/* =========================================================
   KBN Design Studio — studio.css
   Mobile-first, touch-optimised, KBN Green theme
   ========================================================= */

/* ---------- CSS Custom Properties (Light) ---------- */
:root {
  --kbn-green:        #1DB954;
  --kbn-green-dark:   #17a347;
  --kbn-green-light:  #d4f5e2;
  --kbn-bg:           #f5f6f7;
  --kbn-surface:      #ffffff;
  --kbn-surface-2:    #f0f1f3;
  --kbn-border:       #dde0e4;
  --kbn-text:         #1a1a2e;
  --kbn-text-muted:   #6b7280;
  --kbn-danger:       #ef4444;
  --kbn-warning:      #f59e0b;
  --kbn-info:         #3b82f6;
  --kbn-shadow:       0 2px 12px rgba(0,0,0,.08);
  --kbn-shadow-lg:    0 8px 32px rgba(0,0,0,.14);
  --kbn-radius:       10px;
  --kbn-radius-sm:    6px;
  --kbn-radius-lg:    16px;
  --kbn-tab-h:        52px;
  --kbn-toolbar-h:    56px;
  --kbn-panel-w:      300px;
  --kbn-font:         'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --kbn-transition:   0.18s ease;
}

/* ---------- Dark Mode ---------- */
[data-kbn-theme="dark"] {
  --kbn-bg:          #111318;
  --kbn-surface:     #1c1f26;
  --kbn-surface-2:   #252830;
  --kbn-border:      #2e3240;
  --kbn-text:        #e8eaf0;
  --kbn-text-muted:  #8b92a4;
  --kbn-shadow:      0 2px 12px rgba(0,0,0,.35);
  --kbn-shadow-lg:   0 8px 32px rgba(0,0,0,.55);
}

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

.kbn-studio {
  font-family: var(--kbn-font);
  color: var(--kbn-text);
  background: var(--kbn-bg);
  width: 100%;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* =========================================================
   TOP TOOLBAR
   ========================================================= */
.kbn-toolbar {
  height: var(--kbn-toolbar-h);
  background: var(--kbn-surface);
  border-bottom: 1px solid var(--kbn-border);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  flex-shrink: 0;
  box-shadow: var(--kbn-shadow);
  z-index: 100;
  position: relative;
}

.kbn-toolbar__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 16px;
  color: var(--kbn-green);
  text-decoration: none;
  flex-shrink: 0;
}

.kbn-toolbar__logo svg { width: 28px; height: 28px; }

.kbn-toolbar__title {
  flex: 1;
  min-width: 0;
}

.kbn-toolbar__title input {
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  color: var(--kbn-text);
  width: 100%;
  outline: none;
  padding: 4px 8px;
  border-radius: var(--kbn-radius-sm);
  transition: background var(--kbn-transition);
}
.kbn-toolbar__title input:focus { background: var(--kbn-surface-2); }

.kbn-toolbar__actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

/* =========================================================
   MAIN LAYOUT
   ========================================================= */
.kbn-main {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

/* =========================================================
   SIDE PANEL (Tabs)
   ========================================================= */
.kbn-panel {
  width: var(--kbn-panel-w);
  background: var(--kbn-surface);
  border-right: 1px solid var(--kbn-border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  transition: transform var(--kbn-transition);
  z-index: 50;
}

/* Tab Navigation */
.kbn-tabs {
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--kbn-border);
  flex-shrink: 0;
}
.kbn-tabs::-webkit-scrollbar { display: none; }

.kbn-tab-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 10px;
  font-size: 10px;
  font-weight: 600;
  color: var(--kbn-text-muted);
  border: none;
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color var(--kbn-transition), border-color var(--kbn-transition);
  flex-shrink: 0;
}
.kbn-tab-btn svg, .kbn-tab-btn .kbn-icon {
  width: 20px; height: 20px; font-size: 18px;
}
.kbn-tab-btn.active,
.kbn-tab-btn:hover {
  color: var(--kbn-green);
  border-bottom-color: var(--kbn-green);
}

