/* ============================================================
   shell.css · 应用外壳：左侧深色工作区导轨 + 二级导航 + 顶部上下文栏
   （刻意区别于参考产品的「顶部横向导航 + 三栏」结构）
   ============================================================ */
.app { display: grid; grid-template-columns: var(--rail-w) var(--subnav-w) minmax(0, 1fr); grid-template-rows: 100vh; height: 100vh; overflow: hidden; }
.app.no-subnav { grid-template-columns: var(--rail-w) minmax(0, 1fr); }
.app.no-subnav .subnav { display: none; }
.app.is-immersive { grid-template-columns: var(--rail-w) minmax(0, 1fr); }
.app.is-immersive .subnav { display: none; }

/* —— 一级导轨（永远深色） —— */
.rail { background: var(--deck); color: var(--on-deck-2); display: flex; flex-direction: column; align-items: center; padding: 12px 0 10px; gap: 4px; border-right: 1px solid var(--deck-line); z-index: var(--z-rail); }
.rail-logo { width: 40px; height: 44px; display: grid; place-items: center; margin-bottom: 10px; border-radius: var(--r-s); }
.rail-logo img { width: 32px; height: auto; }
.rail-item { position: relative; width: 60px; padding: 8px 0 6px; border-radius: var(--r-m); display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--on-deck-3); font-size: 11px; font-weight: 550; text-decoration: none !important; transition: color .15s, background .15s; }
.rail-item:hover { color: var(--on-deck); background: rgba(255, 255, 255, .06); }
.rail-item.is-active { color: #fff; background: rgba(255, 255, 255, .09); }
.rail-item.is-active::before { content: ""; position: absolute; left: -8px; top: 12px; bottom: 12px; width: 3px; border-radius: 0 3px 3px 0; background: var(--amber); }
.rail-sep { width: 28px; height: 1px; background: var(--deck-line); margin: 6px 0; }
.rail-spacer { flex: 1; }

/* —— 二级导航 —— */
.subnav { background: var(--surface); border-right: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; }
.subnav-h { padding: 16px 16px 10px; }
.subnav-h .ws-name { font-size: 15px; font-weight: 650; display: flex; align-items: center; gap: 8px; }
.subnav-h .ws-desc { font-size: 12px; color: var(--ink-3); margin-top: 2px; }
.subnav-body { flex: 1; overflow-y: auto; padding: 4px 10px 16px; }
.subnav-group { margin-top: 14px; }
.subnav-group > .label-mono { padding: 0 8px 6px; display: block; }
.subnav-link { display: flex; align-items: center; gap: 9px; height: 34px; padding: 0 9px; border-radius: var(--r-s); color: var(--ink-2); font-size: 13.5px; font-weight: 500; text-decoration: none !important; }
.subnav-link:hover { background: var(--surface-3); color: var(--ink); }
.subnav-link.is-active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.subnav-link .tail { margin-left: auto; font-family: var(--font-mono); font-size: 10.5px; color: var(--ink-3); }
.subnav-link .tail.new { color: var(--amber-deep); }
.subnav-f { padding: 12px; border-top: 1px solid var(--line); }

/* —— 主区 —— */
.main { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--bg); }
.topbar { height: var(--topbar-h); flex: 0 0 auto; display: flex; align-items: center; gap: 12px; padding: 0 20px; background: var(--surface); border-bottom: 1px solid var(--line); z-index: var(--z-topbar); }
.crumbs { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-3); min-width: 0; }
.crumbs a { color: var(--ink-3); } .crumbs a:hover { color: var(--ink); text-decoration: none; }
.crumbs .cur { color: var(--ink); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-tools { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.cmdk { display: flex; align-items: center; gap: 8px; height: 34px; min-width: 220px; padding: 0 10px; border-radius: var(--r-s); border: 1px solid var(--line); background: var(--surface-2); color: var(--ink-3); font-size: 13px; }
.cmdk:hover { border-color: var(--line-strong); color: var(--ink-2); }
.cmdk .kbd { margin-left: auto; }
.role-pill { display: inline-flex; align-items: center; gap: 8px; height: 34px; padding: 0 10px 0 4px; border-radius: var(--r-pill); border: 1px solid var(--line); background: var(--surface); font-size: 13px; font-weight: 550; }
.role-pill:hover { border-color: var(--line-strong); }
.role-pill .role-tag { font-size: 11px; color: var(--ink-3); font-weight: 500; }
.ai-btn { display: inline-flex; align-items: center; gap: 7px; height: 34px; padding: 0 12px; border-radius: var(--r-pill); color: #fff; font-size: 13px; font-weight: 600; background: var(--brand-grad); box-shadow: 0 4px 14px -6px rgba(0, 144, 213, .7); }
.ai-btn:hover { filter: brightness(1.08); }
.icon-btn { position: relative; width: 34px; height: 34px; border-radius: var(--r-s); display: grid; place-items: center; color: var(--ink-2); }
.icon-btn:hover { background: var(--surface-3); color: var(--ink); }
.icon-btn .pip { position: absolute; top: 7px; right: 7px; width: 7px; height: 7px; border-radius: 50%; background: var(--amber); border: 1.5px solid var(--surface); }

