/* ====================================================================
   E-Commerce Order Analytics – style.css
   Clean, minimal, professional. No external dependencies.
   ==================================================================== */

/* ── Variables ────────────────────────────────────────────────────── */
:root {
  --primary:        #2563eb;
  --primary-dk:     #1d4ed8;
  --primary-lt:     #eff6ff;
  --success:        #16a34a;
  --success-lt:     #f0fdf4;
  --warning:        #d97706;
  --warning-lt:     #fffbeb;
  --danger:         #dc2626;
  --danger-lt:      #fef2f2;
  --bg:             #f1f5f9;
  --surface:        #ffffff;
  --border:         #e2e8f0;
  --border-dk:      #cbd5e1;
  --text:           #0f172a;
  --text-muted:     #64748b;
  --text-light:     #94a3b8;
  --sidebar-bg:     #1e293b;
  --sidebar-text:   #cbd5e1;
  --sidebar-active: #2563eb;
  --sidebar-hover:  #334155;
  --sidebar-width:  220px;
  --header-h:       60px;
  --radius:         10px;
  --radius-sm:      6px;
  --shadow:         0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:      0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.05);
  --shadow-lg:      0 8px 24px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.06);
  --transition:     0.15s ease;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── App shell: sidebar + main ────────────────────────────────────── */
.app-shell {
  display: flex;
  min-height: 100vh;
}

/* ── Sidebar ──────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 200;
  transition: transform var(--transition);
  overflow-y: auto;
}

.sidebar-brand {
  padding: 1.5rem 1.25rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}

.sidebar-brand-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: #f8fafc;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.sidebar-brand-sub {
  font-size: 0.72rem;
  color: var(--text-light);
  margin-top: 0.2rem;
  letter-spacing: 0.02em;
}

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

.sidebar-nav-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-light);
  padding: 0.75rem 1.25rem 0.35rem;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.875rem;
  color: var(--sidebar-text);
  transition: background var(--transition), color var(--transition);
  border-radius: 0;
  text-decoration: none;
  position: relative;
}

.sidebar-nav a:hover {
  background: var(--sidebar-hover);
  color: #f8fafc;
  text-decoration: none;
}

.sidebar-nav a.active {
  background: rgba(37,99,235,0.18);
  color: #93c5fd;
  font-weight: 500;
}

.sidebar-nav a.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: #60a5fa;
  border-radius: 0 2px 2px 0;
}

.sidebar-nav .nav-icon {
  width: 16px;
  text-align: center;
  font-size: 0.85rem;
  flex-shrink: 0;
  opacity: 0.8;
}

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.07);
  font-size: 0.72rem;
  color: var(--text-light);
  line-height: 1.5;
}

/* ── Main area (right of sidebar) ─────────────────────────────────── */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Top header ───────────────────────────────────────────────────── */
.top-header {
  height: var(--header-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 1.75rem;
  gap: 1rem;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-header-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.top-header-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.05rem;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.35rem;
  color: var(--text);
  font-size: 1.25rem;
  line-height: 1;
  border-radius: var(--radius-sm);
}

.menu-toggle:hover { background: var(--bg); }

/* Dataset status badge in header */
.header-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid;
}

.header-status.ready {
  background: var(--success-lt);
  border-color: #bbf7d0;
  color: var(--success);
}

.header-status.sample {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: #1d4ed8;
}

.header-status.none {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text-muted);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.ready .status-dot  { background: var(--success); }
.sample .status-dot { background: var(--primary); }
.none .status-dot   { background: var(--text-light); }

/* ── Page content ─────────────────────────────────────────────────── */
.page-content {
  flex: 1;
  padding: 1.75rem;
}

/* ── Footer ───────────────────────────────────────────────────────── */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 0.9rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Page header ──────────────────────────────────────────────────── */
.page-header {
  margin-bottom: 1.5rem;
}

.page-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.page-header p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 0.3rem;
}

/* ── Section title ────────────────────────────────────────────────── */
.section-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ── Cards ────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.card-title-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

/* ── KPI grid ─────────────────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.kpi-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--primary);
  opacity: 0.6;
}

.kpi-card.kpi-success::before { background: var(--success); }
.kpi-card.kpi-warning::before { background: var(--warning); }
.kpi-card.kpi-danger::before  { background: var(--danger); }

.kpi-icon {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  opacity: 0.7;
}

.kpi-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.kpi-value {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.kpi-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.kpi-change {
  font-size: 0.78rem;
  font-weight: 600;
  margin-top: 0.3rem;
}

.kpi-up   { color: var(--success); }
.kpi-down { color: var(--danger);  }
.kpi-warn { color: var(--warning); }

