:root {
  --chat-bg: #14161a;
  --chat-sidebar: #1b1e24;
  --chat-panel: #22262e;
  --chat-input: #20242b;
  --chat-border: #2c313a;
  --chat-border-strong: #3b424d;
  --chat-text: #d7dbe0;
  --chat-muted: #8b93a1;
  --chat-blue: #7aa2f7;
  --chat-blue-dim: #4a5b85;
  --chat-green: #6fbf73;
  --chat-yellow: #d9a13b;
  --chat-red: #e07070;
  --chat-mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --chat-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; overflow: hidden; color: var(--chat-text); background: var(--chat-bg); font: 14px/1.6 var(--chat-ui); }
button, textarea { font: inherit; }
button, a { cursor: pointer; }
a { color: inherit; text-decoration: none; }

.chat-app { display: flex; height: 100vh; }
.chat-sidebar { width: 264px; min-width: 264px; display: flex; flex-direction: column; padding: 14px 12px; border-right: 1px solid var(--chat-border); background: var(--chat-sidebar); }
.chat-brand { display: flex; align-items: center; gap: 10px; padding: 4px 8px 18px; }
.chat-brand-mark { width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid var(--chat-border-strong); border-radius: 7px; color: var(--chat-text); font-size: 10px; font-weight: 800; letter-spacing: -.06em; }
.chat-brand-name { display: block; font-size: 14px; font-weight: 700; }
.chat-brand-sub { display: block; margin-top: 1px; color: var(--chat-muted); font-size: 11px; }
.side-label { padding: 0 9px 7px; color: var(--chat-muted); font-family: var(--chat-mono); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
.module-nav { display: grid; gap: 2px; }
.module-link { display: flex; align-items: center; gap: 8px; padding: 9px 9px; border-radius: 5px; color: var(--chat-muted); font-size: 13px; }
.module-link:hover { color: var(--chat-text); background: var(--chat-panel); }
.module-link.active { color: #fff; background: var(--chat-blue-dim); }
.module-status { width: 6px; height: 6px; flex: 0 0 6px; border-radius: 50%; background: var(--chat-green); }
.module-status.warn { background: var(--chat-yellow); }
.module-status.off { background: var(--chat-muted); }
.module-icon { width: 16px; height: 16px; display: inline-grid; place-items: center; flex: 0 0 16px; color: currentColor; }
.module-icon svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.module-link .module-count { margin-left: auto; color: var(--chat-muted); font-family: var(--chat-mono); font-size: 10px; }
.module-link.active .module-count { color: #d9e3ff; }
.sidebar-spacer { flex: 1; }
.sidebar-status { padding: 11px 9px 3px; border-top: 1px solid var(--chat-border); color: var(--chat-muted); font-size: 11px; }
.sidebar-status-row { display: flex; align-items: center; gap: 7px; color: var(--chat-green); }
.sidebar-status small { display: block; margin-top: 6px; color: var(--chat-muted); font-family: var(--chat-mono); font-size: 9px; }

