:root {
  --bg-primary: #0F172A;
  --bg-sidebar: #1E293B;
  --bg-card: #FFFFFF;
  --bg-body: #F8FAFC;
  --border-color: #E2E8F0;
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-light: #EFF6FF;
  --success: #10B981;
  --success-bg: #ECFDF5;
  --warning: #F59E0B;
  --warning-bg: #FFFBEB;
  --danger: #EF4444;
  --danger-bg: #FEF2F2;
  --purple: #8B5CF6;
  --radius: 8px;
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: var(--bg-body); color: var(--text-primary); display: flex; height: 100vh; overflow: hidden; }

/* Sidebar */
.sidebar { width: 260px; background: var(--bg-primary); color: #F8FAFC; display: flex; flex-direction: column; flex-shrink: 0; }
.sidebar-brand { padding: 20px 24px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.sidebar-brand svg { width: 28px; height: 28px; fill: #38BDF8; }
.sidebar-brand-title { font-size: 15px; font-weight: 700; letter-spacing: 0.5px; }
.sidebar-brand-sub { font-size: 11px; color: #94A3B8; }
.sidebar-menu { list-style: none; padding: 16px 12px; flex: 1; overflow-y: auto; }
.sidebar-item { margin-bottom: 4px; }
.sidebar-link { display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-radius: var(--radius); color: #94A3B8; text-decoration: none; font-size: 13.5px; font-weight: 500; transition: all 0.15s ease; cursor: pointer; }
.sidebar-link:hover { color: #FFFFFF; background: rgba(255,255,255,0.06); }
.sidebar-link.active { color: #FFFFFF; background: var(--primary); font-weight: 600; }
.sidebar-link svg { width: 18px; height: 18px; flex-shrink: 0; fill: currentColor; }

/* App Content Area */
.app-container { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar { height: 60px; background: var(--bg-card); border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; flex-shrink: 0; }
.topbar-title { font-size: 17px; font-weight: 700; color: var(--text-primary); }
.topbar-right { display: flex; align-items: center; gap: 16px; }
.env-badge { background: #DCFCE7; color: #15803D; font-size: 11px; font-weight: 700; padding: 4px 8px; border-radius: 4px; text-transform: uppercase; }
.user-badge { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; color: var(--text-secondary); }

.content-wrapper { flex: 1; padding: 24px; overflow-y: auto; }

/* Cards & Grid */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--bg-card); border-radius: var(--radius); padding: 20px; border: 1px solid var(--border-color); box-shadow: var(--shadow); position: relative; overflow: hidden; }
.stat-card::before { content: ""; position: absolute; top: 0; left: 0; width: 4px; height: 100%; background: var(--primary); }
.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before { background: var(--danger); }
.stat-label { font-size: 12px; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-value { font-size: 28px; font-weight: 800; color: var(--text-primary); margin-top: 6px; }

/* Panel / Table Card */
.panel { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border-color); box-shadow: var(--shadow); margin-bottom: 24px; overflow: hidden; }
.panel-header { padding: 16px 20px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.panel-title { font-size: 15px; font-weight: 700; }
.panel-actions { display: flex; align-items: center; gap: 10px; }

/* Form Controls & Buttons */
.input-search { padding: 8px 12px; border: 1px solid var(--border-color); border-radius: var(--radius); font-size: 13px; outline: none; width: 240px; }
.input-search:focus { border-color: var(--primary); }
.btn { padding: 8px 14px; border-radius: var(--radius); font-size: 13px; font-weight: 600; cursor: pointer; border: none; display: inline-flex; align-items: center; gap: 6px; transition: all 0.15s ease; }
.btn-primary { background: var(--primary); color: #FFF; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { background: #FFF; border: 1px solid var(--border-color); color: var(--text-primary); }
.btn-outline:hover { background: var(--bg-body); }
.btn-danger { background: var(--danger); color: #FFF; }
.btn-danger:hover { opacity: 0.9; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* Data Tables */
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { background: #F8FAFC; text-align: left; padding: 12px 16px; font-weight: 600; color: var(--text-secondary); border-bottom: 1px solid var(--border-color); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.5px; }
td { padding: 12px 16px; border-bottom: 1px solid var(--border-color); color: var(--text-primary); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #F8FAFC; }

/* Badges */
.badge { display: inline-flex; align-items: center; padding: 3px 8px; border-radius: 4px; font-size: 11px; font-weight: 700; text-transform: uppercase; }
.badge-active { background: var(--success-bg); color: var(--success); }
.badge-expired { background: var(--danger-bg); color: var(--danger); }
.badge-revoked { background: #FEE2E2; color: #991B1B; }
.badge-plan { background: var(--primary-light); color: var(--primary); }
.badge-trial { background: var(--warning-bg); color: var(--warning); }

/* Modals */
.modal-backdrop { position: fixed; inset: 0; background: rgba(15, 23, 42, 0.6); display: none; align-items: center; justify-content: center; z-index: 1000; padding: 20px; }
.modal-backdrop.open { display: flex; }
.modal { background: var(--bg-card); border-radius: var(--radius); width: 100%; max-width: 520px; box-shadow: var(--shadow-lg); overflow: hidden; animation: modalIn 0.15s ease-out; }
@keyframes modalIn { from { transform: scale(0.95); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-header { padding: 16px 20px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; justify-content: space-between; }
.modal-title { font-size: 16px; font-weight: 700; }
.modal-close { background: none; border: none; font-size: 20px; color: var(--text-secondary); cursor: pointer; }
.modal-body { padding: 20px; }
.modal-footer { padding: 14px 20px; border-top: 1px solid var(--border-color); display: flex; justify-content: flex-end; gap: 10px; background: #F8FAFC; }

.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12.5px; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.form-control { width: 100%; padding: 8px 12px; border: 1px solid var(--border-color); border-radius: var(--radius); font-size: 13.5px; outline: none; }
.form-control:focus { border-color: var(--primary); }

/* Toast */
.toast-container { position: fixed; bottom: 20px; right: 20px; z-index: 2000; display: flex; flex-direction: column; gap: 10px; }
.toast { background: var(--bg-primary); color: #FFF; padding: 12px 18px; border-radius: var(--radius); font-size: 13px; font-weight: 500; box-shadow: var(--shadow-lg); animation: slideIn 0.2s ease-out; }
@keyframes slideIn { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }