.chamber-view {
  --chamber-accent: #a98a59;
  --chamber-accent-soft: rgba(169, 138, 89, .13);
  --chamber-human: #253633;
  display: none;
  position: relative;
  min-height: 0;
  height: calc(100vh - 76px);
  grid-template-columns: 240px minmax(0, 1fr);
  overflow: hidden;
  background: var(--bg);
}
.chamber-view.active { display: grid; }
.chamber-login { grid-column: 1 / -1; display: flex; align-items: center; justify-content: center; min-height: 60vh; padding: 24px; }
.chamber-login[hidden] { display: none !important; }
.chamber-login-card { width: 100%; max-width: 380px; text-align: center; }
.chamber-login-card h1 { margin: 0 0 8px; font-size: 24px; }
.chamber-login-card > p:not(.eyebrow):not(.chamber-login-error) { color: var(--muted); font-size: 14px; line-height: 1.5; margin: 0 0 24px; }
#chamberLoginForm { display: flex; flex-direction: column; gap: 12px; }
#chamberLoginForm input, #chamberLoginForm button { box-sizing: border-box; width: 100%; padding: 11px 14px; border-radius: 8px; font-size: 14px; }
#chamberLoginForm input { border: 1px solid var(--line); outline: 0; background: var(--panel); color: inherit; }
#chamberLoginForm input:focus { border-color: var(--chamber-accent); }
#chamberLoginForm button { border: 0; background: var(--chamber-accent); color: #090d13; cursor: pointer; font-weight: 600; }
.chamber-login-error { min-height: 20px; color: var(--red); font-size: 13px; margin: 12px 0 0; }
.chamber-content { display: grid; grid-column: 1 / -1; min-height: 0; grid-template-columns: 240px minmax(0, 1fr); }
.chamber-content[hidden] { display: none !important; }
.chamber-sidebar { display: grid; min-height: 0; grid-template-rows: auto minmax(0, 1fr) auto; border-right: 1px solid var(--line); background: var(--panel); }
.chamber-sidebar header { display: flex; align-items: center; justify-content: space-between; padding: 18px 16px 13px; border-bottom: 1px solid var(--line); }
.chamber-sidebar h1, .chamber-room-head h1 { margin: 3px 0 0; font: 500 23px/1.2 Georgia, "Times New Roman", serif; }
.chamber-mobile-close { display: none; }
.chamber-topic-list { min-height: 0; overflow-y: auto; padding: 8px; }
.chamber-topic { display: grid; width: 100%; gap: 7px; margin-bottom: 6px; padding: 11px 10px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--text); text-align: left; cursor: pointer; }
.chamber-topic:hover { background: var(--panel2); border-color: var(--line); }
.chamber-topic.active { background: var(--chamber-accent-soft); border-color: var(--chamber-accent); }
.chamber-topic strong { overflow: hidden; font-size: 12px; font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.chamber-topic-meta { display: flex; align-items: center; justify-content: space-between; gap: 8px; color: var(--muted); font-size: 10px; }
.chamber-phase { display: inline-flex; align-items: center; min-height: 20px; padding: 2px 7px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel2); color: var(--chamber-accent); font: 500 9px/1 var(--detail-font, inherit); letter-spacing: .08em; text-transform: uppercase; }
.chamber-list-state { padding: 24px 10px; color: var(--muted); font-size: 11px; line-height: 1.6; text-align: center; }
.chamber-new-button { margin: 10px; min-height: 38px; border: 1px solid var(--chamber-accent); border-radius: 8px; background: transparent; color: var(--chamber-accent); font-weight: 600; cursor: pointer; }
.chamber-main { display: grid; min-width: 0; min-height: 0; position: relative; background: var(--bg); }
.chamber-topic-picker { display: none; }
.chamber-empty { display: grid; place-content: center; padding: 30px; color: var(--muted); text-align: center; }
.chamber-empty span { color: var(--chamber-accent); font-size: 10px; letter-spacing: .16em; }
.chamber-empty h2 { margin: 12px 0 8px; color: var(--text); font: 500 29px/1.25 Georgia, "Times New Roman", serif; }
.chamber-empty p { margin: 0; font-size: 12px; }
.chamber-room { display: grid; min-height: 0; grid-template-rows: auto minmax(0, 1fr) auto; }
.chamber-room[hidden], .chamber-empty[hidden] { display: none !important; }
.chamber-room-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; padding: 18px 22px 15px; border-bottom: 1px solid var(--line); background: var(--panel); }
.chamber-title-line { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; }
.chamber-room-head p { max-width: 760px; margin: 8px 0 0; color: var(--muted); font-size: 11px; line-height: 1.6; white-space: pre-wrap; }
.chamber-export { flex: 0 0 auto; padding: 7px 10px; border: 1px solid var(--line); border-radius: 7px; color: var(--muted); font-size: 10px; text-decoration: none; }
.chamber-export:hover { border-color: var(--chamber-accent); color: var(--chamber-accent); }
.chamber-timeline { min-height: 0; overflow-y: auto; padding: 22px clamp(16px, 4vw, 54px); }
.chamber-no-messages { display: grid; height: 100%; place-content: center; color: var(--muted); font-size: 12px; text-align: center; }
.chamber-message { display: grid; justify-items: start; margin: 0 0 18px; }
.chamber-message.human { justify-items: end; }
.chamber-message.system { justify-items: stretch; }
.chamber-message-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 7px; margin: 0 4px 5px; color: var(--muted); font-size: 10px; }
.chamber-message-meta strong { color: var(--text); font-weight: 600; }
.chamber-message-body { max-width: min(76%, 720px); padding: 11px 13px; border: 1px solid var(--line); border-radius: 4px 11px 11px 11px; background: var(--panel); color: var(--text); font-size: 13px; line-height: 1.65; white-space: pre-wrap; overflow-wrap: anywhere; }
