:root {
  --bg: #faf8f4;
  --card: #ffffff;
  --border: #e8e4dc;
  --ink: #1a1a1a;
  --muted: #767268;
  --gold: #b8863a;
  --green: #3a8f5c;
  --sidebar: #17171a;
  --sidebar-muted: #9a978f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, sans-serif;
}

h1, h2 { font-family: 'Playfair Display', Georgia, serif; margin: 0; }

#app[hidden] { display: none; }

#app {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar);
  color: #fff;
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
}

.brand-name { font-family: 'Playfair Display', serif; font-size: 1.1rem; letter-spacing: 0.06em; }
.brand-sub { font-size: 0.65rem; letter-spacing: 0.25em; color: var(--sidebar-muted); margin-top: 2px; }

nav { margin-top: 48px; display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  padding: 10px 12px;
  border-radius: 8px;
  color: #cfcdc6;
  font-size: 0.9rem;
  cursor: default;
}
.nav-item.active { background: #2a2a2e; color: #fff; }

.sidebar-footer {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid #2c2c30;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--sidebar-muted);
  line-height: 1.6;
}

main { padding: 32px 36px; max-width: 1400px; }

.topbar { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 16px; margin-bottom: 28px; }
.topbar h1 { font-size: 1.7rem; }
.subtitle { color: var(--muted); margin: 6px 0 0; font-size: 0.92rem; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
}

.stat-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.stat-label { font-size: 0.82rem; color: var(--muted); }
.stat-value { font-size: 1.8rem; font-weight: 600; margin-top: 6px; }
.trend { font-size: 0.78rem; margin-top: 6px; }
.trend.up { color: var(--green); }
.trend.down { color: #b3492f; }

.main-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  align-items: start;
}

.left-col, .right-col { display: flex; flex-direction: column; gap: 20px; }

.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.card-header h2 { font-size: 1.1rem; }

.chart-wrap { height: 260px; }
.chart-legend { display: flex; gap: 14px; font-size: 0.78rem; color: var(--muted); }
.legend-item { display: flex; align-items: center; gap: 6px; }
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }

.products-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.products-table th {
  text-align: left;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.products-table td { padding: 10px; border-bottom: 1px solid var(--border); }
.product-cell { display: flex; align-items: center; gap: 10px; }
.swatch { width: 26px; height: 26px; border-radius: 50%; background: linear-gradient(135deg, #d8c9a3, #b8863a); flex-shrink: 0; display: inline-block; }
.empty { color: var(--muted); text-align: center; padding: 20px !important; }

.session-header { display: flex; align-items: center; gap: 12px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; background: #ece7dc; display: flex; align-items: center; justify-content: center; font-weight: 600; color: var(--gold); }
.session-title { font-weight: 600; font-size: 0.92rem; display: flex; align-items: center; gap: 8px; }
.badge { background: #e4f3e9; color: var(--green); font-size: 0.68rem; padding: 2px 8px; border-radius: 20px; font-weight: 500; }
.session-meta { font-size: 0.78rem; color: var(--muted); margin-top: 2px; }

.session-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 18px 0; }
.session-stats div { display: flex; flex-direction: column; }
.session-stats strong { font-size: 1.1rem; }
.session-stats span { font-size: 0.7rem; color: var(--muted); }

.top-products-label { font-size: 0.8rem; color: var(--muted); margin-bottom: 8px; }
.top-products-list { display: flex; flex-direction: column; gap: 10px; }
.top-product-row { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; }
.top-product-info { flex: 1; }
.muted { color: var(--muted); font-size: 0.78rem; }

.insight-card { display: flex; flex-direction: column; gap: 8px; background: #f4efe3; border-color: #e6ddc6; }
.insight-icon { font-size: 1.3rem; }
.insight-text { font-weight: 500; }
.insight-detail { font-size: 0.82rem; color: var(--muted); }

.login-screen[hidden] { display: none; }

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--sidebar);
}
.login-card {
  background: var(--card);
  padding: 36px;
  border-radius: 14px;
  width: 320px;
  display: flex;
  flex-direction: column;
}
.login-card .brand-sub { color: #767268; }
.login-subtitle {
  margin-top: 18px;
  margin-bottom: 22px;
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: normal;
  font-family: 'Inter', sans-serif;
}
.login-card label { font-size: 0.82rem; color: var(--muted); margin-top: 14px; display: flex; flex-direction: column; gap: 6px; }
.login-card input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
}
.login-card button {
  margin-top: 22px;
  padding: 11px;
  border: none;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}
.login-error { color: #b3492f; font-size: 0.8rem; margin-top: 10px; min-height: 1em; }

.topbar-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; }
.date-range { font-size: 0.85rem; padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px; background: var(--card); }

.filters { display: flex; gap: 10px; flex-wrap: wrap; }
.filters select {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  font-family: inherit;
  font-size: 0.85rem;
}
.filters select:disabled { color: var(--muted); cursor: not-allowed; }

.profile { display: flex; align-items: center; gap: 12px; font-size: 0.88rem; }
.bell { font-size: 1.1rem; }
.avatar-sm {
  width: 30px; height: 30px; border-radius: 50%;
  background: #ece7dc; color: var(--gold);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 600;
}

.view-all { font-size: 0.78rem; color: var(--gold); cursor: default; white-space: nowrap; }
.stat-header-row { display: flex; justify-content: space-between; align-items: flex-start; }
.stat-icon {
  width: 34px; height: 34px; border-radius: 50%;
  background: #f4efe3; display: flex; align-items: center; justify-content: center;
  font-size: 0.95rem; margin-bottom: 10px;
}

.logout-button {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

@media (max-width: 900px) {
  #app { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .stat-cards { grid-template-columns: 1fr 1fr; }
  .main-grid { grid-template-columns: 1fr; }
}