/* ═══════════════════════════════════════════════════════════
   Assembly Mode — Drag & Drop Пневмостенд
   ═══════════════════════════════════════════════════════════ */

/* ── Navigation ──────────────────────────────────────────── */
.assembly-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.5rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-card);
  position: sticky;
  top: 0;
  z-index: 100;
}
.assembly-back {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}
.assembly-back:hover { color: var(--accent-cyan); }
.assembly-nav-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

/* ── Intro Screen ────────────────────────────────────────── */
.assembly-screen {
  min-height: calc(100vh - 56px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.assembly-intro {
  max-width: 600px;
  padding: 2rem;
  text-align: center;
}
.assembly-intro-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
.assembly-intro-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.8rem;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.assembly-intro-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}
.assembly-intro-levels {
  text-align: left;
  margin: 1.5rem auto;
  max-width: 400px;
}
.intro-level-item {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.assembly-intro-info {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Start / Next Buttons ────────────────────────────────── */
.btn-assembly {
  padding: 0.9rem 2rem;
  border: none;
  border-radius: 12px;
  font-family: var(--font-main);
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  margin: 0.4rem;
}
.btn-assembly-start,
.btn-assembly-next {
  background: linear-gradient(135deg, var(--accent-cyan), #00b8d4);
  color: #000;
}
.btn-assembly-start:hover,
.btn-assembly-next:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,229,255,0.3);
}
.btn-assembly-restart {
  background: linear-gradient(135deg, var(--accent-green), #00c853);
  color: #000;
}
.btn-assembly-back {
  background: rgba(255,255,255,0.08);
  color: var(--text-secondary);
  border: 1px solid var(--border-card);
}
.btn-assembly-back:hover {
  background: rgba(255,255,255,0.12);
}

/* ── Assembly Container ──────────────────────────────────── */
.assembly-container {
  padding: 1rem;
  max-width: 1000px;
  margin: 0 auto;
}

/* ── Header ──────────────────────────────────────────────── */
.assembly-header {
  text-align: center;
  margin-bottom: 1.5rem;
}
.assembly-level-badge {
  display: inline-block;
  padding: 0.3rem 1rem;
  background: rgba(0,229,255,0.15);
  color: var(--accent-cyan);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.assembly-title {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}
.assembly-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
  max-width: 600px;
  margin: 0 auto 1rem;
}
.assembly-progress-bar {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
  max-width: 400px;
  margin: 0.8rem auto;
}
.assembly-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
  border-radius: 3px;
  transition: width 0.4s ease;
}
.assembly-status {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ── Workspace ───────────────────────────────────────────── */
.assembly-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* ── Stand (Slots Area) ──────────────────────────────────── */
.assembly-stand {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 1.2rem;
}
.assembly-stand-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--accent-cyan);
}
.assembly-slots {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

/* ── Individual Slot ─────────────────────────────────────── */
.assembly-slot {
  min-height: 90px;
  border: 2px dashed rgba(255,255,255,0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  padding: 0.8rem;
}
.assembly-slot.slot-hover {
  border-color: var(--accent-cyan);
  background: rgba(0,229,255,0.08);
  box-shadow: 0 0 20px rgba(0,229,255,0.15);
  transform: scale(1.02);
}
.assembly-slot.slot-filled {
  border-style: solid;
}
.assembly-slot.slot-correct {
  border-color: var(--accent-green);
  background: rgba(0,255,136,0.06);
}
.assembly-slot.slot-wrong {
  animation: shakeSlot 0.5s ease;
  border-color: #ff4444;
  background: rgba(255,68,68,0.1);
}
@keyframes shakeSlot {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}
@keyframes slotSnap {
  0% { transform: scale(1.08); }
  50% { transform: scale(0.95); }
  100% { transform: scale(1); }
}

.slot-placeholder {
  text-align: center;
}
.slot-icon {
  font-size: 1.5rem;
  margin-bottom: 0.3rem;
  opacity: 0.5;
}
.slot-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.slot-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* ── Placed Component in Slot ────────────────────────────── */
.slot-component-placed {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  width: 100%;
}
.placed-image {
  width: 60px;
  height: 60px;
  object-fit: contain;
  border-radius: 8px;
}
.placed-name {
  font-weight: 600;
  font-size: 0.9rem;
  flex: 1;
}
.placed-check {
  font-size: 1.2rem;
}

