/* ==============================
   CONTENEDOR PRINCIPAL
================================ */
.periodo-page {
    max-width: 480px;
    margin: 80px auto;
    padding: 32px;
    background: #2b2b2b;
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    text-align: center;
}

/* ==============================
   TITULOS
================================ */
.periodo-page__title {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 6px;
    color: #80cccc;
}

.periodo-page__subtitle {
    font-size: 0.95rem;
    color: #6b7280;
    margin-bottom: 28px;
}

/* ==============================
   FORMULARIO
================================ */
.periodo-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* ==============================
   CAMPOS
================================ */
.periodo-field {
    text-align: left;
}

.periodo-field label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: #80cccc;
}

/* ⚠️ SOLO afecta inputs dentro de .periodo-page */
.periodo-page select,
.periodo-page input {
    width: 100%;
    padding: 12px 14px;
    font-size: 0.95rem;
    border-radius: 8px;
    border: 1px solid #000000;
    background-color: #484848;
    color: #ffffff;
    transition: all 0.2s ease;
}

.periodo-page select:focus,
.periodo-page input:focus {
    outline: none;
    border-color: #000000;
    background-color: #000000;
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

/* ==============================
   BOTON
================================ */
.periodo-btn {
    margin-top: 10px;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    background: linear-gradient(135deg, #22d3c5, #22d3c5);
    color: #ffffff;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.periodo-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

/* ==============================
   RESPONSIVE
================================ */
@media (max-width: 480px) {
    .periodo-page {
        margin: 40px 16px;
        padding: 24px;
    }
}