:root { color-scheme: dark; font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif; color: #d7e0e5; background: #17212b; }
* { box-sizing: border-box; }
body { margin: 0; }
a { color: #b6c5cd; text-decoration: none; }
a:hover { color: #fff; }
button, input { font: inherit; }
button { border: 1px solid #4a5965; border-radius: 5px; padding: 8px 14px; background: #2b3a47; color: #ecf0f3; cursor: pointer; }
button:hover:enabled { background: #405362; }
button:disabled { opacity: .45; cursor: not-allowed; }
:focus-visible { outline: 2px solid #e0ac75; outline-offset: 3px; }
.play-header { background: #202c38; padding: 20px max(24px, calc((100vw - 1200px) / 2)); display: flex; justify-content: space-between; align-items: center; gap: 20px; font-size: 12px; }
.brand { font-size: 21px; font-weight: 600; color: #fff; }
.brand small { font-size: 10px; margin-left: 12px; letter-spacing: 2px; color: #9eafb9; }
.client { max-width: 1200px; margin: auto; padding: 24px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
h1 { font-size: 18px; margin: 0 0 6px; font-weight: 500; }
.toolbar p { margin: 0; color: #92a6b4; font: 12px monospace; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; font-size: 12px; }
#connection-status { color: #d6b388; margin-right: 8px; }
#connection-status[data-state="open"] { color: #8ed4ac; }
#connect, #send { background: #aa5738; border-color: #bf6b49; }
.game-output { height: max(260px, calc(100dvh - 300px)); min-height: 260px; overflow: auto; overflow-wrap: anywhere; white-space: pre-wrap; font: 15px/1.7 "Sarasa Mono SC", "Noto Sans Mono CJK SC", Menlo, Consolas, monospace; background: #101820; border: 1px solid #34424e; border-radius: 7px 7px 0 0; padding: 22px; tab-size: 4; scrollbar-color: #4d6070 #101820; }
.client-message { color: #a4b8c6; }
.client-command { color: #91c797; }
#game-form { display: flex; gap: 12px; align-items: center; padding: 13px 16px; border: 1px solid #34424e; border-top: 0; background: #202c38; border-radius: 0 0 7px 7px; }
#game-form label { font-size: 12px; color: #dbb081; white-space: nowrap; }
#game-input { min-width: 0; flex: 1; background: #17212b; color: #fff; border: 1px solid #4a5965; border-radius: 4px; padding: 10px; font-size: 16px; }
#game-input::placeholder { color: #92a4b1; }
#send { font-size: 13px; flex-shrink: 0; }
.client-footer { display: flex; justify-content: space-between; gap: 16px; font-size: 11px; color: #a4b4bf; margin: 12px 0; }
.client-footer label { white-space: nowrap; }
.connection-tip { color: #94a7b4; font-size: 12px; line-height: 1.8; }
.connection-tip strong { font-weight: 500; color: #c0ced7; }
@media (max-width: 650px) {
  .play-header { padding: 16px; }
  .brand small { display: block; margin: 3px 0 0; font-size: 8px; }
  .client { padding: 18px 12px; }
  .toolbar { align-items: flex-start; flex-direction: column; gap: 14px; }
  .actions { gap: 7px; }
  .game-output { padding: 14px; font-size: 13px; height: max(260px, calc(100dvh - 355px)); }
  #game-form { padding: 10px; gap: 8px; }
  #game-form label { display: none; }
  .client-footer { font-size: 10px; }
}

#secret-dialog { width: min(420px, calc(100vw - 32px)); padding: 24px; border: 1px solid #4a5965; border-radius: 10px; background: #202c38; color: #d7e0e5; }
#secret-dialog::backdrop { background: #0009; }
#secret-dialog h2 { font-size: 19px; margin: 0 0 14px; }
#secret-dialog p { font-size: 13px; line-height: 1.7; color: #a4b4bf; }
#secret-input { width: 100%; padding: 12px; border: 1px solid #4a5965; border-radius: 4px; background: #17212b; color: #fff; font-size: 16px; }
.secret-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 20px; }