/* ── Palette (Components Area) ───────────────────────────── */
.assembly-palette {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 1.2rem;
}
.assembly-palette-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--accent-amber);
}
.assembly-components {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

/* ── Draggable Component ─────────────────────────────────── */
.assembly-component {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.6rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 10px;
  cursor: grab;
  transition: all 0.2s;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}
.assembly-component:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-1px);
}
.assembly-component:active {
  cursor: grabbing;
}
.assembly-component.dragging {
  opacity: 0.4;
  transform: scale(0.95);
}
.assembly-component.component-used {
  opacity: 0.25;
  pointer-events: none;
  filter: grayscale(1);
}
.component-image {
  width: 56px;
  height: 56px;
  object-fit: contain;
  border-radius: 6px;
  background: rgba(0,0,0,0.3);
  flex-shrink: 0;
}
.component-name {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text-primary);
}

/* ── Touch Clone ─────────────────────────────────────────── */
.assembly-touch-clone {
  pointer-events: none;
  border-radius: 10px;
  background: var(--bg-card);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 8px 30px rgba(0,229,255,0.2);
  padding: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* ── Feedback Toast ──────────────────────────────────────── */
.assembly-feedback {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card);
  border-radius: 14px;
  padding: 1rem 1.5rem;
  max-width: 400px;
  width: 90%;
  z-index: 1000;
  opacity: 0;
  transition: all 0.3s;
  box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}
.assembly-feedback-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.assembly-feedback-success {
  border: 1px solid rgba(0,255,136,0.3);
}
.assembly-feedback-error {
  border: 1px solid rgba(255,68,68,0.3);
}
.assembly-fb-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.3rem;
}
.assembly-feedback-success .assembly-fb-title { color: var(--accent-green); }
.assembly-feedback-error .assembly-fb-title { color: #ff6b6b; }
.assembly-fb-text {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.4;
}

/* ── Level Complete ──────────────────────────────────────── */
.assembly-complete,
.assembly-final {
  text-align: center;
  padding: 3rem 2rem;
  max-width: 500px;
  margin: 0 auto;
}
.assembly-complete-icon,
.assembly-final-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}
.assembly-complete-title,
.assembly-final-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.assembly-final-subtitle {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.assembly-stars,
.assembly-final-stars {
  font-size: 2rem;
  letter-spacing: 0.3rem;
  margin: 1rem 0;
}
.assembly-final-score {
  margin: 1rem 0;
}
.score-number {
  font-size: 3rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}
.score-label {
  font-size: 1.3rem;
  color: var(--text-muted);
}
.assembly-complete-stats {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}
.assembly-stat {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: rgba(255,255,255,0.04);
  border-radius: 100px;
  font-size: 0.9rem;
}
.assembly-stat-icon { font-size: 1rem; }
.assembly-stat-label { color: var(--text-muted); }
.assembly-stat-value {
  font-weight: 700;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}
.assembly-complete-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
  margin: 1.5rem 0;
  padding: 1rem;
  background: rgba(0,229,255,0.05);
  border-left: 3px solid var(--accent-cyan);
  border-radius: 0 8px 8px 0;
  text-align: left;
}
.assembly-complete-actions {
  margin-top: 2rem;
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .assembly-workspace {
    grid-template-columns: 1fr;
  }
  .assembly-palette {
    position: sticky;
    bottom: 0;
    max-height: 35vh;
    overflow-y: auto;
    border-radius: 16px 16px 0 0;
    border-bottom: none;
  }
  .assembly-components {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }
  .assembly-component {
    flex-direction: column;
    text-align: center;
    padding: 0.5rem;
  }
  .component-image {
    width: 48px;
    height: 48px;
  }
  .component-name {
    font-size: 0.75rem;
  }
  .assembly-intro-title {
    font-size: 1.5rem;
  }
  .assembly-complete-title,
  .assembly-final-title {
    font-size: 1.4rem;
  }
  .score-number {
    font-size: 2.5rem;
  }
}