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

:root {
  --bg:       #080810;
  --surf:     #0f0f1c;
  --surf2:    #181828;
  --border:   #252538;
  --accent:   #7c3aed;
  --accent2:  #06b6d4;
  --danger:   #ef4444;
  --success:  #22c55e;
  --text:     #dde1f0;
  --muted:    #5a607a;
  --canvas-bg:#090914;
  --font:     'Segoe UI', system-ui, sans-serif;
  --mono:     'Consolas', 'Courier New', monospace;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-size: 13px;
}

/* ── Header ───────────────────────────────────────────────────────────────── */
header {
  height: 52px;
  background: var(--surf);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 14px;
  flex-shrink: 0;
  z-index: 50;
}

.logo {
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 1px;
  background: linear-gradient(120deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.header-mid {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.select-input, .num-input {
  background: var(--surf2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--mono);
  outline: none;
  transition: border-color .15s;
}
.select-input:focus, .num-input:focus { border-color: var(--accent); }
.num-input { width: 70px; }

.btn-sm {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 5px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  transition: opacity .15s;
}
.btn-sm:hover { opacity: .85; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--accent2);
  padding: 5px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  transition: all .15s;
}
.btn-ghost:hover { border-color: var(--accent2); background: rgba(6,182,212,.08); }

.conn-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--muted);
  font-family: var(--mono);
}
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--danger);
  transition: background .3s, box-shadow .3s;
}
.dot.on { background: var(--success); box-shadow: 0 0 8px var(--success); }

/* ── Main Layout ──────────────────────────────────────────────────────────── */
main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── Left Sidebar ─────────────────────────────────────────────────────────── */
.sidebar-left {
  width: 220px;
  background: var(--surf);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.panel-header {
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.btn-danger-sm {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--danger);
  padding: 2px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 11px;
  transition: all .15s;
}
.btn-danger-sm:hover { background: rgba(239,68,68,.1); border-color: var(--danger); }

.layers-list {
  list-style: none;
  flex: 1;
  overflow-y: auto;
  padding: 6px;
}
.layers-list::-webkit-scrollbar { width: 4px; }
.layers-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.empty-state {
  text-align: center;
  padding: 32px 12px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.layer-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .12s;
  margin-bottom: 2px;
}
.layer-item:hover { background: var(--surf2); }
.layer-item.selected { background: rgba(124,58,237,.15); border-color: rgba(124,58,237,.5); }
.layer-item.hidden { opacity: .4; }

.layer-thumb {
  width: 32px; height: 32px;
  object-fit: cover;
  border-radius: 3px;
  background: var(--surf2);
  flex-shrink: 0;
}

.layer-info { flex: 1; min-width: 0; }
.layer-name {
  font-size: 12px;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.layer-meta {
  font-size: 10px;
  color: var(--muted);
  font-family: var(--mono);
}

.layer-del {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
  padding: 2px 4px;
  border-radius: 3px;
  transition: all .12s;
  flex-shrink: 0;
}
.layer-del:hover { color: var(--danger); background: rgba(239,68,68,.1); }

/* ── Canvas ───────────────────────────────────────────────────────────────── */
.canvas-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: #04040c;
}

.canvas-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--surf);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.tbtn {
  background: var(--surf2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 10px;
  border-radius: 5px;
  font-size: 12px;
  cursor: pointer;
  transition: all .12s;
  white-space: nowrap;
}
.tbtn:hover { border-color: var(--accent); color: var(--accent); }
.tbtn:disabled { opacity: .35; cursor: not-allowed; }

.zoom-val {
  font-size: 11px;
  font-family: var(--mono);
  color: var(--muted);
  min-width: 42px;
  text-align: center;
}
.tb-sep { flex: 1; }

.canvas-viewport {
  flex: 1;
  overflow: hidden;
  position: relative;
  background-color: var(--canvas-bg);
  background-image:
    linear-gradient(rgba(124,58,237,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,58,237,.04) 1px, transparent 1px);
  background-size: 80px 45px;
}
.canvas-viewport::-webkit-scrollbar { width: 6px; height: 6px; }
.canvas-viewport::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.canvas-board {
  position: absolute;
  top: 0; left: 0;
  background: rgba(0,0,0,0.3);
  box-shadow: 0 0 0 2px var(--accent), 0 24px 80px rgba(0,0,0,.7);
  transform-origin: top left;
  overflow: visible;
  z-index: 1;
}



