:root {
    --bg: #eaf0f0; --surface: #ffffff; --surface-2: #f4f8f8; --surface-3: #eef3f3;
    --ink: #102524; --ink-2: #3a4f4d; --muted: #67807e; --border: #d9e3e2;
    --accent: #0d7d8a; --accent-ink: #ffffff; --accent-soft: #dceff0; --accent-line: #0d7d8a;
    --good: #137a4d; --good-soft:#dcefe4; --ok: #b7791f; --ok-soft:#f6ecd6;
    --bad: #c1372e; --bad-soft:#f6ddd9; --neutral: #7c8c8e; --neutral-soft:#e6ecec;
    --up: #137a4d; --down: #c1372e;
    --shadow: 0 1px 2px rgba(16,37,36,.04), 0 6px 20px rgba(16,37,36,.06);
    --radius: 14px; --radius-sm: 9px; --nav-w: 264px;
    --fs-mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
    --fs-sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #0a1314; --surface: #0f1e1f; --surface-2: #142a2b; --surface-3: #16302f;
      --ink: #e8f0ef; --ink-2: #bcccca; --muted: #7f9694; --border: #21393a;
      --accent: #34b4c1; --accent-ink: #04191b; --accent-soft: #113233; --accent-line: #34b4c1;
      --good: #3bb377; --good-soft:#123227; --ok: #d9a441; --ok-soft:#33290f;
      --bad: #e37368; --bad-soft:#3a1d1a; --neutral: #7f9391; --neutral-soft:#1e302f;
      --up: #3bb377; --down: #e37368;
      --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    }
  }
  :root[data-theme="dark"] {
    --bg: #0a1314; --surface: #0f1e1f; --surface-2: #142a2b; --surface-3: #16302f;
    --ink: #e8f0ef; --ink-2: #bcccca; --muted: #7f9694; --border: #21393a;
    --accent: #34b4c1; --accent-ink: #04191b; --accent-soft: #113233; --accent-line: #34b4c1;
    --good: #3bb377; --good-soft:#123227; --ok: #d9a441; --ok-soft:#33290f;
    --bad: #e37368; --bad-soft:#3a1d1a; --neutral: #7f9391; --neutral-soft:#1e302f;
    --up: #3bb377; --down: #e37368;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }
  :root[data-theme="light"] {
    --bg: #eaf0f0; --surface: #ffffff; --surface-2: #f4f8f8; --surface-3: #eef3f3;
    --ink: #102524; --ink-2: #3a4f4d; --muted: #67807e; --border: #d9e3e2;
    --accent: #0d7d8a; --accent-ink: #ffffff; --accent-soft: #dceff0; --accent-line: #0d7d8a;
    --good: #137a4d; --good-soft:#dcefe4; --ok: #b7791f; --ok-soft:#f6ecd6;
    --bad: #c1372e; --bad-soft:#f6ddd9; --neutral: #7c8c8e; --neutral-soft:#e6ecec;
    --up: #137a4d; --down: #c1372e;
    --shadow: 0 1px 2px rgba(16,37,36,.04), 0 6px 20px rgba(16,37,36,.06);
  }

  * { box-sizing: border-box; }
  body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--fs-sans);
    font-size: 14px; line-height: 1.5; -webkit-font-smoothing: antialiased; }
  a { color: var(--accent); text-decoration: none; }
  a:hover { text-decoration: underline; }
  h1,h2,h3 { margin: 0; text-wrap: balance; }
  .num { font-variant-numeric: tabular-nums; }
  :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

