:root {
  --sq-bg: #f5f5f6;
  --sq-surface: #ffffff;
  --sq-border-subtle: #e4e4e7;
  --sq-border-strong: #d4d4d8;
  --sq-text-primary: #111827;
  --sq-text-secondary: #4b5563;
  --sq-text-muted: #6b7280;
  --sq-primary: #006aff;
  --sq-primary-hover: #0054c2;
  --sq-danger: #de3b40;
  --sq-danger-hover: #c02f34;
  --sq-success: #15803d;
  --sq-radius-md: 8px;
  --sq-radius-lg: 10px;
  --sq-shadow-soft: 0 4px 10px rgba(15,23,42,0.06);
  --sq-shadow-card: 0 1px 3px rgba(0,0,0,0.06);
  --sq-font-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

/* Base layout */
html, body {
  margin: 0;
  padding: 0;
  background: var(--sq-bg);
  color: var(--sq-text-primary);
  font-family: var(--sq-font-base);
  -webkit-font-smoothing: antialiased;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: #ffffff;
  border-bottom: 1px solid var(--sq-border-subtle);
}

/* Side navigation */
.side-nav {
  background: #ffffff;
  border-right: 1px solid var(--sq-border-subtle);
}

.nav-items {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  border-radius: var(--sq-radius-md);
  padding: 8px 10px;
  color: var(--sq-text-secondary);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.nav-item:hover {
  background: rgba(0,0,0,0.035);
}

.nav-item.active {
  background: rgba(0,106,255,0.08);
  color: var(--sq-text-primary);
  font-weight: 500;
}

/* Tab content containers */
.tab-content {
  background: var(--sq-surface);
  border-radius: var(--sq-radius-lg);
  border: 1px solid var(--sq-border-subtle);
  box-shadow: var(--sq-shadow-soft);
  padding: 24px;
  margin: 16px 0;
}

/* Functional modules (distinct features inside a tab) */
.module {
  background: #fafafa;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  box-shadow: 0 1px 3px rgba(15,23,42,0.06);
  padding: 16px 18px;
  margin-bottom: 16px;
}

.module--primary {
  border-left: 4px solid #006aff;
}

.module--secondary {
  border-left: 4px solid #6b7280;
}

.module--danger {
  border-left: 4px solid #de3b40;
}

.module-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.module-title {
  font-size: 15px;
  font-weight: 600;
  color: #111827;
}

.module-subtitle {
  font-size: 13px;
  color: #6b7280;
}

.module-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid #e5e7eb;
  color: #4b5563;
  background: #f9fafb;
}

.module-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.module-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

@media (min-width: 960px) {
  .module-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

/* Headings */
.tab-content h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0 0 12px 0;
  color: var(--sq-text-primary);
}

.tab-content h2 {
  font-size: 18px;
  font-weight: 500;
  margin: 0 0 10px 0;
  color: var(--sq-text-primary);
  border-bottom: 1px solid var(--sq-border-subtle);
  padding-bottom: 6px;
}

.tab-content h3 {
  font-size: 15px;
  font-weight: 500;
  margin: 0 0 8px 0;
  color: var(--sq-text-primary);
}

/* Buttons */
button {
  font-family: var(--sq-font-base);
  border-radius: var(--sq-radius-md);
  padding: 8px 14px;
  font-size: 13px;
  line-height: 1.3;
  border: 1px solid transparent;
  cursor: pointer;
  background: #e5e7eb;
  color: var(--sq-text-primary);
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.08s ease;
}

button:hover {
  filter: brightness(0.97);
  transform: translateY(-0.5px);
}

button:active {
  transform: translateY(0);
}

/* Map legacy inline colors to system */
button[style*="#007bff"],
button[style*="#1a73e8"],
button[style*="#1976d2"],
button[style*="#0056b3"],
button[style*="#007cba"],
button.primary-btn {
  background: var(--sq-primary) !important;
  border-color: var(--sq-primary) !important;
  color: #ffffff !important;
}

button[style*="#28a745"],
button[style*="#137333"],
button[style*="#81c784"] {
  background: var(--sq-success) !important;
  border-color: var(--sq-success) !important;
  color: #ffffff !important;
}

button[style*="#dc3545"],
button[style*="#c82333"],
button[style*="#b0413e"] {
  background: #de3b40 !important;
  border-color: #de3b40 !important;
  color: #ffffff !important;
}

button[style*="#6c757d"],
button[style*="#5f6368"],
button[style*="#6e6e6e"] {
  background: #e5e7eb !important;
  border-color: #d4d4d8 !important;
  color: var(--sq-text-primary) !important;
}

/* Inputs */
input[type="text"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
select,
textarea {
  border-radius: var(--sq-radius-md);
  border: 1px solid var(--sq-border-subtle);
  padding: 8px 10px;
  font-size: 13px;
  background: #ffffff;
  color: var(--sq-text-primary);
}

input::placeholder,
textarea::placeholder {
  color: #9ca3af;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(0,106,255,0.15);
  border-color: var(--sq-primary);
}

/* Tables */
table {
  border-collapse: collapse;
  width: 100%;
  background: #ffffff;
}

th,
td {
  border: 1px solid var(--sq-border-subtle);
  padding: 8px 10px;
  font-size: 13px;
  text-align: left;
}

th {
  background: #f3f4f6;
  color: var(--sq-text-secondary);
  font-weight: 600;
}

tbody tr:nth-child(even) {
  background: #fafafa;
}

tbody tr:hover {
  background: #f9fafb;
}

/* Status/info panels */
.status,
[id*="status"],
#sales-trend-result,
#monthly-trend-results,
#inventory-status,
#last-fetch,
#po-status {
  background: #f9fafb;
  border-radius: var(--sq-radius-md);
  border: 1px solid var(--sq-border-subtle);
  color: var(--sq-text-muted);
  padding: 12px 14px;
}

/* Floating order button */
.floating-order-btn {
  position: fixed;
  right: 20px;
  bottom: 20px;
  padding: 10px 18px;
  background: #111827;
  color: #ffffff;
  border-radius: 999px;
  text-decoration: none;
  font-size: 13px;
  box-shadow: var(--sq-shadow-soft);
}

/* Accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid rgba(0,106,255,0.65);
  outline-offset: 2px;
}

/* Force each section into its own row */
.srx-grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  width: 100%;
}

/* Top row: two columns for Report + Summary */
.srx-top {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

@media (max-width: 1023px) {
  .srx-top {
    grid-template-columns: 1fr;
  }
}

/* Each remaining row stacked full-width */
.srx-trend,
.srx-metrics,
.srx-details {
  display: block;
  width: 100%;
}

/* Ensure child modules expand full width */
.srx-top > div > *,
.srx-trend > *,
.srx-metrics > *,
.srx-details > * {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}