:root {
  --bg: #f5f7f8;
  --surface: #fff;
  --green: #5cb88a;
  --green-deep: #3f9d72;
  --green-soft: #e8f6ef;
  --text: #27332d;
  --muted: #7c8c83;
  --border: #e2efe8;
  --red: #e74c3c;
  --red-soft: #fdecea;
  --blue: #3498db;
  --blue-soft: #eaf4fd;
  --orange: #f39c12;
  --orange-soft: #fef7e8;
  --shadow: 0 2px 12px rgba(0,0,0,.06);
  --radius: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Top Bar ---------- */
.topbar {
  background: var(--surface); border-bottom: 1px solid var(--border);
  height: 56px; display: flex; align-items: center; padding: 0 24px;
  position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow);
}
.topbar .brand { font-weight: 800; font-size: 17px; color: var(--text); display: flex; align-items: center; gap: 9px; }
.topbar .brand .logo {
  width: 28px; height: 28px; border-radius: 8px; background: var(--green);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800;
}
.topbar .actions { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.topbar .user { font-size: 14px; color: var(--muted); }
.topbar .user b { color: var(--text); }
.topbar a { text-decoration: none; color: var(--green-deep); font-weight: 600; font-size: 14px; }
.topbar a:hover { text-decoration: underline; }
.topbar .btn-logout {
  background: none; border: 1px solid var(--border); color: var(--muted);
  padding: 6px 14px; border-radius: 8px; cursor: pointer; font-size: 13px; font-weight: 600;
}
.topbar .btn-logout:hover { color: var(--red); border-color: var(--red); }

/* ---------- Layout ---------- */
.layout { display: flex; min-height: calc(100vh - 56px); }
.sidebar {
  width: 200px; background: var(--surface); border-right: 1px solid var(--border);
  padding: 16px 0; flex-shrink: 0;
}
.sidebar .menu-item {
  display: flex; align-items: center; gap: 10px; padding: 12px 24px;
  font-size: 14px; font-weight: 600; color: var(--muted); cursor: pointer;
  transition: .15s; border-left: 3px solid transparent;
}
.sidebar .menu-item:hover { background: var(--green-soft); color: var(--green-deep); }
.sidebar .menu-item.active { background: var(--green-soft); color: var(--green-deep); border-left-color: var(--green); }
.sidebar .menu-item .icon { font-size: 18px; width: 24px; text-align: center; }

.main { flex: 1; padding: 24px; overflow-x: auto; }

/* ---------- Dashboard Cards ---------- */
.dash-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.dash-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 24px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px;
}
.dash-card .d-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.dash-card .d-icon.green { background: var(--green-soft); }
.dash-card .d-icon.blue { background: var(--blue-soft); }
.dash-card .d-icon.orange { background: var(--orange-soft); }
.dash-card .d-num { font-size: 28px; font-weight: 800; color: var(--text); }
.dash-card .d-label { font-size: 13px; color: var(--muted); margin-top: 2px; }

