/* Khung trang: thanh trái, thanh trên, menu người dùng, bảng chọn ứng dụng */
/* ----- thanh biểu tượng trái ----- */
.rail { position:fixed; top:0; left:0; bottom:0; width:var(--rail-w); background:var(--surface); border-right:1px solid var(--border); display:flex; flex-direction:column; align-items:center; padding:14px 0 12px; z-index:40; }
.rail__logo { width:48px; height:48px; display:grid; place-items:center; color:var(--text-2); margin-bottom:18px; }
.rail__logo svg { width:30px; height:30px; }
.rail nav { display:flex; flex-direction:column; gap:6px; width:100%; align-items:center; padding:0 6px; }
.rail__item { position:relative; width:100%; display:flex; flex-direction:column; align-items:center; gap:6px; padding:12px 4px 10px; color:var(--icon); border-radius:10px; text-decoration:none; transition:color .15s, background .15s; }
.rail__item svg { width:22px; height:22px; }
.rail__item span.t { font-size:12.5px; line-height:1.15; text-align:center; }
.rail__item:hover { color:var(--text); background:var(--hover); }
.rail__item[aria-current="page"] { color:var(--primary); background:var(--rail-active); }
.rail__item .n { display:none; }
.rail__item .n.hot { display:block; position:absolute; top:6px; left:calc(50% + 6px); min-width:18px; height:18px; padding:0 5px; border-radius:99px; background:var(--danger); color:#fff; border:2px solid var(--surface); box-sizing:content-box; font-size:11px; font-weight:600; line-height:18px; text-align:center; font-variant-numeric:tabular-nums; }

/* ----- thanh trên ----- */
.main { margin-left:var(--rail-w); min-width:0; }
.topbar { position:sticky; top:0; z-index:30; height:var(--top-h); display:flex; align-items:center; gap:12px; padding:0 24px; background:var(--surface); border-bottom:1px solid var(--border); }
.topbar__title { display:flex; align-items:center; gap:10px; min-width:0; flex:1; }
.topbar h1 { font-size:22px; font-weight:500; letter-spacing:-.2px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.icons { position:relative; display:flex; align-items:center; gap:14px; flex:none; }
.icon-btn { position:relative; width:44px; height:44px; border-radius:50%; display:grid; place-items:center; color:var(--icon); background:none; border:0; }
.icon-btn svg { width:24px; height:24px; }
.icon-btn:hover, .icon-btn[aria-expanded="true"] { background:var(--surface-2); color:var(--text); }
.icon-btn:disabled { cursor:default; opacity:.6; }
.icon-btn .count { position:absolute; top:3px; right:1px; min-width:18px; height:18px; padding:0 5px; border-radius:99px; background:var(--danger); color:#fff; border:2px solid var(--surface); box-sizing:content-box; font-size:11px; font-weight:600; line-height:18px; text-align:center; font-variant-numeric:tabular-nums; }
.avatar { width:48px; height:48px; border-radius:50%; display:grid; place-items:center; background:var(--avatar); color:#fff; font-weight:500; font-size:22px; border:0; padding:0; margin-left:4px; flex:none; }
.avatar svg { width:24px; height:24px; }
.avatar img { width:100%; height:100%; border-radius:50%; object-fit:cover; display:block; }
/* ảnh đại diện bấm được để đổi: rê chuột hiện lớp mờ có biểu tượng máy ảnh */
.av-edit { position:relative; cursor:pointer; }
.av-edit .av-cam { position:absolute; inset:0; border-radius:50%; display:grid; place-items:center; background:rgba(0,0,0,.45); color:#fff; opacity:0; transition:opacity .15s; }
.av-edit:hover .av-cam, .av-edit:focus-visible .av-cam { opacity:1; }
.av-edit .av-cam svg { width:24px; height:24px; }
button.avatar:hover, button.avatar[aria-expanded="true"] { box-shadow:0 0 0 3px var(--avatar-ring); }
.avatar--sm { width:38px; height:38px; font-size:16px; margin:0; }
.avatar--sm svg { width:20px; height:20px; }
.pop { position:absolute; right:0; top:calc(100% + 10px); width:min(340px, calc(100vw - 24px)); background:var(--surface); border:1px solid var(--border); border-radius:12px; box-shadow:var(--shadow-lg); overflow:hidden; z-index:50; }
.pop h3 { font-size:14px; font-weight:600; padding:12px 14px; border-bottom:1px solid var(--border); }