.chat-main { min-width: 0; flex: 1; display: flex; flex-direction: column; background: var(--chat-bg); }
.home-view { min-height: 0; flex: 1; display: flex; flex-direction: column; }
.app-view { min-height: 0; flex: 1; display: none; overflow-y: auto; background: var(--chat-bg); }
.app-view .module-main { width: min(1180px, calc(100% - 44px)); margin: 0 auto; padding: 34px 0 64px; }
.app-view .module-main .footer-note { padding-bottom: 8px; }
.view-loading, .view-error { width: min(780px, calc(100% - 44px)); margin: 80px auto; color: var(--chat-muted); font-size: 14px; }
.view-error { color: var(--chat-red); }
.chat-topbar { height: 52px; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; border-bottom: 1px solid var(--chat-border); }
.chat-context { color: var(--chat-muted); font-size: 13px; }
.chat-context strong { color: var(--chat-text); font-weight: 600; }
.chat-topmeta { display: flex; align-items: center; gap: 12px; color: var(--chat-muted); font-family: var(--chat-mono); font-size: 10px; }
.chat-topmeta a:hover { color: var(--chat-blue); }
.preview-tag { padding: 3px 6px; border: 1px solid var(--chat-border-strong); border-radius: 4px; color: var(--chat-muted); font-size: 9px; letter-spacing: .07em; }
.chat-stage { min-height: 0; flex: 1; display: flex; flex-direction: column; }
.chat-thread { min-height: 0; flex: 1; overflow-y: auto; padding: 44px 22px 22px; }
.chat-thread-inner { width: min(780px, 100%); margin: 0 auto; }
.empty-chat { min-height: 360px; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.empty-mark { width: 36px; height: 36px; display: grid; place-items: center; margin-bottom: 20px; border: 1px solid var(--chat-border-strong); border-radius: 10px; color: var(--chat-blue); font-size: 17px; }
.empty-chat h1 { margin: 0; color: var(--chat-text); font-size: clamp(26px, 4vw, 34px); font-weight: 600; letter-spacing: -.04em; }
.empty-chat p { max-width: 520px; margin: 9px 0 0; color: var(--chat-muted); font-size: 14px; }
.prompt-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; width: min(780px, 100%); margin-top: 28px; }
.prompt { min-height: 65px; padding: 11px 12px; border: 1px solid var(--chat-border); border-radius: 6px; color: var(--chat-muted); background: transparent; font-size: 12px; line-height: 1.5; text-align: left; }
.prompt:hover { border-color: var(--chat-blue-dim); color: var(--chat-text); background: var(--chat-panel); }
.message { max-width: 760px; margin: 0 auto 27px; }
.message.user { padding: 11px 13px; border-radius: 6px; background: var(--chat-panel); }
.message-meta { margin-bottom: 7px; color: var(--chat-muted); font-family: var(--chat-mono); font-size: 9px; letter-spacing: .06em; text-transform: uppercase; }
.message.user .message-meta { color: var(--chat-blue); }
.message p { margin: 0; color: var(--chat-text); font-size: 15px; line-height: 1.75; white-space: pre-wrap; }
.message.assistant p { color: var(--chat-text); }
.composer-zone { padding: 12px 22px 17px; }
.composer { width: min(780px, 100%); margin: 0 auto; }
.composer-box { display: flex; align-items: flex-end; gap: 9px; padding: 8px 8px 8px 13px; border: 1px solid var(--chat-border); border-radius: 7px; background: var(--chat-input); }
.composer-box:focus-within { border-color: var(--chat-blue-dim); }
.composer textarea { min-height: 38px; max-height: 120px; flex: 1; resize: none; border: 0; outline: 0; color: var(--chat-text); background: transparent; font-size: 14px; line-height: 1.55; }
.composer textarea::placeholder { color: var(--chat-muted); }
.send { width: 32px; height: 32px; display: grid; place-items: center; flex: 0 0 32px; border: 0; border-radius: 5px; color: #14161a; background: var(--chat-blue); }
.send:hover { background: #a1baff; }
.send svg { width: 14px; height: 14px; }
.composer-note { display: flex; justify-content: space-between; margin-top: 7px; padding: 0 2px; color: var(--chat-muted); font-family: var(--chat-mono); font-size: 10px; }
.home-footer { padding: 0 22px 11px; color: var(--chat-muted); font-family: var(--chat-mono); font-size: 9px; text-align: center; }

@media (max-width: 760px) {
  .chat-sidebar { width: 218px; min-width: 218px; }
  .prompt-list { grid-template-columns: 1fr; }
  .prompt { min-height: auto; }
}
@media (max-width: 560px) {
  .chat-sidebar { display: none; }
  .chat-topbar { padding: 0 14px; }
  .chat-topmeta { gap: 6px; }
  .chat-thread { padding: 28px 14px 16px; }
  .composer-zone { padding-left: 14px; padding-right: 14px; }
  .home-footer { padding-left: 14px; padding-right: 14px; }
}