:root {
  --bg: #0a0f1e;
  --bg2: #0e1426;
  --glass: rgba(255, 255, 255, 0.06);
  --glass-strong: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.24);
  --text: #e8ecf5;
  --text-muted: #8a93a8;
  --text-dim: #646b80;
  --accent: #5ad1c4;
  --accent2: #8b7ff0;
  --accent3: #f06aad;
  --danger: #f06a6a;
  --ok: #5ad17a;
  --warn: #f0b35a;
  --radius: 16px;
  --radius-sm: 10px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  min-height: 100vh;
  background: var(--bg);
  background-image:
    radial-gradient(900px 620px at 10% -8%, rgba(91, 209, 196, 0.2), transparent 60%),
    radial-gradient(820px 600px at 96% 8%, rgba(139, 127, 240, 0.2), transparent 60%),
    radial-gradient(700px 520px at 50% 112%, rgba(240, 106, 173, 0.14), transparent 60%);
  background-attachment: fixed;
  font-size: 14px;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { opacity: 0.82; }

.glass {
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* ===== 前台壳 ===== */
.front-wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 64px 20px 80px;
}
.brand {
  text-align: center;
  margin-bottom: 28px;
}
.brand .logo {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.5px;
  background: linear-gradient(92deg, var(--accent), var(--accent2) 60%, var(--accent3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand .sub {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 6px;
}

.card {
  padding: 28px 26px;
}
.card h2 {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 600;
}
.card .desc {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 20px;
}

/* tabs */
.tabs {
  display: flex;
  gap: 6px;
  padding: 4px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 22px;
}
.tabs button {
  flex: 1;
  padding: 9px;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  border-radius: 8px;
  transition: 0.18s;
}
.tabs button.active {
  background: var(--glass-strong);
  color: var(--text);
}

/* form */
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 7px;
}
.field .hint { color: var(--text-dim); font-size: 11px; margin-top: 6px; }

.input-wrap {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.18);
  overflow: hidden;
  transition: 0.18s;
}
.input-wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(90, 209, 196, 0.14);
}
.input-wrap input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--text);
  padding: 11px 13px;
  font-size: 14px;
  min-width: 0;
}
.input-wrap input::placeholder { color: var(--text-dim); }
.input-wrap .suffix {
  display: flex;
  align-items: center;
  padding: 0 13px;
  color: var(--text-muted);
  font-size: 13px;
  background: rgba(255, 255, 255, 0.03);
  border-left: 1px solid var(--border);
  white-space: nowrap;
}

input[type="text"], input[type="email"], input[type="password"], input[type="tel"], textarea, select {
  width: 100%;
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 11px 13px;
  font-size: 14px;
  outline: 0;
  transition: 0.18s;
  font-family: inherit;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(90, 209, 196, 0.14);
}
textarea { resize: vertical; min-height: 70px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 11px 18px;
  border: 0;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: 0.18s;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(92deg, var(--accent), var(--accent2));
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn.block { width: 100%; }
.btn.ghost {
  background: var(--glass);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn.ghost:hover { background: var(--glass-strong); }
.btn.danger { background: linear-gradient(92deg, #f06a6a, #f06aad); }
.btn.sm { padding: 6px 12px; font-size: 12px; }

.foot-link {
  text-align: center;
  margin-top: 20px;
  color: var(--text-muted);
  font-size: 13px;
}

.result-box {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
  font-size: 13px;
  display: none;
}
.result-box.show { display: block; }
.result-box.ok { border-color: rgba(90, 209, 122, 0.4); }
.result-box.err { border-color: rgba(240, 106, 106, 0.4); }
.result-box.warn { border-color: rgba(240, 179, 90, 0.4); }

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
}
.badge.pending { background: rgba(240, 179, 90, 0.18); color: var(--warn); }
.badge.approved, .badge.active { background: rgba(90, 209, 122, 0.18); color: var(--ok); }
.badge.rejected, .badge.disabled { background: rgba(240, 106, 106, 0.18); color: var(--danger); }

/* ===== toast ===== */
#toast-box {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  padding: 11px 18px;
  border-radius: 10px;
  background: rgba(14, 20, 38, 0.92);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-size: 13px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  transition: 0.28s;
}
.toast.ok { border-color: rgba(90, 209, 122, 0.5); }
.toast.err { border-color: rgba(240, 106, 106, 0.5); }
.toast.out { opacity: 0; transform: translateY(-10px); }

/* ===== 后台 ===== */
.admin-shell { display: none; min-height: 100vh; }
.admin-shell.show { display: block; }

.admin-topbar {
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 22px;
  background: rgba(10, 15, 30, 0.7);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.admin-topbar .title {
  font-weight: 600;
  font-size: 15px;
  background: linear-gradient(92deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.admin-topbar .spacer { flex: 1; }
.admin-topbar .who { color: var(--text-muted); font-size: 12px; margin-right: 14px; }

.admin-body { display: flex; }

.admin-side {
  width: 200px;
  flex-shrink: 0;
  padding: 18px 12px;
  border-right: 1px solid var(--border);
  min-height: calc(100vh - 56px);
  background: rgba(10, 15, 30, 0.4);
}
.admin-side a {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 4px;
  cursor: pointer;
  transition: 0.16s;
}
.admin-side a:hover { background: var(--glass); color: var(--text); }
.admin-side a.active {
  background: var(--glass-strong);
  color: var(--accent);
  border: 1px solid var(--border);
}

.admin-main {
  flex: 1;
  padding: 26px 30px;
  min-width: 0;
}
.admin-main h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 4px;
}
.admin-main .page-desc {
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 20px;
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.toolbar .grow { flex: 1; }
.toolbar select, .toolbar input { width: auto; min-width: 130px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
table th, table td {
  text-align: left;
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
}
table th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 12px;
}
table tr:hover td { background: rgba(255, 255, 255, 0.03); }
.cell-mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 12px; }
.cell-muted { color: var(--text-muted); }
.ops { display: flex; gap: 6px; flex-wrap: wrap; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}
.stat-card {
  padding: 18px 18px;
}
.stat-card .num {
  font-size: 28px;
  font-weight: 600;
  background: linear-gradient(92deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-card .label {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 4px;
}

.pager {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-end;
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 12px;
}

.pwd-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}
.pwd-modal.show { display: flex; }
.pwd-modal .inner {
  width: 420px;
  max-width: 90vw;
  padding: 24px;
}
.pwd-modal h3 { margin: 0 0 6px; font-size: 16px; }
.pwd-modal .code {
  font-family: ui-monospace, Menlo, monospace;
  font-size: 20px;
  letter-spacing: 2px;
  text-align: center;
  padding: 14px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  margin: 14px 0;
  color: var(--accent);
}
.pwd-modal .muted { color: var(--text-muted); font-size: 12px; }

/* 登录页 */
.login-center {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-center .card { width: 400px; max-width: 100%; }

@media (max-width: 720px) {
  .admin-side { width: 150px; }
  .admin-main { padding: 18px; }
  table { font-size: 12px; }
}