/* Dataset overview cards (4 small ones) */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.overview-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  box-shadow: var(--shadow);
}

.overview-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
}

.overview-value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.01em;
}

.overview-sub {
  font-size: 0.7rem;
  color: var(--text-light);
  margin-top: 0.1rem;
}

/* ── Empty state ──────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.empty-state p {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 380px;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
}

.empty-state-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  transition: background var(--transition), box-shadow var(--transition),
              border-color var(--transition), color var(--transition);
  line-height: 1.4;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.btn:disabled, .btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dk);
  border-color: var(--primary-dk);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: #fff;
}

.btn-secondary {
  background: var(--bg);
  color: var(--text);
  border-color: var(--border-dk);
}
.btn-secondary:hover {
  background: #e2e8f0;
  text-decoration: none;
  color: var(--text);
}

.btn-outline {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}
.btn-outline:hover {
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

.btn-sm {
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
}

.btn-lg {
  padding: 0.65rem 1.5rem;
  font-size: 0.95rem;
}

/* ── Forms ────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  margin-bottom: 0.3rem;
  color: var(--text);
}

.form-group .help-text {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

input[type="date"],
select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  background: var(--surface);
  color: var(--text);
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: inherit;
}

input[type="date"]:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

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

.form-row .form-group {
  flex: 1;
  min-width: 130px;
  margin-bottom: 0;
}

.form-group-btn { flex: 0 0 auto !important; }

.form-actions { margin-top: 1.25rem; }

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.855rem;
}

.data-table th {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg);
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}

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

.data-table td {
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

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

.data-table tbody tr:hover td { background: #f8fafc; }

.data-table .rank {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  width: 2rem;
}

td.empty-cell, p.empty {
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
  padding: 1.5rem;
}

/* ── Badges / pills ───────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-blue    { background: #eff6ff;  color: #1d4ed8; }
.badge-green   { background: #f0fdf4;  color: #15803d; }
.badge-amber   { background: #fffbeb;  color: #b45309; }
.badge-red     { background: #fef2f2;  color: #b91c1c; }
.badge-gray    { background: #f1f5f9;  color: #475569; }

/* ── Alerts ───────────────────────────────────────────────────────── */
.alert {
  display: flex;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  border: 1px solid;
  margin-bottom: 1rem;
}

.alert-icon { font-size: 1rem; flex-shrink: 0; margin-top: 0.05rem; }

.alert-body { flex: 1; }
.alert-body strong { display: block; font-weight: 600; margin-bottom: 0.15rem; }

.alert-error {
  background: var(--danger-lt);
  border-color: #fecaca;
  color: #991b1b;
}

.alert-success {
  background: var(--success-lt);
  border-color: #bbf7d0;
  color: #15803d;
}

.alert-warning {
  background: var(--warning-lt);
  border-color: #fde68a;
  color: #92400e;
}

.alert-dismiss {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  color: inherit;
  opacity: 0.6;
  padding: 0;
  align-self: flex-start;
}
.alert-dismiss:hover { opacity: 1; }

/* ── Status bar (dataset info strip) ─────────────────────────────── */
.status-strip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1.1rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.82rem;
  box-shadow: var(--shadow);
}

.status-strip-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
}

.status-strip-item strong { color: var(--text); }

.status-strip-sep {
  color: var(--border-dk);
  font-size: 1rem;
}

/* ── Divider ──────────────────────────────────────────────────────── */
.divider {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin: 1.25rem 0;
  position: relative;
}
.divider::before, .divider::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 43%;
  height: 1px;
  background: var(--border);
}
.divider::before { left: 0; }
.divider::after  { right: 0; }

/* ── Upload page ──────────────────────────────────────────────────── */
.upload-intro {
  margin-bottom: 1.5rem;
}

.upload-intro h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.upload-intro p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.3rem;
}

.required-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.required-pill {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.65rem;
  background: var(--primary-lt);
  color: var(--primary);
  border-radius: 999px;
  border: 1px solid #bfdbfe;
}

/* 2-column upload card grid */
.upload-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

/* Individual upload drop zone */
.upload-zone {
  background: var(--surface);
  border: 2px dashed var(--border-dk);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  text-align: center;
  transition: border-color var(--transition), background var(--transition);
  cursor: pointer;
  position: relative;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--primary);
  background: var(--primary-lt);
}

.upload-zone.has-file {
  border-color: var(--success);
  background: var(--success-lt);
  border-style: solid;
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.upload-zone-icon {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.upload-zone-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.upload-zone-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.upload-zone-filename {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--success);
  margin-top: 0.4rem;
}

.upload-zone-filename.empty {
  color: var(--text-muted);
  font-style: normal;
  font-weight: 400;
}

