/* ============================================
   BACKGROUND STUDIO — style.css
   Theme: mykits.shop inspired · Dark · Premium
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
  --bg:          #050505;
  --surface:     #0D0D0D;
  --card:        #111111;
  --card2:       #161616;
  --accent:      #00E676;
  --accent-h:    #00FF88;
  --muted:       #0A5A39;
  --text:        #FFFFFF;
  --text-s:      #9AA0A6;
  --text-xs:     #5A6270;
  --border:      rgba(0,230,118,0.12);
  --border-s:    rgba(0,230,118,0.06);
  --radius:      8px;
  --radius-lg:   12px;
  --font:        'Space Grotesk', sans-serif;
  --mono:        'JetBrains Mono', monospace;
}

html, body { height: 100%; overflow: hidden; background: var(--bg); color: var(--text); font-family: var(--font); }

/* ---- APP GRID ---- */
#app {
  display: grid;
  grid-template-rows: 48px 1fr 28px;
  grid-template-columns: 220px 1fr 260px;
  height: 100vh;
  overflow: hidden;
}

/* ============================================================
   TOP BAR
   ============================================================ */
#topbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 12px;
  z-index: 100;
}

.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; margin-right: 4px; }
.logo-icon {
  width: 28px; height: 28px;
  background: var(--accent);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  color: #050505;
  flex-shrink: 0;
}
.logo-icon svg { width: 16px; height: 16px; }
.logo-text { font-size: 13px; font-weight: 700; letter-spacing: 0.08em; color: var(--text); }
.logo-accent { color: var(--accent); }

.tb-sep { width: 1px; height: 28px; background: var(--border); margin: 0 12px; flex-shrink: 0; }
.tb-spacer { flex: 1; }

.size-input {
  display: flex; align-items: center; gap: 6px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 4px 10px;
}
.size-label { font-size: 10px; color: var(--text-xs); font-family: var(--mono); letter-spacing: 0.05em; }
.size-field {
  background: transparent; border: none; outline: none;
  color: var(--text); font-family: var(--mono); font-size: 12px;
  width: 44px; text-align: center;
}
.size-field::-webkit-inner-spin-button,
.size-field::-webkit-outer-spin-button { -webkit-appearance: none; }
.size-x { color: var(--text-xs); font-size: 11px; }

.tb-btn {
  width: 32px; height: 32px; border: none; background: transparent;
  border-radius: var(--radius); cursor: pointer; color: var(--text-s);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.tb-btn:hover { background: var(--card); color: var(--accent); }
.tb-btn svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.save-status {
  font-size: 9px; font-family: var(--mono); color: var(--text-xs);
  margin-right: 12px; letter-spacing: 0.05em;
  transition: color 0.3s;
}

.export-btn {
  background: var(--accent); color: #050505;
  border: none; border-radius: var(--radius);
  padding: 6px 16px; font-size: 12px; font-weight: 700;
  letter-spacing: 0.08em; cursor: pointer;
  transition: all 0.15s; font-family: var(--font);
}
.export-btn:hover { background: var(--accent-h); transform: translateY(-1px); }

/* ============================================================
   LEFT SIDEBAR
   ============================================================ */
#leftsidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto; overflow-x: hidden;
}
#leftsidebar::-webkit-scrollbar { width: 3px; }
#leftsidebar::-webkit-scrollbar-track { background: transparent; }
#leftsidebar::-webkit-scrollbar-thumb { background: var(--muted); border-radius: 2px; }

.lib-section { padding: 10px 8px 4px; }

.lib-label {
  font-size: 9px; letter-spacing: 0.15em; color: var(--text-xs);
  font-weight: 600; padding: 0 4px 6px;
  display: flex; align-items: center; gap: 6px;
}
.lib-label::after { content: ''; flex: 1; height: 1px; background: var(--border-s); }

