/* ═══════════════════════════════════════════════════════════════
   PIXEL STUDIO – Styles
   Aesthetic: Playful toy-like, bright, rounded, kid-safe
   ═══════════════════════════════════════════════════════════════ */

/* ─── CSS Variables ─── */
:root {
  --clr-sky:       #e8f4fd;
  --clr-cloud:    #ffffff;
  --clr-toolbar:  #6c5ce7;
  --clr-toolbar2: #a29bfe;
  --clr-accent:   #fd9644;
  --clr-accent2:  #feca57;
  --clr-panel-bg: #f0f4ff;
  --clr-panel-border: #d5d8ef;
  --clr-text:     #2d3436;
  --clr-text-light: #636e72;
  --clr-green:    #00b894;
  --clr-red:      #e74c3c;
  --clr-layer-active: #6c5ce7;
  --radius-sm:    8px;
  --radius-md:    14px;
  --radius-lg:    20px;
  --radius-xl:    28px;
  --shadow-sm:    0 2px 6px rgba(0,0,0,.12);
  --shadow-md:    0 4px 14px rgba(0,0,0,.14);
  --shadow-lg:    0 6px 24px rgba(0,0,0,.16);
  --font-main:    'Segoe UI', 'Comic Sans MS', cursive, sans-serif;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  background: var(--clr-sky);
  font-family: var(--font-main);
  color: var(--clr-text);
}

/* ─── Toolbar ─── */
#toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: linear-gradient(135deg, var(--clr-toolbar), var(--clr-toolbar2));
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 10;
  flex-wrap: wrap;
  min-height: 58px;
}

.toolbar-brand {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-right: 8px;
}
.brand-icon { font-size: 22px; }
.brand-name {
  font-size: 17px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 3px rgba(0,0,0,.25);
}

/* Tool buttons */
.toolbar-tools, .toolbar-actions, .toolbar-extra {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tool-btn, .action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  min-width: 56px;
  height: 46px;
  padding: 4px 6px;
  border: 2px solid rgba(255,255,255,.25);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,.15);
  color: #fff;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s, transform .1s, border-color .15s, box-shadow .15s;
  -webkit-tap-highlight-color: transparent;
}
.tool-btn:hover, .action-btn:hover {
  background: rgba(255,255,255,.3);
  border-color: rgba(255,255,255,.5);
}
.tool-btn:active, .action-btn:active {
  transform: scale(.93);
}
.tool-btn.active {
  background: rgba(255,255,255,.42);
  border-color: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.tool-btn:disabled, .action-btn:disabled {
  opacity: .35;
  cursor: not-allowed;
  transform: none;
}
.tool-icon { font-size: 18px; line-height: 1; }
.tool-label, .action-label { font-size: 9px; font-weight: 700; letter-spacing: 0.3px; }
.action-icon { font-size: 17px; line-height: 1; }

/* Grid dropdown */
.dropdown {
  position: absolute;
  top: 54px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  overflow: hidden;
  min-width: 140px;
  border: 2px solid var(--clr-panel-border);
}
.dropdown.hidden { display: none; }
.dropdown-item {
  display: block;
  width: 100%;
  padding: 11px 20px;
  border: none;
  background: none;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  color: var(--clr-text);
  cursor: pointer;
  text-align: left;
  transition: background .12s;
}
.dropdown-item:hover { background: #eef1ff; }

/* ─── Main Layout ─── */
#main-layout {
  display: flex;
  height: calc(100% - 58px - 34px);
  overflow: hidden;
}

/* Side panels */
.side-panel {
  width: 160px;
  min-width: 140px;
  background: var(--clr-panel-bg);
  border-right: 2px solid var(--clr-panel-border);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 6px;
}
#layers-panel { border-right: none; border-left: 2px solid var(--clr-panel-border); }

.panel-section { margin-bottom: 4px; }
.panel-title {
  font-size: 13px;
  font-weight: 800;
  color: var(--clr-toolbar);
  margin-bottom: 8px;
  padding-left: 4px;
  letter-spacing: 0.3px;
}

/* ─── Palette ─── */
.palette-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.palette-tab {
  flex: 1;
  min-width: 0;
  padding: 5px 2px;
  border: 2px solid var(--clr-panel-border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-family: inherit;
  font-size: 10px;
  font-weight: 700;
  color: var(--clr-text-light);
  cursor: pointer;
  text-align: center;
  transition: all .13s;
  -webkit-tap-highlight-color: transparent;
}
.palette-tab:hover { border-color: var(--clr-toolbar2); color: var(--clr-toolbar); }
.palette-tab.active {
  background: var(--clr-toolbar);
  color: #fff;
  border-color: var(--clr-toolbar);
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  padding: 2px;
}
.color-swatch {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  border: 3px solid transparent;
  cursor: pointer;
  transition: transform .1s, border-color .12s, box-shadow .12s;
  box-shadow: inset 0 0 0 2px rgba(0,0,0,.08);
  -webkit-tap-highlight-color: transparent;
}
.color-swatch:hover {
  transform: scale(1.12);
  border-color: rgba(0,0,0,.25);
}
.color-swatch.selected {
  border-color: var(--clr-toolbar);
  box-shadow: 0 0 0 3px var(--clr-toolbar2), inset 0 0 0 2px rgba(0,0,0,.08);
  transform: scale(1.08);
}

/* Current color */
.current-color-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  padding: 6px 8px;
  background: #fff;
  border-radius: var(--radius-md);
  border: 2px solid var(--clr-panel-border);
}
.current-color-label { font-size: 11px; font-weight: 700; color: var(--clr-text-light); }
.current-color-swatch {
  width: 28px; height: 28px;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(0,0,0,.15);
  background: #000;
}

