/* 后台布局与交互样式；颜色、字体、按钮、表格等基础组件来自 industry.css（设计系统） */
body { margin: 0; min-height: 100vh; }
.muted { color: color-mix(in srgb, var(--color-text) 55%, transparent); }
.small { font-size: 12px; }
.mono { font-family: ui-monospace, Menlo, monospace; }
.row { display: flex; align-items: center; gap: 12px; }
.row.end { align-items: flex-end; }
.grow { flex: 1; min-width: 0; }
.col { display: flex; flex-direction: column; gap: 16px; }
.col.tight { gap: 8px; }
.wrap { flex-wrap: wrap; }
.fade { animation: fadeUp .3s both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes pop { from { opacity: 0; transform: scale(.94); } to { opacity: 1; transform: none; } }
.btn { min-height: 36px; }
.btn.sm { min-height: 30px; font-size: 12px; padding-block: 3px; }
.btn.lg { min-height: 46px; font-size: 16px; }
.btn[disabled] { pointer-events: none; }
.input.sel { width: auto; min-width: 130px; }
.panel { padding: 18px; display: flex; flex-direction: column; gap: 12px; }
.frame { border: 1px solid var(--color-divider); overflow: auto; }
.frame .table td, .frame .table th { padding: 10px 12px; vertical-align: middle; }
.empty { text-align: center; padding: 28px; }
.err { font-size: 13px; color: var(--color-accent-800); background: var(--color-accent-100); padding: 8px 10px; }
.num { font-family: var(--font-heading); font-weight: 600; line-height: 1.1; }
.bar { height: 4px; background: var(--color-neutral-200); }
.bar > i { display: block; height: 4px; background: var(--color-accent); }
.kicker { color: var(--color-accent-700); }
.right { text-align: right; white-space: nowrap; }

/* 登录 */
.login { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.login .hero { background: var(--color-accent-900); color: var(--color-accent-100); position: relative; overflow: hidden; display: flex; flex-direction: column; justify-content: flex-end; padding: 56px; }
.login .hero::before { content: ""; position: absolute; inset: 0; opacity: .6; background-image: linear-gradient(var(--color-accent-800) 1px, transparent 1px), linear-gradient(90deg, var(--color-accent-800) 1px, transparent 1px); background-size: 32px 32px; }
.login .hero > * { position: relative; }
.login .hero .tag-line { font-size: 12px; letter-spacing: .16em; color: var(--color-accent-300); }
.login .hero .big { font-family: var(--font-heading); font-weight: 600; font-size: 56px; line-height: 1; }
.login .form { display: flex; align-items: center; justify-content: center; padding: 40px; }
.login .form form { width: min(380px, 100%); display: flex; flex-direction: column; gap: 18px; }
.login .input { min-height: 44px; font-size: 16px; }
@media (max-width: 800px) { .login { grid-template-columns: 1fr; } .login .hero { display: none; } }

/* 外壳 */
.shell { min-height: 100vh; display: grid; grid-template-columns: 232px minmax(0, 1fr); }
.side { border-right: 1px solid var(--color-divider); display: flex; flex-direction: column; padding: 20px 14px; gap: 20px; position: sticky; top: 0; height: 100vh; }
.side .logo { display: flex; align-items: center; gap: 10px; padding: 0 6px; }
.side .logo .mark { width: 34px; height: 34px; display: grid; place-items: center; color: var(--color-accent); }
.side .logo b { font-family: var(--font-heading); font-weight: 600; font-size: 18px; line-height: 1.1; display: block; }
.nav-list { display: flex; flex-direction: column; gap: 2px; flex: 1; overflow: auto; }
.nav-item { all: unset; box-sizing: border-box; cursor: pointer; display: flex; align-items: center; gap: 10px; min-height: 42px; padding: 0 10px; font-size: 14px; }
.nav-item:hover { background: var(--color-accent-100); }
.nav-item:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -2px; }
.nav-item[aria-current="page"] { background: var(--color-accent-100); color: var(--color-accent-800); font-weight: 600; }
.nav-item .no { font-family: ui-monospace, Menlo, monospace; font-size: 11px; color: var(--color-accent-700); width: 18px; }
.side .me { display: flex; flex-direction: column; gap: 8px; padding: 12px 6px 0; border-top: 1px solid var(--color-divider); }
.side .me .who { font-size: 13px; font-weight: 500; overflow: hidden; text-overflow: ellipsis; }
.main { padding: 28px 36px 48px; display: flex; flex-direction: column; gap: 24px; min-width: 0; }
.main > header { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; }
.main > header h1 { margin: 2px 0 0; font-size: 38px; }
.main > header h6 { margin: 0; color: var(--color-accent-700); }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--color-divider); }
  .nav-list { flex-direction: row; flex-wrap: wrap; }
  .main { padding: 20px 16px 40px; }
}

