/* Trang quản trị: đọc số liệu nhanh, thao tác nhiều, theo sáng/tối của máy. */
:root {
  --bg: #F2F4F6;
  --panel: #FFFFFF;
  --panel-2: #EDF0F3;
  --line: #DCE2E8;
  --fg: #141A20;
  --fg-dim: #5F6E7B;
  --accent: #1B6E58;
  --c-a: #3B7EA1;
  --c-b: #C2820F;
  --c-c: #1B6E58;
  --bad: #A6364A;
  --shadow: 0 1px 2px rgba(20,26,32,.06), 0 10px 26px -20px rgba(20,26,32,.4);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E1319;
    --panel: #161D25;
    --panel-2: #1E2730;
    --line: #2A3440;
    --fg: #E7EDF3;
    --fg-dim: #8CA0B0;
    --accent: #55C6A4;
    --c-a: #67AEDA;
    --c-b: #E3AE55;
    --c-c: #55C6A4;
    --bad: #E57F90;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 10px 26px -20px rgba(0,0,0,.9);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 14.5px/1.55 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
code, .mono { font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-variant-numeric: tabular-nums; }

/* ---- thanh trên ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--panel) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-in {
  max-width: 1180px;
  margin: 0 auto;
  padding: 11px max(16px, env(safe-area-inset-left)) 11px max(16px, env(safe-area-inset-right));
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  text-decoration: none;
  color: var(--fg);
  letter-spacing: -.01em;
}
.brand-dot {
  width: 9px; height: 9px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
.nav { display: flex; flex-wrap: wrap; gap: 4px; }
.nav a {
  text-decoration: none;
  color: var(--fg-dim);
  padding: 6px 11px;
  border-radius: 7px;
  font-weight: 500;
}
.nav a:hover { background: var(--panel-2); color: var(--fg); }
.nav a.on { background: var(--panel-2); color: var(--fg); font-weight: 600; }
.nav a.quiet { color: var(--fg-dim); opacity: .75; }

/* ---- khung trang ---- */
.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px max(16px, env(safe-area-inset-left)) 56px max(16px, env(safe-area-inset-right));
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.page-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: flex-end;
  justify-content: space-between;
}
.page-head h1 { font-size: 23px; margin: 0; letter-spacing: -.02em; }
.sub { margin: 3px 0 0; color: var(--fg-dim); font-size: 13.5px; }
.page-actions { display: flex; flex-wrap: wrap; gap: 8px; }

.btn, .select, input, textarea, select {
  font: inherit;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 12px;
}
.btn { text-decoration: none; cursor: pointer; display: inline-block; }
.btn:hover { background: var(--panel-2); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { filter: brightness(1.07); background: var(--accent); }
.btn-danger { color: var(--bad); border-color: color-mix(in srgb, var(--bad) 40%, var(--line)); }
textarea { width: 100%; min-height: 84px; resize: vertical; line-height: 1.5; }
input:focus-visible, textarea:focus-visible, select:focus-visible, .btn:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* ---- thẻ số ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 15px 17px;
  box-shadow: var(--shadow);
  min-width: 0;
}
.card-label { margin: 0 0 6px; font-size: 12.5px; color: var(--fg-dim); }
.card-value {
  margin: 0;
  font-size: 31px;
  font-weight: 700;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.card-delta { margin: 6px 0 0; font-size: 12.5px; color: var(--fg-dim); }
.card-delta.up { color: var(--accent); }
.card-delta.down { color: var(--bad); }
.card-ref { color: var(--fg-dim); font-weight: 400; }

/* ---- bảng khung ---- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  gap: 14px;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 16px 18px;
  box-shadow: var(--shadow);
  min-width: 0;
}
.panel-head {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
}
.panel-head h2 { font-size: 14.5px; margin: 0; letter-spacing: -.01em; }
.hint, .panel-foot { color: var(--fg-dim); font-size: 12.5px; }
.panel-foot { margin: 12px 0 0; }
.empty { color: var(--fg-dim); font-size: 13.5px; margin: 6px 0; }

