:root {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --line: #e2e7f0;
  --text: #1e2433;
  --muted: #6b7689;
  --accent: #4f6bed;
  --accent-dark: #3c54c9;
  --danger: #d94848;
  --warn-bg: #fff8e6;
  --warn-line: #f0d38a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.6;
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 28px;
  height: 56px;
  background: #1d2440;
  color: #fff;
}
.topbar .brand { color: #fff; font-weight: 600; letter-spacing: .5px; }
.topbar nav { display: flex; align-items: center; gap: 18px; }
.topbar nav a { color: #cfd6ea; }
.topbar nav a:hover { color: #fff; text-decoration: none; }

main { max-width: 1080px; margin: 0 auto; padding: 24px 20px 60px; }

h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 0 0 12px; }

.muted { color: var(--muted); font-size: 13px; }
.mono { font-family: Consolas, "Courier New", monospace; }
.hint { color: var(--muted); font-size: 13px; margin: 10px 0 18px; }
.right { text-align: right; }
.inline { display: inline; }

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.head-actions { display: flex; gap: 10px; align-items: center; }

.search { display: flex; gap: 8px; }
.search input { width: 240px; }

input, select, textarea, button {
  font: inherit;
  color: inherit;
}
input[type="text"], input[type="password"], input:not([type]), select, textarea {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }

button, .btn {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  cursor: pointer;
  white-space: nowrap;
}
button:hover, .btn:hover { border-color: #c6cfe1; text-decoration: none; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-dark); }
button.danger { color: var(--danger); border-color: #f0c9c9; }
button.link {
  border: none;
  background: none;
  padding: 0;
  color: var(--accent);
}
button.link.danger { color: var(--danger); }
button.link:hover { text-decoration: underline; }
.btn { display: inline-block; }

.new-song {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
  padding: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  flex-wrap: wrap;
}
.new-song input { flex: 1 1 200px; }

table.list {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
table.list th, table.list td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}
table.list thead th {
  background: #f8faff;
  font-weight: 600;
  font-size: 13px;
  color: #44506a;
}
table.list tbody tr:last-child td { border-bottom: none; }
table.list tbody tr:hover { background: #fafbff; }
td.empty, .empty { color: var(--muted); text-align: center; padding: 22px; }

.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  background: #eef2ff;
  color: #4658b8;
  font-size: 12px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px;
  margin-bottom: 18px;
}
.card table.list { border: none; }
.card table.list th:first-child, .card table.list td:first-child { padding-left: 0; }
.card table.list th:last-child, .card table.list td:last-child { padding-right: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.grid label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: #44506a; }
.grid .wide { grid-column: 1 / -1; }
.form-actions { display: flex; align-items: center; gap: 12px; }

.upload {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  flex-wrap: wrap;
}

.pending {
  border: 1px solid var(--warn-line);
  background: var(--warn-bg);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 18px;
}
.pending-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.pending ul { margin: 10px 0; padding-left: 18px; }
.pending li { display: flex; justify-content: space-between; gap: 12px; padding: 3px 0; }
.pending-actions { display: flex; gap: 10px; }

.flash {
  max-width: 1080px;
  margin: 16px auto 0;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
}
.flash.ok { background: #e9f7ee; border: 1px solid #b9e3c8; color: #1f6b3d; }
.flash.err { background: #fdecec; border: 1px solid #f2c4c4; color: #a32a2a; }

.auth {
  max-width: 420px;
  margin: 10vh auto 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(29, 36, 64, .06);
}
.auth h1 { margin-bottom: 6px; }
.auth form { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.auth label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: #44506a; }
.auth .wide { width: 100%; }

.captcha-row { display: flex; gap: 10px; align-items: center; }
.captcha-row input { flex: 1; }
.captcha-row img {
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 7px;
  cursor: pointer;
}

@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; }
  .topbar { padding: 0 14px; }
  .topbar nav { gap: 12px; font-size: 13px; }
  main { padding: 18px 14px 50px; }
  table.list { display: block; overflow-x: auto; }
}