:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --text: #1d2129;
  --muted: #6b7280;
  --accent: #1677ff;
  --line: #e5e6eb;
  --input: #ffffff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 24px;
}
header h1 { margin: 0 0 4px; font-size: 28px; letter-spacing: 0.02em; }
header p { margin: 0 0 16px; color: var(--muted); }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 16px;
}
.panel h2, .panel h3 { margin-top: 0; }
form {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px 16px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}
input, select, button {
  font: inherit;
  height: 36px;
  padding: 0 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--input);
  color: var(--text);
}
button {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}
.tabs button {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line);
}
.tabs button.active {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}
.row { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border-bottom: 1px solid var(--line); padding: 8px 6px; text-align: left; vertical-align: middle; }
tr:hover td { background: #f7f9fc; }
.toast {
  position: fixed; right: 16px; bottom: 16px;
  background: #fff; color: var(--text); border: 1px solid var(--accent);
  padding: 10px 14px; border-radius: 8px;
}
.muted { color: var(--muted); font-size: 12px; }
.linkish {
  color: var(--accent); cursor: pointer; background: none; border: none;
  padding: 0; height: auto; font-weight: 500;
}
button.danger {
  background: #fff;
  color: #cf1322;
  border: 1px solid #ffa39e;
  margin-left: 6px;
}
img.cover {
  width: 48px;
  height: 72px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
  vertical-align: middle;
}
td a { color: var(--accent); }
h2 button, h3 button { margin-left: 8px; vertical-align: middle; }