:root {
  --bg: #f0f7ff;
  --panel: #ffffff;
  --line: #cfe0f5;
  --text: #243447;
  --muted: #6e849c;
  --accent: #5ba3f0;
  --accent-hover: #3f8de6;
  --accent-soft: #e8f3ff;
  --ok: #0f8a5f;
  --ok-soft: #e8f7f0;
  --warn: #b86e00;
  --warn-soft: #fff6e5;
  --danger: #d64545;
  --danger-soft: #fff0f0;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --display: "Georgia", "Songti SC", "SimSun", serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }

[hidden], .is-hidden {
  display: none !important;
}

.error {
  color: var(--danger);
  font-size: 14px;
  padding: 10px 12px;
  background: var(--danger-soft);
  border: 1px solid #f0b4b4;
  border-radius: 8px;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}
input, select, textarea {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  outline: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 163, 240, 0.18);
}
label { display: block; font-size: 13px; color: var(--muted); }
.captcha-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
}
.captcha-field { margin: 0; }
.captcha-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 0;
  cursor: pointer;
  line-height: 0;
  overflow: hidden;
}
.captcha-btn:hover { border-color: var(--accent); }
.captcha-btn img {
  display: block;
  width: 140px;
  height: 44px;
}
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 140px; }

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover {
  border-color: #a8c6ea;
  background: var(--accent-soft);
}
.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
}
.btn.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn.ghost { background: transparent; }
.btn.danger {
  border-color: #f0b4b4;
  color: var(--danger);
  background: var(--danger-soft);
}

.ok { color: var(--ok); }
.muted { color: var(--muted); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; }

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
  background: var(--bg);
}
.login-panel {
  width: min(420px, 100%);
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.brand, .logo {
  font-family: var(--display);
  font-size: clamp(36px, 7vw, 48px);
  letter-spacing: -0.03em;
  margin: 0 0 28px;
  color: var(--accent);
  text-align: center;
  font-weight: 600;
}
.side-brand .logo {
  font-size: 22px;
  text-align: left;
  margin: 0;
}
.login-panel h1 {
  margin: 0;
}
.sub, .hint { color: var(--muted); line-height: 1.5; }
.auth-title {
  margin: -12px 0 18px;
  text-align: center;
  font-size: 16px;
  color: var(--muted);
}
.auth-switch {
  margin: 18px 0 0;
  text-align: center;
}
.link-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--accent-hover);
  cursor: pointer;
  font: inherit;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.link-btn:hover { color: var(--accent); }
.reg { margin-top: 18px; color: var(--muted); }
.reg summary { cursor: pointer; margin-bottom: 10px; }

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 240px 1fr;
}
.sidebar {
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.side-brand { padding: 8px 10px 4px; }
.side-brand .tag {
  display: block;
  margin-top: 2px;
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}
#nav { display: grid; gap: 4px; flex: 1; }
#nav button {
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 10px 12px;
  border-radius: 8px;
  cursor: pointer;
}
#nav button.active, #nav button:hover {
  background: var(--accent-soft);
  color: #2f77c7;
  font-weight: 600;
}
.side-user {
  border-top: 1px solid var(--line);
  padding-top: 14px;
  display: grid;
  gap: 10px;
}
.side-user strong { display: block; }
main { padding: 22px 28px 40px; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}
.topbar h2 {
  margin: 0;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.content { display: grid; gap: 16px; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.card {
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
}
.card .label { color: var(--muted); font-size: 12px; }
.card .value {
  margin-top: 8px;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text);
}

.panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  overflow: hidden;
}
.panel-h {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  background: var(--accent-soft);
}
.panel-b { padding: 16px; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 500; }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
  border: 1px solid var(--line);
  background: #fff;
}
.badge.active {
  color: var(--ok);
  border-color: #b7e4d0;
  background: var(--ok-soft);
}
.badge.pending {
  color: var(--warn);
  border-color: #f0d7a8;
  background: var(--warn-soft);
}
.badge.paused, .badge.disabled, .badge.ended {
  color: var(--muted);
  background: #f4f6f8;
}
.badge.cpm { color: #2f77c7; background: #e8f3ff; border-color: #b9d7f7; }
.badge.cpc { color: #0f8a5f; background: #e8f7f0; border-color: #b7e4d0; }
.badge.cpi { color: #8a5a00; background: #fff6e5; border-color: #f0d7a8; }
.badge.cps { color: #7a3db8; background: #f5edff; border-color: #d9c2f2; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}
.chart {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 8px;
  align-items: end;
  min-height: 140px;
  padding-top: 8px;
}
.bar {
  background: var(--accent);
  border-radius: 6px 6px 2px 2px;
  min-height: 4px;
  position: relative;
}
.bar span {
  position: absolute;
  bottom: -18px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: var(--muted);
  white-space: nowrap;
}
.embed {
  white-space: pre-wrap;
  word-break: break-all;
  background: var(--accent-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  color: #334155;
}

.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(36, 52, 71, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 50;
}
.modal {
  width: min(560px, 100%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}
.modal-h {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--accent-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-b { padding: 16px; display: grid; gap: 12px; }
.modal-f {
  padding: 12px 16px 16px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
  .help {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
  padding: 10px 12px;
  background: var(--accent-soft);
  border-radius: 8px;
  border: 1px solid var(--line);
}

.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.hub-card {
  display: block;
  text-align: left;
  padding: 28px 24px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
  color: inherit;
  transition: border-color .15s ease, background .15s ease;
}
.hub-card:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.hub-card h3 {
  margin: 0 0 8px;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.hub-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
  font-size: 14px;
}
.hub-card .hub-meta {
  margin-top: 18px;
  font-size: 13px;
  color: var(--accent-hover);
  font-weight: 600;
}
.hub-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 14px;
}
.hub-stat {
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--line);
}
.hub-stat .k {
  display: block;
  font-size: 11px;
  color: var(--muted);
}
.hub-stat .v {
  display: block;
  margin-top: 2px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.traffic-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 16px;
}
@media (max-width: 960px) {
  .traffic-grid { grid-template-columns: 1fr; }
  .hub-stats { grid-template-columns: 1fr; }
}
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  background: var(--danger);
}
.status-dot.ok { background: var(--ok); }
.crumb {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--muted);
}
.crumb button {
  border: 0;
  background: transparent;
  color: var(--accent-hover);
  cursor: pointer;
  padding: 0;
  font: inherit;
}

@media (max-width: 860px) {
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
  #nav { grid-auto-flow: column; overflow: auto; }
}