/* === App Nav === */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 2rem;
  background: rgba(10, 10, 15, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.nav-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-link:hover,
.nav-link.active { color: var(--accent); }

/* === Page header === */
.page-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 2rem;
}

.page-header-inner {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
}

.page-subtitle {
  color: var(--fg-muted);
  font-size: 0.95rem;
  max-width: 520px;
}

.header-stats {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 110px;
}

.summary-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--fg);
}

.summary-value.accent { color: var(--accent); }

.summary-label {
  font-size: 0.75rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* === Dashboard layout === */
.dashboard-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 1.5rem;
  max-width: 1300px;
  margin: 2rem auto;
  padding: 0 2rem 4rem;
}

/* === Cards === */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid var(--border);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-muted);
}

.chart-card canvas {
  display: block;
  padding: 1.5rem;
}

/* === Form === */
.add-form {
  padding: 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  flex: 1;
  min-width: 160px;
}

.form-group.full-width { flex: 1 1 100%; }

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: rgba(0, 255, 136, 0.4);
}

.form-group input::placeholder { color: var(--fg-muted); }

.live-calc { min-width: 110px; max-width: 140px; }

.live-margin {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  padding: 0.55rem 0.9rem;
  border-radius: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  transition: color 0.2s;
}

.live-margin.high { color: var(--accent); border-color: rgba(0,255,136,0.3); }
.live-margin.mid  { color: #ffcc44; border-color: rgba(255,204,68,0.3); }
.live-margin.low  { color: #ff5555; border-color: rgba(255,85,85,0.3); }

.form-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 0.65rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.85; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.form-message {
  font-size: 0.85rem;
  font-weight: 500;
}
.form-message.error   { color: #ff5555; }
.form-message.success { color: var(--accent); }

/* === Search === */
.search-input {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.45rem 0.8rem;
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 0.85rem;
  outline: none;
  width: 180px;
  transition: border-color 0.2s;
}
.search-input:focus { border-color: rgba(0,255,136,0.4); }
.search-input::placeholder { color: var(--fg-muted); }

/* === Table === */
.table-wrap {
  overflow-x: auto;
}

.products-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.products-table th {
  padding: 0.75rem 1.25rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.products-table th.num,
.products-table td.num {
  text-align: right;
}

.products-table td {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.03);
  vertical-align: middle;
  white-space: nowrap;
}

.products-table tbody tr:last-child td { border-bottom: none; }

.products-table tbody tr:hover td { background: rgba(255,255,255,0.02); }

.product-name { font-weight: 500; }

.product-link {
  color: var(--fg);
  text-decoration: none;
  transition: color 0.2s;
}
.product-link:hover { color: var(--accent); }

.category-badge {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--fg-muted);
  background: rgba(255,255,255,0.05);
  border-radius: 100px;
  padding: 0.25rem 0.7rem;
}

.profit-cell {
  font-family: var(--font-mono);
  font-weight: 500;
}

.margin-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
}

.margin-badge.high { color: var(--accent); background: var(--accent-dim); }
.margin-badge.mid  { color: #ffcc44; background: rgba(255,204,68,0.1); }
.margin-badge.low  { color: #ff5555; background: rgba(255,85,85,0.1); }

.muted { color: var(--fg-muted); font-family: var(--font-mono); }

.action-col { width: 40px; text-align: center; }

.btn-delete {
  background: none;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--fg-muted);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  transition: color 0.2s, border-color 0.2s;
}
.btn-delete:hover { color: #ff5555; border-color: rgba(255,85,85,0.3); }

/* === Empty state === */
.empty-state {
  padding: 4rem 2rem;
  text-align: center;
  color: var(--fg-muted);
}
.empty-state.small { padding: 2rem; }
.empty-icon { font-size: 2.5rem; margin-bottom: 1rem; }

/* === Category sidebar === */
.category-list {
  padding: 1rem 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.category-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.category-info {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 100px;
  max-width: 100px;
}

.category-name {
  font-size: 0.85rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.category-count {
  font-size: 0.7rem;
  color: var(--fg-muted);
}

.category-margin-bar-wrap {
  flex: 1;
  background: rgba(255,255,255,0.04);
  border-radius: 100px;
  height: 6px;
  overflow: hidden;
}

.category-margin-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 100px;
  opacity: 0.6;
  transition: width 0.6s ease;
}

.category-margin-val {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  min-width: 42px;
  text-align: right;
}

.category-margin-val.high { color: var(--accent); }
.category-margin-val.mid  { color: #ffcc44; }
.category-margin-val.low  { color: #ff5555; }

/* === Responsive === */
@media (max-width: 1024px) {
  .dashboard-layout {
    grid-template-columns: 1fr;
    padding: 0 1.25rem 3rem;
  }
  .side-col { order: -1; display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-bottom: 0; }
  .side-col .card { margin-bottom: 0; }
}

@media (max-width: 640px) {
  .side-col { grid-template-columns: 1fr; }
  .page-header-inner { flex-direction: column; }
  .header-stats { width: 100%; }
  .form-row { flex-direction: column; }
  .live-calc { max-width: 100%; }
}