  /* ---------- Shell ---------- */
  .app { min-height: 100vh; }
  .sidebar { position: fixed; top: 0; left: 0; z-index: 40; width: var(--nav-w); height: 100vh;
    background: var(--surface); border-right: 1px solid var(--border); padding: 18px 14px;
    display: flex; flex-direction: column; gap: 6px; overflow-y: auto;
    transform: translateX(0); transition: transform .22s ease; }
  body.nav-closed .sidebar { transform: translateX(-100%); }   /* thu gọn menu (desktop) */
  .scrim { position: fixed; inset: 0; z-index: 38; background: rgba(4,20,20,.5);
    opacity: 0; visibility: hidden; transition: opacity .2s ease; }
  .brand { display: flex; align-items: center; gap: 10px; padding: 4px 6px 14px; }
  .brand .logo { width: 34px; height: 34px; border-radius: 9px; display: block; flex: none;
    object-fit: contain; box-shadow: var(--shadow); }
  .brand-txt { min-width: 0; }
  .brand b { font-size: 15px; letter-spacing: -.2px; }
  .brand small { display: block; color: var(--muted); font-size: 11px; font-weight: 600; letter-spacing: .3px;
    text-transform: uppercase; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .nav-collapse { margin-left: auto; flex: none; border: 0; background: transparent; color: var(--muted);
    cursor: pointer; width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center;
    font-size: 20px; line-height: 1; font-family: inherit; }
  .nav-collapse:hover { background: var(--surface-2); color: var(--accent); }
  .nav-open-btn { position: fixed; top: 12px; left: 12px; z-index: 45; display: none;
    width: 40px; height: 40px; border-radius: 11px; border: 1px solid var(--border);
    background: var(--surface); color: var(--ink-2); box-shadow: var(--shadow);
    cursor: pointer; align-items: center; justify-content: center; font-size: 17px; }
  .nav-open-btn:hover { border-color: var(--accent); color: var(--accent); }
  body.nav-closed .nav-open-btn { display: flex; }
  body.nav-closed .topbar { padding-left: 64px; }
  .nav-label { font-size: 10.5px; font-weight: 700; letter-spacing: .8px; text-transform: uppercase; color: var(--muted); padding: 12px 8px 4px; }
  .site-btn { display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 10px;
    color: var(--ink-2); cursor: pointer; border: 1px solid transparent; font-weight: 500; }
  .site-btn:hover { background: var(--surface-2); }
  .site-btn.active { background: var(--accent-soft); color: var(--ink); border-color: var(--border); font-weight: 600; }
  .site-btn .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
  .site-btn .meta { margin-left: auto; font-size: 11px; color: var(--muted); }
  .sidebar-foot { margin-top: auto; padding: 12px 8px 4px; border-top: 1px solid var(--border);
    display: flex; flex-direction: column; gap: 10px; }
  .foot-note { color: var(--muted); font-size: 11.5px; }
  .foot-user { display: flex; align-items: center; gap: 10px; }
  .foot-user .fu-info { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
  .foot-user .fu-name { font-weight: 600; font-size: 13px; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .foot-user .fu-role { font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
  .foot-user .fu-logout { margin-left: auto; padding: 6px 10px; font-size: 15px; }

  /* ---------- Topbar ---------- */
  main { min-width: 0; margin-left: var(--nav-w); transition: margin-left .22s ease; }
  body.nav-closed main { margin-left: 0; }
  .topbar { position: sticky; top: 0; z-index: 20; background: color-mix(in oklab, var(--bg) 82%, transparent);
    backdrop-filter: blur(8px); border-bottom: 1px solid var(--border);
    display: flex; align-items: center; gap: 14px; padding: 12px 22px; flex-wrap: wrap; }
  .crumbs { font-weight: 700; font-size: 16px; letter-spacing: -.2px; }
  .crumbs span { color: var(--muted); font-weight: 500; font-size: 13px; }
  .spacer { flex: 1; }
  .control { display: inline-flex; align-items: center; gap: 7px; background: var(--surface); border: 1px solid var(--border);
    border-radius: 10px; padding: 7px 11px; font-weight: 600; font-size: 13px; color: var(--ink-2); cursor: pointer; }
  .control:hover { border-color: var(--accent); }
  .control.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
  .seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; padding: 3px; gap: 2px; }
  .seg button { border: 0; background: transparent; color: var(--muted); font-weight: 600; font-size: 12.5px; font-family: inherit;
    padding: 5px 12px; border-radius: 7px; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; }
  .seg button.on { background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
  .updated { font-size: 12px; color: var(--muted); text-align: right; line-height: 1.35; }
  .updated b { color: var(--ink-2); }

