:root {
    --primary: #0a8c5e;
    --primary-dark: #076b48;
    --primary-light: #e8f7f0;
    --dark: #0f1a2e;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --bg: #f8fafc;
    --white: #ffffff;
    --red: #dc2626;
    --green: #16a34a;
    --amber: #d97706;
    --blue: #2563eb;
    --purple: #7c3aed;
    --radius: 14px;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color: var(--text); background: var(--bg); line-height: 1.5; }
a { text-decoration: none; color: inherit; }
input, select, textarea, button { font: inherit; }

/* Alerts */
.alert { padding: 14px 18px; border-radius: var(--radius); margin-bottom: 20px; font-weight: 600; }
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

/* Login */
.login-page { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, #0f1a2e, #0a8c5e); }
.login-container { width: 100%; max-width: 420px; padding: 20px; }
.login-card { background: var(--white); border-radius: 24px; padding: 40px 36px; box-shadow: 0 20px 60px rgba(0,0,0,0.2); }
.login-brand { text-align: center; margin-bottom: 32px; }
.login-brand h1 { font-size: 28px; color: var(--primary); letter-spacing: -0.03em; }
.login-brand p { color: var(--text-muted); font-weight: 600; margin-top: 4px; }
.login-footer { text-align: center; margin-top: 24px; }
.login-footer a { color: var(--text-muted); font-weight: 600; }

/* Forms */
label { display: block; margin-bottom: 16px; }
label > span { display: block; font-weight: 700; margin-bottom: 6px; font-size: 13px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
input[type="text"], input[type="email"], input[type="password"], input[type="search"], input[type="number"], select, textarea {
    width: 100%; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: 10px; background: var(--white); font-size: 15px; transition: border-color 0.2s;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(10,140,94,0.1); }
.form-hint { color: var(--text-muted); font-size: 13px; margin: -8px 0 16px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 20px; border-radius: 10px; font-weight: 700; cursor: pointer; border: none; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1.5px solid var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-full { width: 100%; }
.btn-sm { padding: 8px 14px; font-size: 13px; border-radius: 8px; }
.btn-red { background: #fee2e2; color: var(--red); border: 1px solid #fecaca; }

/* Badges */
.badge { display: inline-block; padding: 5px 10px; border-radius: 999px; font-size: 12px; font-weight: 800; }
.badge-green { background: #dcfce7; color: #166534; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-gray { background: #f1f5f9; color: #64748b; }
.badge-amber { background: #fef3c7; color: #92400e; }
.badge-blue { background: #dbeafe; color: #1e40af; }

/* Sidebar */
.sidebar { position: fixed; top: 0; left: 0; width: 260px; height: 100vh; background: linear-gradient(180deg, #0f1a2e, #162544); color: var(--white); display: flex; flex-direction: column; padding: 24px 18px; z-index: 100; }
.sidebar-brand { margin-bottom: 32px; }
.sidebar-brand h2 { font-size: 22px; letter-spacing: -0.03em; }
.sidebar-brand span { font-size: 12px; color: rgba(255,255,255,0.5); font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; }
.sidebar-nav { flex: 1; min-height: 0; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; scrollbar-width: thin; }
.sidebar-nav a { display: block; padding: 12px 14px; border-radius: 10px; font-weight: 600; color: rgba(255,255,255,0.65); transition: all 0.2s; }
.sidebar-nav a:hover { background: rgba(255,255,255,0.08); color: var(--white); }
.sidebar-nav a.active { background: rgba(10,140,94,0.25); color: var(--white); }
.sidebar-footer { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 16px; margin-top: 16px; }
.sidebar-footer .btn { width: 100%; justify-content: center; color: rgba(255,255,255,0.6); border-color: rgba(255,255,255,0.15); }
.sidebar-footer .btn:hover { color: var(--white); border-color: rgba(255,255,255,0.3); }

