/* ========= VARIABLES ========= */
:root {
  --accent: #D6008F;
  --accent-light: #f5e0ed;
  --accent-dark: #a3006d;
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --green: #16a34a;
  --red: #dc2626;
  --transition: 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ========= LAYOUT ========= */
#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* ========= HEADER ========= */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.app-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 0.125rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ========= BACKUP STATUS ========= */
.backup-status {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  padding: 0.375rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
}

.backup-status.saved { color: var(--green); border-color: var(--green); }
.backup-status.saving { color: var(--accent); border-color: var(--accent); }
.backup-status.error { color: var(--red); border-color: var(--red); }

/* ========= BUTTONS ========= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover { box-shadow: 0 4px 12px rgba(214,0,143,0.3); }

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

.btn-outline {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-sm { padding: 0.375rem 0.75rem; font-size: 0.8125rem; }

.btn-icon {
  width: 2rem;
  height: 2rem;
  padding: 0;
  border-radius: 50%;
  font-size: 1rem;
}

/* ========= STATS BAR ========= */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* ========= SEARCH ========= */
.search-bar {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.search-input-wrap {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
}

.search-input-wrap input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  background: var(--surface);
  transition: border-color var(--transition);
  outline: none;
}

.search-input-wrap input:focus { border-color: var(--accent); }

.stock-filter {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.stock-filter input[type="number"] {
  width: 3.5rem;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.25rem;
  font-size: 0.875rem;
  outline: none;
}

.stock-filter input[type="number"]:focus { border-color: var(--accent); }

.checkbox-wrap {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
  font-size: 0.875rem;
}

.checkbox-wrap input[type="checkbox"] { accent-color: var(--accent); }

/* ========= PRODUCT GRID ========= */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-image-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #f3f4f6;
  overflow: hidden;
  cursor: pointer;
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-no-image {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: #d1d5db;
  font-size: 3rem;
}

.card-photo-count {
  position: absolute;
  bottom: 0.5rem;
  right: 0.5rem;
  background: rgba(0,0,0,0.6);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  border-radius: 10px;
}

.card-body { padding: 1rem; }

.card-name {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.card-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.card-margin {
  font-size: 0.875rem;
  font-weight: 600;
}

.card-margin.positive { color: var(--green); }
.card-margin.negative { color: var(--red); }

.card-margin-rate {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-left: 0.25rem;
}

.card-stock {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.badge-low-stock {
  background: #fef2f2;
  color: var(--red);
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.125rem 0.5rem;
  border-radius: 10px;
  margin-left: 0.375rem;
}

.card-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.card-actions .btn { flex: 1; }

/* ========= EMPTY STATE ========= */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-secondary);
}

.empty-hint { font-size: 0.875rem; margin-top: 0.5rem; }

/* ========= MODAL ========= */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
  backdrop-filter: blur(4px);
}

.modal-overlay[hidden] { display: none; }

.modal {
  background: var(--surface);
  border-radius: calc(var(--radius) + 4px);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-sm { max-width: 440px; }

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  line-height: 1;
  padding: 0.25rem;
}

.modal-close:hover { color: var(--text); }

.modal-body { padding: 1.5rem; }

/* ========= FORM ========= */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
  color: var(--text-secondary);
}

.form-group input[type="text"],
.form-group input[type="number"] {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus { border-color: var(--accent); }
.form-group input.invalid { border-color: var(--red); }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

/* ========= DIVERS ROWS ========= */
.divers-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.5rem;
}

.divers-row input[type="text"] {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  outline: none;
}

.divers-row input[type="number"] {
  width: 6rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  outline: none;
}

.divers-row input:focus { border-color: var(--accent); }

.divers-row .btn-remove {
  background: none;
  border: none;
  color: var(--red);
  cursor: pointer;
  font-size: 1.25rem;
  padding: 0.25rem;
  line-height: 1;
}

/* ========= PHOTOS ========= */
.photo-counter {
  font-weight: 400;
  color: var(--text-secondary);
}

.photo-drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: border-color var(--transition), background var(--transition);
}

.photo-drop-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-light);
}

.photo-drop-zone p { margin-bottom: 0.5rem; }

.photo-preview-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.photo-preview-item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--border);
  cursor: grab;
  transition: border-color var(--transition);
}

.photo-preview-item:hover { border-color: var(--accent); }

.photo-preview-item.dragging {
  opacity: 0.4;
}

.photo-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}

.photo-preview-remove {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 20px;
  height: 20px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.photo-preview-badge {
  position: absolute;
  bottom: 2px;
  left: 2px;
  background: var(--accent);
  color: #fff;
  font-size: 0.5625rem;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 4px;
}

/* ========= MARGIN PREVIEW ========= */
.margin-preview-box {
  background: #f9fafb;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  line-height: 1.8;
}

.margin-label { color: var(--text-secondary); }

/* ========= VIEWER ========= */
.viewer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.viewer-overlay[hidden] { display: none; }

.viewer-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  z-index: 10;
}

.viewer-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.15);
  border: none;
  color: #fff;
  font-size: 2.5rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  z-index: 10;
}

.viewer-nav:hover { background: rgba(255,255,255,0.3); }

.viewer-prev { left: 1rem; }
.viewer-next { right: 1rem; }

.viewer-image {
  max-width: 90%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.viewer-bottom {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
}

.viewer-counter { color: rgba(255,255,255,0.7); font-size: 0.875rem; }

.viewer-download { color: #fff; border-color: rgba(255,255,255,0.3); }
.viewer-download:hover { border-color: #fff; }

/* ========= BACKUP MODAL ========= */
.backup-info {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.backup-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0.5rem 0;
}

.backup-fallback-title {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ========= RESPONSIVE ========= */
@media (max-width: 768px) {
  .app-header { flex-direction: column; align-items: flex-start; }
  .header-right { width: 100%; justify-content: flex-start; }
  .stats-bar { grid-template-columns: 1fr; }
  .stat-card { flex-direction: row; justify-content: space-between; align-items: center; }
  .search-bar { flex-direction: column; }
  .product-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ========= REDUCED MOTION ========= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}