#sum-path-master-wrapper {
    --title-blue: #60a5fa;
    --primary-grey: #374151;
    --border-grey: #d1d5db;
    --bg-page: #f3f4f6;
    --text-black: #000000;
    
    width: 100% !important;
    padding: 40px 10px !important;
    background-color: var(--bg-page) !important;
    font-family: 'Segoe UI', Arial, sans-serif !important;
    display: flex !important;
    justify-content: center !important;
}

#sum-path-master-wrapper * { box-sizing: border-box !important; }

.converter-container {
    background: #ffffff !important;
    width: 100% !important;
    max-width: 450px !important;
    padding: 30px !important;
    border-radius: 12px !important;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08) !important;
    border: 1px solid var(--border-grey) !important;
    text-align: center !important;
}

.main-title { 
    color: var(--title-blue) !important; 
    margin: 0 0 15px 0 !important;
    font-size: 28px !important;
    font-weight: 700 !important;
}

.lvl-info {
    font-size: 14px !important;
    font-weight: bold !important;
    color: var(--primary-grey) !important;
    margin-bottom: 20px !important;
    text-transform: uppercase;
}

.conversion-layout {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 15px !important;
    margin-bottom: 25px !important;
}

.input-group {
    display: flex !important;
    flex-direction: column !important;
    gap: 5px !important;
    text-align: left !important;
}

#sum-path-master-wrapper label {
    font-size: 11px !important;
    font-weight: bold !important;
    color: #9ca3af !important;
    text-transform: uppercase !important;
}

.display-box {
    background: #ffffff !important;
    border: 2px solid var(--border-grey) !important;
    border-radius: 8px !important;
    padding: 12px !important;
    font-size: 22px !important;
    font-weight: 800 !important;
    color: var(--text-black) !important;
    text-align: center !important;
}

.target-box { border-color: #fbbf24 !important; color: #b45309 !important; }
.sum-box { border-color: var(--title-blue) !important; color: var(--title-blue) !important; }

/* Grid Styling */
.grid-layout { 
    display: grid !important; 
    gap: 8px !important; 
    background: #f9fafb !important; 
    padding: 12px !important; 
    border-radius: 10px !important;
    border: 1px solid var(--border-grey) !important;
    margin-bottom: 15px !important;
}

.cell { 
    aspect-ratio: 1 !important; 
    background: #ffffff !important; 
    display: flex !important; 
    align-items: center !important; 
    justify-content: center !important; 
    font-size: 1.4rem !important; 
    font-weight: bold !important; 
    border-radius: 8px !important; 
    border: 1px solid var(--border-grey) !important;
    color: var(--text-black) !important;
    cursor: pointer !important; 
    transition: 0.2s !important;
}

.cell.active { 
    background: var(--title-blue) !important; 
    color: #ffffff !important; 
    border-color: var(--title-blue) !important;
    transform: scale(0.95); 
}

#msg { height: 20px; margin: 15px 0; font-size: 14px; font-weight: 600; color: #6b7280; }

.actions { display: flex !important; flex-direction: column !important; gap: 10px !important; }

.btn-download, .btn-util {
    background: var(--primary-grey) !important;
    color: white !important;
    border: none !important;
    padding: 14px !important;
    border-radius: 8px !important;
    font-weight: bold !important;
    cursor: pointer !important;
    font-size: 15px !important;
}

.btn-download { background: #22c55e !important; } /* Green for Next */
.btn-util { background: #6b7280 !important; } /* Grey for Reset */
.btn-quit { background: transparent !important; color: #ef4444 !important; border: 1px solid #ef4444 !important; }

.hidden { display: none !important; }

@media (max-width: 480px) {
    .main-title { font-size: 22px !important; }
    .display-box { font-size: 18px !important; }
}