#hc-hacim-hesaplama {
    background: #ffffff;
    background-image: linear-gradient(#f1f5f9 1px, transparent 1px), linear-gradient(90deg, #f1f5f9 1px, transparent 1px);
    background-size: 20px 20px;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    font-family: 'Outfit', sans-serif;
    max-width: 500px;
    margin: 20px auto;
    border: 1px solid #e2e8f0;
}

#hc-hacim-hesaplama .hc-header h3 {
    margin: 0 0 10px;
    color: #1e293b;
    font-size: 1.4rem;
    font-weight: 800;
}

#hc-hacim-hesaplama .hc-form-group label {
    display: block;
    font-weight: 700;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: #475569;
}

#hc-hacim-hesaplama select,
#hc-hacim-hesaplama input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    background: #ffffff;
    font-size: 1rem;
    font-weight: 600;
}

#hc-hacim-hesaplama .hc-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

#hc-hacim-hesaplama .hc-btn {
    width: 100%;
    background: #0f172a;
    color: white;
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    margin-top: 20px;
    cursor: pointer;
}

#hc-hacim-hesaplama .hc-result {
    margin-top: 30px;
    padding: 25px;
    background: #eff6ff;
    border-radius: 15px;
    border: 1px solid #dbeafe;
    text-align: center;
    display: none;
}

#hc-hacim-hesaplama .hc-result.visible {
    display: block;
    animation: fadeIn 0.4s ease;
}

#hc-hacim-hesaplama .hc-res-label {
    font-size: 0.75rem;
    font-weight: 800;
    color: #3b82f6;
    letter-spacing: 0.1em;
    margin-bottom: 10px;
}

#hc-hacim-hesaplama .hc-res-main {
    font-size: 2.2rem;
    font-weight: 900;
    color: #1e3a8a;
}

#hc-hacim-hesaplama .hc-res-main small {
    font-size: 1rem;
    color: #60a5fa;
}