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex; align-items: center; gap: 12px; margin-bottom: 18px; flex-wrap: wrap;
}
.toolbar input[type="text"], .toolbar select {
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 14px;
  font-size: 14px; outline: none; background: var(--surface); color: var(--text);
}
.toolbar input[type="text"]:focus, .toolbar select:focus { border-color: var(--green); }
.toolbar input[type="text"] { min-width: 200px; }
.toolbar .btn {
  padding: 8px 18px; border-radius: 8px; font-size: 14px; font-weight: 600;
  cursor: pointer; border: none; transition: .15s;
}
.toolbar .btn-primary { background: var(--green); color: #fff; }
.toolbar .btn-primary:hover { background: var(--green-deep); }
.toolbar .btn-outline { background: var(--surface); border: 1px solid var(--green); color: var(--green-deep); }
.toolbar .btn-outline:hover { background: var(--green-soft); }
.toolbar .btn-danger { background: var(--red); color: #fff; }
.toolbar .btn-danger:hover { background: #c0392b; }
.toolbar .spacer { flex: 1; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; padding: 12px 16px; background: #fafdfb; color: var(--muted); font-weight: 700; font-size: 13px; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--green-soft); }
td .btn-sm {
  padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: 600;
  cursor: pointer; border: none; margin-right: 4px; transition: .15s;
}
td .btn-sm.edit { background: var(--blue-soft); color: var(--blue); }
td .btn-sm.edit:hover { background: var(--blue); color: #fff; }
td .btn-sm.del { background: var(--red-soft); color: var(--red); }
td .btn-sm.del:hover { background: var(--red); color: #fff; }
td .btn-sm.up, td .btn-sm.down { background: var(--green-soft); color: var(--green-deep); }
td .btn-sm.up:hover, td .btn-sm.down:hover { background: var(--green); color: #fff; }
td .btn-sm.revoke { background: var(--orange-soft); color: var(--orange); }
td .btn-sm.revoke:hover { background: var(--orange); color: #fff; }
td .btn-sm.activate { background: var(--green); color: #fff; }
td .btn-sm.activate:hover { background: var(--green-deep); color: #fff; }

.badge-status {
  display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
}
.badge-status.active { background: var(--green-soft); color: var(--green-deep); }
.badge-status.inactive { background: #f5f5f5; color: #999; }
.badge-status.revoked { background: var(--red-soft); color: var(--red); }
.badge-status.used { background: var(--blue-soft); color: var(--blue); }

/* ---------- Pagination ---------- */
.pagination {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  margin-top: 20px; padding: 12px 0;
}
.pagination button {
  padding: 6px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface); font-size: 13px; font-weight: 600; cursor: pointer;
  color: var(--text); transition: .15s;
}
.pagination button:hover { border-color: var(--green); color: var(--green-deep); }
.pagination button:disabled { opacity: .4; cursor: not-allowed; }
.pagination .page-info { font-size: 13px; color: var(--muted); }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(20,32,27,.55); z-index: 200;
  display: flex; align-items: center; justify-content: center; padding: 24px;
}
.modal-overlay.hidden { display: none; }
.modal-box {
  background: var(--surface); border-radius: 14px; max-width: 560px; width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,.3); overflow: hidden;
}
.modal-header {
  display: flex; align-items: center; gap: 12px; padding: 16px 20px;
  border-bottom: 1px solid var(--border); font-weight: 700; font-size: 16px;
}
.modal-header .close { margin-left: auto; background: none; border: none; font-size: 22px; color: var(--muted); cursor: pointer; }
.modal-body { padding: 20px; max-height: 70vh; overflow-y: auto; }
.modal-body .form-group { margin-bottom: 14px; }
.modal-body label { display: block; font-size: 13px; font-weight: 700; color: var(--muted); margin-bottom: 5px; }
.modal-body input[type="text"],
.modal-body input[type="number"],
.modal-body input[type="password"],
.modal-body select,
.modal-body textarea {
  width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: 9px 12px;
  font-size: 14px; outline: none; background: var(--surface); color: var(--text);
  font-family: inherit;
}
.modal-body textarea { resize: vertical; min-height: 70px; }
.modal-body input:focus, .modal-body select:focus, .modal-body textarea:focus { border-color: var(--green); }
.modal-body .checkbox-group { display: flex; align-items: center; gap: 8px; }
.modal-body .checkbox-group input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--green); }
.modal-footer {
  display: flex; justify-content: flex-end; gap: 10px; padding: 14px 20px;
  border-top: 1px solid var(--border);
}
.modal-footer .btn {
  padding: 8px 22px; border-radius: 8px; font-size: 14px; font-weight: 600;
  cursor: pointer; border: none; transition: .15s;
}
.modal-footer .btn-cancel { background: #f0f0f0; color: var(--muted); }
.modal-footer .btn-cancel:hover { background: #e0e0e0; }
.modal-footer .btn-confirm { background: var(--green); color: #fff; }
.modal-footer .btn-confirm:hover { background: var(--green-deep); }
.modal-footer .btn-danger { background: var(--red); color: #fff; }
.modal-footer .btn-danger:hover { background: #c0392b; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; top: 24px; right: 24px; z-index: 300;
  padding: 12px 24px; border-radius: 10px; font-size: 14px; font-weight: 600;
  color: #fff; box-shadow: 0 8px 24px rgba(0,0,0,.2);
  animation: slideIn .25s ease;
}
.toast.success { background: var(--green); }
.toast.error { background: var(--red); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ---------- Code List (激活码生成结果) ---------- */
.code-list {
  background: #f8faf9; border: 1px solid var(--border); border-radius: 8px;
  padding: 12px; max-height: 300px; overflow-y: auto; font-family: monospace;
  font-size: 13px; line-height: 1.8; margin-top: 10px;
}

