:root {
  --bg: #0f1117;
  --bg-card: #1a1d2e;
  --bg-dark: #13151f;
  --border: #2d3148;
  --accent: #4f8ef7;
  --text-primary: #e2e8f0;
  --text-muted: #64748b;
  --sidebar-w: 220px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: var(--bg); color: var(--text-primary); font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar { width: var(--sidebar-w); background: var(--bg-card); border-right: 1px solid var(--border); display: flex; flex-direction: column; position: fixed; top: 0; left: 0; height: 100vh; z-index: 100; transition: transform 0.2s; }
.sidebar.collapsed { transform: translateX(calc(-1 * var(--sidebar-w))); }
.sidebar-brand { padding: 20px 16px; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 1rem; color: var(--accent); }
.sidebar-nav { flex: 1; padding: 12px 8px; overflow-y: auto; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px; color: var(--text-muted); text-decoration: none; font-size: 0.85rem; font-weight: 500; margin-bottom: 2px; cursor: pointer; transition: background 0.15s, color 0.15s; }
.nav-item:hover { background: rgba(79,142,247,0.08); color: var(--text-primary); }
.nav-item.active { background: rgba(79,142,247,0.15); color: var(--accent); }
.nav-item i { font-size: 1rem; width: 18px; text-align: center; }
.nav-divider { height: 1px; background: var(--border); margin: 8px 4px; }
.sidebar-footer { padding: 12px 8px; border-top: 1px solid var(--border); }

/* Topbar */
.topbar { position: fixed; top: 0; left: var(--sidebar-w); right: 0; height: 56px; background: var(--bg-card); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; padding: 0 24px; z-index: 99; transition: left 0.2s; }
.topbar.expanded { left: 0; }
.topbar-title { font-weight: 700; font-size: 1rem; color: var(--text-primary); display: flex; align-items: center; gap: 8px; }
.topbar-right { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; color: var(--text-muted); }
.btn-toggle { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.2rem; padding: 4px; }
.btn-toggle:hover { color: var(--text-primary); }

/* Main content */
.main-content { margin-left: var(--sidebar-w); margin-top: 56px; flex: 1; padding: 24px; transition: margin-left 0.2s; min-height: calc(100vh - 56px); }
.main-content.expanded { margin-left: 0; }

/* Cards */
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.card-title { font-size: 0.8rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }

/* Table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
thead tr { border-bottom: 1px solid var(--border); }
th { padding: 10px 12px; color: var(--text-muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; text-align: left; }
td { padding: 12px 12px; border-bottom: 1px solid rgba(45,49,72,0.5); color: var(--text-primary); vertical-align: middle; }
tr:hover td { background: rgba(79,142,247,0.03); }

/* Badges */
.badge { padding: 3px 10px; border-radius: 999px; font-size: 0.72rem; font-weight: 600; }
.badge-active { background: rgba(34,197,94,0.15); color: #22c55e; border: 1px solid rgba(34,197,94,0.3); }
.badge-unused { background: rgba(79,142,247,0.15); color: #4f8ef7; border: 1px solid rgba(79,142,247,0.3); }
.badge-revoked { background: rgba(239,68,68,0.15); color: #f87171; border: 1px solid rgba(239,68,68,0.3); }
.badge-expired { background: rgba(100,116,139,0.15); color: #64748b; border: 1px solid rgba(100,116,139,0.3); }

/* Buttons */
.btn { padding: 8px 16px; border-radius: 8px; font-size: 0.82rem; font-weight: 600; cursor: pointer; border: none; display: inline-flex; align-items: center; gap: 6px; transition: opacity 0.15s; }
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--accent); color: white; }
.btn-danger { background: rgba(239,68,68,0.15); border: 1px solid rgba(239,68,68,0.3); color: #f87171; }
.btn-warning { background: rgba(245,158,11,0.15); border: 1px solid rgba(245,158,11,0.3); color: #f59e0b; }
.btn-secondary { background: rgba(100,116,139,0.15); border: 1px solid var(--border); color: var(--text-muted); }
.btn-sm { padding: 5px 10px; font-size: 0.75rem; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 6px; }
.form-control { width: 100%; background: var(--bg-dark); border: 1px solid var(--border); color: var(--text-primary); border-radius: 8px; padding: 9px 12px; font-size: 0.85rem; outline: none; transition: border-color 0.15s; }
.form-control:focus { border-color: var(--accent); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 0.85rem; margin-bottom: 16px; display: none; }
.alert.show { display: flex; align-items: center; gap: 8px; }
.alert-success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: #22c55e; }
.alert-error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: #f87171; }

/* Modal */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 999; align-items: center; justify-content: center; }
.modal-overlay.open { display: flex; }
.modal-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 24px; min-width: 460px; max-width: 90vw; max-height: 85vh; overflow-y: auto; }
.modal-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 20px; display: flex; justify-content: space-between; align-items: center; }
.modal-close { cursor: pointer; color: var(--text-muted); font-size: 1.2rem; background: none; border: none; }
.modal-close:hover { color: var(--text-primary); }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }

/* Login */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg); width: 100%; }
.login-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 40px 36px; width: 100%; max-width: 400px; }
.login-logo { text-align: center; margin-bottom: 28px; }
.login-logo i { font-size: 2.5rem; color: var(--accent); }
.login-logo h1 { font-size: 1.4rem; font-weight: 700; color: var(--text-primary); margin-top: 8px; }
.login-logo p { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }

/* Stat cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; }
.stat-label { font-size: 0.72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 6px; }
.stat-value { font-size: 1.8rem; font-weight: 700; color: var(--text-primary); }
.stat-sub { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }

/* Status dot */
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.dot-green { background: #22c55e; box-shadow: 0 0 6px rgba(34,197,94,0.5); }
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }

/* Mono */
.mono { font-family: 'SF Mono', 'Fira Code', monospace; font-size: 0.82rem; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }