/* =========================================================
   CALCULADORA DE GAS
========================================================= */

.gas-calculator {
    max-width: 850px;
    margin: 0 auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 35px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.gas-form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 25px;
}

.gas-field {
    display: flex;
    flex-direction: column;
}

.gas-field label {
    color: var(--text-color);
    font-weight: 700;
    margin-bottom: 10px;
}

.gas-field input {
    width: 100%;
    padding: 15px 16px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    outline: none;
    transition:
        border-color 0.2s,
        box-shadow 0.2s;
}

.gas-field input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(98, 126, 234, 0.15);
}

.gas-field small {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 8px;
    line-height: 1.5;
}

.gas-submit {
    width: 100%;
    margin-top: 25px;
    padding: 15px 20px;
    border: 0;
    border-radius: 10px;
    background: var(--accent-color);
    color: #ffffff;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition:
        transform 0.2s,
        opacity 0.2s;
}

.gas-submit:hover {
    transform: translateY(-1px);
    opacity: 0.92;
}

.gas-submit:active {
    transform: translateY(0);
}

.gas-error {
    min-height: 24px;
    margin-top: 12px;
    color: #f87171;
    font-size: 0.9rem;
}

.gas-result {
    margin-top: 30px;
    padding: 30px;
    border-radius: 14px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    text-align: center;
}

.gas-result-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.gas-result strong {
    display: block;
    color: var(--accent-color);
    font-size: 2.2rem;
    line-height: 1.2;
    word-break: break-word;
}

.gas-result > span:nth-of-type(2) {
    display: block;
    margin-top: 8px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.gas-result p {
    max-width: 650px;
    margin: 18px auto 0;
    color: var(--text-muted);
    line-height: 1.7;
}

.formula-box {
    max-width: 850px;
    margin: 0 auto;
    padding: 35px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
}

.formula-main {
    padding: 20px;
    margin-bottom: 25px;
    border-radius: 10px;
    background: var(--bg-color);
    color: var(--accent-color);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.7;
}

.formula-box p {
    color: var(--text-muted);
    margin-bottom: 15px;
}

.formula-example {
    margin: 15px 0 25px;
    padding: 15px;
    border-radius: 10px;
    background: var(--bg-color);
    color: var(--text-color);
    font-weight: 700;
    overflow-wrap: anywhere;
}

.info-box {
    padding: 30px;
}

.info-box strong {
    display: block;
    margin-bottom: 12px;
    color: var(--accent-color);
    font-size: 1.1rem;
}

.info-box p + p {
    margin-top: 15px;
}


/* =========================================================
   RESPONSIVE
========================================================= */

@media (max-width: 700px) {

    .gas-calculator {
        padding: 22px;
    }

    .gas-form-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .gas-result {
        padding: 24px 18px;
    }

    .gas-result strong {
        font-size: 1.8rem;
    }

    .formula-box {
        padding: 22px;
    }

    .formula-main {
        font-size: 1rem;
    }

}