:root {
  --ink: #171a19;
  --paper: #f0f0eb;
  --paper-2: #e7e8e2;
  --panel: #ffffff;
  --muted: #6a716d;
  --line: #c8cbc5;
  --blue: #1856d2;
  --yellow: #ddf45b;
  --red: #e3553d;
  --green: #1f9d6b;
  --mono: 'DM Mono', Consolas, monospace;
  --sans: 'IBM Plex Sans', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
}
* { box-sizing: border-box; }
/* hidden 属性必须压过 .login-wrap/.app 的 display:grid，否则登录后登录框不消失 */
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body { font: 14px/1.6 var(--sans); color: var(--ink); background: var(--paper-2); -webkit-font-smoothing: antialiased; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: var(--blue); text-decoration: none; }
h1, h2, h3, p { margin: 0; }
.mono { font-family: var(--mono); }

/* ---------- Login ---------- */
.login-wrap { min-height: 100%; display: grid; place-items: center; padding: 24px; background: var(--paper-2); }
.login-card { width: min(360px, 100%); padding: 30px 28px; background: var(--panel); border: 1px solid var(--ink); box-shadow: 8px 8px 0 var(--paper-2), 8px 8px 0 1px var(--ink); }
.login-brand { font: 700 24px/1 var(--sans); }
.login-brand span { color: var(--blue); margin-left: 8px; font-size: 16px; }
.login-sub { margin: 6px 0 22px; color: var(--muted); font: 9px var(--mono); letter-spacing: 1px; }
.login-card label { display: block; margin-bottom: 14px; font-size: 12px; }
.login-card input { width: 100%; height: 42px; margin-top: 6px; padding: 0 12px; border: 1px solid var(--ink); border-radius: 0; background: var(--paper); }
.login-card input:focus { outline: 2px solid var(--blue); outline-offset: 1px; }
.login-status { margin: 10px 0 0; font-size: 12px; }

/* ---------- 验证码 ---------- */
.captcha-row { display: grid; grid-template-columns: minmax(0, 1fr) 132px; gap: 8px; margin-top: 6px; align-items: stretch; }
.captcha-row input { margin-top: 0 !important; padding: 0 10px; font: 700 20px/1 var(--mono); letter-spacing: 6px; text-align: center; }
.captcha-btn { display: grid; place-items: center; padding: 0; border: 1px solid var(--ink); background: var(--paper); cursor: pointer; overflow: hidden; position: relative; }
.captcha-btn:hover { border-color: var(--blue); }
.captcha-btn img { display: block; width: 132px; height: 42px; image-rendering: pixelated; }
.captcha-hint { font-size: 10px; color: var(--muted); padding: 0 6px; line-height: 1.4; }
.login-status[data-kind="error"] { color: var(--red); }
.btn { cursor: pointer; border: 1px solid var(--ink); background: var(--paper); padding: 9px 16px; font-size: 12px; font-weight: 600; transition: background .15s, color .15s, transform .1s; }
.btn:hover { background: var(--paper-2); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--blue); color: #fff; border-color: var(--blue); width: 100%; min-height: 44px; }
.btn-primary:hover { background: var(--ink); }
.btn-sm { padding: 6px 11px; font-size: 11px; }
.btn-orange { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn-orange:hover { background: var(--ink); }
.btn-ghost { background: transparent; }
.btn-danger { color: var(--red); border-color: var(--red); }
.btn-danger:hover { background: var(--red); color: #fff; }
.btn[disabled] { pointer-events: none; }

/* ---------- App shell ---------- */
.app { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar { background: var(--ink); color: var(--paper); display: flex; flex-direction: column; padding: 20px 0; position: sticky; top: 0; height: 100vh; }
.side-brand { padding: 0 20px 18px; font: 700 20px/1 var(--sans); border-bottom: 1px solid #3a403d; }
.side-brand small { display: block; margin-top: 5px; color: #9aa19c; font: 9px var(--mono); letter-spacing: 1px; }
.side-nav { display: flex; flex-direction: column; padding: 14px 0; flex: 1; }
.nav-item { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 11px 20px; border: 0; background: transparent; color: #cfd4d0; text-align: left; font-size: 13px; cursor: pointer; border-left: 3px solid transparent; }
.nav-item:hover { background: #232826; color: #fff; }
.nav-item.active { background: #232826; color: #fff; border-left-color: var(--yellow); }
.badge { min-width: 18px; height: 18px; padding: 0 5px; display: inline-grid; place-items: center; background: var(--red); color: #fff; border-radius: 9px; font: 10px var(--mono); }
.side-logout { margin: 8px 20px 0; padding: 9px; border: 1px solid #3a403d; background: transparent; color: #cfd4d0; cursor: pointer; font-size: 12px; }
.side-logout:hover { background: #232826; color: #fff; }

.main { display: flex; flex-direction: column; min-width: 0; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 16px 28px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.top-title { font-size: 18px; }
.top-user { font: 12px var(--mono); color: var(--muted); }
.view { padding: 26px 28px 60px; }

