/* ============================================
   UI CSS - Компоненты интерфейса
   ============================================ */
.piece-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    background: var(--bg-card);
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text);
    font-weight: 600;
    font-size: 11px;
    font-family: inherit;
    transition: all 0.2s;
}

.piece-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    transform: translateX(2px);
}

.piece-btn.active {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border-color: var(--accent-light);
    color: var(--bg-darkest);
    box-shadow: 0 0 15px var(--accent-glow);
}

.piece-icon {
    width: 24px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.piece-icon svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
}

.piece-name { flex: 1; }

.piece-hotkey {
    font-size: 8px;
    font-weight: 700;
    padding: 2px 4px;
    background: var(--bg-hover);
    border-radius: 3px;
    color: var(--text-muted);
}

.piece-btn.active .piece-hotkey {
    background: rgba(0,0,0,0.2);
    color: var(--bg-darkest);
}

.piece-btn.locked {
    opacity: 0.6;
    border: 2px dashed var(--border-light);
    background: var(--bg-dark);
}

.piece-btn.locked:hover {
    border-color: var(--accent);
    opacity: 0.8;
}

.piece-price {
    font-size: 9px;
    font-weight: 700;
    padding: 2px 6px;
    background: var(--accent);
    color: var(--bg-darkest);
    border-radius: 8px;
}

.locked-empty {
    padding: 12px;
    text-align: center;
    color: var(--success);
    font-size: 11px;
    font-weight: 600;
}
.templates-section { margin-top: auto; }

.templates-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 180px;
    overflow-y: auto;
}

.templates-list::-webkit-scrollbar { width: 6px; }
.templates-list::-webkit-scrollbar-track { background: var(--bg-dark); border-radius: 3px; }
.templates-list::-webkit-scrollbar-thumb { 
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border-radius: 3px;
}
.templates-list::-webkit-scrollbar-thumb:hover { 
    background: var(--accent-light);
}

.templates-empty {
    padding: 12px;
    text-align: center;
    color: var(--text-muted);
    font-size: 10px;
    background: var(--bg-card);
    border-radius: 6px;
    border: 2px dashed var(--border-light);
}

.template-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    background: var(--bg-card);
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.template-item:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
}

.template-item.active {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--bg-darkest);
}

.template-preview {
    width: 32px;
    height: 24px;
    background: var(--bg-hover);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.template-info { flex: 1; min-width: 0; }

.template-name {
    font-weight: 700;
    font-size: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.template-count {
    font-size: 9px;
    color: var(--text-muted);
}

.template-delete {
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.template-delete:hover {
    background: var(--danger);
    color: white;
}

.template-delete svg {
    width: 12px;
    height: 12px;
    stroke: currentColor;
    fill: none;
}
.colors-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
}

.color-btn {
    aspect-ratio: 1;
    border: 2px solid transparent;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s;
}

.color-btn:hover {
    transform: scale(1.15);
    z-index: 1;
}

.color-btn.active {
    transform: scale(1.2);
    border-color: white;
    box-shadow: 0 0 12px var(--accent-glow);
    z-index: 2;
}

.color-preview {
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    background: var(--bg-card);
    border-radius: 6px;
}

.color-preview-brick {
    width: 36px;
    height: 22px;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.preview-stud {
    width: 6px;
    height: 6px;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
}

.color-preview-name {
    font-weight: 700;
    font-size: 12px;
}
.info-panel {
    background: var(--bg-card);
    border-radius: 6px;
    padding: 8px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid var(--border);
}

.info-row:last-child { border-bottom: none; }

.info-label {
    color: var(--text-muted);
    font-size: 11px;
}

.info-value {
    font-weight: 700;
    color: var(--accent);
    font-size: 12px;
}
.quick-actions {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.hotkeys-section { margin-top: auto; }

.hotkeys-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4px;
}

.hotkey {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 9px;
    color: var(--text-secondary);
}

kbd {
    padding: 2px 4px;
    background: var(--bg-dark);
    border: 1px solid var(--border-light);
    border-radius: 3px;
    font-family: inherit;
    font-size: 8px;
    font-weight: 700;
    color: var(--accent);
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 7px 12px;
    border: 2px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    font-size: 11px;
    font-weight: 700;
    transition: all 0.2s;
}

.btn svg {
    width: 14px;
    height: 14px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.btn-small {
    padding: 5px 10px;
    font-size: 10px;
}

.btn-small svg { width: 12px; height: 12px; }

.btn-full {
    width: 100%;
    justify-content: flex-start;
    padding: 8px 10px;
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border);
    font-size: 10px;
}

.btn-full:hover {
    border-color: var(--accent);
    background: var(--bg-hover);
}

.btn-full svg { margin-right: 6px; }

.btn-tool {
    width: 32px;
    height: 32px;
    padding: 0;
    background: var(--bg-card);
    color: var(--text-secondary);
}

.btn-tool:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.btn-tool:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-tool.active {
    background: var(--accent);
    color: var(--bg-darkest);
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

.btn-build.active {
    background: var(--success);
    border-color: var(--success);
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.5);
}

.btn-select.active {
    background: var(--info);
    border-color: var(--info);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

.btn-danger:hover:not(:disabled),
.btn-danger.active {
    border-color: var(--danger);
    color: var(--danger);
}

.btn-danger.active {
    background: var(--danger);
    color: white;
}

.btn-warning:hover:not(:disabled) {
    border-color: var(--warning);
    color: var(--warning);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: var(--bg-darkest);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 15px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text);
    border-color: var(--border-light);
}

