:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --border: #e5e7eb;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --danger: #dc2626;
  --success: #16a34a;
  --warning: #d97706;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.app { display: flex; min-height: 100vh; }

.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: #14162b;
  color: #fff;
  padding: 20px 0;
  display: flex;
  flex-direction: column;
}
.sidebar .brand {
  font-size: 18px;
  font-weight: 700;
  padding: 0 20px 20px;
  color: #fff;
}
.sidebar .brand span { color: #8b8ffc; }
.sidebar nav { flex: 1; }
.sidebar nav a {
  display: block;
  padding: 10px 20px;
  color: #c6c8e0;
  font-weight: 500;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,.06); text-decoration: none; color: #fff; }
.sidebar nav a.active { background: rgba(255,255,255,.08); border-left-color: #8b8ffc; color: #fff; }
.sidebar .user-box {
  padding: 14px 20px;
  border-top: 1px solid rgba(255,255,255,.1);
  font-size: 12.5px;
  color: #9ea0c4;
}
.sidebar .user-box a { color: #c6c8e0; }

.main { flex: 1; min-width: 0; }
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar h1 { font-size: 20px; margin: 0; }
.content { padding: 28px; max-width: 1180px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.card h2 { margin-top: 0; font-size: 16px; }

.grid { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr 1fr; } }

.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stat-card .label { color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }
.stat-card .value { font-size: 26px; font-weight: 700; margin-top: 6px; }
.stat-card .sub { color: var(--muted); font-size: 12.5px; margin-top: 4px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 13.5px; vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn.secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn.secondary:hover { background: #f9fafb; }
.btn.danger { background: #fff; color: var(--danger); border: 1px solid #fecaca; }
.btn.danger:hover { background: #fef2f2; }
.btn.sm { padding: 5px 10px; font-size: 12.5px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; font-size: 11.5px; font-weight: 600; }
.badge.gray { background: #f3f4f6; color: #4b5563; }
.badge.blue { background: #eef2ff; color: #4338ca; }
.badge.green { background: #ecfdf5; color: #047857; }
.badge.red { background: #fef2f2; color: #b91c1c; }
.badge.amber { background: #fffbeb; color: #b45309; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 13px; }
.form-group .hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=datetime-local], input[type=file], select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13.5px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid #c7d2fe; border-color: var(--primary); }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 13.5px; }
.alert.success { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.alert.error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert.info { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tabs a { padding: 9px 14px; color: var(--muted); font-weight: 600; font-size: 13px; border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--primary); border-bottom-color: var(--primary); }
.tabs a:hover { text-decoration: none; color: var(--primary); }

.toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; gap: 12px; flex-wrap: wrap; }
.toolbar .left { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.muted { color: var(--muted); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.empty-state { text-align: center; padding: 50px 20px; color: var(--muted); }

.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg); }
.login-box { background: #fff; border: 1px solid var(--border); border-radius: 12px; padding: 36px; width: 360px; }
.login-box h1 { font-size: 20px; text-align: center; margin-top: 0; }

.progress-bar { background: #eef0f4; border-radius: 999px; height: 10px; overflow: hidden; }
.progress-bar .fill { background: var(--primary); height: 100%; transition: width .3s ease; }

.ql-editor { min-height: 260px; background: #fff; font-size: 14px; }
.editor-wrap { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }

.merge-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.merge-tags button { background: #f3f4f6; border: 1px solid var(--border); border-radius: 6px; padding: 3px 8px; font-size: 12px; cursor: pointer; }
.merge-tags button:hover { background: #e5e7eb; }

.kv-list { display: grid; grid-template-columns: 200px 1fr; row-gap: 8px; font-size: 13.5px; }
.kv-list dt { color: var(--muted); }

.preview-frame { width: 100%; height: 70vh; border: 1px solid var(--border); border-radius: 8px; background: #fff; }