/* FLENDER Platform — BizLink-inspired clean UI */
:root {
  --black: #1f1f1f;
  --cream: #f6f7ed;
  --gray-50: #fafafa;
  --gray-100: #f4f4f4;
  --gray-200: #e5e5e5;
  --gray-300: #d4d4d4;
  --gray-400: #a3a3a3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --white: #ffffff;
  --success: #22c55e;
  --success-dark: #16a34a;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 8px;
  --sidebar-w: 260px;
}

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

html, body {
  height: 100%;
  overflow: auto;
}
body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--cream);
  color: var(--black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== APP LAYOUT ===== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-w);
  background: var(--white);
  border-right: 1px solid var(--gray-200);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 28px 24px 20px;
  text-decoration: none;
  display: block;
}
.sidebar-logo {
  display: block;
  font-family: 'Bebas Neue', 'Arial Narrow', sans-serif;
  font-size: 2.1rem;
  font-weight: 400;
  letter-spacing: 4px;
  color: var(--black);
  line-height: 1;
}
.sidebar-tagline {
  display: block;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--gray-400);
  letter-spacing: 0.5px;
  margin-top: 4px;
}

.sidebar-nav {
  padding: 0 12px;
  flex: 1;
}

.sidebar-section {
  margin-bottom: 8px;
}

.sidebar-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 16px 12px 8px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  color: var(--gray-600);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.15s;
  margin-bottom: 2px;
}

.sidebar-link:hover {
  background: var(--gray-100);
  color: var(--black);
}

.sidebar-link.active {
  background: var(--gray-100);
  color: var(--black);
  font-weight: 600;
}

.sidebar-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  opacity: 0.6;
}

.sidebar-link.active svg,
.sidebar-link:hover svg {
  opacity: 1;
}

.sidebar-link .badge-count {
  margin-left: auto;
  background: var(--gray-100);
  color: var(--gray-600);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
}

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--gray-200);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  min-width: 0;            /* critical: prevents flex child from expanding beyond viewport */
  max-width: calc(100vw - var(--sidebar-w));
  overflow-x: hidden;
  margin-left: var(--sidebar-w);
  padding: 32px 40px;
  background: var(--cream);
  min-height: 100vh;
}

/* ===== UTILITY ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.w-full { width: 100%; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-muted { color: var(--gray-500); }
.grid { display: grid; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ===== TYPOGRAPHY ===== */
h1 { font-size: 1.75rem; font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; font-weight: 600; }
h4 { font-size: 0.95rem; font-weight: 600; }

/* ===== CARDS ===== */
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
  line-height: 1.4;
  font-family: inherit;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--black);
  color: var(--white);
}
.btn-primary:hover:not(:disabled) {
  background: #333;
}

.btn-success {
  background: var(--black);
  color: var(--white);
}
.btn-success:hover:not(:disabled) {
  background: #333;
}

.btn-danger {
  background: var(--white);
  color: var(--danger);
  border: 1px solid var(--gray-200);
}
.btn-danger:hover:not(:disabled) {
  background: #fef2f2;
  border-color: #fecaca;
}

.btn-outline {
  background: var(--white);
  border: 1px solid var(--gray-200);
  color: var(--black);
}
.btn-outline:hover:not(:disabled) {
  background: var(--gray-100);
}

.btn-accent {
  background: var(--black);
  color: var(--white);
}
.btn-accent:hover:not(:disabled) {
  background: #333;
}

.btn-sm { padding: 7px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 0.95rem; }
.btn-icon { padding: 8px 12px; }

/* ===== FORMS ===== */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--black);
}

.form-control,
input[type="text"],
input[type="password"],
input[type="email"],
input[type="url"],
select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.15s;
  background: var(--white);
  font-family: inherit;
  color: var(--black);
}
.form-control:focus,
input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus,
select:focus {
  border-color: var(--black);
}

select.form-control { cursor: pointer; }

textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  resize: vertical;
  background: var(--white);
  color: var(--black);
}
textarea:focus { border-color: var(--black); }

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-blue { background: #e8edf3; color: #374151; }
.badge-green { background: #e8f5e9; color: #166534; }
.badge-yellow { background: #fff8e1; color: #854d0e; }
.badge-red { background: #fce4ec; color: #991b1b; }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }
.badge-purple { background: #f3e8ff; color: #7c3aed; }

/* Confidence badges */
.confidence-high { background: #e8f5e9; color: #166534; font-weight: 700; }
.confidence-medium { background: #fff8e1; color: #854d0e; font-weight: 700; }
.confidence-poor { background: #fce4ec; color: #991b1b; font-weight: 700; }

