/* ========== 商户后台 - 深色 SaaS 风 ========== */
:root {
  --bg: #0f1117;
  --sidebar-bg: #161822;
  --card-bg: #1a1d2e;
  --border: rgba(99,102,241,0.15);
  --text: #e2e8f0;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --success: #22c55e;
  --danger: #ef4444;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', sans-serif; background: var(--bg); color: var(--text); }

/* Layout */
.admin-layout { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--sidebar-bg); border-right: 1px solid var(--border); flex-shrink: 0; }
.sidebar-logo { padding: 20px; font-size: 18px; font-weight: 700; border-bottom: 1px solid var(--border); }
.sidebar-menu { padding: 12px 0; }
.menu-item { display: flex; align-items: center; gap: 10px; padding: 12px 20px; color: var(--text-muted); text-decoration: none; font-size: 14px; transition: all 0.2s; }
.menu-item:hover, .menu-item.active { color: var(--accent-hover); background: rgba(99,102,241,0.08); border-right: 3px solid var(--accent); }

.main-area { flex: 1; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; background: var(--sidebar-bg); border-bottom: 1px solid var(--border); }
.topbar h2 { font-size: 18px; }
.topbar-right { display: flex; align-items: center; gap: 16px; font-size: 14px; color: var(--text-muted); }
.content { padding: 24px; flex: 1; }

/* Cards & Panel */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.stat-label { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--accent-hover); }

.panel { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 24px; }
.panel-header { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 12px; }
.panel-header h3 { font-size: 16px; }
.panel-body { padding: 20px; }
.quick-actions { display: flex; gap: 12px; }

/* Table */
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th { text-align: left; padding: 12px; color: var(--text-muted); border-bottom: 1px solid var(--border); font-weight: 500; }
.data-table td { padding: 12px; border-bottom: 1px solid rgba(255,255,255,0.03); }
.tag { padding: 2px 8px; border-radius: 4px; font-size: 12px; }
.tag-success { background: rgba(34,197,94,0.15); color: var(--success); }
.tag-danger { background: rgba(239,68,68,0.15); color: var(--danger); }

/* Form */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.form-group input, .form-group select { width: 100%; padding: 10px 14px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); font-size: 14px; outline: none; }
.form-group input:focus { border-color: var(--accent); }
.search-input { width: 240px; padding: 8px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }
.filter-bar { gap: 8px; }
.filter-bar select, .filter-bar input { padding: 8px 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; color: var(--text); }
.recharge-form { max-width: 400px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; padding: 8px 20px; border-radius: 8px; font-size: 14px; cursor: pointer; border: none; transition: all 0.2s; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent-hover); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-block { width: 100%; justify-content: center; padding: 12px; }

/* Login */
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-bg { position: fixed; inset: 0; background: radial-gradient(ellipse at center, rgba(99,102,241,0.1), transparent 70%); }
.login-box { position: relative; width: 400px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 16px; padding: 40px; }
.login-header { text-align: center; margin-bottom: 32px; }
.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 16px;
}
.login-logo .logo-img {
  height: 44px;
  width: auto;
  max-width: 52px;
  object-fit: contain;
  flex-shrink: 0;
}
.login-logo .logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-hover);
  white-space: nowrap;
}
.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-logo .logo-img {
  height: 32px;
  width: auto;
  max-width: 40px;
  object-fit: contain;
  flex-shrink: 0;
}
.sidebar-logo .logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent-hover);
}
.login-header h1 { font-size: 24px; margin: 8px 0 4px; }
.login-header p { color: var(--text-muted); font-size: 14px; }
.captcha-row { display: flex; gap: 12px; align-items: flex-end; }
.captcha-input-wrap { flex: 1; min-width: 0; }
.captcha-img {
  width: 120px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  flex-shrink: 0;
  object-fit: cover;
  background: var(--bg);
  transition: opacity 0.2s;
}
.captcha-img:hover { border-color: var(--accent); }
.login-footer { text-align: center; margin-top: 16px; font-size: 13px; }
.login-footer a { color: var(--accent-hover); text-decoration: none; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; }
.modal.hidden { display: none; }
.modal-box { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 24px; width: 420px; }
.modal-box h3 { margin-bottom: 20px; }
.modal-box.modal-lg { width: 520px; max-width: 95vw; }
.modal-sub { color: var(--text-muted); font-size: 13px; margin-bottom: 16px; }
.table-wrap { overflow-x: auto; }
.product-pick-list {
  max-height: 200px;
  overflow-y: auto;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.product-pick-item {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  font-size: 13px;
}
.product-pick-item:last-child { border-bottom: none; }
.product-pick-item:hover { background: rgba(99,102,241,0.08); }
.product-pick-item.active {
  background: rgba(99,102,241,0.15);
  border-left: 3px solid var(--accent);
}
.product-pick-item span { display: block; color: var(--text-muted); font-size: 12px; margin-top: 4px; }
.cost-preview { font-size: 14px; color: var(--accent-hover); margin-bottom: 16px; }
.text-muted { color: var(--text-muted); font-size: 13px; }
.form-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 20px; }

@media (max-width: 768px) {
  .sidebar { display: none; }
}