/* Tab Panes */
.kbn-tab-pane { display: none; flex: 1; overflow-y: auto; padding: 14px; }
.kbn-tab-pane.active { display: flex; flex-direction: column; gap: 12px; }

/* =========================================================
   CANVAS AREA
   ========================================================= */
.kbn-canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  background: var(--kbn-bg);
  overflow: auto;
  position: relative;
  padding: 20px;
}

.kbn-canvas-wrapper {
  position: relative;
  box-shadow: var(--kbn-shadow-lg);
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
  touch-action: none;
}

#kbn-canvas {
  display: block;
  touch-action: none;
  cursor: default;
}

/* Canvas Zoom Controls */
.kbn-zoom-ctrl {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 20;
}

/* =========================================================
   BUTTONS
   ========================================================= */
.kbn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: var(--kbn-radius-sm);
  cursor: pointer;
  font-family: var(--kbn-font);
  font-weight: 600;
  font-size: 13px;
  padding: 8px 14px;
  transition: background var(--kbn-transition), transform var(--kbn-transition), box-shadow var(--kbn-transition);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.kbn-btn:active { transform: scale(0.97); }

.kbn-btn--primary {
  background: var(--kbn-green);
  color: #fff;
}
.kbn-btn--primary:hover { background: var(--kbn-green-dark); }

.kbn-btn--secondary {
  background: var(--kbn-surface-2);
  color: var(--kbn-text);
  border: 1px solid var(--kbn-border);
}
.kbn-btn--secondary:hover { background: var(--kbn-border); }

.kbn-btn--danger {
  background: var(--kbn-danger);
  color: #fff;
}
.kbn-btn--icon {
  padding: 8px;
  background: var(--kbn-surface-2);
  color: var(--kbn-text);
  border: 1px solid var(--kbn-border);
  border-radius: var(--kbn-radius-sm);
  width: 36px; height: 36px;
}
.kbn-btn--icon:hover { background: var(--kbn-green-light); color: var(--kbn-green); }
.kbn-btn--sm { padding: 5px 10px; font-size: 12px; }
.kbn-btn--full { width: 100%; }

/* =========================================================
   FORM ELEMENTS
   ========================================================= */
.kbn-field { display: flex; flex-direction: column; gap: 5px; }
.kbn-field label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--kbn-text-muted);
}
.kbn-input, .kbn-select {
  background: var(--kbn-surface-2);
  border: 1px solid var(--kbn-border);
  border-radius: var(--kbn-radius-sm);
  color: var(--kbn-text);
  font-family: var(--kbn-font);
  font-size: 13px;
  padding: 8px 10px;
  outline: none;
  transition: border-color var(--kbn-transition);
  width: 100%;
}
.kbn-input:focus, .kbn-select:focus { border-color: var(--kbn-green); }

.kbn-range {
  width: 100%;
  accent-color: var(--kbn-green);
  cursor: pointer;
}

.kbn-color-input {
  width: 40px; height: 36px;
  padding: 2px;
  border: 1px solid var(--kbn-border);
  border-radius: var(--kbn-radius-sm);
  cursor: pointer;
  background: none;
}

/* =========================================================
   GRID OF SELECTABLE ITEMS (sizes, shapes, layouts, etc.)
   ========================================================= */
.kbn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 8px;
}

.kbn-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 6px;
  background: var(--kbn-surface-2);
  border: 2px solid transparent;
  border-radius: var(--kbn-radius);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  color: var(--kbn-text-muted);
  text-align: center;
  transition: border-color var(--kbn-transition), background var(--kbn-transition);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.kbn-card:hover, .kbn-card.active {
  border-color: var(--kbn-green);
  background: var(--kbn-green-light);
  color: var(--kbn-green);
}
.kbn-card .kbn-icon { font-size: 22px; line-height: 1; }

/* =========================================================
   SIZE PREVIEW
   ========================================================= */
.kbn-size-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--kbn-surface-2);
  border: 1px dashed var(--kbn-border);
  border-radius: var(--kbn-radius);
  padding: 12px;
  min-height: 80px;
}
.kbn-size-thumb {
  background: var(--kbn-green-light);
  border: 2px solid var(--kbn-green);
  transition: all var(--kbn-transition);
}

