:root {
  --bg-base: #0F172A;
  --bg-surface: #1E293B;
  --bg-card: #1E293B;
  --bg-card2: #263348;
  --border: #334155;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --accent: #3B82F6;
  --accent-hover: #2563EB;
  --gain: #10B981;
  --gain-bg: rgba(16,185,129,.12);
  --loss: #EF4444;
  --loss-bg: rgba(239,68,68,.12);
  --warn: #F59E0B;
  --warn-bg: rgba(245,158,11,.12);
  --neutral: #94A3B8;
  --sidebar-w: 240px;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,.35);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ─────────────── Layout ─────────────────────────── */
.layout { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  transition: transform .25s ease;
}

.sidebar-logo {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: .75rem;
}

.sidebar-logo .logo-icon {
  width: 34px; height: 34px;
  background: var(--accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: .9rem; color: #fff; flex-shrink: 0;
}

.sidebar-logo .logo-text { font-weight: 700; font-size: 1rem; color: var(--text-primary); }

.sidebar-nav { flex: 1; padding: 1rem 0; overflow-y: auto; }

.nav-section { padding: .25rem 1rem .5rem; font-size: .7rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); }

.nav-link {
  display: flex; align-items: center; gap: .75rem;
  padding: .65rem 1.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all .15s ease;
}

.nav-link:hover { color: var(--text-primary); background: rgba(255,255,255,.04); }
.nav-link.active { color: var(--accent); border-left-color: var(--accent); background: rgba(59,130,246,.08); }

.nav-link svg { width: 18px; height: 18px; flex-shrink: 0; }

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
  font-size: .8rem; color: var(--text-muted);
}

.main { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; min-height: 100vh; }

.topbar {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: .875rem 1.75rem;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50;
}

.topbar-left { display: flex; align-items: center; gap: 1rem; }
.topbar-title { font-size: 1rem; font-weight: 600; color: var(--text-primary); }

.topbar-right { display: flex; align-items: center; gap: .75rem; }

.content { padding: 1.75rem; flex: 1; }

/* ─────────────── Cards ──────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.card-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1rem; padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}

.card-title { font-size: .9rem; font-weight: 600; color: var(--text-primary); }

/* ─────────────── Stat Cards ─────────────────────── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
}

.stat-card.gain::before { background: var(--gain); }
.stat-card.loss::before { background: var(--loss); }
.stat-card.warn::before { background: var(--warn); }

.stat-label { font-size: .75rem; font-weight: 500; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: .35rem; }
.stat-value { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); line-height: 1.2; }
.stat-sub   { font-size: .8rem; color: var(--text-secondary); margin-top: .25rem; }

/* ─────────────── P&L Colors ─────────────────────── */
.text-gain { color: var(--gain) !important; }
.text-loss { color: var(--loss) !important; }
.text-neutral { color: var(--text-secondary) !important; }
.text-warn { color: var(--warn) !important; }

.badge { display: inline-flex; align-items: center; padding: .2rem .6rem; border-radius: 20px; font-size: .72rem; font-weight: 600; }
.badge-gain { background: var(--gain-bg); color: var(--gain); }
.badge-loss { background: var(--loss-bg); color: var(--loss); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-neutral { background: rgba(148,163,184,.12); color: var(--neutral); }
.badge-blue    { background: rgba(59,130,246,.15); color: var(--accent); }

/* ─────────────── Tables ─────────────────────────── */
.table-wrap { overflow-x: auto; }

table.data-table { width: 100%; border-collapse: collapse; font-size: .85rem; }
table.data-table thead th {
  background: var(--bg-base);
  color: var(--text-muted);
  font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .04em;
  padding: .75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

table.data-table tbody tr {
  border-bottom: 1px solid rgba(51,65,85,.5);
  transition: background .12s;
}

table.data-table tbody tr:hover { background: rgba(255,255,255,.03); }
table.data-table tbody td { padding: .75rem 1rem; color: var(--text-secondary); vertical-align: middle; }
table.data-table tbody td.fw { color: var(--text-primary); font-weight: 500; }

.row-gain td { background: rgba(16,185,129,.04); }
.row-loss td { background: rgba(239,68,68,.04); }