.pop ul { list-style:none; margin:0; padding:6px; max-height:min(380px, 60vh); overflow-y:auto; }
.pop li button { display:grid; gap:3px; width:100%; text-align:left; padding:10px; border:0; border-radius:8px; background:none; }
.pop li button:hover { background:var(--surface-2); }
.pop__head { display:flex; align-items:center; gap:10px; padding:12px 14px; border-bottom:1px solid var(--border); }
.pop__name { font-weight:600; }
.pop .rows { display:grid; gap:8px; padding:12px 14px; font-size:13px; }

/* ----- chuông thông báo ----- */
.pop--alerts { width:min(400px, calc(100vw - 24px)); border-radius:14px; }
.al-head { display:flex; align-items:baseline; justify-content:space-between; gap:10px; padding:16px 18px 12px; }
.pop .al-head h3 { padding:0; border:0; font-size:16px; }
.al-tabs { display:flex; gap:4px; margin:0 14px 10px; padding:4px; border-radius:10px; background:var(--muted-bg); }
.al-tab { flex:1; display:flex; align-items:center; justify-content:center; gap:6px; padding:7px 6px; border:0; border-radius:7px; background:none; color:var(--text-2); font-size:13px; font-weight:500; white-space:nowrap; }
.al-tab:hover { color:var(--text); }
.al-tab[aria-selected="true"] { background:var(--surface); color:var(--text); box-shadow:var(--shadow-sm), 0 0 0 1px var(--border); }
.al-tab .c { min-width:20px; padding:0 6px; border-radius:99px; background:var(--surface); color:var(--text-2); font-size:11.5px; line-height:18px; font-variant-numeric:tabular-nums; }
.al-tab[aria-selected="true"] .c { background:var(--primary-050); color:var(--primary); }
.pop ul.al-list { padding:6px 8px 8px; max-height:min(440px, 62vh); border-top:1px solid var(--border); scrollbar-width:thin; scrollbar-color:var(--border-2) transparent; }
.pop li button.al-item, .pop li div.al-item { display:flex; align-items:flex-start; gap:12px; padding:10px; }
.al-ic { flex:none; display:grid; place-items:center; width:36px; height:36px; border-radius:50%; }
.al-ic svg { width:18px; height:18px; }
.al-ic.al-red { background:var(--danger-050); color:var(--danger); }
.al-ic.al-amber { background:var(--warning-050); color:var(--warning-ink); }
.al-ic.al-green { background:var(--success-050); color:var(--success); }
.al-ic.al-blue { background:var(--info-050); color:var(--info); }
/* thẻ Tất cả: chấm đỏ = hoạt động mới chưa xem */
.al-ic.al-new { position:relative; }
.al-ic.al-new::after { content:""; position:absolute; top:0; right:0; width:9px; height:9px; border-radius:50%; background:var(--primary); box-shadow:0 0 0 2px var(--surface); }
.al-who { color:var(--text); font-size:13.5px; font-weight:600; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.al-body { display:grid; gap:3px; min-width:0; flex:1; }
.al-top { display:flex; align-items:center; gap:8px; min-width:0; }
.al-top .plate { font-size:12px; padding:0 6px; border-width:1px; line-height:20px; }
.al-tag { font-size:12px; font-weight:600; }
.al-tag.al-red { color:var(--danger); }
.al-tag.al-amber { color:var(--warning-ink); }
.al-when { margin-left:auto; color:var(--text-3); font-size:12px; white-space:nowrap; font-variant-numeric:tabular-nums; }
.al-text { color:var(--text-2); font-size:13px; line-height:1.4; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.al-text b { color:var(--text); font-weight:600; }
.al-meta { color:var(--text-3); font-size:12px; }
.al-empty { padding:28px 16px; text-align:center; color:var(--text-3); font-size:13px; }

/* ----- menu người dùng (bấm ảnh đại diện) ----- */
.pop--user { width:min(336px, calc(100vw - 24px)); border-radius:14px; }
.um-head { display:flex; align-items:center; gap:16px; padding:22px 18px 20px; border-bottom:1px solid var(--border); }
.avatar--lg { width:60px; height:60px; font-size:28px; margin:0; box-shadow:0 0 0 2px var(--surface), 0 0 0 3.5px var(--primary); }
.avatar--lg svg { width:30px; height:30px; }
.um-name { font-size:18px; font-weight:600; color:var(--primary); line-height:1.25; overflow-wrap:anywhere; }
.um-sub { display:flex; align-items:center; gap:7px; color:var(--text-3); font-size:13.5px; margin-top:4px; }
.um-sub svg { width:15px; height:15px; flex:none; }