.tool-card {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px; border-radius: var(--radius); cursor: pointer;
  transition: all 0.15s; border: 1px solid transparent;
  margin-bottom: 2px;
}
.tool-card:hover { background: var(--card); border-color: var(--border); }
.tool-card.active {
  background: var(--card);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(0,230,118,0.08);
}

.tool-thumb {
  width: 36px; height: 36px; border-radius: 6px;
  overflow: hidden; flex-shrink: 0;
  background: var(--card2);
}
.thumb-canvas { width: 36px; height: 36px; display: block; }

.tool-info { flex: 1; min-width: 0; }
.tool-name { font-size: 11px; font-weight: 600; color: var(--text); line-height: 1.2; }
.tool-desc { font-size: 9px; color: var(--text-xs); line-height: 1.3; margin-top: 1px; }
.tool-badge { font-size: 8px; font-family: var(--mono); color: var(--text-xs); background: var(--card2); border-radius: 3px; padding: 1px 4px; flex-shrink: 0; }

/* ============================================================
   CENTER CANVAS
   ============================================================ */
#center {
  background: #030303;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}

/* Subtle grid bg */
#center::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0,230,118,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,230,118,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.fps-badge {
  position: absolute; top: 12px; left: 12px;
  font-size: 9px; font-family: var(--mono); color: var(--accent);
  background: rgba(0,230,118,0.07); border: 1px solid rgba(0,230,118,0.15);
  border-radius: 4px; padding: 2px 7px;
  display: flex; align-items: center; gap: 5px; z-index: 10;
}
.fps-dot {
  width: 5px; height: 5px; background: var(--accent);
  border-radius: 50%; animation: fpspulse 2s infinite;
}
@keyframes fpspulse { 0%,100%{opacity:1} 50%{opacity:0.25} }

.ref-badge {
  position: absolute; top: 12px; right: 12px;
  font-size: 9px; font-family: var(--mono); color: var(--text-xs);
  background: rgba(13,13,13,0.85); border: 1px solid var(--border);
  border-radius: 4px; padding: 2px 7px; z-index: 10;
}

.canvas-wrap {
  position: relative; border-radius: 16px; overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0,230,118,0.14),
    0 0 60px rgba(0,0,0,0.9),
    0 0 120px rgba(0,230,118,0.03);
  transition: box-shadow 0.3s;
}
.canvas-wrap:hover {
  box-shadow:
    0 0 0 1px rgba(0,230,118,0.25),
    0 0 80px rgba(0,0,0,0.9),
    0 0 160px rgba(0,230,118,0.05);
}

#bgcanvas { display: block; border-radius: 16px; }

.canvas-controls {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 8px;
  background: rgba(13,13,13,0.92); backdrop-filter: blur(12px);
  border: 1px solid var(--border); border-radius: 100px;
  padding: 6px 14px; z-index: 10;
}
.zoom-btn {
  width: 22px; height: 22px; border: none; background: transparent;
  color: var(--text-s); cursor: pointer; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; line-height: 1; transition: color 0.15s;
}
.zoom-btn:hover { color: var(--accent); }
.zoom-pct { font-size: 11px; font-family: var(--mono); color: var(--text); min-width: 36px; text-align: center; }
.ctrl-sep { width: 1px; height: 16px; background: var(--border); }
.preview-btn {
  font-size: 10px; color: var(--text-s); background: transparent;
  border: none; cursor: pointer; padding: 2px 6px;
  border-radius: 4px; transition: color 0.15s;
  font-family: var(--font); letter-spacing: 0.05em;
}
.preview-btn:hover, .preview-btn.active { color: var(--accent); }

/* ============================================================
   RIGHT SIDEBAR
   ============================================================ */
#rightsidebar {
  background: var(--surface);
  border-left: 1px solid var(--border);
  overflow-y: auto; overflow-x: hidden;
  display: flex; flex-direction: column;
}
#rightsidebar::-webkit-scrollbar { width: 3px; }
#rightsidebar::-webkit-scrollbar-thumb { background: var(--muted); }