/* Main content */
.admin-main { margin-left: 260px; padding: 32px; min-height: 100vh; }
.admin-topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }
.admin-topbar h1 { font-size: 26px; letter-spacing: -0.03em; }
.admin-topbar span { color: var(--text-muted); font-weight: 600; }

/* Metrics */
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 28px; }
.metric-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.metric-card span { display: block; font-size: 12px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.metric-card strong { display: block; font-size: 32px; margin-top: 6px; letter-spacing: -0.03em; }
.metric-blue strong { color: var(--blue); }
.metric-green strong { color: var(--green); }
.metric-amber strong { color: var(--amber); }
.metric-purple strong { color: var(--purple); }

/* Panels */
.panel { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 20px; }
.panel-header { margin-bottom: 18px; }
.panel-header h2 { font-size: 18px; letter-spacing: -0.02em; }
.panel-header p { color: var(--text-muted); font-size: 13px; margin-top: 2px; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th { text-align: left; padding: 10px 12px; font-size: 11px; font-weight: 800; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; border-bottom: 1.5px solid var(--border); }
.data-table td { padding: 12px; border-bottom: 1px solid #f1f5f9; font-size: 14px; }
.data-table tbody tr:hover { background: #f8fafc; }
.data-table code { background: #f1f5f9; padding: 3px 7px; border-radius: 6px; font-size: 13px; font-weight: 700; }

/* Copy row */
.copy-row { display: flex; gap: 12px; align-items: center; }
.copy-row input { flex: 1; font-weight: 700; background: #f8fafc; }
.code-display { margin-top: 12px; display: flex; gap: 8px; align-items: center; color: var(--text-muted); font-size: 14px; }
.code-display strong { color: var(--text); }

/* Detail grid */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.detail-label { display: block; font-size: 11px; font-weight: 800; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 4px; }
.detail-value { display: block; font-size: 15px; font-weight: 600; }

/* Dashboard columns */
.dashboard-columns { display: grid; grid-template-columns: 1.3fr 0.9fr; gap: 20px; }

/* Empty state */
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }
.empty-state strong { display: block; font-size: 16px; color: var(--text); margin-bottom: 6px; }

/* Filters */
.filters-form { display: flex; gap: 12px; align-items: flex-end; margin-bottom: 20px; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.filters-form label { flex: 1; margin-bottom: 0; }
.filters-form label > span { display: block; font-weight: 700; margin-bottom: 4px; font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }

/* Pagination */
.pagination { display: flex; gap: 12px; align-items: center; justify-content: flex-end; margin-top: 16px; color: var(--text-muted); font-weight: 700; }
.pagination a { padding: 8px 14px; border: 1px solid var(--border); border-radius: 999px; font-weight: 700; }
.pagination strong { padding: 8px 14px; border-radius: 999px; background: var(--primary); color: #fff; }
.pagination a:hover { border-color: var(--primary); color: var(--primary); }

/* Tree */
.tree-container { padding: 12px 0; }
.tree-list { list-style: none; padding-left: 0; }
.tree-children { padding-left: 28px; border-left: 2px solid var(--border); margin-left: 12px; margin-top: 4px; }
.tree-item { margin-bottom: 4px; }
.tree-node { display: flex; align-items: center; gap: 12px; padding: 8px 12px; background: #f8fafc; border: 1px solid var(--border); border-radius: 8px; }
.tree-name { font-weight: 700; color: var(--text); }
.tree-code { font-size: 12px; background: var(--primary-light); color: var(--primary-dark); padding: 2px 8px; border-radius: 999px; font-weight: 700; }
.tree-date { font-size: 12px; color: var(--text-muted); margin-left: auto; }

/* Responsive */
@media (max-width: 1100px) {
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
    .dashboard-columns { grid-template-columns: 1fr; }
    .detail-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .sidebar { width: 100%; height: auto; position: relative; }
    .admin-main { margin-left: 0; padding: 16px; }
    .metrics-grid { grid-template-columns: 1fr; }
    .filters-form { flex-direction: column; }
}