.legend-inline { display: flex; flex-wrap: wrap; gap: 4px 13px; font-size: 12px; color: var(--fg-dim); }
.legend-inline span { display: inline-flex; align-items: center; gap: 6px; }
.sw { width: 9px; height: 9px; border-radius: 2px; display: inline-block; }
.sw-a { background: var(--c-a); }
.sw-b { background: var(--c-b); }
.sw-c { background: var(--c-c); }

/* ---- biểu đồ ---- */
.chart { width: 100%; min-width: 0; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { fill: var(--fg-dim); font-size: 10px; font-family: ui-monospace, monospace; }
.chart .bar-zero { opacity: .25; }

/* ---- phễu ---- */
.funnel { display: flex; flex-direction: column; gap: 9px; }
.funnel-row {
  display: grid;
  grid-template-columns: minmax(96px, 1.1fr) 2.4fr auto 42px;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  min-width: 0;
}
.funnel-label { color: var(--fg-dim); min-width: 0; }
.funnel-bar { background: var(--panel-2); border-radius: 999px; height: 9px; overflow: hidden; }
.funnel-bar i { display: block; height: 100%; background: var(--c-a); border-radius: 999px; }
.funnel-value { font-weight: 700; font-variant-numeric: tabular-nums; }
.funnel-rate { color: var(--accent); font-size: 12px; text-align: right; font-variant-numeric: tabular-nums; }

/* ---- vòng tròn tỉ lệ ---- */
.retention { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; }
.donut {
  --pct: 0;
  width: 108px; height: 108px;
  flex: none;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: conic-gradient(var(--accent) calc(var(--pct) * 1%), var(--panel-2) 0);
  position: relative;
}
.donut::before {
  content: '';
  position: absolute;
  inset: 11px;
  border-radius: 999px;
  background: var(--panel);
}
.donut-value {
  position: relative;
  font-weight: 700;
  font-size: 19px;
  font-variant-numeric: tabular-nums;
}
.kv { margin: 0; display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.kv > div { display: flex; justify-content: space-between; gap: 16px; font-size: 13px; }
.kv dt { color: var(--fg-dim); }
.kv dd { margin: 0; font-weight: 600; font-variant-numeric: tabular-nums; }

/* ---- danh sách xếp hạng ---- */
.toplist { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.toplist li {
  display: grid;
  grid-template-columns: 18px 40px 1fr auto;
  gap: 11px;
  align-items: center;
  min-width: 0;
}
.rank { color: var(--fg-dim); font-size: 12px; font-variant-numeric: tabular-nums; text-align: right; }
.thumb { width: 40px; height: 40px; border-radius: 7px; object-fit: cover; background: var(--panel-2); }
.thumb-empty { display: block; }
.toplist-main { display: flex; flex-direction: column; min-width: 0; }
.toplist-main a {
  text-decoration: none;
  color: var(--fg);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.toplist-main a:hover { color: var(--accent); }
.toplist-sub { font-size: 11.5px; color: var(--fg-dim); }
.toplist-count { font-weight: 700; font-variant-numeric: tabular-nums; }

/* ---- bảng ---- */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th, .table td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table th { font-size: 11.5px; text-transform: uppercase; letter-spacing: .08em; color: var(--fg-dim); font-weight: 600; }
.table tbody tr:last-child td { border-bottom: 0; }
.table.compact td { padding: 6px 8px; }
.nowrap { white-space: nowrap; }
.dim { color: var(--fg-dim); }
.ellipsis { max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--fg-dim);
  white-space: nowrap;
}
.tag.ok { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }
.tag.bad { background: color-mix(in srgb, var(--bad) 16%, transparent); color: var(--bad); }
.tag.new { background: color-mix(in srgb, var(--c-a) 18%, transparent); color: var(--c-a); }
.tag.vip { background: color-mix(in srgb, var(--c-b) 20%, transparent); color: var(--c-b); font-weight: 600; }