.view { flex: 1; min-height: 0; overflow-y: auto; }
/* 进场动画只做透明度：带 transform 的动画会让 .page 成为 position:fixed 子元素的包含块 */
@keyframes page-in { from { opacity: 0; } to { opacity: 1; } }
.page { padding: 24px 28px 48px; max-width: 1480px; margin: 0 auto; animation: page-in .22s ease both; }
.page.narrow { max-width: 1080px; } .page.wide { max-width: none; }
.page.flush { padding: 0; max-width: none; height: 100%; }
.page-h { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }
.page-h h1 { font-size: 22px; display: flex; align-items: center; gap: 10px; }
.page-h .desc { color: var(--ink-3); font-size: 13.5px; margin-top: 4px; max-width: 760px; }
.page-h .actions { display: flex; gap: 8px; flex-wrap: wrap; }
.sec-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 28px 0 12px; }
.sec-h h2 { font-size: 16px; display: flex; align-items: center; gap: 8px; }
.sec-h .more { font-size: 13px; color: var(--ink-3); display: inline-flex; align-items: center; gap: 2px; }
.toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.toolbar .search { width: 260px; }

/* —— 全局 AI 助手（右侧抽屉内） / 命令面板 —— */
.cmd-panel { width: min(640px, 100%); background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-l); box-shadow: var(--shadow-3); overflow: hidden; align-self: start; margin-top: 12vh; }
.cmd-input { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.cmd-input input { flex: 1; border: 0; outline: 0; background: transparent; font-size: 15px; }
.cmd-list { max-height: 50vh; overflow-y: auto; padding: 6px; }
.cmd-item { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: var(--r-s); font-size: 13.5px; color: var(--ink); text-decoration: none !important; }
.cmd-item:hover, .cmd-item.is-active { background: var(--surface-3); }
.cmd-item .path { margin-left: auto; font-size: 11.5px; color: var(--ink-3); }

/* —— 原型标注条 —— */
.proto-flag { position: fixed; left: calc(var(--rail-w) + 12px); bottom: 12px; z-index: 30; display: none; }

/* —— 响应式：窄屏收起二级导航 —— */
@media (max-width: 1100px) {
  .app { grid-template-columns: var(--rail-w) minmax(0, 1fr); }
  .subnav { position: fixed; left: var(--rail-w); top: 0; bottom: 0; width: var(--subnav-w); z-index: 45; transform: translateX(-110%); transition: transform .2s; box-shadow: var(--shadow-3); }
  .app.subnav-open .subnav { transform: none; }
  .cmdk { min-width: 0; } .cmdk span.lbl { display: none; }
}
@media (max-width: 680px) {
  :root { --rail-w: 58px; }
  .rail-item { width: 48px; font-size: 10px; }
  .page { padding: 16px 14px 40px; }
  .role-pill .role-tag, .ai-btn span, .role-pill > span:not(.avatar), .cmdk .kbd { display: none; }
  .role-pill { padding: 0 6px 0 4px; } .ai-btn { padding: 0 10px; } .cmdk { padding: 0 9px; } .topbar { padding: 0 12px; gap: 8px; }
  .crumbs > *:not(.cur) { display: none; }
}