/* ── Reset & Base ─────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#dbeafe;
  --bg:#f8fafc;--surface:#ffffff;--border:#e2e8f0;
  --text:#0f172a;--text-muted:#64748b;--text-light:#94a3b8;
  --success:#16a34a;--danger:#dc2626;--warning:#f59e0b;
  --radius:0.5rem;--radius-lg:0.75rem;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);
  --shadow-md:0 4px 6px rgba(0,0,0,.07),0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:0 10px 15px rgba(0,0,0,.1),0 4px 6px rgba(0,0,0,.05);
  --transition:150ms cubic-bezier(.4,0,.2,1);
}
html{font-size:15px;scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.6}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}

/* ── Login Page ───────────────────────────────────────── */
.login-wrapper{display:flex;min-height:100vh;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#1e3a5f 0%,#2563eb 100%)}
.login-card{background:var(--surface);border-radius:var(--radius-lg);
  padding:2.5rem;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}
.login-card h1{font-size:1.5rem;text-align:center;margin-bottom:.25rem;color:var(--text)}
.login-card .subtitle{text-align:center;color:var(--text-muted);font-size:.875rem;margin-bottom:2rem}
.login-logo{display:block;margin:0 auto 1rem;width:3rem;height:3rem;
  border-radius:var(--radius);object-fit:contain}
.form-group{margin-bottom:1.25rem}
.form-group label{display:block;font-size:.8125rem;font-weight:600;
  color:var(--text-muted);margin-bottom:.375rem}
.form-group input{width:100%;padding:.625rem .75rem;border:1px solid var(--border);
  border-radius:var(--radius);font-size:.9375rem;transition:border var(--transition);
  outline:none;background:var(--bg)}
.form-group input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.625rem 1.25rem;border:none;border-radius:var(--radius);
  font-size:.9375rem;font-weight:600;cursor:pointer;transition:all var(--transition)}
.btn-primary{background:var(--primary);color:#fff;width:100%}
.btn-primary:hover{background:var(--primary-dark);box-shadow:var(--shadow-md)}
.btn-sm{padding:.375rem .75rem;font-size:.8125rem}
.btn-ghost{background:transparent;color:var(--text-muted)}
.btn-ghost:hover{background:var(--bg);color:var(--text)}
.alert-error{background:#fef2f2;border:1px solid #fecaca;color:var(--danger);
  padding:.75rem 1rem;border-radius:var(--radius);margin-bottom:1.25rem;font-size:.875rem}

/* ── Layout ───────────────────────────────────────────── */
.app-shell{display:flex;min-height:100vh}
.sidebar{width:260px;background:var(--surface);border-right:1px solid var(--border);
  display:flex;flex-direction:column;position:fixed;top:0;bottom:0;
  z-index:100;transition:transform .2s ease}
.sidebar-header{padding:1.25rem 1rem;border-bottom:1px solid var(--border);
  display:flex;align-items:center;gap:.75rem}
.sidebar-header .brand{font-weight:700;font-size:1.125rem;color:var(--text)}
.sidebar-logo{width:2rem;height:2rem;border-radius:var(--radius);object-fit:contain}
.sidebar-nav{flex:1;overflow-y:auto;padding:.75rem 0}
.nav-section{padding:.5rem 1rem .25rem;font-size:.6875rem;font-weight:600;
  text-transform:uppercase;letter-spacing:.05em;color:var(--text-light)}
.nav-item{display:flex;align-items:center;gap:.625rem;padding:.5rem 1rem;
  color:var(--text-muted);font-size:.875rem;cursor:pointer;
  border-left:3px solid transparent;transition:all var(--transition)}
.nav-item:hover{background:var(--bg);color:var(--text)}
.nav-item.active{background:var(--primary-light);color:var(--primary);
  border-left-color:var(--primary);font-weight:600}
.nav-item .icon{width:1.25rem;text-align:center;flex-shrink:0}
.sidebar-footer{padding:1rem;border-top:1px solid var(--border);font-size:.8125rem}
.sidebar-footer a{color:var(--text-muted)}
.sidebar-footer a:hover{color:var(--danger)}

.main-content{margin-left:260px;flex:1;display:flex;flex-direction:column;min-height:100vh}
.topbar{height:3.5rem;background:var(--surface);border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem;
  position:sticky;top:0;z-index:50}
.topbar-title{font-weight:600;font-size:1.0625rem}
.topbar-right{display:flex;align-items:center;gap:.75rem}

