* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #0c0c1e 0%, #1a1a2e 50%, #16213e 100%);
  color: #e0e0e0;
  min-height: 100vh;
}

a {
  color: #e74c3c;
  text-decoration: none;
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 2.5rem 1rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

header p {
  color: #888;
  font-size: 1rem;
}

.card {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.field-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.input-row {
  display: flex;
  gap: 0.5rem;
}

.input-row input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}

.input-row input:focus {
  border-color: #e74c3c;
}

.input-row input::placeholder {
  color: #555;
}

.input-row button {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 10px;
  background: #e74c3c;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s, opacity 0.2s;
}

.input-row button:hover {
  background: #c0392b;
}

.input-row button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.hint {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: #666;
  line-height: 1.6;
}

.hint code {
  background: rgba(255, 255, 255, 0.06);
  padding: 0.125rem 0.4rem;
  border-radius: 4px;
  font-size: 0.8rem;
  color: #999;
}

.loading {
  text-align: center;
  padding: 3rem 1rem;
}

.loading p {
  color: #888;
  margin-top: 1rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(231, 76, 60, 0.2);
  border-top-color: #e74c3c;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
}

.result-header h2 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  background: rgba(231, 76, 60, 0.15);
  color: #e74c3c;
  font-size: 0.8rem;
  font-weight: 600;
}

.download-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.2s, border-color 0.2s;
  line-height: 1.4;
  text-align: center;
}

.btn-primary {
  background: #e74c3c;
  color: #fff;
}

.btn-primary:hover {
  background: #c0392b;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #ccc;
  border-color: rgba(255, 255, 255, 0.12);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: #777;
  border-color: rgba(255, 255, 255, 0.12);
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.3);
  color: #bbb;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  padding: 0.75rem 0.5rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

tbody td {
  padding: 0.625rem 0.5rem;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.col-num {
  width: 3rem;
  text-align: center;
  color: #555;
}

.col-name {
  min-width: 160px;
  max-width: 260px;
}

.col-artist {
  min-width: 120px;
  max-width: 200px;
  color: #aaa;
}

.col-album {
  min-width: 120px;
  max-width: 200px;
  color: #888;
}

.col-duration {
  width: 5rem;
  text-align: right;
  color: #666;
}

.hint-bottom {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: #555;
  text-align: center;
  font-style: italic;
}

.error {
  background: rgba(231, 76, 60, 0.1);
  border-color: rgba(231, 76, 60, 0.25);
  color: #e74c3c;
  padding: 1rem 1.25rem;
  border-radius: 10px;
  font-size: 0.9rem;
}

footer {
  text-align: center;
  margin-top: 2.5rem;
  color: #444;
  font-size: 0.8rem;
}