:root {
  --bg: #000;
  --surface: #1c1d20;
  --surface-2: #2b2d31;
  --line: #3a3b3f;
  --text: #fff;
  --muted: #b4b6ba;
  --red: #d7262e;
  --blue: #3fb6f0;
  --green: #3ccf7a;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[hidden] { display: none !important; }

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(12px);
  z-index: 5;
}
.logo { height: 34px; }
.topbar-title { color: var(--muted); font-weight: 600; }
.topbar-user { margin-left: auto; display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }

.center { min-height: calc(100vh - 64px); display: grid; place-items: center; padding: 24px; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.login-card { width: min(380px, 100%); padding: 28px; display: grid; gap: 14px; }
.login-card h1 { margin: 0; font-size: 22px; }

label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
input {
  width: 100%;
  padding: 11px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #0e0e10;
  color: var(--text);
  font: inherit;
}
input:focus { outline: none; border-color: var(--blue); }
input.invalid { border-color: var(--red); }

.btn {
  border: 0;
  border-radius: 999px;
  padding: 10px 18px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-primary { background: #fff; color: #000; }
.btn-ghost { background: var(--surface-2); color: var(--text); padding: 7px 14px; font-size: 13px; }
.btn-small { padding: 6px 12px; font-size: 12px; }

.muted { color: var(--muted); margin: 0; }
.mono { font-family: ui-monospace, Menlo, monospace; font-size: 12px; color: var(--muted); word-break: break-all; }
.error { color: #ff6b70; margin: 0; font-size: 13px; }

.tabs {
  display: flex;
  gap: 8px;
  padding: 18px 24px 0;
  overflow-x: auto;
}
.tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 8px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  font: inherit;
}
.tab img { width: 26px; height: 26px; border-radius: 50%; object-fit: contain; background: #000; }
.tab.active { background: #fff; color: #000; border-color: #fff; }

#brand-panel { padding: 20px 24px 120px; max-width: 1000px; }

.brand-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}
.brand-head img.banner { width: 220px; aspect-ratio: 4 / 1; object-fit: cover; border-radius: 10px; }
.brand-head h2 { margin: 0; font-size: 22px; }

.row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  align-items: center;
  padding: 12px;
  border-bottom: 1px solid var(--line);
}
.row img { width: 64px; height: 64px; object-fit: cover; border-radius: 10px; }
.row-main { display: grid; gap: 8px; min-width: 0; }
.row-title { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.row-title strong { font-size: 15px; }
.pill { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); }
.pill.set { background: rgba(60, 207, 122, 0.15); color: var(--green); }
.pill.default { background: rgba(63, 182, 240, 0.15); color: var(--blue); }
.row-input { display: flex; gap: 8px; }
.row-input input { flex: 1; min-width: 0; }

.savebar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  padding: 14px 24px;
  background: rgba(20, 20, 22, 0.95);
  border-top: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 84px;
  transform: translateX(-50%);
  background: #fff;
  color: #000;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

@media (max-width: 640px) {
  .brand-head img.banner { width: 140px; }
  .row-input { flex-direction: column; }
}