/* ── Canvas Items ─────────────────────────────────────────────────────────── */
.c-item {
  position: absolute;
  cursor: move;
  user-select: none;
  border: 1px solid transparent;
  transition: border-color .1s, opacity .15s;
}
.c-item:hover { border-color: rgba(124,58,237,.4); }
.c-item.selected { border-color: var(--accent); }
.c-item.locked { cursor: not-allowed; }

.c-item.hidden-item {
  opacity: 0.35 !important;
  border: 1px dashed var(--danger);
}
.c-item.hidden-item:hover { border-style: solid; border-color: var(--danger); }
.c-item.hidden-item.selected { border: 2px dashed var(--danger); }

.c-item img,
.c-item video {
  width: 100%;
  height: 100%;
  object-fit: fill;
  display: block;
  pointer-events: none;
}

/* Resize handles */
.rh {
  position: absolute;
  width: 9px; height: 9px;
  background: #fff;
  border: 2px solid var(--accent);
  border-radius: 2px;
  z-index: 1000;
  display: none;
}
.c-item.selected .rh { display: block; }

.rh.nw { top:-5px; left:-5px; cursor:nw-resize; }
.rh.n  { top:-5px; left:calc(50% - 4px); cursor:n-resize; }
.rh.ne { top:-5px; right:-5px; cursor:ne-resize; }
.rh.e  { top:calc(50% - 4px); right:-5px; cursor:e-resize; }
.rh.se { bottom:-5px; right:-5px; cursor:se-resize; }
.rh.s  { bottom:-5px; left:calc(50% - 4px); cursor:s-resize; }
.rh.sw { bottom:-5px; left:-5px; cursor:sw-resize; }
.rh.w  { top:calc(50% - 4px); left:-5px; cursor:w-resize; }

/* ── Right Properties Panel ───────────────────────────────────────────────── */
.sidebar-right {
  width: 240px;
  background: var(--surf);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  flex-shrink: 0;
}
.sidebar-right::-webkit-scrollbar { width: 4px; }
.sidebar-right::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.no-selection {
  padding: 24px 16px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
  text-align: center;
}

.prop-group {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.prop-group > label:first-child {
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

.prop-row {
  display: grid;
  grid-template-columns: 16px 1fr 16px 1fr;
  align-items: center;
  gap: 6px;
}
.prop-row label {
  font-size: 10px;
  color: var(--muted);
  font-family: var(--mono);
}

.prop-input {
  background: var(--surf2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 8px;
  border-radius: 5px;
  font-size: 12px;
  font-family: var(--mono);
  width: 100%;
  outline: none;
}
.prop-input:focus { border-color: var(--accent); }

.slider {
  width: 100%;
  accent-color: var(--accent);
  margin-top: 6px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 12px;
  cursor: pointer;
  color: var(--text);
}
.checkbox-label input[type="checkbox"] { accent-color: var(--accent); }

.prop-filename {
  font-size: 11px;
  color: var(--muted);
  font-family: var(--mono);
  word-break: break-all;
}

/* ── Drop Overlay ─────────────────────────────────────────────────────────── */
.drop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8,8,16,.85);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  pointer-events: none;
  border: 4px dashed var(--accent);
}
.drop-overlay.active { display: flex; }
.drop-inner { text-align: center; }
.drop-icon { font-size: 64px; margin-bottom: 16px; }
.drop-inner p { font-size: 22px; font-weight: 700; color: var(--text); }

/* ── FAB ──────────────────────────────────────────────────────────────────── */
.fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(124,58,237,.5);
  transition: transform .15s, box-shadow .15s;
  z-index: 200;
  user-select: none;
}
.fab:hover { transform: scale(1.08); box-shadow: 0 6px 30px rgba(124,58,237,.7); }
.fab:active { transform: scale(.96); }

/* ── Upload options ───────────────────────────────────────────────────────── */
.upload-options {
  position: fixed;
  bottom: 96px;
  right: 28px;
  background: rgba(15, 15, 28, .92);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  z-index: 210;
  backdrop-filter: blur(6px);
}
.checkbox-label-sm {
  margin-top: 0;
  font-size: 11px;
  color: var(--muted);
}

/* ── Toast ────────────────────────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 100px;
  right: 28px;
  background: var(--surf2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 9999;
  opacity: 0;
  transform: translateY(10px);
  transition: all .25s;
  pointer-events: none;
}
#toast.show { opacity: 1; transform: translateY(0); }