.um-list { display:grid; padding:8px; }
.um-item { display:flex; align-items:center; gap:13px; width:100%; padding:11px 10px; border:0; background:none; border-radius:8px; font-size:15px; color:var(--text); text-align:left; text-decoration:none; }
.um-item > svg { width:21px; height:21px; color:var(--icon); flex:none; }
.um-item:hover { background:var(--surface-2); }
.um-item .end { margin-left:auto; display:flex; align-items:center; gap:6px; color:var(--text-3); }
.um-item .end svg { width:18px; height:18px; }
.swatch { width:26px; height:26px; border-radius:50%; background:var(--primary); box-shadow:0 0 0 2px var(--surface), 0 0 0 3.5px var(--primary); margin-right:3px; }
.um-sep { height:1px; background:var(--border); margin:6px 10px; }
.um-item--danger, .um-item--danger > svg { color:var(--danger); }
/* ----- hướng dẫn sử dụng ----- */
dialog.guide-dlg { width:min(1180px, calc(100vw - 24px)); height:min(880px, calc(100vh - 24px)); max-height:none; }
dialog.guide-dlg[open] { display:flex; flex-direction:column; }
.guide-wrap { flex:1; min-height:0; display:grid; grid-template-columns:240px minmax(0,1fr); }
.guide-nav { border-right:1px solid var(--border); overflow:auto; align-content:start; gap:2px; }
.guide-nav .um-item { font-size:14px; padding:9px 10px; }
.guide-n { display:inline-grid; place-items:center; width:22px; height:22px; border-radius:50%; background:var(--surface-2); color:var(--text-2); font-size:12px; font-weight:600; flex:none; }
.guide-nav .um-item[aria-pressed="true"] { background:var(--primary-050); color:var(--primary-600); }
.guide-nav .um-item[aria-pressed="true"] .guide-n { background:var(--primary); color:#fff; }
.guide-body { overflow:auto; padding:20px 28px 36px; font-size:14.5px; line-height:1.6; }
.guide-body h3 { font-size:20px; font-weight:600; margin:0 0 8px; }
.guide-body h4 { font-size:15.5px; font-weight:600; margin:22px 0 6px; }
.guide-body p { margin:6px 0; }
.guide-body ol { margin:6px 0; padding-left:22px; display:grid; gap:6px; }
.guide-body .badge { height:20px; padding:0 8px; vertical-align:1px; }
.guide-fig { margin:12px 0 10px; border:1px solid var(--border); border-radius:10px; overflow:hidden; background:var(--surface-2); box-shadow:var(--shadow-sm, 0 1px 3px rgba(0,0,0,.06)); }
.guide-fig.small { max-width:640px; }
.guide-fig img { display:block; width:100%; height:auto; }
.guide-fig figcaption { padding:7px 12px; font-size:12.5px; color:var(--text-2); border-top:1px solid var(--border); background:var(--surface); }
.guide-note { margin-top:14px; line-height:1.55; }
@media (max-width:760px) {
  .guide-wrap { grid-template-columns:minmax(0,1fr); grid-template-rows:auto minmax(0,1fr); }
  .guide-wrap .guide-nav { display:flex; overflow-x:auto; border-right:0; border-bottom:1px solid var(--border); }
  .guide-wrap .guide-nav .um-item { white-space:nowrap; width:auto; flex:none; }
  .guide-body { padding:16px; }
}

/* ----- bảng chọn ứng dụng (bấm biểu tượng ô vuông) ----- */
button.rail__logo { border:0; background:none; border-radius:12px; }
button.rail__logo:hover, button.rail__logo[aria-expanded="true"] { background:var(--hover); color:var(--text); }
.launcher { position:fixed; left:calc(var(--rail-w) + 8px); top:12px; right:auto; width:min(380px, calc(100vw - 24px)); border-radius:16px; }
.launcher h3 { font-size:13px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; padding:18px 20px 4px; border:0; }
.apps { display:grid; grid-template-columns:repeat(3, minmax(0,1fr)); gap:6px; padding:10px 12px 14px; }
.app { display:grid; justify-items:center; gap:10px; padding:16px 6px 12px; border-radius:14px; text-decoration:none; color:var(--text); font-size:14px; text-align:center; }
.app:hover, .app[aria-current] { background:var(--hover); }
.app i { width:56px; height:56px; display:grid; place-items:center; border-radius:14px; border:1px solid transparent; }
.app i svg { width:26px; height:26px; }
.app .a-blue { background:var(--info-050); color:var(--info); border-color:#cfe1fb; }
.app .a-red { background:var(--primary-050); color:var(--primary); border-color:var(--primary-050); }