/* ---------- Reveal ---------- */
.reveal-wrap { display: flex; align-items: center; gap: 10px; }
.reveal-wrap .revealed { font-family: monospace; word-break: break-all; }

/* ---------- 文件上传区域 ---------- */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 28px 20px;
  text-align: center;
  cursor: pointer;
  transition: .2s;
  background: #fafdfb;
}
.upload-zone:hover, .upload-zone.drag-over {
  border-color: var(--green);
  background: var(--green-soft);
}
.upload-zone.hidden { display: none; }
.upload-zone .upload-placeholder {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--muted); font-size: 14px;
}
.upload-zone .upload-icon { font-size: 32px; }
.upload-zone .upload-hint { font-size: 12px; color: #aaa; }
.upload-zone b { color: var(--green-deep); }

/* 上传进度条 */
.upload-progress { margin-top: 10px; }
.upload-progress.hidden { display: none; }
.upload-progress .file-name {
  font-size: 13px; color: var(--text); margin-bottom: 6px; word-break: break-all;
}
.upload-progress .progress-bar {
  height: 6px; background: #e0e0e0; border-radius: 3px; overflow: hidden;
}
.upload-progress .progress-fill {
  height: 100%; background: var(--green); border-radius: 3px; transition: width .3s;
  width: 0%;
}
.upload-progress .progress-text {
  font-size: 12px; color: var(--muted); margin-top: 4px; display: block;
}
.upload-progress.success .progress-fill { background: var(--green-deep); }
.upload-progress.error .progress-fill { background: var(--red); }

/* 封面预览 */
.cover-preview {
  margin-top: 10px; max-width: 200px; border-radius: 8px;
  border: 1px solid var(--border);
}
.cover-preview.hidden { display: none; }

/* 编辑模式：已上传文件信息 */
.file-info {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px;
  background: var(--green-soft); border-radius: 8px; font-size: 13px;
  margin-top: 8px;
}
.file-info.hidden { display: none; }
.file-info .btn-replace {
  margin-left: auto; padding: 4px 12px; border-radius: 6px;
  border: 1px solid var(--green); background: #fff; color: var(--green-deep);
  font-size: 12px; font-weight: 600; cursor: pointer;
}
.file-info .btn-replace:hover { background: var(--green); color: #fff; }

@media (max-width: 768px) {
  .dash-grid { grid-template-columns: 1fr; }
  .sidebar { width: 60px; }
  .sidebar .menu-item { padding: 12px 16px; justify-content: center; }
  .sidebar .menu-item span:not(.icon) { display: none; }
  .main { padding: 16px; }
}

@media (max-width: 640px) {
  .topbar { padding: 0 12px; gap: 8px; }
  .topbar .actions { gap: 8px; }
  .topbar .user { display: none; }
  .topbar a, .topbar .btn-logout { font-size: 13px; padding: 6px 10px; white-space: nowrap; }
  .main { padding: 12px; }
  .modal-overlay { padding: 12px; }
}