#gest-calculadora {
    --gc-primary: #0d7377;
    --gc-primary-dark: #0a5a5d;
    --gc-primary-light: #e6f5f3;
    --gc-text: #1e293b;
    --gc-text-muted: #64748b;
    --gc-border: #dce7e5;
    --gc-bg: #f4faf9;
    --gc-white: #ffffff;
    --gc-radius: 16px;
    --gc-shadow: 0 4px 20px rgba(13, 115, 119, 0.08), 0 1px 3px rgba(13, 115, 119, 0.06);

    font-family: 'Rubik', Helvetica, Arial, sans-serif;
    color: var(--gc-text);
    max-width: 100%;
    margin: 2.5rem auto;
    padding: 2.25rem 2rem 2rem;
    background: var(--gc-white);
    border: 1px solid var(--gc-border);
    border-radius: var(--gc-radius);
    box-shadow: var(--gc-shadow);
    position: relative;
    overflow: hidden;
}

#gest-calculadora::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--gc-primary) 0%, #4fb3ac 50%, var(--gc-primary) 100%);
}

/* ---------- Cabeçalho ---------- */
#gest-calculadora h2 {
    font-weight: 600;
    font-size: 1.5rem;
    letter-spacing: -0.01em;
    margin: 0 0 1.5rem;
}

/* ---------- Campos do formulário ---------- */
#gest-calculadora>div {
    margin-bottom: 1.25rem;
}

#gest-calculadora label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: rgb(61, 61, 61);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 0.45rem;
}

#gest-calculadora input[type="date"],
#gest-calculadora input[type="number"] {
    font-size: 1rem;
    font-weight: 500;
    color: var(--gc-text);
    border: 1.5px solid var(--gc-border) !important;
    border-radius: 10px !important;
    padding: 0.65rem 0.9rem !important;
    background-color: var(--gc-white);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#gest-calculadora input[type="date"]:hover,
#gest-calculadora input[type="number"]:hover {
    border-color: var(--gc-primary) !important;
}

#gest-calculadora input[type="date"]:focus,
#gest-calculadora input[type="number"]:focus {
    outline: none;
    border-color: var(--gc-primary) !important;
    box-shadow: 0 0 0 3px rgba(13, 115, 119, 0.15);
}

/* estiliza o ícone nativo do calendário para acompanhar a paleta */
#gest-calculadora input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(31%) sepia(52%) saturate(597%) hue-rotate(133deg) brightness(93%) contrast(92%);
    cursor: pointer;
}

/* ---------- Botão CALCULAR ---------- */
#gest-calculadora #calcBtn {
    box-shadow: 0 4px 14px rgba(1, 93, 129, 0.28);
}

#gest-calculadora #calcBtn:focus-visible {
    outline: 2px solid var(--gc-primary-dark);
    outline-offset: 3px;
}

/* botão limpar, caso exista um #clearBtn correspondente no HTML */
#gest-calculadora #clearBtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.75rem;
    padding: 0 1.25rem;
    height: 50px;
    border: 1.5px solid var(--gc-border);
    border-radius: 10px;
    background: var(--gc-white);
    color: var(--gc-text-muted);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: 0.2s ease;
}

#gest-calculadora #clearBtn:hover {
    border-color: var(--gc-primary);
    color: var(--gc-primary-dark);
}

/* ---------- Alerta ---------- */
#gest-calculadora #alert {
    font-size: 0.9rem;
    font-weight: 500;
    border-left: 4px solid currentColor;
    line-height: 1.5;
}

/* ---------- Cartão de resultados ---------- */
#gest-calculadora #resultCard {
    margin-top: 1.75rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--gc-primary-light);
}

#gest-calculadora #resultCard h3 {
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    color: var(--gc-primary-dark);
    text-transform: uppercase;
    margin-bottom: 1rem;
}

#gest-calculadora #resultCard>div.grid>div {
    background: var(--gc-bg);
    border: 1px solid var(--gc-border);
    border-radius: 12px;
    padding: 0.9rem 1rem;
}

#gest-calculadora #resultCard .block {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gc-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 0.35rem;
}

#gest-calculadora #resultCard #gestAge,
#gest-calculadora #resultCard #totalDays,
#gest-calculadora #resultCard #dpp,
#gest-calculadora #resultCard #trimester {
    font-size: 1.15rem !important;
    font-weight: 600 !important;
    color: var(--gc-primary-dark) !important;
}

/* destaque especial para a DPP, o dado mais procurado na consulta */
#gest-calculadora #resultCard>div.grid>div:has(#dpp) {
    background: linear-gradient(135deg, var(--gc-primary) 0%, var(--gc-primary-dark) 100%);
    border: none;
}

#gest-calculadora #resultCard>div.grid>div:has(#dpp) .block {
    color: rgba(255, 255, 255, 0.75);
}

#gest-calculadora #resultCard>div.grid>div:has(#dpp) #dpp {
    color: var(--gc-white) !important;
}

/* ---------- Responsivo ---------- */
@media (max-width: 480px) {
    #gest-calculadora {
        width: 100%;
        padding: 1.5rem 1.25rem;
        border-radius: 12px;
    }

    #gest-calculadora h2 {
        font-size: 1.25rem;
    }

    #gest-calculadora #calcBtn {
        width: 100% !important;
    }

    #gest-calculadora #clearBtn {
        margin-left: 0;
        margin-top: 0.75rem;
        width: 100%;
    }
}

/* ---------- Movimento reduzido ---------- */
@media (prefers-reduced-motion: reduce) {
    #gest-calculadora * {
        transition: none !important;
    }
}