/*
 * main.css
 * Reclaimed Structure Assembly XR
 * ─────────────────────────────────
 * Full application stylesheet.
 * Uses CSS custom properties so it adapts to the host's light/dark theme.
 */

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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f4f3ee;
  color: #1a1a18;
  height: 100vh;
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  body { background: #1a1a18; color: #e8e6dc; }
}

/* ── Layout ────────────────────────────────────────── */
.workspace {
  display: grid;
  grid-template-columns: 220px 1fr 200px;
  grid-template-rows: 1fr 44px;
  height: 100vh;
  border-radius: 12px;
  overflow: hidden;
}

/* ── Shared Panel Tokens ───────────────────────────── */
:root {
  --panel-bg:     #f0eeea;
  --panel-border: rgba(0,0,0,0.1);
  --canvas-bg:    #faf9f5;
  --text-primary:   #1a1a18;
  --text-secondary: #6b6960;
  --green:  #1D9E75;
  --amber:  #BA7517;
  --red:    #E24B4A;
}
@media (prefers-color-scheme: dark) {
  :root {
    --panel-bg:       #222220;
    --panel-border:   rgba(255,255,255,0.08);
    --canvas-bg:      #1a1a18;
    --text-primary:   #e8e6dc;
    --text-secondary: #8a887e;
  }
}

/* ── Inventory (left) ──────────────────────────────── */
.inventory {
  background: var(--panel-bg);
  border-right: 0.5px solid var(--panel-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-header {
  padding: 12px 14px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border-bottom: 0.5px solid var(--panel-border);
  flex-shrink: 0;
}

.part-list {
  padding: 10px;
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ── Part card ─────────────────────────────────────── */
.part-card {
  background: #fff;
  border: 0.5px solid var(--panel-border);
  border-radius: 8px;
  padding: 10px;
  cursor: grab;
  transition: border-color 0.15s, transform 0.1s, opacity 0.2s;
  user-select: none;
}
@media (prefers-color-scheme: dark) {
  .part-card { background: #2a2a28; }
}
.part-card:hover { border-color: rgba(0,0,0,0.25); transform: translateX(2px); }
.part-card:active { cursor: grabbing; }
.part-card.exhausted { opacity: 0.38; cursor: not-allowed; pointer-events: none; }

.part-top { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.part-icon {
  width: 28px; height: 28px; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; flex-shrink: 0;
}
.part-name { font-size: 12px; font-weight: 600; color: var(--text-primary); }
.part-meta { font-size: 10px; color: var(--text-secondary); margin-top: 1px; }
.qty-badge {
  margin-left: auto;
  font-size: 10px; font-weight: 600;
  background: var(--panel-bg);
  border: 0.5px solid var(--panel-border);
  border-radius: 10px; padding: 1px 6px;
  color: var(--text-secondary);
  white-space: nowrap;
}
.part-tags { display: flex; gap: 4px; flex-wrap: wrap; }
.part-connects { font-size: 10px; color: var(--text-secondary); margin-top: 4px; }
.tag {
  font-size: 9px; font-weight: 600;
  padding: 2px 6px; border-radius: 4px;
}

/* ── Canvas (centre) ───────────────────────────────── */
.canvas-area {
  position: relative;
  background: var(--canvas-bg);
  overflow: hidden;
  /* grid dot background */
  background-image:
    radial-gradient(circle, var(--panel-border) 1px, transparent 1px);
  background-size: 28px 28px;
}

#connections-svg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}

.canvas-hint {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 8px; opacity: 0.35; pointer-events: none;
}
.canvas-hint svg { width: 36px; height: 36px; color: var(--text-secondary); }
.canvas-hint p { font-size: 12px; color: var(--text-secondary); text-align: center; line-height: 1.5; }

/* ── Placed parts ──────────────────────────────────── */
.placed-part {
  position: absolute;
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: move;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  transition: box-shadow 0.15s, border-color 0.15s;
  user-select: none;
  gap: 2px;
}
.placed-part:active { cursor: grabbing; }

.placed-part.valid   { border-color: #1D9E75; box-shadow: 0 0 0 3px rgba(29,158,117,0.15); }
.placed-part.invalid { border-color: #E24B4A; box-shadow: 0 0 0 3px rgba(226,75,74,0.15); }
.placed-part.warning { border-color: #BA7517; box-shadow: 0 0 0 3px rgba(186,117,23,0.15); }
.placed-part.neutral { border-color: rgba(0,0,0,0.14); }
.placed-part.dragging { opacity: 0.75; cursor: grabbing; }

