.convertisseur-container {
    max-width: 1000px;
}

.option-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1.5rem;
}

.conversion-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: start;
    margin-bottom: 2rem;
}

.conversion-column {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.conversion-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.result-field {
    background: rgba(58, 85, 140, 0.2);
    cursor: not-allowed;
}

.unit-select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(20, 30, 60, 0.6);
    border: 2px solid rgba(58, 85, 140, 0.6);
    border-radius: 8px;
    color: #ffffff;
    font-family: var(--font-family);
    font-size: 0.95rem;
    font-weight: 500;
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.unit-select option {
    background: #0d1428;
    color: #ffffff;
    font-weight: 500;
}

.unit-select:focus {
    background: rgba(30, 45, 80, 0.7);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ffffff' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    border-color: rgba(114, 164, 242, 0.9);
    box-shadow: 0 0 0 3px rgba(114, 164, 242, 0.25);
}

.conversion-arrow {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(114, 164, 242, 0.8);
    margin-top: 2rem;
}

.conversion-arrow svg {
    width: 100%;
    height: 100%;
    transform: rotate(90deg);
}

.info-box {
    margin-top: 1.5rem;
    padding: 1rem 1.5rem;
    background: rgba(114, 164, 242, 0.15);
    border: 1px solid rgba(114, 164, 242, 0.3);
    border-radius: 12px;
    text-align: center;
}

.info-box p {
    margin: 0;
    color: var(--text-white);
    font-size: 1rem;
}

@media (max-width: 768px) {
    .conversion-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .conversion-arrow {
        transform: rotate(0deg);
        margin: 0 auto;
    }

    .conversion-arrow svg {
        transform: rotate(180deg);
    }
}

@media (max-width: 480px) {
    .conversion-grid {
        gap: 1rem;
    }

    .unit-select {
        font-size: 0.95rem;
        padding: 0.65rem 0.9rem;
    }

    .info-box p {
        font-size: 0.95rem;
    }
}