--accent); }
.size-card.selected .size-name { color: var(--accent); }
.size-card.size-name { font-size: 13px; font-weight: 700; color: var(--ink); }
.size-dim  { font-family: 'DM Mono', monospace; font-size: 11px; color: var(--ink3); margin-top: 2px; }
.size-use  { font-size:12px; color: var(--ink3); margin-top: 3px; }

.total-box {
  background: var(--primary);
  border-radius: var(--r-lg); padding: 22px 16px;
  margin-bottom: 14px; position: relative; overflow: hidden;
}
.total-box::before {
  content: ''; position: absolute; top: -40px; right: -40px;
  width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(107,159,212,.25), transparent 70%);
  pointer-events: none;
}
.tb-amount { font-family: 'Plus Jakarta Sans', var(--font-body, 'Noto Sans JP'), sans-serif; font-size: clamp(28px,7vw,48px); font-weight: 900; color: #fff; line-height: 1.1; margin-bottom: 4px; }
.tb-amount em { color:var(--primary-mid); font-style: normal; font-size: .55em; }
.meta-3 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
@media (min-width: 480px) { .meta-3 { grid-template-columns: repeat(3, 1fr); } }
.meta-box { background: var(--white); border: 1px solid var(--border); border-radius: var(--r); padding: 12px; text-align: center; }
.meta-label { font-size:12px; color: var(--ink3); margin-bottom: 4px; }
.meta-val   { font-family: 'DM Mono', monospace; font-size: 14px; font-weight: 500; color: var(--accent); }