  /* ---------- Content ---------- */
  .content { padding: 22px; max-width: 1240px; margin: 0 auto;
    display: flex; flex-direction: column; gap: 18px; }
  .content > * { min-width: 0; }        /* cho phép co lại, không đẩy tràn ngang */
  .grid-2 > * { min-width: 0; }          /* cột trong grid không phình theo bảng dài */
  .view { display: none; flex-direction: column; gap: 18px; }
  .view.active { display: flex; }
  .card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
  .card-h { display: flex; align-items: center; gap: 10px; padding: 15px 18px 0; }
  .card-h h3 { font-size: 14.5px; letter-spacing: -.1px; }
  .card-h .sub { color: var(--muted); font-size: 12px; font-weight: 500; }
  .card-b { padding: 15px 18px 18px; }
  .badge { font-size: 10.5px; font-weight: 700; letter-spacing: .3px; text-transform: uppercase; padding: 3px 8px; border-radius: 999px; color: var(--muted); background: var(--neutral-soft, rgba(127,127,127,.14)); }
  .badge.admin { color: var(--accent); background: var(--accent-soft); border: 1px solid color-mix(in oklab, var(--accent) 30%, transparent); }
  .badge.ai { background: linear-gradient(135deg, var(--accent), #0b636e); color:#fff; }

  /* AI narrative */
  .ai-card { background: linear-gradient(180deg, var(--accent-soft), var(--surface) 62%); border-color: color-mix(in oklab, var(--accent) 24%, var(--border)); }
  .ai-card .card-b { padding-top: 12px; color: var(--ink-2); }
  .ai-card p { margin: 0 0 9px; }
  .ai-card strong { color: var(--ink); }

  /* KPI */
  .kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 15px 16px; }
  .kpi .lbl { color: var(--muted); font-size: 12px; font-weight: 600; display:flex; align-items:center; gap:6px; }
  .kpi .val { font-size: 27px; font-weight: 700; letter-spacing: -.6px; margin: 6px 0 4px; }
  .kpi .row { display: flex; align-items: center; justify-content: space-between; }
  .delta { font-size: 12.5px; font-weight: 700; display: inline-flex; align-items: center; gap: 3px; }
  .delta.up { color: var(--up); } .delta.down { color: var(--down); }
  .delta .cap { color: var(--muted); font-weight: 500; }

  /* grid */
  .grid-2 { display: grid; grid-template-columns: 1.35fr 1fr; gap: 18px; align-items: start; }

  /* tables */
  .tbl-wrap { overflow-x: auto; }
  table { width: 100%; border-collapse: collapse; font-size: 13px; }
  th { text-align: left; font-size: 11px; font-weight: 700; letter-spacing: .4px; text-transform: uppercase; color: var(--muted);
    padding: 8px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
  td { padding: 9px 10px; border-bottom: 1px solid var(--surface-3); vertical-align: middle; }
  tr:last-child td { border-bottom: 0; }
  th.r, td.r { text-align: right; }
  .kw { font-weight: 600; color: var(--ink); }
  .url { color: var(--ink-2); font-size: 12.5px; max-width: 340px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; display: inline-block; vertical-align: bottom; }
  .pos { font-weight: 700; font-variant-numeric: tabular-nums; }
  .pos.top { color: var(--good); } .pos.near { color: var(--ok); }
  .chip { font-size: 11px; font-weight: 700; padding: 2px 7px; border-radius: 999px; display: inline-flex; align-items: center; gap: 4px; }
  .chip.up { color: var(--up); background: var(--good-soft); } .chip.down { color: var(--down); background: var(--bad-soft); }
  .chip.new { color: var(--accent); background: var(--accent-soft); }
  .star { color: var(--ok); }
  tr.hl td { background: color-mix(in oklab, var(--ok) 8%, transparent); }

  /* donut + legend */
  .health { display: grid; grid-template-columns: 132px 1fr; gap: 16px; align-items: center; }
  .donut-wrap { position: relative; width: 132px; height: 132px; }
  .donut-center { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
  .donut-center b { font-size: 24px; font-weight: 700; letter-spacing: -.5px; }
  .donut-center small { color: var(--muted); font-size: 11px; display:block; }
  .legend { display: flex; flex-direction: column; gap: 9px; }
  .legend .li { display: flex; align-items: center; gap: 9px; font-size: 13px; }
  .legend .sw { width: 11px; height: 11px; border-radius: 3px; flex: none; }
  .legend .li b { margin-left: auto; font-variant-numeric: tabular-nums; }
  .legend .li .pct { color: var(--muted); width: 42px; text-align: right; font-variant-numeric: tabular-nums; }