/* 概览 */
.grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.split { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); gap: 16px; align-items: start; }
.split.rev { grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); }
@media (max-width: 1100px) { .grid4, .grid3, .split, .split.rev { grid-template-columns: 1fr 1fr; } }
@media (max-width: 700px) { .grid4, .grid3, .split, .split.rev { grid-template-columns: 1fr; } }
.stat { padding: 18px; display: flex; flex-direction: column; gap: 2px; }
.stat .num { font-size: 40px; }
.stat .sub { font-size: 12px; color: var(--color-accent-700); }
.dau { display: grid; grid-template-columns: repeat(14, 1fr); gap: 6px; align-items: end; height: 160px; border-bottom: 1px solid var(--color-divider); }
.dau i { display: block; border: 1px solid var(--color-accent); background: var(--color-accent-200); min-height: 2px; }
.dau i.today { background: var(--color-accent); }
.dau-x { display: grid; grid-template-columns: repeat(14, 1fr); gap: 6px; font-size: 10px; text-align: center; }
.todo { all: unset; box-sizing: border-box; cursor: pointer; border: 1px solid var(--color-divider); padding: 16px; display: flex; align-items: center; gap: 14px; position: relative; }
.todo:hover { background: var(--color-accent-100); }
.todo:focus-visible { outline: 2px solid var(--color-accent); }
.todo .num { font-size: 34px; color: var(--color-accent-700); }
.todo b { font-size: 15px; font-weight: 500; display: block; }

/* 列表项（题库 / 反馈 / 推送记录） */
.list { border: 1px solid var(--color-divider); }
.list > * { border-bottom: 1px solid var(--color-divider); }
.list > *:last-child { border-bottom: 0; }
.item { padding: 14px; display: flex; gap: 12px; align-items: flex-start; }
.item.pick { all: unset; box-sizing: border-box; width: 100%; cursor: pointer; padding: 14px; display: flex; flex-direction: column; gap: 4px; }
.item.pick:hover { background: var(--color-accent-100); }
.item.pick[aria-pressed="true"] { background: var(--color-accent-100); }
.item.pick:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -2px; }
.clip { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.reply { padding: 12px 14px; background: var(--color-accent-100); color: var(--color-accent-800); display: flex; flex-direction: column; gap: 4px; font-size: 14px; line-height: 1.6; }
.preview { padding: 12px 14px; display: flex; flex-direction: column; gap: 6px; }
.preview .subject { font-family: var(--font-heading); font-weight: 600; font-size: 20px; line-height: 1.3; }
.preview pre { margin: 0; font: inherit; font-size: 14px; line-height: 1.8; white-space: pre-wrap; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.chip { cursor: pointer; background: transparent; font-family: ui-monospace, Menlo, monospace; }
.hint { font-size: 12px; line-height: 1.6; }
.sel-row { background: var(--color-accent-100); }

/* 弹窗 / toast */
.dialog-backdrop { z-index: 50; animation: fadeUp .2s both; }
.dialog { background: var(--color-bg); animation: pop .25s both; }
#toast { position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%); padding: 12px 20px; background: var(--color-neutral-900); color: var(--color-bg); font-size: 14px; box-shadow: var(--shadow-md); z-index: 60; display: none; max-width: 90vw; }
#toast.show { display: block; animation: fadeUp .25s both; }
#toast.bad { background: var(--color-accent-800); }
.link-box { word-break: break-all; padding: 10px 12px; background: var(--color-accent-100); color: var(--color-accent-800); font-family: ui-monospace, Menlo, monospace; font-size: 12px; user-select: all; }
.upload { position: relative; overflow: hidden; }
.upload input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.progress { height: 4px; background: var(--color-neutral-200); }
.progress > i { display: block; height: 4px; width: 0; background: var(--color-accent); transition: width .15s; }