/* ===========================
   Room Planner — style.css
   Phase 4 update: colour swatches
   =========================== */

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

html, body {
  width: 100%; height: 100%; overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f5f5; color: #333;
}

/* ── Header ── */
#app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px; height: 48px;
  background: #fff; border-bottom: 1px solid #e0e0e0;
  flex-shrink: 0; z-index: 10; position: relative;
}
#app-title { font-size: 1.1rem; font-weight: 600; letter-spacing: 0.02em; color: #222; }
#header-buttons { display: flex; gap: 8px; }
#header-buttons button {
  padding: 6px 16px; border: 1px solid #ccc; border-radius: 6px;
  background: #fff; font-size: 0.85rem; cursor: pointer; color: #333;
  transition: background 0.15s, border-color 0.15s;
}
#header-buttons button:hover { background: #f0f0f0; border-color: #aaa; }

/* ── Layout ── */
body { display: flex; flex-direction: column; }
#app-main { display: flex; flex: 1; overflow: hidden; }

/* ── Canvas ── */
#canvas-area {
  flex: 1; display: flex; align-items: stretch; justify-content: stretch;
  background: #e8e8e8; position: relative;
}
#room-canvas { display: block; width: 100%; height: 100%; cursor: default; }

/* ── Zoom controls ── */
#zoom-controls {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 4px;
  background: rgba(255,255,255,0.92); border: 1px solid #ddd;
  border-radius: 8px; padding: 5px 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12); z-index: 20; user-select: none;
}
#zoom-controls button {
  width: 28px; height: 28px; border: 1px solid #ccc; border-radius: 5px;
  background: #fff; font-size: 1rem; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.1s; color: #333; font-weight: 600;
}
#zoom-controls button:hover { background: #f0f0f0; }
#zoom-label { font-size: 0.78rem; font-weight: 600; color: #555; min-width: 38px; text-align: center; }

/* ── Tools Panel ── */
#tools-panel {
  width: 220px; flex-shrink: 0; background: #fff;
  border-left: 1px solid #e0e0e0;
  display: flex; flex-direction: column; gap: 0;
  padding: 16px 12px; overflow-y: auto;
}

.tool-btn {
  width: 100%; padding: 9px 12px; border-radius: 7px; border: 1px solid #ccc;
  background: #fff; font-size: 0.9rem; cursor: pointer; text-align: center;
  transition: background 0.15s; margin-bottom: 4px;
}
.tool-btn:hover { background: #f0f0f0; }
.tool-btn.primary { background: #1a73e8; color: #fff; border-color: #1a73e8; font-weight: 600; }
.tool-btn.primary:hover  { background: #1558b0; border-color: #1558b0; }
.tool-btn.primary.active { background: #e8f0fe; color: #1a73e8; border-color: #1a73e8; }
.tool-btn.danger {
  background: #fff0f0; color: #c0392b; border-color: #f5c6c6; font-weight: 500; margin-top: 10px;
}
.tool-btn.danger:hover { background: #ffe0e0; border-color: #e0a0a0; }

/* ── Panel Sections ── */
.panel-section { margin-top: 18px; padding-top: 14px; border-top: 1px solid #ececec; }
.panel-label {
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: #888; margin-bottom: 10px;
  display: flex; align-items: center; gap: 6px;
}
.ph-tag {
  font-size: 0.65rem; background: #f0f0f0; color: #aaa; border-radius: 4px;
  padding: 1px 5px; font-weight: 500; text-transform: none; letter-spacing: 0;
}
.placeholder { opacity: 0.5; }

/* ── Shape Buttons ── */
.shape-buttons { display: flex; gap: 8px; }
.shape-btn {
  flex: 1; aspect-ratio: 1; border: 1px solid #ccc; border-radius: 6px;
  background: #fafafa; font-size: 1.3rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s, border-color 0.15s; color: #444;
}
.shape-btn:hover { background: #e8f0fe; border-color: #1a73e8; color: #1a73e8; }
.shape-btn.active { background: #e8f0fe; border-color: #1a73e8; color: #1a73e8; }

/* ── Colour Grid (Phase 4) ── */
#colour-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.colour-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 6px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.1s;
  outline: none;
  position: relative;
}
.colour-swatch:hover {
  transform: scale(1.12);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.colour-swatch.active {
  transform: scale(1.12);
  box-shadow: 0 0 0 3px #1a73e8, 0 2px 8px rgba(0,0,0,0.15);
}

/* ── Footer ── */
#app-footer {
  height: 28px; display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem; color: #bbb; background: #fff;
  border-top: 1px solid #e0e0e0; flex-shrink: 0; letter-spacing: 0.03em;
}

/* ── Print ── */
@media print {
  #app-header, #tools-panel, #app-footer, #zoom-controls { display: none !important; }
  #canvas-area { width: 100vw; height: 100vh; }
}