/* ---- đăng nhập ---- */
.login-body { display: grid; place-items: center; min-height: 100vh; padding: 20px; }
.login {
  width: 100%;
  max-width: 350px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 13px;
  padding: 26px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.login h1 { font-size: 20px; margin: 0; letter-spacing: -.02em; }
.login .sub { margin: 0 0 12px; }
.login label { font-size: 12.5px; color: var(--fg-dim); margin-top: 6px; }
.login button {
  margin-top: 16px;
  background: var(--accent);
  border: 0;
  color: #fff;
  font-weight: 600;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
}
.alert {
  background: color-mix(in srgb, var(--bad) 14%, transparent);
  color: var(--bad);
  padding: 8px 11px;
  border-radius: 7px;
  font-size: 13px;
  margin: 0 0 6px;
}
.ok-note {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  padding: 8px 11px;
  border-radius: 7px;
  font-size: 13px;
  margin: 0;
}

/* ---- form cấu hình ---- */
.form-grid { display: flex; flex-direction: column; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 5px; min-width: 0; }
.field label { font-weight: 600; font-size: 13px; }
.field .help { color: var(--fg-dim); font-size: 12.5px; margin: 0; }
.row-inline { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.check { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; }
.check input { width: 16px; height: 16px; padding: 0; }

/* ---- lưới media trong chi tiết bài ---- */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 9px;
}
.media-cell {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: 9px;
  overflow: hidden;
  background: var(--panel-2);
}
.media-cell img { width: 100%; height: 100%; object-fit: cover; display: block; }
.media-kind {
  position: absolute;
  left: 6px; bottom: 6px;
  font-size: 10.5px;
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(10,14,19,.72);
  color: #fff;
}
.media-cell-empty { display: grid; place-items: center; color: var(--fg-dim); font-size: 11px; text-align: center; padding: 6px; }

/* ---- hộp sao chép link ---- */
.copy-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.copy-row input { flex: 1 1 220px; min-width: 0; font-family: ui-monospace, monospace; font-size: 12.5px; }

.pager { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.pager .on { background: var(--accent); border-color: var(--accent); color: #fff; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.filters input[type="search"] { min-width: 180px; flex: 1 1 200px; }

@media (max-width: 560px) {
  .funnel-row { grid-template-columns: 1fr auto; gap: 4px 10px; }
  .funnel-bar { grid-column: 1 / -1; }
  .ellipsis { max-width: 110px; }
}

/* ---- thẻ nhóm, kênh và mục giới thiệu ---- */
.chat-list { display: flex; flex-direction: column; gap: 11px; }
.chat-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 13px 14px;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 11px;
  min-width: 0;
}
.chat-id { display: flex; flex-wrap: wrap; gap: 11px; align-items: center; }
.chat-avatar {
  width: 38px;
  height: 38px;
  border-radius: 999px;
  object-fit: cover;
  background: var(--panel-2);
  flex: none;
}
.chat-avatar-text {
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--accent);
}
.chat-name { display: flex; flex-direction: column; min-width: 0; flex: 1 1 160px; }
.chat-name strong { font-size: 14.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-name span { font-size: 11.5px; overflow-wrap: anywhere; }

.chat-link { display: flex; flex-wrap: wrap; gap: 10px; }
.chat-link label { display: flex; flex-direction: column; gap: 4px; min-width: 0; flex: 1 1 150px; }
.chat-link label span { font-size: 11.5px; color: var(--fg-dim); }
.chat-link input, .chat-link select { width: 100%; }
.chat-link label:has(.code-input) { flex: 0 1 92px; }
.code-input {
  font-family: ui-monospace, monospace;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.chat-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.chat-note { flex: 1 1 180px; min-width: 0; font-size: 12.5px; }

/* ---- cụm kênh và các nhóm nối vào nó ---- */
.channel-block { border-left: 3px solid var(--accent); }

.channel-head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
  margin-bottom: 12px;
}
.channel-code,
.group-code {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-weight: 700;
  letter-spacing: .04em;
  display: grid;
  place-items: center;
  flex: none;
  border-radius: 8px;
}
.channel-code {
  min-width: 44px;
  height: 44px;
  padding: 0 9px;
  font-size: 17px;
  color: #fff;
  background: var(--accent);
}
.group-code {
  min-width: 34px;
  height: 34px;
  padding: 0 7px;
  font-size: 13.5px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.channel-head .chat-name { flex: 1 1 180px; }
.channel-head .hint { white-space: nowrap; }