/* ─────────────── Buttons ────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .5rem 1rem;
  border-radius: 7px; font-size: .85rem; font-weight: 500; cursor: pointer;
  border: none; text-decoration: none; transition: all .15s ease; white-space: nowrap; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-card2); color: var(--text-secondary); border: 1px solid var(--border); }
.btn-secondary:hover { color: var(--text-primary); background: var(--bg-surface); }
.btn-danger { background: var(--loss-bg); color: var(--loss); border: 1px solid rgba(239,68,68,.3); }
.btn-danger:hover { background: rgba(239,68,68,.2); }
.btn-sm { padding: .3rem .7rem; font-size: .78rem; }
.btn-icon { padding: .4rem; border-radius: 6px; }

/* ─────────────── Forms ──────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-label { display: block; font-size: .82rem; font-weight: 500; color: var(--text-secondary); margin-bottom: .35rem; }
.form-control {
  width: 100%; padding: .6rem .85rem;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-primary);
  font-size: .875rem;
  transition: border-color .15s;
  outline: none;
}

.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
.form-control option { background: var(--bg-surface); }

select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394A3B8' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .75rem center; padding-right: 2.25rem; }

.form-row { display: grid; gap: 1rem; }
.form-row.cols-2 { grid-template-columns: 1fr 1fr; }
.form-row.cols-3 { grid-template-columns: 1fr 1fr 1fr; }

/* ─────────────── Alerts ─────────────────────────── */
.alert { padding: .85rem 1.1rem; border-radius: var(--radius); font-size: .875rem; display: flex; align-items: center; gap: .6rem; }
.alert-success { background: var(--gain-bg); color: var(--gain); border: 1px solid rgba(16,185,129,.3); }
.alert-error   { background: var(--loss-bg); color: var(--loss); border: 1px solid rgba(239,68,68,.3); }
.alert-warn    { background: var(--warn-bg); color: var(--warn); border: 1px solid rgba(245,158,11,.3); }

/* ─────────────── Modal ──────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.65); z-index: 200;
  display: flex; align-items: center; justify-content: center; padding: 1rem;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 100%; max-width: 520px;
  max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow);
}

.modal-title { font-size: 1rem; font-weight: 600; margin-bottom: 1.25rem; }

/* ─────────────── Chart containers ──────────────── */
.chart-wrap { position: relative; height: 260px; }
.chart-wrap-sm { height: 180px; }

/* ─────────────── Portfolio donut ───────────────── */
.donut-wrap { position: relative; height: 200px; display: flex; align-items: center; justify-content: center; }

/* ─────────────── Scrollbar ──────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #475569; }

/* ─────────────── Utilities ──────────────────────── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: .5rem; }
.gap-2 { gap: 1rem; }
.mb-1 { margin-bottom: .5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-1 { margin-top: .5rem; }
.text-sm { font-size: .8rem; }
.text-xs { font-size: .72rem; }
.font-bold { font-weight: 700; }
.text-muted { color: var(--text-muted) !important; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.w-full { width: 100%; }
.hidden { display: none; }
.divider { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }

/* ─────────────── Auth Layout ────────────────────── */
.auth-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--bg-base); padding: 2rem;
}

.auth-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%; max-width: 420px;
  box-shadow: var(--shadow);
}

.auth-logo { text-align: center; margin-bottom: 2rem; }
.auth-logo .logo-icon { width: 48px; height: 48px; background: var(--accent); border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1.2rem; color: #fff; margin-bottom: .75rem; }

/* ─────────────── DataTables overrides ───────────── */
.dataTables_wrapper { color: var(--text-secondary); font-size: .85rem; }
.dataTables_filter input, .dataTables_length select {
  background: var(--bg-base) !important; border: 1px solid var(--border) !important;
  color: var(--text-primary) !important; border-radius: 6px !important; padding: .35rem .6rem !important;
}
.dataTables_filter label, .dataTables_length label { color: var(--text-muted) !important; }
.dataTables_info { color: var(--text-muted) !important; }
.dataTables_paginate .paginate_button { color: var(--text-secondary) !important; border-radius: 5px !important; }
.dataTables_paginate .paginate_button.current { background: var(--accent) !important; color: #fff !important; border: none !important; }
.dataTables_paginate .paginate_button:hover { background: var(--bg-card2) !important; color: var(--text-primary) !important; }

/* ─────────────── Responsive ─────────────────────── */
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: .4rem; color: var(--text-secondary); }

@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .hamburger { display: flex; }
  .sidebar-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 99; display: none; }
  .sidebar-overlay.show { display: block; }
  .form-row.cols-3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row.cols-2, .form-row.cols-3 { grid-template-columns: 1fr; }
  .content { padding: 1rem; }
  .topbar { padding: .75rem 1rem; }
}