.chamber-message.human .chamber-message-body { border-color: #435a54; border-radius: 11px 4px 11px 11px; background: var(--chamber-human); color: #edf3f0; }
.chamber-message.system .chamber-message-body { max-width: none; padding: 7px 10px; border: 0; border-radius: 6px; background: var(--panel2); color: var(--muted); text-align: center; font-size: 11px; }
.chamber-mention { display: inline-flex; padding: 2px 6px; border-radius: 999px; background: var(--chamber-accent-soft); color: var(--chamber-accent); font-size: 9px; }
.chamber-composer { position: relative; display: grid; gap: 8px; padding: 12px 18px 16px; border-top: 1px solid var(--line); background: var(--panel); }
.chamber-composer textarea { width: 100%; min-height: 72px; resize: vertical; padding: 11px 12px; border: 1px solid var(--line); border-radius: 9px; outline: 0; background: var(--panel2); color: var(--text); font: 400 13px/1.55 var(--detail-font, inherit); }
.chamber-composer textarea:focus { border-color: var(--chamber-accent); }
.chamber-composer > div:last-child { display: flex; align-items: center; justify-content: space-between; gap: 10px; color: var(--muted); font-size: 10px; }
.chamber-composer button, .chamber-modal footer button:last-child { min-width: 74px; min-height: 34px; border: 1px solid var(--chamber-accent); border-radius: 7px; background: var(--chamber-accent); color: #171510; font-weight: 600; cursor: pointer; }
.chamber-composer button:disabled { opacity: .55; cursor: wait; }
.chamber-mention-menu { position: absolute; z-index: 4; left: 18px; bottom: calc(100% - 12px); width: min(280px, calc(100% - 36px)); padding: 6px; border: 1px solid var(--line); border-radius: 9px; background: var(--panel); box-shadow: 0 10px 28px rgba(0, 0, 0, .2); }
.chamber-mention-option { display: flex; width: 100%; justify-content: space-between; padding: 8px 9px; border: 0; border-radius: 6px; background: transparent; color: var(--text); font-size: 11px; cursor: pointer; }
.chamber-mention-option:hover, .chamber-mention-option.active { background: var(--chamber-accent-soft); }
.chamber-mention-option small { color: var(--muted); }
.chamber-sidebar-scrim { display: none; }
.chamber-modal { width: min(520px, calc(100% - 28px)); padding: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--text); }
.chamber-modal::backdrop { background: rgba(5, 8, 10, .68); }
.chamber-modal form { display: grid; gap: 15px; padding: 19px; }
.chamber-modal header, .chamber-modal footer { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.chamber-modal h2 { margin: 3px 0 0; font: 500 23px/1.2 Georgia, "Times New Roman", serif; }
.chamber-modal header button { border: 0; background: transparent; color: var(--muted); font-size: 23px; cursor: pointer; }
.chamber-modal label { display: grid; gap: 7px; color: var(--muted); font-size: 11px; }
.chamber-modal input, .chamber-modal textarea { width: 100%; padding: 10px 11px; border: 1px solid var(--line); border-radius: 8px; outline: 0; resize: vertical; background: var(--panel2); color: var(--text); font: 400 12px/1.55 var(--detail-font, inherit); }
.chamber-modal input:focus, .chamber-modal textarea:focus { border-color: var(--chamber-accent); }
.chamber-modal footer { justify-content: flex-end; }
.chamber-modal footer button { min-height: 34px; padding: 0 14px; border: 1px solid var(--line); border-radius: 7px; background: transparent; color: var(--muted); cursor: pointer; }
.chamber-form-error { min-height: 16px; margin: 0; color: var(--red); font-size: 11px; }

:root[data-theme="light"] .chamber-view { --chamber-accent: #8b6b3f; --chamber-accent-soft: rgba(139, 107, 63, .1); --chamber-human: #526f67; }
:root[data-theme="light"] .chamber-sidebar, :root[data-theme="light"] .chamber-room-head, :root[data-theme="light"] .chamber-composer, :root[data-theme="light"] .chamber-modal { background: #fff; }
:root[data-theme="light"] .chamber-main { background: #f7f6f2; }

@media (max-width: 700px) {
  .chamber-view { height: calc(100vh - 108px); grid-template-columns: 1fr; }
  .chamber-content { grid-template-columns: 1fr; }
  .chamber-sidebar { position: absolute; z-index: 12; inset: 0 auto 0 0; width: min(86vw, 330px); transform: translateX(-105%); transition: transform .2s ease; box-shadow: 10px 0 30px rgba(0, 0, 0, .28); }
  .chamber-view.sidebar-open .chamber-sidebar { transform: translateX(0); }
  .chamber-mobile-close { display: block; border: 0; background: transparent; color: var(--muted); font-size: 23px; }
  .chamber-topic-picker { display: block; width: calc(100% - 24px); min-height: 38px; margin: 10px 12px 0; padding: 0 11px; overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); color: var(--text); text-align: left; text-overflow: ellipsis; white-space: nowrap; }
  .chamber-sidebar-scrim { position: absolute; z-index: 11; inset: 0; background: rgba(5, 8, 10, .58); }
  .chamber-view.sidebar-open .chamber-sidebar-scrim { display: block; }
  .chamber-room { grid-template-rows: auto minmax(0, 1fr) auto; }
  .chamber-room-head { padding: 13px 14px; }
  .chamber-room-head h1 { font-size: 20px; }
  .chamber-room-head p { display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
  .chamber-timeline { padding: 16px 12px; }
  .chamber-message-body { max-width: 88%; }
  .chamber-composer { padding: 10px 12px 12px; }
  .chamber-composer > div:last-child span { max-width: 210px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}