/* Sample dataset card */
.sample-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  text-align: center;
}

.sample-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.sample-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.sample-stats {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.sample-stat {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
}

.sample-stat strong {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
}

/* Schema collapsible */
.schema-collapsible {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.schema-toggle {
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  font-family: inherit;
  text-align: left;
}

.schema-toggle:hover { background: var(--bg); }

.schema-toggle-arrow {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.schema-toggle[aria-expanded="true"] .schema-toggle-arrow {
  transform: rotate(180deg);
}

.schema-body {
  display: none;
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--border);
}

.schema-body.open { display: block; }

.schema-section { margin-top: 1rem; }

.schema-section-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.4rem;
  margin-top: 0.85rem;
}

.schema-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.schema-table th {
  background: var(--bg);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  text-align: left;
}

.schema-table td {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  color: var(--text);
}

/* Upload overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
}

.overlay.hidden { display: none; }

.overlay-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 3rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  max-width: 360px;
  width: 90%;
}

.overlay-box h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.overlay-box p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.processing-steps {
  list-style: none;
  text-align: left;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.processing-steps li {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.processing-steps li::before {
  content: "·";
  font-size: 1.2rem;
  color: var(--primary);
  line-height: 1;
}

/* Spinner */
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Data quality page ────────────────────────────────────────────── */
.dq-summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.dq-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
  text-align: center;
}

.dq-card.ok   { border-top: 3px solid var(--success); }
.dq-card.warn { border-top: 3px solid var(--warning); }

.dq-count {
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.dq-card.ok   .dq-count { color: var(--success); }
.dq-card.warn .dq-count { color: var(--warning); }

.dq-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

.dq-status {
  font-size: 0.7rem;
  margin-top: 0.3rem;
  font-weight: 600;
}

.dq-card.ok   .dq-status { color: var(--success); }
.dq-card.warn .dq-status { color: var(--warning); }

/* ── Return rate bars ─────────────────────────────────────────────── */
.return-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

.return-row:last-child { border-bottom: none; }

.return-label {
  font-size: 0.85rem;
  color: var(--text);
  min-width: 120px;
}

.return-bar-wrap {
  flex: 1;
  background: var(--bg);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}

.return-bar {
  height: 100%;
  border-radius: 999px;
  background: var(--warning);
  transition: width 0.3s ease;
}

.return-pct {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 40px;
  text-align: right;
}

/* ── Report results section ───────────────────────────────────────── */
.report-results {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.report-results-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.report-results-title small {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 400;
}

.report-sub-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  margin: 1.25rem 0 0.5rem;
}

.prev-period-note {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  padding: 0.6rem 0.85rem;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--border-dk);
}

/* ── Error page ───────────────────────────────────────────────────── */
.error-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 50vh;
}

.error-card {
  max-width: 500px;
  width: 100%;
  text-align: center;
}

.error-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--danger);
}

.error-card h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.error-message {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.6;
  padding: 0.75rem 1rem;
  background: var(--danger-lt);
  border: 1px solid #fecaca;
  border-radius: var(--radius-sm);
  text-align: left;
}

.error-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 1100px) {
  .kpi-grid        { grid-template-columns: repeat(2, 1fr); }
  .overview-grid   { grid-template-columns: repeat(2, 1fr); }
  .dq-summary-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  :root { --sidebar-width: 0px; }

  .sidebar {
    transform: translateX(-220px);
    width: 220px;
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-wrapper { margin-left: 0; }

  .menu-toggle { display: flex; }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 199;
  }

  .sidebar-overlay.visible { display: block; }

  .upload-cards-grid { grid-template-columns: 1fr; }

  .form-row { flex-direction: column; }
}

@media (max-width: 640px) {
  .page-content { padding: 1rem; }

  .kpi-grid        { grid-template-columns: repeat(2, 1fr); }
  .overview-grid   { grid-template-columns: repeat(2, 1fr); }
  .dq-summary-grid { grid-template-columns: repeat(2, 1fr); }

  .kpi-value { font-size: 1.35rem; }

  .top-header { padding: 0 1rem; }
  .site-footer { padding: 0.75rem 1rem; }

  .status-strip { gap: 0.75rem; }

  .return-label { min-width: 90px; font-size: 0.78rem; }
}

@media (max-width: 480px) {
  .kpi-grid        { grid-template-columns: 1fr; }
  .overview-grid   { grid-template-columns: repeat(2, 1fr); }
  .dq-summary-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Utility ──────────────────────────────────────────────────────── */
.text-right   { text-align: right; }
.text-center  { text-align: center; }
.text-muted   { color: var(--text-muted); }
.mt-0         { margin-top: 0 !important; }
.mb-0         { margin-bottom: 0 !important; }
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}