.panel-section { border-bottom: 1px solid var(--border-s); }
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; cursor: pointer; user-select: none;
  transition: background 0.15s;
}
.panel-header:hover { background: rgba(0,230,118,0.025); }
.panel-label { font-size: 10px; letter-spacing: 0.12em; color: var(--text-xs); font-weight: 600; }
.panel-chevron { font-size: 10px; color: var(--text-xs); transition: transform 0.2s; }
.panel-chevron.open { transform: rotate(0deg); }

.panel-body { padding: 0 12px 12px; }
.panel-body.closed { display: none; }

.sub-label { font-size: 9px; color: var(--text-xs); margin-bottom: 6px; letter-spacing: 0.06em; }

/* COLOR PALETTE */
.color-row { display: flex; align-items: center; gap: 6px; margin-bottom: 12px; flex-wrap: wrap; }
.color-swatch {
  width: 24px; height: 24px; border-radius: 5px;
  border: 1px solid var(--border); cursor: pointer;
  transition: transform 0.15s, border-color 0.15s;
  position: relative;
}
.color-swatch:hover { transform: scale(1.12); }
.color-swatch.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(0,230,118,0.3); }
.add-color-btn {
  width: 24px; height: 24px; border-radius: 5px;
  border: 1px dashed var(--border); background: transparent;
  cursor: pointer; color: var(--text-xs); font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s; line-height: 1;
}
.add-color-btn:hover { border-color: var(--accent); color: var(--accent); }

/* SLIDERS */
.ctrl-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.ctrl-label { font-size: 10px; color: var(--text-s); }
.ctrl-val { font-size: 10px; font-family: var(--mono); color: var(--accent); background: var(--card); border: 1px solid var(--border); border-radius: 4px; padding: 2px 6px; min-width: 38px; text-align: center; }

.slider {
  width: 100%; -webkit-appearance: none; appearance: none;
  height: 3px; border-radius: 2px;
  background: linear-gradient(to right, var(--accent) var(--pct, 50%), var(--card2) var(--pct, 50%));
  outline: none; cursor: pointer; margin-bottom: 2px;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  box-shadow: 0 0 6px rgba(0,230,118,0.45);
  transition: transform 0.1s;
}
.slider::-webkit-slider-thumb:active { transform: scale(1.2); }
.slider::-moz-range-thumb {
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--accent); cursor: pointer; border: none;
}

/* TOGGLE */
.toggle-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.toggle { position: relative; width: 32px; height: 18px; cursor: pointer; }
.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-track {
  position: absolute; inset: 0;
  background: var(--card2); border-radius: 9px; transition: background 0.2s;
}
.toggle-track::before {
  content: ''; position: absolute;
  width: 12px; height: 12px; left: 3px; top: 3px;
  background: var(--text-xs); border-radius: 50%; transition: all 0.2s;
}
.toggle input:checked + .toggle-track { background: var(--muted); }
.toggle input:checked + .toggle-track::before { transform: translateX(14px); background: var(--accent); }

/* LAYERS */
.layer-item {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 8px; background: var(--card);
  border: 1px solid var(--border); border-radius: 6px;
  margin-bottom: 4px; cursor: pointer; transition: border-color 0.15s;
}
.layer-item:hover { border-color: rgba(0,230,118,0.25); }
.layer-item.active { border-color: var(--accent); background: rgba(0,230,118,0.04); }
.layer-icon { font-size: 12px; color: var(--text-xs); }
.layer-name { font-size: 10px; color: var(--text); flex: 1; }
.layer-vis { font-size: 11px; color: var(--text-xs); cursor: pointer; transition: color 0.15s, opacity 0.15s; }
.layer-vis:hover { color: var(--accent); }
.layer-drag { font-size: 11px; color: var(--text-xs); cursor: grab; }
.add-layer-btn {
  width: 100%; margin-top: 6px; padding: 6px;
  background: transparent; border: 1px dashed var(--border);
  border-radius: 6px; color: var(--text-xs); font-size: 10px;
  cursor: pointer; transition: all 0.15s;
  font-family: var(--font); letter-spacing: 0.05em;
}
.add-layer-btn:hover { border-color: var(--accent); color: var(--accent); }

