:root {
  --ink: #191c1e;
  --paper: #f8f9fb;
  --card: #ffffff;
  --blue: #d4e6eb;
  --pink: #f3dce7;
  --line: 4px solid #191c1e;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--paper); color: var(--ink); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; }
.hidden { display: none !important; }
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, var(--blue), var(--paper));
}
.login-card, .panel {
  background: var(--card);
  border: var(--line);
  box-shadow: 8px 8px 0 #191c1e;
  border-radius: 8px;
}
.login-card { width: min(420px, 92vw); padding: 36px 32px 28px; }
.kicker { letter-spacing: 0.18em; font-size: 12px; font-weight: 800; margin: 0 0 8px; }
h1, h2, h3 { margin: 0 0 12px; }
.sub, .head-row p, .panel p { color: #424849; line-height: 1.6; }
label { display: block; font-size: 13px; font-weight: 700; margin: 16px 0 6px; }
input {
  width: 100%;
  padding: 12px 14px;
  border: 3px solid #c2c7c9;
  border-radius: 12px;
  font-size: 15px;
}
.btn, .nav-btn, .mini {
  border: var(--line);
  background: var(--blue);
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
}
.btn { width: 100%; margin-top: 20px; padding: 12px; border-radius: 12px; }
.error { color: #ba1a1a; min-height: 20px; font-size: 13px; }
#app-view { display: flex; min-height: 100vh; }
.side {
  width: 240px;
  background: #111;
  color: #fff;
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.brand { display: flex; gap: 10px; align-items: center; }
.dot { width: 14px; height: 14px; background: #3ddc84; border-radius: 50%; }
.brand small { display: block; color: #9aa; }
.nav-btn {
  display: block;
  width: 100%;
  text-align: left;
  margin-bottom: 10px;
  padding: 12px;
  border-radius: 8px;
  background: transparent;
  color: #fff;
  border-color: #333;
}
.nav-btn.active { background: var(--blue); color: var(--ink); border-color: #fff; }
.logout { margin-top: auto; background: var(--pink); padding: 10px; border-radius: 8px; }
.main { flex: 1; padding: 36px 40px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.panel { padding: 24px; }
.ours { background: #e0f2f7; }
.theirs { background: #f3dce7; }
.form { margin: 20px 0 28px; }
.banner-list { display: grid; gap: 16px; }
.banner-item {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 16px;
  align-items: center;
  background: #fff;
  border: var(--line);
  padding: 12px;
}
.banner-item img { width: 160px; height: 90px; object-fit: cover; background: #111; }
.ops { display: flex; flex-direction: column; gap: 8px; }
.mini { padding: 6px 10px; border-radius: 8px; background: #fff; }
.mini.danger { background: #ffecec; }
@media (max-width: 900px) {
  #app-view { flex-direction: column; }
  .side { width: 100%; flex-direction: row; align-items: center; }
  .grid-2, .banner-item { grid-template-columns: 1fr; }
}