/* ===== UPLOAD ZONE ===== */
.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius);
  padding: 44px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--white);
}
.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--black);
  background: var(--gray-50);
}
.upload-zone h3 { margin-bottom: 6px; font-size: 1rem; }

/* ===== PROGRESS BAR ===== */
.progress-container { margin-bottom: 16px; }
.progress-bar {
  width: 100%;
  height: 7px;
  background: var(--gray-100);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 6px;
}
.progress-fill {
  height: 100%;
  background: var(--black);
  border-radius: 99px;
  transition: width 0.35s ease;
}
.progress-fill.success { background: var(--success); }
.progress-fill.error   { background: var(--danger); }
.progress-fill.blue    { background: #2563eb; }
.progress-text {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--gray-500);
  margin-top: 4px;
}

/* ===== SESSION CARDS ===== */
.session-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
  transition: all 0.15s;
  gap: 12px;
}
.session-card:hover {
  border-color: var(--gray-300);
}
.session-info { flex: 1; min-width: 0; }
.session-info h4 { font-size: 0.95rem; margin-bottom: 4px; }
.session-meta {
  font-size: 0.8rem;
  color: var(--gray-500);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.session-actions { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }

/* ===== TABLE ===== */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
table th, table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
  font-size: 0.875rem;
}
table th {
  background: var(--gray-50);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ===== MAPPING PAGE ===== */
.mapping-row {
  display: grid;
  grid-template-columns: minmax(120px, 160px) minmax(0, 1fr) 55px;
  gap: 10px;
  align-items: center;
  padding: 7px 0;
  border-bottom: 1px solid var(--gray-100);
  min-width: 0;
}
.mapping-row select {
  font-size: 0.8rem;
  padding: 7px 10px;
  min-width: 0;
  width: 100%;
}
.mapping-label { font-weight: 600; font-size: 0.8rem; }

/* ===== ALERTS ===== */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius-xs);
  margin-bottom: 16px;
  font-size: 0.875rem;
  border: 1px solid;
}
.alert-error, .alert-danger {
  background: #fef2f2;
  color: #991b1b;
  border-color: #fecaca;
}
.alert-success {
  background: #f0fdf4;
  color: #166534;
  border-color: #bbf7d0;
}
.alert-info {
  background: var(--gray-50);
  color: var(--gray-700);
  border-color: var(--gray-200);
}

/* ===== LOGIN PAGE ===== */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--cream);
}
.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--white);
  border-radius: 20px;
  padding: 44px;
  border: 1px solid var(--gray-200);
}
.login-card h1 {
  text-align: center;
  margin-bottom: 8px;
  font-size: 1.6rem;
  letter-spacing: 3px;
}
.login-card .subtitle {
  text-align: center;
  color: var(--gray-500);
  margin-bottom: 28px;
  font-size: 0.875rem;
}

/* ===== STEP INDICATOR ===== */
.steps { display: flex; gap: 0; margin-bottom: 28px; border-radius: var(--radius-xs); overflow: hidden; }
.step {
  flex: 1;
  text-align: center;
  padding: 12px 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--gray-400);
  background: var(--white);
  border-bottom: 3px solid var(--gray-200);
  position: relative;
}
.step.active {
  color: var(--black);
  border-bottom-color: var(--black);
  background: var(--gray-50);
}
.step.done {
  color: var(--success-dark);
  border-bottom-color: var(--success);
  background: #f8fdf8;
}
.step-num {
  display: block;
  font-size: 0.65rem;
  color: var(--gray-400);
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== REVIEW PAGE ===== */
.review-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  grid-template-rows: 1fr;
  flex: 1;
  min-height: 0; /* critical for nested flex/grid scroll */
  overflow: hidden;
}

.review-sidebar {
  background: var(--white);
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: 100%;
  overflow: hidden;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--gray-200);
  flex-shrink: 0;
}

.sidebar-items {
  padding: 8px;
  overflow-y: auto;
  flex: 1 1 0;
  min-height: 0;
  -webkit-overflow-scrolling: touch;
}

.review-main {
  padding: 24px;
  overflow-y: auto;
  min-height: 0;
  background: var(--cream);
}

.sidebar-filters { display: flex; gap: 4px; margin-top: 10px; flex-wrap: wrap; }
.sidebar-filters button {
  padding: 5px 12px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xs);
  background: var(--white);
  font-size: 0.75rem;
  cursor: pointer;
  font-weight: 500;
  font-family: inherit;
  transition: all 0.15s;
  color: var(--gray-600);
}
.sidebar-filters button:hover { background: var(--gray-100); }
.sidebar-filters button.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.stats-bar { font-size: 0.75rem; color: var(--gray-500); margin-top: 10px; }

