:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --border: #e1e5eb;
  --text: #1f2733;
  --muted: #6b7785;
  --primary: #2f5496;
  --primary-hover: #25406f;
  --accent: #eef2f8;
  --danger: #c0392b;
  --ok: #1e8449;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.06);
}

* { 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;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 20px;
  height: 56px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
}
.logo { color: var(--primary); font-size: 20px; }

.tabs { display: flex; gap: 4px; }
.tab {
  border: none;
  background: transparent;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  border-radius: var(--radius);
}
.tab:hover { background: var(--accent); color: var(--text); }
.tab.active { background: var(--primary); color: #fff; }

main { padding: 20px; max-width: 1400px; margin: 0 auto; }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.spacer { flex: 1; }

.inline { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-weight: 600; }

.search {
  flex: 1;
  min-width: 220px;
  max-width: 420px;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--panel);
}
.search:focus, .select:focus { outline: 2px solid rgba(47, 84, 150, 0.25); border-color: var(--primary); }

.select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  font-size: 14px;
  color: var(--text);
}
.select.wide { min-width: 240px; }

.btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--accent); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-hover); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.columns-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.columns-panel.hidden { display: none; }
.columns-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px 18px;
  margin: 10px 0;
}
.columns-grid label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 2px 0;
}
.columns-actions { display: flex; gap: 8px; }
.link-btn {
  background: none; border: none; color: var(--primary);
  cursor: pointer; font-weight: 600; padding: 2px 4px; font-size: 13px;
}
.link-btn:hover { text-decoration: underline; }

.status-row { margin-bottom: 8px; }
.muted { color: var(--muted); }

.table-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
  max-height: 65vh;
  box-shadow: var(--shadow);
}
table { border-collapse: collapse; width: 100%; }
thead th {
  position: sticky;
  top: 0;
  background: var(--accent);
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  z-index: 1;
}
tbody td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
}
tbody tr:hover { background: #f8fafc; }
tbody tr:last-child td { border-bottom: none; }
.empty-row td { text-align: center; color: var(--muted); padding: 28px; white-space: normal; }

.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 14px;
}

.upload-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 10px;
  box-shadow: var(--shadow);
}
.upload-left { display: flex; flex-direction: column; gap: 2px; }
.upload-form { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.upload-msg { min-height: 20px; margin-bottom: 8px; font-weight: 600; }
.upload-msg.ok { color: var(--ok); }
.upload-msg.err { color: var(--danger); }

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
  z-index: 50;
  font-weight: 600;
}
.toast.hidden { display: none; }
.toast.err { background: var(--danger); }
.toast.ok { background: var(--ok); }