* { margin: 0; padding: 0; box-sizing: border-box; }
  :root {
    --bg: #0a0e16; --card: #111726; --chat-bg: #0d1320;
    --text: #e8e6e0; --muted: #8b93a7;
    --bubble-ai: #1a2233; --accent: #e8a33d; --accent2: #d97706;
    --border: #232d42; --system-bg: #1d2740; --system-text: #cdb98a;
    --think-bg: #2b2011; --think-text: #eab96a; --input-bg: #0f1524;
    --shadow: rgba(0,0,0,.5);
    --header-grad: linear-gradient(135deg, #131b2d, #1b2540);
    --header-text: #f5f2ea; --header-sub: rgba(245,242,234,.72);
    --overlay: rgba(4,7,14,.72); --btn-text: #241503; --user-text: #241503;
    --user-bubble: linear-gradient(135deg, #f0b35c, #d97706);
    --danger: #e5484d;
  }
  [data-theme="light"] {
    --bg: #efe9db; --card: #fdfaf2; --chat-bg: #f8f4ea;
    --text: #2b2b30; --muted: #767d8c;
    --bubble-ai: #efe8d8; --accent: #b7791f; --accent2: #92400e;
    --border: #e0d7c2; --system-bg: #f3e9d3; --system-text: #7a5518;
    --think-bg: #faf0da; --think-text: #96601a; --input-bg: #fffdf6;
    --shadow: rgba(60,50,30,.14);
    --header-grad: linear-gradient(135deg, #e7dcc0, #dccba4);
    --header-text: #3a2f1a; --header-sub: rgba(58,47,26,.75);
    --overlay: rgba(70,55,30,.45); --btn-text: #fffdf6; --user-text: #fffdf6;
    --user-bubble: linear-gradient(135deg, #b45309, #92400e);
    --danger: #c92a35;
  }
  html, body { height: 100%; }
  body {
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    background: var(--bg); color: var(--text);
    display: flex; justify-content: center;
  }
  #app {
    width: min(920px, 100vw); height: 100vh;
    display: flex; flex-direction: column;
    background: var(--card); box-shadow: 0 0 40px var(--shadow);
  }
  header {
    display: flex; align-items: center; gap: 10px;
    padding: 13px 20px; background: var(--header-grad);
    color: var(--header-text); border-bottom: 2px solid var(--accent);
    flex-shrink: 0;
  }
  header h1 { font-size: 18px; letter-spacing: 1px; white-space: nowrap; }
  header .sub { font-size: 12px; color: var(--header-sub); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .icon-btn {
    width: 34px; height: 34px; border-radius: 50%;
    border: 1px solid color-mix(in srgb, var(--header-text) 35%, transparent);
    cursor: pointer; background: color-mix(in srgb, var(--header-text) 14%, transparent);
    color: var(--header-text); font-size: 15px; transition: background .2s;
    flex-shrink: 0;
  }
  .icon-btn:hover { background: color-mix(in srgb, var(--header-text) 26%, transparent); }
  .icon-btn:disabled { opacity: .4; cursor: not-allowed; }
  #score { font-size: 12px; margin-left: auto; white-space: nowrap; opacity: .9; }
  #chat { flex: 1; overflow-y: auto; padding: 18px 20px; scroll-behavior: smooth; }
  .msg { display: flex; gap: 10px; margin-bottom: 14px; animation: fadeIn .25s ease; }
  @keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
  .msg .avatar {
    width: 36px; height: 36px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 17px; flex-shrink: 0; user-select: none;
    background: color-mix(in srgb, var(--ac, var(--accent)) 22%, var(--card));
    border: 1px solid color-mix(in srgb, var(--ac, var(--accent)) 45%, transparent);
    box-shadow: 0 1px 3px var(--shadow);
  }
  .msg .body { max-width: min(78%, 640px); display: flex; flex-direction: column; }
  .msg .name { font-size: 12px; color: var(--ac, var(--muted)); font-weight: 700; margin-bottom: 3px; padding: 0 4px; }
  .msg .bubble {
    padding: 9px 13px; border-radius: 14px; font-size: 14px; line-height: 1.65;
    white-space: pre-wrap; word-break: break-word;
    background: var(--bubble-ai); color: var(--text);
    box-shadow: 0 1px 2px var(--shadow);
  }
  .msg.ai .bubble { border-top-left-radius: 4px; background: color-mix(in srgb, var(--ac, #64748b) 14%, var(--bubble-ai)); }
  .msg.user { flex-direction: row-reverse; }
  .msg.user .body { align-items: flex-end; }
  .msg.user .name { text-align: right; }
  .msg.user .bubble { background: var(--user-bubble); color: var(--user-text); border-top-right-radius: 4px; font-weight: 500; }
  .msg.system { justify-content: center; }
  .msg.system .bubble { background: var(--system-bg); color: var(--system-text); font-size: 13px; padding: 5px 14px; border-radius: 20px; text-align: center; }
  .msg.think { justify-content: center; }
  .msg.think .bubble { background: var(--think-bg); color: var(--think-text); font-size: 12px; padding: 4px 12px; border-radius: 14px; }
  .msg.vote, .msg.elim { justify-content: center; }
  .banner {
    padding: 9px 16px; border-radius: 12px; font-size: 14px; font-weight: 700;
    animation: pop .35s cubic-bezier(.2, 1.4, .4, 1); box-shadow: 0 2px 8px var(--shadow);
  }
  .banner.vote { background: color-mix(in srgb, var(--accent) 18%, var(--card)); color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); }
  .banner.elim { background: color-mix(in srgb, var(--danger) 18%, var(--card)); color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent); }
  @keyframes pop { 0% { transform: scale(.75); opacity: 0; } 100% { transform: scale(1); opacity: 1; } }