@media (max-width: 560px) {
  .channel-code { min-width: 38px; height: 38px; font-size: 15px; }
  .channel-head .hint { flex-basis: 100%; }
}

/* ---- xem ảnh và video ngay trong trang ---- */
.media-cell {
  border: 0;
  padding: 0;
  cursor: pointer;
  font: inherit;
  color: inherit;
  display: block;
  width: 100%;
  transition: transform .14s, box-shadow .14s;
}
.media-cell:hover { transform: translateY(-2px); box-shadow: 0 8px 20px -12px rgba(0,0,0,.6); }
.media-size {
  position: absolute;
  right: 6px;
  top: 6px;
  font-size: 10.5px;
  padding: 2px 6px;
  border-radius: 999px;
  background: rgba(10,14,19,.72);
  color: #fff;
}

.viewer {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(6, 9, 13, .93);
  display: grid;
  grid-template-columns: 56px 1fr 56px;
  grid-template-rows: 1fr auto;
  align-items: center;
  padding: 16px;
}
.viewer-stage {
  grid-column: 2;
  display: grid;
  place-items: center;
  min-width: 0;
  min-height: 0;
  max-height: 82vh;
}
.viewer-stage img,
.viewer-stage video {
  max-width: 100%;
  max-height: 82vh;
  border-radius: 10px;
  display: block;
  background: #000;
}
.viewer-close {
  position: absolute;
  top: 12px;
  right: 16px;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.08);
  color: #fff;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}
.viewer-nav {
  width: 44px;
  height: 64px;
  border-radius: 10px;
  border: 0;
  background: rgba(255,255,255,.07);
  color: #fff;
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
}
.viewer-nav:hover { background: rgba(255,255,255,.15); }
.viewer-prev { grid-column: 1; justify-self: start; }
.viewer-next { grid-column: 3; justify-self: end; }
.viewer-caption {
  grid-column: 1 / -1;
  grid-row: 2;
  text-align: center;
  color: rgba(255,255,255,.7);
  font-size: 13px;
  margin: 12px 0 0;
}

@media (max-width: 560px) {
  .viewer { grid-template-columns: 40px 1fr 40px; padding: 10px; }
  .viewer-nav { width: 36px; height: 52px; font-size: 24px; }
}

/* ---- hàng gọn cho nhóm và kênh ---- */
.cx-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
  padding: 9px 0;
}
.cx-row.is-off { opacity: .55; }
.cx-row .chat-name { flex: 1 1 170px; }
.cx-facts { display: flex; flex-wrap: wrap; gap: 6px; }
.tag.off { background: var(--panel-2); color: var(--fg-dim); }

.cx-children {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 6px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}
.cx-children .cx-row { padding: 7px 0; }
.cx-children .cx-row + .cx-row { border-top: 1px solid var(--line); }
.cx-indent { margin: 6px 0 0 14px; }

/* ---- popup chỉnh sửa ---- */
.sheet-dialog {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  color: var(--fg);
  padding: 0;
  width: min(520px, calc(100vw - 32px));
  box-shadow: 0 24px 60px -24px rgba(0,0,0,.7);
}
.sheet-dialog::backdrop { background: rgba(6, 9, 13, .62); }

.sheet-form { display: flex; flex-direction: column; gap: 14px; padding: 18px 20px 20px; }
.sheet-head { display: flex; gap: 12px; align-items: center; position: relative; padding-right: 40px; }
.sheet-head .chat-name { flex: 1 1 auto; }
.sheet-x {
  position: absolute;
  top: -4px;
  right: -4px;
  background: var(--panel-2);
  border-color: var(--line);
  color: var(--fg-dim);
}
.sheet-x:hover { color: var(--fg); }
.sheet-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.sheet-grid .field { flex: 1 1 180px; min-width: 0; }
.sheet-grid .field input, .sheet-grid .field select { width: 100%; }
.sheet-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}