/* =========================================================
   IMAGE IMPORT DROPZONE
   ========================================================= */
.kbn-dropzone {
  border: 2px dashed var(--kbn-border);
  border-radius: var(--kbn-radius);
  padding: 30px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--kbn-transition), background var(--kbn-transition);
  color: var(--kbn-text-muted);
}
.kbn-dropzone:hover, .kbn-dropzone.drag-over {
  border-color: var(--kbn-green);
  background: var(--kbn-green-light);
  color: var(--kbn-green);
}
.kbn-dropzone svg { width: 40px; height: 40px; margin-bottom: 8px; opacity: 0.5; }
.kbn-dropzone p { font-size: 13px; }

/* Uploaded image grid */
.kbn-img-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.kbn-img-thumb {
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--kbn-radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color var(--kbn-transition), transform var(--kbn-transition);
}
.kbn-img-thumb:hover { border-color: var(--kbn-green); transform: scale(1.03); }

/* =========================================================
   SLIDER ROW
   ========================================================= */
.kbn-slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.kbn-slider-row label { font-size: 11px; font-weight: 700; color: var(--kbn-text-muted); width: 70px; flex-shrink: 0; }
.kbn-slider-row input[type=range] { flex: 1; }
.kbn-slider-row .kbn-val { font-size: 12px; width: 32px; text-align: right; color: var(--kbn-text-muted); }

/* =========================================================
   SECTION HEADER
   ========================================================= */
.kbn-section-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--kbn-text-muted);
  margin-top: 8px;
}

.kbn-divider {
  height: 1px;
  background: var(--kbn-border);
  margin: 6px 0;
}

/* =========================================================
   MODAL
   ========================================================= */
.kbn-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.kbn-modal {
  background: var(--kbn-surface);
  border-radius: var(--kbn-radius-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90svh;
  overflow-y: auto;
  box-shadow: var(--kbn-shadow-lg);
  padding: 24px;
}
.kbn-modal__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.kbn-modal__title { font-size: 17px; font-weight: 700; }
.kbn-modal__close { background: none; border: none; cursor: pointer; font-size: 22px; color: var(--kbn-text-muted); }
.kbn-modal__footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* =========================================================
   TOAST NOTIFICATIONS
   ========================================================= */
.kbn-toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.kbn-toast {
  background: var(--kbn-text);
  color: var(--kbn-bg);
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--kbn-shadow-lg);
  pointer-events: all;
  animation: kbn-slide-up 0.22s ease forwards;
}
.kbn-toast--success { background: var(--kbn-green); color: #fff; }
.kbn-toast--error   { background: var(--kbn-danger); color: #fff; }
.kbn-toast--warning { background: var(--kbn-warning); color: #fff; }

@keyframes kbn-slide-up {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =========================================================
   PROGRESS BAR
   ========================================================= */
.kbn-progress-bar {
  height: 3px;
  background: var(--kbn-green-light);
  border-radius: 2px;
  overflow: hidden;
}
.kbn-progress-bar__fill {
  height: 100%;
  background: var(--kbn-green);
  border-radius: 2px;
  transition: width 0.3s ease;
}

/* =========================================================
   COLLAGE LAYOUTS PANEL
   ========================================================= */
.kbn-layout-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.kbn-layout-thumb {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--kbn-surface-2);
  border: 2px solid transparent;
  border-radius: var(--kbn-radius);
  cursor: pointer;
  font-size: 10px;
  font-weight: 700;
  color: var(--kbn-text-muted);
  flex-direction: column;
  gap: 4px;
  transition: border-color var(--kbn-transition), background var(--kbn-transition);
}
.kbn-layout-thumb:hover, .kbn-layout-thumb.active {
  border-color: var(--kbn-green);
  background: var(--kbn-green-light);
  color: var(--kbn-green);
}
.kbn-layout-thumb svg { width: 36px; height: 36px; }