.review-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s;
  margin-bottom: 4px;
}
.review-item:hover { background: var(--gray-100); }
.review-item.active {
  border-color: var(--black);
  background: var(--gray-50);
}
.review-item img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 8px;
  background: var(--gray-100);
}
.review-item-info { flex: 1; min-width: 0; }
.review-item-info .code {
  font-size: 0.8rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.review-item-info .brand {
  font-size: 0.7rem;
  color: var(--gray-500);
  display: flex;
  align-items: center;
  gap: 4px;
}
.review-item .thumb-placeholder {
  width: 44px;
  height: 44px;
  background: var(--gray-100);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  color: var(--gray-400);
}

.main-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}
.item-detail h3 { font-size: 1.2rem; }
.item-meta { font-size: 0.85rem; color: var(--gray-500); margin-top: 4px; }

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 12px;
}
.image-card {
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
  background: var(--white);
}
.image-card:hover {
  border-color: var(--black);
  transform: translateY(-2px);
}
.image-card.selected {
  border-color: var(--black);
  border-width: 3px;
}
.image-card img {
  width: 100%;
  height: 150px;
  object-fit: contain;
  background: var(--gray-50);
  display: block;
}
.image-card .score {
  position: absolute;
  top: 6px;
  right: 6px;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
}

.selected-preview {
  text-align: center;
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--gray-200);
}
.selected-preview img {
  max-width: 100%;
  max-height: 350px;
  object-fit: contain;
}

.no-image-btn {
  width: 100%;
  padding: 16px;
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius);
  background: var(--white);
  cursor: pointer;
  text-align: center;
  color: var(--gray-500);
  font-size: 0.85rem;
  font-family: inherit;
  transition: all 0.15s;
}
.no-image-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: #fef2f2;
}

/* ===== RADIO CARD ===== */
.radio-card { display: flex; cursor: pointer; flex: 1; min-width: 150px; }
.radio-card input { display: none; }
.radio-card-content {
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm);
  padding: 14px;
  width: 100%;
  transition: all 0.2s;
}
.radio-card-content strong { display: block; margin-bottom: 2px; font-size: 0.9rem; }
.radio-card-content small { color: var(--gray-500); font-size: 0.8rem; }
.radio-card input:checked + .radio-card-content {
  border-color: var(--black);
  background: var(--gray-50);
}

/* ===== BRAND ENTRY ===== */
.brand-entry {
  padding: 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  background: var(--white);
}

/* ===== AI BADGE ===== */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--gray-100);
  color: var(--gray-700);
  padding: 3px 10px;
  border-radius: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

/* ===== CODE ===== */
code {
  background: var(--gray-100);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.8rem;
}

/* ===== MISC ===== */
ol li { margin-bottom: 4px; }
input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--black);
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Download overlay */
.download-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.4);
  z-index: 200;
  align-items: center;
  justify-content: center;
}
.download-overlay.active { display: flex; }
.download-modal {
  background: var(--white);
  border-radius: 16px;
  padding: 36px;
  width: 420px;
  max-width: 90vw;
}

/* ===== REVIEW NAV (top bar for review page) ===== */
.review-nav {
  background: var(--black);
  color: var(--white);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  flex-shrink: 0;
}
.review-nav a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.85rem;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all 0.15s;
}
.review-nav a:hover { color: white; background: rgba(255,255,255,0.1); }
.review-nav-brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 2px;
  color: var(--white) !important;
}

/* ===== MODAL ===== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.35);
  z-index: 300;
  align-items: center;
  justify-content: center;
  animation: modalFadeIn 0.15s ease;
}
.modal-overlay.active { display: flex; }
@keyframes modalFadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-box {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  width: 400px;
  max-width: 90vw;
  animation: modalSlideIn 0.2s ease;
}
@keyframes modalSlideIn { from { transform: translateY(-10px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.modal-message {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: 24px;
}
.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.btn-delete {
  background: var(--danger);
  color: var(--white);
}
.btn-delete:hover { background: #dc2626; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; padding: 20px 16px; }
  .review-layout { grid-template-columns: 1fr; }
  .review-sidebar { max-height: 200px; border-right: none; border-bottom: 1px solid var(--gray-200); }
  .grid-2 { grid-template-columns: 1fr; }
  .session-card { flex-direction: column; align-items: flex-start; }
  .session-actions { width: 100%; justify-content: flex-end; }
}