.part-label {
  font-size: 9px; font-weight: 600;
  text-align: center; padding: 0 3px;
  opacity: 0.8; line-height: 1.2;
}

.snap-dot {
  position: absolute;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #1D9E75;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
  border: 1px solid #fff;
}
.placed-part:hover .snap-dot { opacity: 0.65; }

/* ── Info panel (right) ────────────────────────────── */
.info-panel {
  background: var(--panel-bg);
  border-left: 0.5px solid var(--panel-border);
  display: flex; flex-direction: column;
  overflow: hidden;
}

.score-block {
  padding: 12px 14px;
  border-bottom: 0.5px solid var(--panel-border);
  flex-shrink: 0;
}
.score-title {
  font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-secondary); margin-bottom: 8px;
}
.score-row {
  display: flex; align-items: center;
  justify-content: space-between; margin-bottom: 4px;
}
.score-label { font-size: 11px; color: var(--text-secondary); }
.score-val   { font-size: 12px; font-weight: 600; color: var(--text-primary); }
.score-bar-wrap {
  height: 3px; background: var(--panel-border);
  border-radius: 2px; margin-top: 2px;
}
.score-bar { height: 3px; border-radius: 2px; transition: width 0.4s, background 0.3s; }

.rules-block {
  padding: 12px 14px;
  border-bottom: 0.5px solid var(--panel-border);
  flex: 1; overflow-y: auto;
}
.rule-item {
  display: flex; align-items: flex-start;
  gap: 7px; margin-bottom: 8px;
}
.rule-dot {
  width: 7px; height: 7px;
  border-radius: 50%; margin-top: 3px; flex-shrink: 0;
  transition: background 0.3s;
}

.seq-block { padding: 12px 14px; flex-shrink: 0; }
.seq-title {
  font-size: 10px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-secondary); margin-bottom: 8px;
}
.seq-list {
  display: flex; flex-direction: column; gap: 3px;
  max-height: 140px; overflow-y: auto;
}
.seq-step {
  display: flex; gap: 6px; align-items: center;
  padding: 3px 0;
  border-bottom: 0.5px solid var(--panel-border);
}
.seq-num {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--panel-border);
  display: flex; align-items: center; justify-content: center;
  font-size: 9px; font-weight: 600;
  color: var(--text-secondary); flex-shrink: 0;
}

/* ── Toolbar ────────────────────────────────────────── */
.toolbar {
  grid-column: 1 / -1;
  background: var(--panel-bg);
  border-top: 0.5px solid var(--panel-border);
  display: flex; align-items: center; gap: 10px;
  padding: 0 14px;
}
.tb-status {
  flex: 1; display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--text-secondary);
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%; flex-shrink: 0;
  transition: background 0.3s;
}

.suggestions-area { display: flex; gap: 6px; flex-wrap: wrap; }
.suggestion-chip {
  font-size: 11px; font-weight: 500; padding: 3px 9px;
  background: rgba(29,158,117,0.12); color: #0F6E56;
  border-radius: 10px; border: none; cursor: pointer;
  transition: background 0.15s;
  font-family: inherit;
}
.suggestion-chip:hover { background: rgba(29,158,117,0.22); }

.legend {
  display: flex; gap: 10px; align-items: center;
  margin-left: auto;
}
.leg-item {
  display: flex; align-items: center; gap: 4px;
  font-size: 10px; color: var(--text-secondary);
}
.leg-dot { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; }

/* ── Buttons ────────────────────────────────────────── */
button {
  font-family: inherit;
  font-size: 12px; font-weight: 500;
  padding: 5px 12px;
  border-radius: 6px;
  border: 0.5px solid var(--panel-border);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
button:hover  { background: rgba(0,0,0,0.06); }
button:active { transform: scale(0.97); }

.btn-primary {
  background: rgba(29,158,117,0.1);
  color: #0F6E56; border-color: rgba(29,158,117,0.3);
}
.btn-primary:hover { background: rgba(29,158,117,0.2); }

.btn-xr {
  background: rgba(83,74,183,0.1);
  color: #534AB7; border-color: rgba(83,74,183,0.3);
}
.btn-xr:hover  { background: rgba(83,74,183,0.2); }
.btn-xr:disabled { opacity: 0.4; cursor: not-allowed; }

/* ── Scrollbar styling ──────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--panel-border); border-radius: 2px; }