/* ---------- Cards / stats ---------- */
.card { background: var(--panel); border: 1px solid var(--line); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 26px; }
.stat { padding: 16px 18px; border: 1px solid var(--ink); background: var(--panel); }
.stat b { display: block; font: 700 30px/1 var(--sans); }
.stat span { color: var(--muted); font-size: 12px; }
.stat small { display: block; margin-top: 6px; color: var(--blue); font: 10px var(--mono); }
.panel { background: var(--panel); border: 1px solid var(--line); padding: 18px; margin-bottom: 20px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.panel-head h2 { font-size: 15px; }
.panel-head .actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ---------- Toolbar / filters ---------- */
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
.toolbar input, .toolbar select { height: 38px; padding: 0 11px; border: 1px solid var(--ink); background: var(--paper); }
.toolbar input[type="search"] { min-width: 200px; }
.toolbar .spacer { flex: 1; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); background: var(--panel); }
table.grid { width: 100%; border-collapse: collapse; font-size: 12px; }
table.grid th, table.grid td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
table.grid th { background: var(--paper-2); font-size: 11px; color: var(--muted); position: sticky; top: 0; }
table.grid tr:hover td { background: #fafaf6; }
table.grid .col-actions { white-space: nowrap; }
.row-btn { border: 1px solid var(--line); background: var(--paper); padding: 4px 9px; margin-right: 4px; cursor: pointer; font-size: 11px; }
.row-btn:hover { background: var(--paper-2); }
.row-btn.danger { color: var(--red); border-color: var(--red); }
.empty { padding: 30px; text-align: center; color: var(--muted); }

/* ---------- Status pills ---------- */
.pill { display: inline-block; padding: 2px 9px; border-radius: 10px; font: 10px var(--mono); border: 1px solid; }
.pill.draft { color: var(--muted); border-color: var(--line); }
.pill.published { color: var(--green); border-color: var(--green); }
.pill.offline { color: var(--red); border-color: var(--red); }
.pill.pending { color: var(--blue); border-color: var(--blue); }
.pill.replied { color: var(--green); border-color: var(--green); }
.pill.archived { color: var(--muted); border-color: var(--line); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 18px; }
.form-grid label { display: block; font-size: 12px; }
.form-grid .full { grid-column: 1 / -1; }
.form-grid input, .form-grid select, .form-grid textarea { width: 100%; margin-top: 5px; padding: 8px 10px; border: 1px solid var(--ink); background: var(--paper); border-radius: 0; }
.form-grid textarea { min-height: 90px; resize: vertical; line-height: 1.7; font-family: var(--sans); }
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus { outline: 2px solid var(--blue); outline-offset: 1px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 12px; }

/* ---------- Modal ---------- */
.modal-backdrop { position: fixed; inset: 0; background: rgba(20,24,22,.55); display: grid; place-items: center; padding: 20px; z-index: 50; }
.modal { width: min(860px, 100%); max-height: 90vh; overflow: auto; background: var(--panel); border: 1px solid var(--ink); box-shadow: 10px 10px 0 rgba(0,0,0,.18); }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--panel); }
.modal-head h3 { font-size: 16px; }
.modal-close { border: 0; background: transparent; font-size: 22px; line-height: 1; cursor: pointer; color: var(--muted); }
.modal-body { padding: 20px; }
.modal-foot { display: flex; gap: 10px; justify-content: flex-end; padding: 16px 20px; border-top: 1px solid var(--line); position: sticky; bottom: 0; background: var(--panel); }

/* ---------- AI panel ---------- */
.ai-panel { border: 1px dashed var(--blue); background: #f3f6ff; padding: 14px; margin-top: 6px; }
.ai-panel .ai-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.ai-panel .ai-head-sub { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--blue); }
.ai-panel h4 { font-size: 12px; color: var(--blue); flex: none; }
.ai-panel .ai-hint { font-size: 11px; color: var(--muted); text-align: right; line-height: 1.5; }
.ai-panel textarea { width: 100%; min-height: 120px; padding: 9px; border: 1px solid var(--blue); background: #fff; font-family: var(--sans); line-height: 1.7; }
.ai-panel textarea[readonly] { background: #fafbff; color: #33393f; font-family: var(--mono); font-size: 12px; }
.ai-panel .ai-actions { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }

/* ---------- Preview（独立浮层，盖在编辑弹窗之上） ---------- */
.preview-backdrop { z-index: 70; }
.preview-modal { width: min(1080px, 100%); display: flex; flex-direction: column; max-height: 92vh; }
.preview-modal .modal-body { padding: 0; flex: 1; min-height: 0; }
.preview-note { font-size: 11px; color: var(--green); margin-left: auto; margin-right: 14px; }
.preview-tip { font-size: 11px; color: var(--muted); }
.preview-frame { width: 100%; height: 64vh; border: 0; background: #fff; display: block; }

/* ---------- Toast ---------- */
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); padding: 11px 18px; background: var(--ink); color: var(--paper); font-size: 13px; z-index: 80; box-shadow: 4px 4px 0 rgba(0,0,0,.2); }
.toast.error { background: var(--red); color: #fff; }
.toast.success { background: var(--green); color: #fff; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; padding: 10px; }
  .side-brand { border: 0; padding: 0 12px 0 4px; }
  .side-nav { flex-direction: row; flex-wrap: wrap; padding: 0; flex: 1; }
  .nav-item { border-left: 0; border-bottom: 3px solid transparent; padding: 8px 12px; }
  .nav-item.active { border-left: 0; border-bottom-color: var(--yellow); }
  .side-logout { margin: 0; padding: 8px 12px; }
  .form-grid { grid-template-columns: 1fr; }
}