/* PRESETS */
.preset-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; margin-bottom: 8px; }
.preset-btn {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 5px; padding: 5px 6px; font-size: 9px;
  color: var(--text-s); cursor: pointer; text-align: center;
  transition: all 0.15s; font-family: var(--font); letter-spacing: 0.04em;
}
.preset-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(0,230,118,0.04); }
.preset-btn.active { border-color: var(--accent); color: var(--accent); background: rgba(0,230,118,0.08); }

/* QUALITY */
.quality-row { display: flex; align-items: center; gap: 4px; margin-bottom: 8px; }
.q-btn {
  height: 22px; padding: 0 8px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 4px; font-size: 9px; color: var(--text-s);
  cursor: pointer; transition: all 0.15s; font-family: var(--mono);
}
.q-btn.active, .q-btn:hover { border-color: var(--accent); color: var(--accent); }

/* EXPORT INFO */
.exp-info { margin-bottom: 10px; }
.exp-row {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 10px; padding: 3px 0;
  color: var(--text-s);
}
.exp-row span:last-child { font-family: var(--mono); color: var(--text-xs); font-size: 9px; }

/* DOWNLOAD BUTTONS */
.dl-btn {
  width: 100%; padding: 8px; border-radius: var(--radius);
  font-size: 11px; font-weight: 700; cursor: pointer;
  transition: all 0.15s; margin-bottom: 6px;
  letter-spacing: 0.06em; font-family: var(--font); border: none;
}
.dl-png { background: var(--accent); color: #050505; }
.dl-png:hover { background: var(--accent-h); }
.dl-svg { background: transparent; border: 1px solid var(--border); color: var(--text-s); }
.dl-svg:hover { border-color: var(--accent); color: var(--accent); }
.dl-css { background: transparent; border: 1px solid var(--border); color: var(--text-s); }
.dl-css:hover { border-color: var(--accent); color: var(--accent); }

/* ============================================================
   BOTTOM STATUS BAR
   ============================================================ */
#bottombar {
  grid-column: 1 / -1;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 12px; gap: 14px;
}
.status-item { display: flex; align-items: center; gap: 5px; font-size: 9px; font-family: var(--mono); color: var(--text-xs); white-space: nowrap; }
.status-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.status-sep { width: 1px; height: 12px; background: var(--border); flex-shrink: 0; }

/* ============================================================
   RESPONSIVE (MOBILE — stacked layout)
   ============================================================ */
@media (max-width: 768px) {
  #app {
    grid-template-rows: 48px auto 1fr auto 28px;
    grid-template-columns: 1fr;
    height: 100vh;
    overflow-y: auto;
  }
  #topbar { grid-column: 1; overflow-x: auto; }
  #leftsidebar {
    grid-column: 1;
    height: auto; max-height: 180px;
    overflow-x: auto; overflow-y: hidden;
    display: flex; flex-direction: row;
    border-right: none; border-bottom: 1px solid var(--border);
  }
  .lib-section { display: flex; flex-direction: row; gap: 4px; padding: 8px; flex-shrink: 0; }
  .lib-label { display: none; }
  .tool-card { flex-direction: column; align-items: center; padding: 6px; min-width: 64px; width: 64px; }
  .tool-info { display: none; }
  .tool-badge { display: none; }
  #center { grid-column: 1; min-height: 40vh; }
  #rightsidebar { grid-column: 1; max-height: none; }
  #bottombar { grid-column: 1; overflow-x: auto; }
}