  .msg.ai.typing .bubble { color: var(--muted); font-style: italic; }
  .msg.ai.typing .bubble::after { content: "▍"; margin-left: 2px; animation: blink 1s steps(2) infinite; }
  @keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
  #inputArea {
    background: var(--card); padding: 12px 20px; border-top: 1px solid var(--border);
    display: flex; gap: 10px; align-items: center; flex-shrink: 0;
  }
  #inputPrompt { font-size: 13px; color: var(--muted); white-space: nowrap; max-width: 190px; overflow: hidden; text-overflow: ellipsis; flex-shrink: 0; }
  #userInput {
    flex: 1; padding: 10px 14px; border: 1px solid var(--border); border-radius: 12px;
    font-size: 14px; background: var(--input-bg); color: var(--text);
    outline: none; transition: border-color .2s;
  }
  #userInput:focus { border-color: var(--accent); }
  #sendBtn {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: var(--btn-text); border: none; padding: 10px 22px;
    border-radius: 12px; cursor: pointer; font-size: 14px; font-weight: 600;
    transition: filter .2s;
  }
  #sendBtn:hover:not(:disabled) { filter: brightness(1.08); }
  #sendBtn:disabled, #userInput:disabled { opacity: .45; cursor: not-allowed; }
  .modal-overlay {
    position: fixed; inset: 0; z-index: 100; background: var(--overlay);
    display: flex; align-items: center; justify-content: center; padding: 16px;
  }
  .modal-overlay.hidden { display: none; }
  .modal {
    width: min(760px, 96vw); max-height: 92vh; overflow-y: auto;
    background: var(--card); border: 1px solid var(--border);
    border-radius: 18px; padding: 22px; box-shadow: 0 20px 60px var(--shadow);
    animation: pop .3s ease;
  }
  .modal-title { font-size: 18px; margin-bottom: 16px; }
  .field { margin-bottom: 16px; }
  .field > label { display: block; font-size: 13px; font-weight: 700; color: var(--muted); margin-bottom: 6px; }
  .hint-inline { font-weight: 400; color: var(--accent); }
  .field input[type="text"], .field input[type="password"], .field input[type="number"], .field select {
    width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: 10px;
    background: var(--input-bg); color: var(--text); font-size: 13px; outline: none;
  }
  .field input:focus, .field select:focus { border-color: var(--accent); }
  .mode-toggle { display: flex; gap: 8px; }
  .mode-btn {
    flex: 1; padding: 9px 10px; border-radius: 10px;
    border: 1px solid var(--border); background: var(--input-bg);
    color: var(--text); font-size: 13px; cursor: pointer; transition: all .2s;
  }
  .mode-btn.active {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-color: transparent; color: var(--btn-text); font-weight: 700;
  }
  .count-row { display: flex; align-items: center; gap: 12px; }
  .stepper {
    width: 34px; height: 34px; border-radius: 10px;
    border: 1px solid var(--border); background: var(--input-bg);
    color: var(--text); font-size: 18px; cursor: pointer;
  }
  .stepper:hover { border-color: var(--accent); color: var(--accent); }
  .count-num { font-size: 22px; font-weight: 800; min-width: 28px; text-align: center; }
  .player-list { display: flex; flex-direction: column; gap: 10px; max-height: 320px; overflow-y: auto; padding-right: 4px; }
  .player-card {
    display: flex; gap: 10px; align-items: flex-start;
    background: var(--input-bg); border: 1px solid var(--border);
    border-radius: 12px; padding: 10px;
  }
  .p-avatar {
    width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center; font-size: 20px;
    background: color-mix(in srgb, var(--accent) 16%, var(--card));
  }
  .p-fields { flex: 1; display: flex; flex-direction: column; gap: 7px; min-width: 0; }
  .p-row1 { display: flex; gap: 8px; }
  .p-row1 .p-name { flex: 1; min-width: 0; }
  .p-row1 .p-preset { width: 128px; flex-shrink: 0; }
  .p-chips { display: flex; flex-wrap: wrap; gap: 5px; }
  .chip {
    font-size: 11px; padding: 3px 9px; border-radius: 999px;
    border: 1px solid var(--border); background: transparent;
    color: var(--muted); cursor: pointer; transition: all .15s;
  }
  .chip:hover { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
  .p-custom { width: 100%; }
  #lengthSlider { width: 100%; accent-color: var(--accent); }
  .length-labels { display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); margin: 2px 0 6px; }
  .fine-row { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); flex-wrap: wrap; }
  .fine-row input { width: 90px; flex-shrink: 0; }
  #voteEvery { width: 160px; }
  .modal-actions { text-align: center; margin-top: 18px; }
  .primary-btn {
    padding: 12px 44px; font-size: 15px; font-weight: 700;
    color: var(--btn-text); border: none; border-radius: 12px; cursor: pointer;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent);
    transition: filter .2s;
  }
  .primary-btn:hover { filter: brightness(1.08); }
  .modal-tip { font-size: 12px; color: var(--muted); text-align: center; margin-top: 12px; line-height: 1.6; }
  @media (max-width: 640px) {
    header .sub { display: none; }
    #inputPrompt { display: none; }
    .p-row1 { flex-wrap: wrap; }
    .p-row1 .p-preset { width: 100%; }
  }