/* =========================================================
   FONT PICKER
   ========================================================= */
.kbn-font-list {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--kbn-border);
  border-radius: var(--kbn-radius-sm);
}
.kbn-font-item {
  display: flex;
  align-items: center;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 13px;
  transition: background var(--kbn-transition);
  gap: 8px;
}
.kbn-font-item:hover { background: var(--kbn-surface-2); }
.kbn-font-item.active {
  background: var(--kbn-green-light);
  color: var(--kbn-green);
  font-weight: 700;
}
.kbn-font-item .badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 5px;
  border-radius: 4px;
  background: var(--kbn-green-light);
  color: var(--kbn-green);
  margin-left: auto;
}

/* =========================================================
   OBJECT PROPERTIES PANEL (right panel on desktop)
   ========================================================= */
.kbn-props-panel {
  width: 240px;
  background: var(--kbn-surface);
  border-left: 1px solid var(--kbn-border);
  display: flex;
  flex-direction: column;
  padding: 14px;
  gap: 12px;
  flex-shrink: 0;
  overflow-y: auto;
}
.kbn-props-panel h4 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--kbn-text-muted);
}

/* =========================================================
   STATUS BAR
   ========================================================= */
.kbn-statusbar {
  height: 28px;
  background: var(--kbn-surface);
  border-top: 1px solid var(--kbn-border);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 16px;
  font-size: 11px;
  color: var(--kbn-text-muted);
  flex-shrink: 0;
}
.kbn-statusbar span { display: flex; align-items: center; gap: 4px; }
#kbn-save-status { color: var(--kbn-green); }

/* =========================================================
   ORDER MODAL
   ========================================================= */
.kbn-order-summary {
  background: var(--kbn-surface-2);
  border-radius: var(--kbn-radius);
  padding: 14px;
  margin-bottom: 16px;
}
.kbn-order-summary img {
  width: 100%;
  height: 180px;
  object-fit: contain;
  border-radius: var(--kbn-radius-sm);
  margin-bottom: 10px;
}
.kbn-order-row { display: flex; justify-content: space-between; font-size: 13px; padding: 4px 0; }
.kbn-order-total { font-weight: 700; font-size: 16px; color: var(--kbn-green); }

/* =========================================================
   RESPONSIVE — Mobile Panel as Drawer
   ========================================================= */
@media (max-width: 768px) {
  :root { --kbn-panel-w: 100%; }

  .kbn-main { flex-direction: column; }

  .kbn-panel {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--kbn-border);
    height: auto;
    max-height: 40svh;
  }

  .kbn-props-panel { display: none; }   /* hidden on mobile; use inline controls */

  .kbn-canvas-area { padding: 12px; }

  .kbn-toolbar__logo span { display: none; }
}

@media (min-width: 769px) and (max-width: 1100px) {
  :root { --kbn-panel-w: 260px; }
  .kbn-props-panel { width: 200px; }
}

/* =========================================================
   UTILITY
   ========================================================= */
.kbn-hidden   { display: none !important; }
.kbn-flex     { display: flex; }
.kbn-flex-col { flex-direction: column; }
.kbn-gap-8    { gap: 8px; }
.kbn-gap-12   { gap: 12px; }
.kbn-mt-8     { margin-top: 8px; }
.kbn-w-full   { width: 100%; }
.kbn-text-sm  { font-size: 12px; }
.kbn-text-green { color: var(--kbn-green); }
.kbn-text-muted { color: var(--kbn-text-muted); }
.kbn-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 7px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 700;
}
.kbn-badge--green { background: var(--kbn-green-light); color: var(--kbn-green); }
.kbn-badge--gray  { background: var(--kbn-surface-2);   color: var(--kbn-text-muted); }
.kbn-badge--red   { background: #fee2e2; color: var(--kbn-danger); }

/* Scrollbar styling */
.kbn-studio ::-webkit-scrollbar { width: 4px; height: 4px; }
.kbn-studio ::-webkit-scrollbar-track { background: transparent; }
.kbn-studio ::-webkit-scrollbar-thumb {
  background: var(--kbn-border);
  border-radius: 4px;
}
.kbn-studio ::-webkit-scrollbar-thumb:hover { background: var(--kbn-text-muted); }