.lobby-main {
  width: min(100% - 32px, 960px);
  display: grid;
  align-content: center;
  min-height: calc(100dvh - 53px);
  margin: 0 auto;
  padding: clamp(32px, 7vh, 72px) 0 max(32px, env(safe-area-inset-bottom));
}
.lobby-intro { max-width: 600px; margin-bottom: var(--s8); }
.lobby-eyebrow { margin: 0 0 8px; color: var(--accent); font-size: 12px; font-weight: 700; letter-spacing: .1em; }
.lobby-intro h1 { max-width: 12em; margin: 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.15; letter-spacing: -.03em; }
.lobby-intro p { max-width: 46em; margin: 14px 0 0; color: var(--text-2); font-size: 16px; }

.auth-stage { width: min(100%, 850px); display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr); gap: clamp(40px, 8vw, 92px); align-items: center; margin: 0 auto; }
.auth-context { padding: var(--s5) 0; }
.auth-context h1 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(38px, 5vw, 58px); font-weight: 600; line-height: .98; letter-spacing: -.055em; }
.auth-context > p:not(.lobby-eyebrow) { max-width: 30em; margin: var(--s5) 0 0; color: var(--text-2); font-size: 16px; word-break: keep-all; }
.auth-principles { display: grid; gap: var(--s3); margin: var(--s8) 0 0; padding: 0; }
.auth-principles div { padding-left: 14px; border-left: 1px solid var(--line-strong); }
.auth-principles dt { color: var(--text); font-size: 13px; font-weight: 700; }
.auth-principles dd { margin: 2px 0 0; color: var(--text-3); font-size: 13px; line-height: 1.55; word-break: keep-all; }
.auth-card { padding: var(--s6); }
.auth-card h1 { margin: 0; font-size: 25px; }
.auth-card > p { margin: 8px 0 var(--s5); color: var(--text-2); }
.auth-form, .profile-form { display: grid; gap: var(--s4); }
.auth-note { margin: 0; color: var(--text-3); font-size: 13px; }

.lobby-workspace { display: grid; grid-template-columns: minmax(0, .9fr) minmax(480px, 1.4fr); gap: var(--s5); align-items: stretch; }
.profile-panel { display: grid; align-content: start; gap: var(--s5); padding: var(--s5); }
.profile-summary { display: grid; gap: 5px; padding-bottom: var(--s5); border-bottom: 1px solid var(--line); }
.profile-summary .account-label { color: var(--text-3); font-size: 12px; }
.profile-summary strong { font-size: 18px; }
.compliance-note { margin: 0; color: var(--text-3); font-size: 12px; }

.room-panel { overflow: hidden; }
.room-tabs { display: grid; grid-template-columns: 1fr 1fr; padding: 5px; border-bottom: 1px solid var(--line); background: #101914; }
.room-tab { min-height: 42px; color: var(--text-3); border: 0; border-radius: 6px; background: transparent; font-weight: 700; }
.room-tab[aria-selected="true"] { color: var(--text); background: var(--surface-3); }
.room-flow { display: grid; gap: var(--s5); padding: var(--s5); }
.room-flow h2 { margin: 0; font-size: 22px; letter-spacing: -.02em; }
.room-flow > p { margin: -10px 0 0; color: var(--text-2); }
.room-flow-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s3); }
.room-flow .btn { min-height: 48px; }
.room-code { letter-spacing: .14em; font-variant-numeric: tabular-nums; }
.lobby-notice { margin-top: var(--s4); }
.lobby-notice:empty { display: none; }

.connection-line { display: inline-flex; align-items: center; gap: 7px; color: var(--text-3); font-size: 12px; }
.connection-line[data-state="ready"] .status-dot { background: var(--success); }
.connection-line[data-state="connecting"] .status-dot { background: var(--warning); }
.connection-line[data-state="error"] .status-dot { background: var(--danger); }

@media (max-width: 820px) {
  .lobby-main { align-content: start; min-height: auto; padding-top: var(--s8); }
  .auth-stage { grid-template-columns: 1fr; gap: var(--s5); }
  .auth-context { padding: 0; }
  .auth-context h1 { font-size: clamp(34px, 9vw, 48px); }
  .auth-principles { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: var(--s5); gap: var(--s2); }
  .auth-card { width: min(100%, 480px); }
  .lobby-intro { margin-bottom: var(--s6); }
  .lobby-workspace { grid-template-columns: 1fr; }
  .profile-panel { grid-template-columns: 1fr auto; align-items: start; }
  .profile-panel .profile-form { grid-column: 1 / -1; }
  .compliance-note { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .lobby-main { width: min(100% - 24px, 960px); padding-top: var(--s6); }
  .lobby-intro h1 { font-size: 29px; }
  .lobby-intro p { font-size: 15px; }
  .auth-context h1 { font-size: 36px; }
  .auth-principles { grid-template-columns: 1fr; }
  .profile-panel { display: grid; padding: var(--s4); }
  .room-flow { padding: var(--s4); }
  .room-flow-grid { grid-template-columns: 1fr; }
  .account-chip { display: none; }
}