  /* position distribution bars */
  .dist { display: flex; flex-direction: column; gap: 11px; margin-top: 4px; }
  .dist .bar-row { display: grid; grid-template-columns: 76px 1fr 44px; gap: 10px; align-items: center; font-size: 12.5px; }
  .dist .track { height: 12px; background: var(--surface-3); border-radius: 999px; overflow: hidden; }
  .dist .fill { height: 100%; background: var(--accent); border-radius: 999px; }
  .dist .cnt { text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--ink-2); }
  .dist .bar-row.q1 .fill { background: var(--good); } .dist .bar-row.q2 .fill { background: var(--accent); }
  .dist .bar-row.q3 .fill { background: var(--ok); } .dist .bar-row.q4 .fill { background: var(--neutral); }

  /* progress mini */
  .prog { display:flex; align-items:center; gap:12px; margin-top:2px; }
  .prog .track { flex:1; height:10px; background:var(--surface-3); border-radius:999px; overflow:hidden; }
  .prog .fill { height:100%; background: linear-gradient(90deg, var(--good), var(--accent)); border-radius:999px; }
  .prog b { font-variant-numeric: tabular-nums; }

  /* content list */
  .clist { display: flex; flex-direction: column; gap: 2px; }
  .cli { display: flex; align-items: center; gap: 11px; padding: 9px 6px; border-radius: 9px; }
  .cli:hover { background: var(--surface-2); }
  .cli .ico { width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; flex: none; font-size: 14px; }
  .cli .ico.post { background: var(--accent-soft); } .cli .ico.prod { background: var(--good-soft); }
  .cli .t { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .cli .t small { display: block; color: var(--muted); font-weight: 500; font-size: 11.5px; }
  .cli .score { margin-left: auto; font-weight: 700; font-size: 12px; padding: 3px 9px; border-radius: 999px; }
  .score.g { color: var(--good); background: var(--good-soft); } .score.o { color: var(--ok); background: var(--ok-soft); }
  .score.b { color: var(--bad); background: var(--bad-soft); }

  /* recommendations */
  .recs { display: flex; flex-direction: column; gap: 10px; }
  .rec { display: grid; grid-template-columns: auto 1fr; gap: 12px; padding: 13px 14px; border: 1px solid var(--border); border-radius: 11px; background: var(--surface-2); }
  .rec .pri { align-self: start; font-size: 10.5px; font-weight: 800; letter-spacing: .3px; text-transform: uppercase; padding: 4px 9px; border-radius: 7px; white-space: nowrap; }
  .pri.cao { color: #fff; background: var(--bad); } .pri.tb { color: var(--accent-ink); background: var(--accent); } .pri.thap { color: var(--ink-2); background: var(--neutral-soft); }
  .rec .act { color: var(--ink-2); }
  .rec .act b { color: var(--ink); }
  .rec .tag { font-size: 11px; color: var(--muted); margin-top: 4px; display: inline-flex; gap: 8px; align-items:center; flex-wrap:wrap; }
  .rec .tag a { font-weight: 600; }

  /* AI advisor rewrites */
  .rewrite { border:1px dashed color-mix(in oklab, var(--accent) 40%, var(--border)); border-radius: 11px; padding: 13px 14px; background: color-mix(in oklab, var(--accent-soft) 45%, var(--surface)); }
  .rewrite .lab { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing:.3px; color: var(--muted); margin-bottom: 7px; }
  .opt { padding: 8px 0; border-top: 1px solid var(--border); }
  .opt:first-of-type { border-top: 0; padding-top: 0; }
  .opt .ttl { font-weight: 600; }
  .opt .meta { color: var(--muted); font-size: 12px; margin-top: 2px; }

  .sec-title { display:flex; align-items:center; gap:10px; margin: 4px 2px 0; }
  .sec-title h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted); font-weight: 700; }
  .sec-title .ln { flex:1; height:1px; background: var(--border); }

  .viewer-hidden { display: none !important; }
  .viewer-note { display:none; }
  body.role-viewer .viewer-note { display:flex; }
  .viewer-note { align-items:center; gap:8px; background: var(--surface-2); border:1px dashed var(--border); color: var(--muted);
    border-radius: 10px; padding: 10px 14px; font-size: 12.5px; }