.content{padding:1.5rem;flex:1}

/* ── Filters Bar ──────────────────────────────────────── */
.filters{display:flex;flex-wrap:wrap;gap:.75rem;align-items:end;
  padding:1rem 1.25rem;background:var(--surface);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);margin-bottom:1.5rem}
.filter-group{display:flex;flex-direction:column;gap:.25rem}
.filter-group label{font-size:.75rem;font-weight:600;color:var(--text-muted);
  text-transform:uppercase;letter-spacing:.03em}
.filter-group select,.filter-group input[type="number"]{
  padding:.4375rem .625rem;border:1px solid var(--border);border-radius:var(--radius);
  font-size:.8125rem;background:var(--bg);outline:none;min-width:100px}
.filter-group select:focus,.filter-group input:focus{
  border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}
.filter-group .checkbox-list{display:flex;flex-wrap:wrap;gap:.5rem}
.filter-group .chip{display:inline-flex;align-items:center;gap:.25rem;
  padding:.25rem .625rem;border-radius:1rem;font-size:.75rem;cursor:pointer;
  border:1px solid var(--border);background:var(--bg);transition:all var(--transition);
  user-select:none}
.filter-group .chip.selected{background:var(--primary);color:#fff;border-color:var(--primary)}
.filter-group .chip:hover{border-color:var(--primary)}

/* ── KPI Cards ────────────────────────────────────────── */
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
  gap:1rem;margin-bottom:1.5rem}
.kpi{background:var(--surface);border-radius:var(--radius-lg);padding:1.25rem;
  box-shadow:var(--shadow)}
.kpi .label{font-size:.75rem;font-weight:600;color:var(--text-muted);
  text-transform:uppercase;letter-spacing:.03em;margin-bottom:.375rem}
.kpi .value{font-size:1.75rem;font-weight:700;color:var(--text)}
.kpi .change{font-size:.8125rem;margin-top:.25rem}
.kpi .change.up{color:var(--success)}
.kpi .change.down{color:var(--danger)}

/* ── Tables ───────────────────────────────────────────── */
.table-card{background:var(--surface);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);overflow:hidden;margin-bottom:1.5rem}
.table-card .card-header{padding:.875rem 1.25rem;border-bottom:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between}
.table-card .card-header h3{font-size:.9375rem;font-weight:600}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.8125rem}
thead th{background:var(--bg);padding:.625rem .75rem;text-align:left;
  font-weight:600;color:var(--text-muted);border-bottom:2px solid var(--border);
  white-space:nowrap;position:sticky;top:0}
tbody td{padding:.5rem .75rem;border-bottom:1px solid var(--border);white-space:nowrap}
tbody tr:hover{background:#f1f5f9}
tbody tr:last-child td{border-bottom:none}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
tr.total-row{font-weight:700;background:var(--bg)}

/* ── Tabs (sub-views) ─────────────────────────────────── */
.tab-bar{display:flex;gap:0;border-bottom:2px solid var(--border);margin-bottom:1.5rem}
.tab-btn{padding:.625rem 1.25rem;font-size:.875rem;font-weight:500;
  color:var(--text-muted);cursor:pointer;border:none;background:none;
  border-bottom:2px solid transparent;margin-bottom:-2px;transition:all var(--transition)}
.tab-btn:hover{color:var(--text)}
.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}

/* ── Methodology accordion ────────────────────────────── */
.methodology{margin-bottom:1.5rem}
.methodology summary{cursor:pointer;font-size:.875rem;font-weight:600;
  color:var(--primary);padding:.625rem 0;list-style:none;display:flex;align-items:center;gap:.5rem}
.methodology summary::before{content:"▶";font-size:.625rem;transition:transform var(--transition)}
.methodology[open] summary::before{transform:rotate(90deg)}
.methodology .meth-content{padding:.75rem 1.25rem;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--radius);font-size:.8125rem;
  line-height:1.7;color:var(--text-muted)}
.methodology .meth-content strong{color:var(--text)}
.methodology .meth-content ul{margin:.5rem 0 .5rem 1.25rem}

/* ── Loading / empty ──────────────────────────────────── */
.loading{display:flex;align-items:center;justify-content:center;
  padding:3rem;color:var(--text-muted)}
.spinner{width:1.5rem;height:1.5rem;border:2px solid var(--border);
  border-top-color:var(--primary);border-radius:50%;animation:spin .6s linear infinite;
  margin-right:.75rem}
@keyframes spin{to{transform:rotate(360deg)}}
.empty-state{text-align:center;padding:3rem;color:var(--text-muted);font-size:.875rem}

/* ── Responsive ───────────────────────────────────────── */
.menu-toggle{display:none;background:none;border:none;font-size:1.25rem;
  cursor:pointer;color:var(--text)}
@media(max-width:768px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main-content{margin-left:0}
  .menu-toggle{display:block}
  .filters{flex-direction:column}
  .kpi-grid{grid-template-columns:1fr 1fr}
}