:root {
  color-scheme: light;
  --ink: #24292a;
  --muted: #727b7d;
  --line: #d9dede;
  --paper: #eef1f0;
  --panel: #ffffff;
  --accent: #9b4736;
  --accent-dark: #713226;
  --soft-accent: #f6ebe7;
  --night: #313d42;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: var(--paper); color: var(--ink); font-family: "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif; }
button, textarea { font: inherit; }
button { cursor: pointer; }
.mansion-shell { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding: 34px 0 28px; }
.mansion-topbar { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; padding-bottom: 22px; }
.mansion-eyebrow { margin: 0 0 8px; color: var(--accent); font-size: 11px; letter-spacing: 1.5px; font-weight: 700; }
h1 { margin: 0; font-size: clamp(25px, 4vw, 40px); line-height: 1.15; font-weight: 700; }
.role-line { margin: 9px 0 0; color: var(--muted); font-size: 13px; }
.mansion-status { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; white-space: nowrap; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.mansion-toolbar { display: grid; grid-template-columns: 1fr 1fr 150px; gap: 1px; border: 1px solid var(--line); background: var(--line); }
.mansion-toolbar > div { min-width: 0; padding: 13px 15px; background: var(--panel); }
.toolbar-label { display: block; margin-bottom: 5px; color: var(--muted); font-size: 11px; }
.mansion-toolbar strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.timer-block { text-align: right; }
.timer-block strong { color: var(--accent); font-variant-numeric: tabular-nums; font-size: 20px; }
.timer-block.warning strong { color: #a66b22; }
.timer-block.expired strong { color: var(--accent-dark); }
.mansion-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 18px; margin-top: 18px; align-items: start; }
.mansion-panel, .clue-panel { border: 1px solid var(--line); background: var(--panel); }
.mansion-chat { min-height: 520px; max-height: 64vh; overflow-y: auto; padding: 27px clamp(16px, 5vw, 52px); }
.message { display: flex; margin: 0 0 20px; }
.message.assistant { justify-content: flex-start; }
.message.user { justify-content: flex-end; }
.bubble { max-width: min(710px, 94%); white-space: pre-wrap; line-height: 1.88; font-size: 15px; }
.assistant .bubble { padding-left: 15px; border-left: 3px solid var(--accent); }
.user .bubble { padding: 11px 14px; border: 1px solid #ead2ca; background: var(--soft-accent); }
.message.pending .bubble { color: var(--muted); }
.suggestion-panel { border-top: 1px solid var(--line); padding: 13px 16px 14px; background: #fffdfc; }
.suggestion-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 9px; }
.suggestion-heading strong { color: var(--accent-dark); font-size: 13px; }
.suggestion-heading span { color: var(--muted); font-size: 12px; }
.suggestion-list { display: flex; flex-wrap: wrap; gap: 7px; }
.suggestion-button { padding: 7px 10px; border: 1px solid #e4c7be; border-radius: 3px; background: #fff; color: #66372e; text-align: left; line-height: 1.45; font-size: 13px; }
.suggestion-button:hover { border-color: var(--accent); background: var(--soft-accent); }
.mansion-composer { border-top: 1px solid var(--line); padding: 16px; background: #fafbfb; }
textarea { display: block; width: 100%; resize: vertical; min-height: 76px; max-height: 220px; padding: 12px 13px; border: 1px solid #cbd2d3; border-radius: 3px; outline: none; background: #fff; color: var(--ink); line-height: 1.6; }
textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(155, 71, 54, .12); }
.composer-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 11px; }
.hint { color: var(--muted); font-size: 12px; }
.primary-button { min-width: 104px; padding: 9px 18px; border: 0; border-radius: 3px; background: var(--accent); color: #fff; font-weight: 700; }
.primary-button:hover { background: var(--accent-dark); }
.primary-button:disabled { cursor: wait; opacity: .55; }
.clue-panel { padding: 19px 17px; }
.clue-heading h2 { margin: 0; font-size: 18px; }
.clue-list { margin: 20px 0 0; padding: 0; list-style: none; }
.clue-list li { padding: 12px 0 12px 26px; border-top: 1px solid var(--line); position: relative; color: #4f595b; line-height: 1.65; font-size: 13px; }
.clue-list li::before { content: ""; position: absolute; left: 2px; top: 17px; width: 9px; height: 9px; border: 2px solid var(--accent); border-radius: 50%; }
.clue-list .empty-clue { padding-left: 0; color: var(--muted); }
.clue-list .empty-clue::before { display: none; }
.mansion-actions { display: flex; justify-content: flex-end; gap: 18px; padding-top: 15px; }
.text-button, .text-link { padding: 5px 0; border: 0; background: transparent; color: var(--muted); font-size: 13px; text-decoration: none; }
.text-button:hover, .text-link:hover { color: var(--accent); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (max-width: 780px) {
  .mansion-layout { grid-template-columns: 1fr; }
  .clue-panel { order: 2; }
}

@media (max-width: 600px) {
  .mansion-shell { width: min(100% - 20px, 1120px); padding-top: 20px; }
  .mansion-topbar { align-items: flex-start; flex-direction: column; gap: 14px; }
  .mansion-toolbar { grid-template-columns: 1fr 1fr; }
  .timer-block { grid-column: span 2; text-align: left; }
  .mansion-chat { min-height: 56vh; padding: 20px 15px; }
  .bubble { max-width: 96%; font-size: 14px; }
  .mansion-composer { padding: 12px; }
  .composer-footer { align-items: flex-start; flex-direction: column; }
  .primary-button { align-self: flex-end; }
  .mansion-actions { justify-content: space-between; }
}