.btn-secondary:hover { border-color: var(--accent); }
.toolbar {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 4px;
}

.toolbar-group.tools {
    padding: 0 6px;
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.toolbar-divider {
    width: 1px;
    height: 18px;
    background: var(--border);
}

.stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3px 10px;
    background: var(--bg-card);
    border-radius: 6px;
}

.stat-number {
    font-size: 16px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.stat-label {
    font-size: 8px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
}
.selection-bar {
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%) translateY(-15px);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    background: rgba(59, 130, 246, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid var(--info);
    border-radius: 10px;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
}

.selection-bar.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.selection-count {
    font-weight: 700;
    font-size: 12px;
}
.mode-badge {
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 11px;
    font-weight: 700;
    opacity: 0;
    transition: all 0.3s;
    pointer-events: none;
}

.mode-badge.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.mode-badge.build { border-color: var(--success); color: var(--success); }
.mode-badge.delete { border-color: var(--danger); color: var(--danger); }
.mode-badge.select { border-color: var(--info); color: var(--info); }
.mode-badge.template { border-color: var(--accent); color: var(--accent); }
.hints-bar {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    padding: 6px 14px;
    background: rgba(26, 26, 46, 0.9);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
}

.hint {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 10px;
    color: var(--text-secondary);
}
.main-buttons { padding: 10px !important; }

.main-btn-row {
    display: flex;
    gap: 6px;
}

.main-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 10px 6px;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-hover) 100%);
    border: 2px solid var(--border);
    border-radius: 10px;
    cursor: pointer;
    color: var(--text);
    font-family: inherit;
    font-weight: 700;
    font-size: 8px;
    text-transform: uppercase;
    transition: all 0.3s;
}

.main-btn:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.3);
}

.main-btn-icon {
    font-size: 20px;
    transition: transform 0.3s;
}

.main-btn:hover .main-btn-icon { transform: scale(1.2); }

#shop-btn:hover { border-color: #22c55e; }
#achievements-btn:hover { border-color: #ffc107; }
#settings-btn:hover { border-color: #3b82f6; }

/* ============================================
   RESPONSIVE UI - Additional breakpoints
   ============================================ */
@media (max-width: 900px) {
    .piece-btn {
        padding: 6px;
        font-size: 10px;
    }
    
    .piece-icon {
        width: 22px;
        height: 15px;
    }
    
    .piece-name { font-size: 9px; }
    .piece-hotkey { font-size: 7px; }
    
    .toolbar {
        gap: 4px;
    }
    
    .btn-tool {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }
    
    .stat-box {
        padding: 4px 8px;
    }
    
    .stat-number {
        font-size: 13px;
    }
    
    .stat-label {
        font-size: 10px;
    }
    
    .main-btn {
        padding: 8px 4px;
        gap: 2px;
        font-size: 7px;
    }
    
    .main-btn-icon {
        font-size: 18px;
    }
    
    .colors-grid {
        grid-template-columns: repeat(5, 1fr) !important;
    }
}

@media (max-width: 600px) {
    .piece-btn {
        padding: 5px;
        font-size: 9px;
    }
    
    .piece-icon {
        width: 20px;
        height: 14px;
    }
    
    .piece-name { font-size: 8px; }
    .piece-hotkey { display: none; }
    
    .toolbar {
        gap: 3px;
        padding: 3px 4px;
    }
    
    .btn-tool {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }
    
    .toolbar-divider {
        width: 1px;
        height: 20px;
    }
    
    .toolbar-group {
        gap: 3px;
    }
    
    .stat-box {
        padding: 2px 6px;
        font-size: 9px;
    }
    
    .stat-number {
        font-size: 11px;
    }
    
    .stat-label {
        font-size: 8px;
    }
    
    .session-timer {
        display: none;
    }
    
    .main-btn {
        padding: 6px 3px;
        gap: 1px;
        font-size: 6px;
    }
    
    .main-btn-icon {
        font-size: 16px;
    }
    
    .colors-grid {
        grid-template-columns: repeat(4, 1fr) !important;
    }
    
    .color-preview {
        padding: 6px;
    }
    
    .color-preview-brick {
        width: 24px;
        height: 14px;
    }
    
    .color-preview-name {
        font-size: 10px;
    }
    
    .info-panel {
        font-size: 11px;
    }
    
    .info-label {
        font-size: 10px;
    }
    
    .info-value {
        font-size: 10px;
    }
}

@media (max-width: 400px) {
    .piece-btn {
        padding: 4px;
        font-size: 8px;
    }
    
    .piece-icon {
        width: 18px;
        height: 12px;
    }
    
    .btn-tool {
        width: 24px;
        height: 24px;
        font-size: 12px;
    }
    
    .toolbar-group.stats {
        gap: 2px;
    }
    
    .stat-box {
        padding: 1px 4px;
        font-size: 8px;
    }
    
    .stat-number {
        font-size: 9px;
    }
    
    .colors-grid {
        grid-template-columns: repeat(3, 1fr) !important;
    }
}

@media (max-height: 500px) {
    .toolbar {
        padding: 2px 4px;
        gap: 3px;
    }
    
    .btn-tool {
        width: 24px;
        height: 24px;
        font-size: 12px;
    }
    
    .hints-bar {
        bottom: 5px;
        gap: 8px;
        padding: 4px 10px;
        font-size: 8px;
    }
    
    .hint {
        gap: 2px;
        font-size: 8px;
    }
}