.calc-box {
    max-width: 500px;
    margin: 20px auto;
    padding: 20px;
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.calc-box h3 {
    margin-bottom: 15px;
    color: #1A365D;
    font-weight: 700;
    text-align: center;
}

.calc-box label {
    font-weight: 600;
    margin-bottom: 5px;
    display: block;
    color: #4A5D4E;
}

.calc-box input,
.calc-box select {
    width: 100%;
    padding: 10px 40px 10px 12px;
    border-radius: 12px;
    border: 1px solid #d0d0d0;
    margin-bottom: 15px;
    transition: 0.25s;
    font-size: 14px;
}

.calc-box input:focus,
.calc-box select:focus {
    outline: none;
    border-color: #ffcb11;
    box-shadow: 0 0 0 2px rgba(255,203,17,0.35);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-flag {
    position: absolute;
    right: 10px;
    font-size: 18px;
    animation: flagFloat 2s infinite ease-in-out;
}

@keyframes flagFloat {
    0% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
    100% { transform: translateY(0); }
}

#btnWhatsapp {
    margin-top: 12px;
    width: 100%;
    padding: 12px;
    background: #000000;
    color: #ffffff;
    border: none;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.03em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    transition: 0.25s;
}

#btnWhatsapp:hover {
    background: #1A365D;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.25);
}

#logosInstituciones {
    display:flex;
    gap:10px;
    justify-content:center;
    flex-wrap:wrap;
    margin-top:20px;
}

#logosInstituciones img {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    margin: 5px;
    object-fit: contain;
    background: #f7f7f7;
    padding: 6px;
    animation: logoFade 0.6s ease-in-out;
}

@keyframes logoFade {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.sub-label {
    font-size: 12px;
    color: #777;
    margin-bottom: 8px;
}