  /* Trên mobile: menu trượt ra dạng drawer + nền mờ (mặc định ẩn) */
  @media (max-width: 1000px) {
    .sidebar { transform: translateX(-100%); width: min(84vw, 300px); box-shadow: 0 10px 40px rgba(0,0,0,.35); }
    main { margin-left: 0; }
    body.nav-open .sidebar { transform: translateX(0); }
    body.nav-open .scrim { opacity: 1; visibility: visible; }
    .nav-open-btn { display: flex; }
    body.nav-open .nav-open-btn { display: none; }
    .kpis { grid-template-columns: repeat(2, 1fr); }
    .grid-2 { grid-template-columns: 1fr; }
    .content { padding: 14px; }
    .topbar { padding: 10px 14px 10px 62px; gap: 10px; }
    .crumbs { font-size: 14.5px; }
    .crumbs span { display: block; font-size: 12px; }
  }
  @media (min-width: 1001px) { .scrim { display: none; } }  /* desktop không cần nền mờ */
  @media (max-width: 560px) {
    .kpis { grid-template-columns: 1fr 1fr; }
    .health { grid-template-columns: 108px 1fr; gap: 12px; }
    .updated { display: none; }                 /* tiết kiệm chỗ trên máy nhỏ */
    .kpi .val { font-size: 23px; }
  }
  @media (max-width: 380px) { .kpis { grid-template-columns: 1fr; } }
  @media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

  /* ---------- Login ---------- */
  .login { position: fixed; inset: 0; z-index: 100; display: none; place-items: center; background: var(--bg); padding: 20px; }
  .login.show { display: grid; }
  .login .box { width: 100%; max-width: 372px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); padding: 28px 26px; }
  .login .logo { width: 46px; height: 46px; border-radius: 12px; object-fit: contain; display: block; margin: 0 auto 14px; box-shadow: var(--shadow); }
  .login h2 { font-size: 20px; letter-spacing: -.3px; }
  .login .tag { color: var(--muted); font-size: 13px; margin: 4px 0 20px; }
  .field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 13px; }
  .field label { font-size: 12px; font-weight: 600; color: var(--ink-2); }
  .field input { font-family: inherit; font-size: 14px; padding: 11px 12px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2); color: var(--ink); }
  .field input:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
  .login .submit { width: 100%; margin-top: 8px; padding: 12px; border: 0; border-radius: 9px; background: var(--accent); color: var(--accent-ink); font-weight: 700; font-size: 14px; font-family: inherit; cursor: pointer; }
  .login .submit:hover { filter: brightness(1.06); }
  .login .hint { margin-top: 16px; font-size: 12px; color: var(--muted); text-align: center; }
  .login .credit { margin-top: 22px; padding-top: 15px; border-top: 1px solid var(--border);
    font-size: 12px; color: var(--muted); text-align: center; letter-spacing: .2px; }
  .login .credit b { color: var(--ink-2); font-weight: 700; letter-spacing: .3px; }

  /* ---------- Users management ---------- */
  .users-grid { display: grid; grid-template-columns: 1fr 330px; gap: 18px; align-items: start; }
  .form-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 12px; }
  .form-row label { font-size: 12px; font-weight: 600; color: var(--ink-2); }
  .form-row input, .form-row select { font-family: inherit; font-size: 13.5px; padding: 9px 11px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2); color: var(--ink); }
  .form-row input:focus, .form-row select:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
  .role-pill { font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 999px; }
  .role-pill.admin { color: var(--accent); background: var(--accent-soft); }
  .role-pill.viewer { color: var(--ink-2); background: var(--neutral-soft); }
  .icon-btn { border: 1px solid var(--border); background: var(--surface); color: var(--ink-2); border-radius: 8px; padding: 5px 9px; cursor: pointer; font-size: 12px; font-family: inherit; }
  .icon-btn:hover { border-color: var(--accent); color: var(--accent); }
  .icon-btn.danger:hover { border-color: var(--bad); color: var(--bad); }
  .btn-full { width: 100%; justify-content: center; }
  .site-checks { display: flex; flex-direction: column; gap: 6px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-2); margin-bottom: 4px; }
  .site-check { display: flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 600; color: var(--ink-2); cursor: pointer; }
  .site-check input { width: 15px; height: 15px; accent-color: var(--accent); }
  @media (max-width: 900px) { .users-grid { grid-template-columns: 1fr; } }