/* ─── Canvas Viewport ─── */
#canvas-viewport {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle, rgba(108,92,231,.04) 1px, transparent 1px);
  background-size: 24px 24px;
}

#canvas-scroll-area {
  flex: 1;
  width: 100%;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#canvas-container {
  position: relative;
  /* size set by JS */
  border-radius: 4px;
  box-shadow: var(--shadow-lg), 0 0 0 3px rgba(108,92,231,.18);
}

.pixel-canvas {
  position: absolute;
  top: 0; left: 0;
  image-rendering: pixelated;
  image-rendering: -moz-crisp-edges;
  image-rendering: crisp-edges;
}
#canvas-overlay {
  position: relative; /* keeps container sized */
  cursor: crosshair;
  touch-action: none;
}

/* Zoom controls */
.zoom-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: absolute;
  bottom: 14px;
  right: 18px;
  z-index: 5;
}
.zoom-btn {
  width: 34px; height: 34px;
  border: 2px solid var(--clr-panel-border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 18px;
  font-weight: 700;
  color: var(--clr-toolbar);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .12s, transform .1s;
  -webkit-tap-highlight-color: transparent;
}
.zoom-btn:hover { background: #eef1ff; }
.zoom-btn:active { transform: scale(.92); }
.zoom-fit { font-size: 14px; }
.zoom-level {
  font-size: 12px;
  font-weight: 800;
  color: var(--clr-text);
  min-width: 40px;
  text-align: center;
}

/* ─── Layers ─── */
.layers-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.layer-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 8px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  background: #fff;
  cursor: pointer;
  transition: border-color .13s, background .13s, box-shadow .13s;
  -webkit-tap-highlight-color: transparent;
}
.layer-item:hover { border-color: var(--clr-panel-border); }
.layer-item.active {
  border-color: var(--clr-layer-active);
  background: #f0eeff;
  box-shadow: var(--shadow-sm);
}
.layer-thumb {
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--clr-panel-border);
  background: #fff;
  image-rendering: pixelated;
  flex-shrink: 0;
}
.layer-info { flex: 1; min-width: 0; }
.layer-name { font-size: 12px; font-weight: 700; color: var(--clr-text); }
.layer-sub { font-size: 9px; color: var(--clr-text-light); }
.layer-actions { display: flex; gap: 3px; }
.layer-action-btn {
  width: 26px; height: 26px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  font-size: 13px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .12s;
  -webkit-tap-highlight-color: transparent;
  color: var(--clr-text-light);
}
.layer-action-btn:hover { background: rgba(108,92,231,.1); color: var(--clr-toolbar); }

/* ─── Status Bar ─── */
#status-bar {
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  background: linear-gradient(135deg, var(--clr-toolbar), var(--clr-toolbar2));
  color: rgba(255,255,255,.88);
  font-size: 12px;
  font-weight: 600;
}
#status-save { font-size: 11px; opacity: .75; }

/* ─── Modals ─── */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  animation: modal-fade-in .18s ease;
}
.modal.hidden { display: none; }
@keyframes modal-fade-in { from { opacity: 0; } to { opacity: 1; } }

.modal-content {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 28px 26px 22px;
  box-shadow: var(--shadow-lg);
  max-width: 420px;
  width: 90%;
  animation: modal-pop .22s cubic-bezier(.34,1.56,.64,1);
}
@keyframes modal-pop { from { transform: scale(.85); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.modal-title { font-size: 19px; font-weight: 800; margin-bottom: 6px; color: var(--clr-text); }
.modal-desc { font-size: 13px; color: var(--clr-text-light); margin-bottom: 14px; }

.modal-preview-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 18px;
  background: #f5f5f5;
  border-radius: var(--radius-md);
  padding: 14px;
  border: 2px solid var(--clr-panel-border);
  max-height: 280px;
  overflow: auto;
}
#import-preview-canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  max-width: 100%;
  max-height: 240px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}
.modal-btn {
  padding: 10px 22px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: transform .1s, box-shadow .12s;
  -webkit-tap-highlight-color: transparent;
}
.modal-btn:active { transform: scale(.95); }
.modal-btn-cancel {
  background: #f0f0f0;
  color: var(--clr-text-light);
  border-color: #ddd;
}
.modal-btn-cancel:hover { background: #e4e4e4; }
.modal-btn-ok {
  background: var(--clr-green);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.modal-btn-ok:hover { background: #00a381; box-shadow: var(--shadow-md); }

/* ─── Responsive / Tablet ─── */
@media (max-width: 680px) {
  .side-panel { width: 120px; min-width: 110px; padding: 6px 4px; }
  .brand-name { display: none; }
  .tool-label, .action-label { display: none; }
  .tool-btn, .action-btn { min-width: 42px; height: 40px; }
  .palette-grid { grid-template-columns: repeat(4, 1fr); gap: 4px; }
  .layer-name { font-size: 11px; }
  .layer-sub { display: none; }
  .layer-info { min-width: 0; }
}
@media (max-width: 460px) {
  #main-layout { flex-direction: column; }
  .side-panel { width: 100%; min-width: unset; flex-direction: row; overflow-x: auto; padding: 6px 8px; border: none; border-bottom: 2px solid var(--clr-panel-border); }
  #layers-panel { border-left: none; border-top: 2px solid var(--clr-panel-border); order: 1; }
  .panel-section { display: flex; gap: 10px; align-items: flex-start; }
  .layers-list { flex-direction: row; }
  .layer-item { flex-shrink: 0; }
  #canvas-viewport { order: 0; flex: 1; }
}