:root {
  --bg: #f4f1ec;
  --card: #ffffff;
  --ink: #1c1917;
  --muted: #78716c;
  --line: #e7e5e4;
  --accent: #0f766e;
  --danger: #b91c1c;
  --warn: #c2410c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(ellipse 50% 40% at 0% 0%, rgba(15, 118, 110, 0.08), transparent 60%),
    var(--bg);
  min-height: 100vh;
}

.hidden { display: none !important; }

.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(400px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 32px 28px;
  box-shadow: 0 12px 40px rgba(28, 25, 23, 0.06);
}

.login-card h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0.04em;
}

.sub {
  margin: 8px 0 24px;
  color: var(--muted);
  font-size: 14px;
}

.login-card label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 14px;
}

.login-card input,
.toolbar input,
.toolbar select,
.form input,
.form textarea,
.form select {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  background: #fff;
}

.login-card button,
.btn {
  appearance: none;
  border: 0;
  border-radius: 10px;
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.login-card button {
  width: 100%;
  margin-top: 8px;
  padding: 12px;
}

.btn.ghost {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn.danger {
  background: var(--danger);
}

.error {
  min-height: 20px;
  color: var(--danger);
  font-size: 13px;
  margin: 12px 0 0;
}

.main-view {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: #1c1917;
  color: #fafaf9;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.brand {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding: 0 8px;
}

.nav {
  text-align: left;
  background: transparent;
  border: 0;
  color: #d6d3d1;
  padding: 12px 12px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
}

.nav.active,
.nav:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.logout {
  margin-top: auto;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  border-radius: 10px;
  padding: 10px;
  cursor: pointer;
}

.content {
  padding: 28px 32px 48px;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
}

.top h2 {
  margin: 0;
  font-size: 24px;
}

.admin-name {
  color: var(--muted);
  font-size: 13px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 14px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
}

.card .n {
  font-size: 28px;
  font-weight: 700;
}

.card .l {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.toolbar input {
  max-width: 280px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

th, td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 13px;
  vertical-align: top;
}

th {
  background: #fafaf9;
  color: var(--muted);
  font-weight: 600;
}

tr:last-child td { border-bottom: 0; }

.muted { color: var(--muted); }
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #ecfdf5;
  color: var(--accent);
}
.tag.off {
  background: #fef2f2;
  color: var(--danger);
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  margin-top: 14px;
}

.msg-list {
  max-height: 520px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg {
  padding: 10px 12px;
  border-radius: 10px;
  background: #fafaf9;
  border: 1px solid var(--line);
}

.msg .meta {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.msg img {
  max-width: 240px;
  border-radius: 8px;
  display: block;
  margin-top: 6px;
}

.form {
  display: grid;
  gap: 12px;
  max-width: 720px;
}

.form textarea {
  min-height: 180px;
  resize: vertical;
  font-family: inherit;
}

.row-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tip {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 12px;
}

@media (max-width: 860px) {
  .main-view { grid-template-columns: 1fr; }
  .sidebar { flex-direction: row; flex-wrap: wrap; align-items: center; }
  .logout { margin-top: 0; margin-left: auto; }
}