/* HEADER SECTION */
.header-section {
    position: relative;
    width: 100%;
    min-height: 300px;
    background-color: #a0aec0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 4rem 2rem;
    box-sizing: border-box;
}

.header-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(41, 128, 185, 0.7), rgba(52, 152, 219, 0.7));
    z-index: 1;
}

.header-content {
    position: relative;
    z-index: 2;
    color: white;
    font-size: 3rem;
    font-weight: bold;
    text-align: center;
    padding: 0 1rem;
    line-height: 1.2;
    word-break: break-word;
    white-space: normal;
}

/* GENERAL CONTENT SECTION */
.content-section {
    background-color: #f3f4f6;
    padding: 4rem 0;
    display: flex;
    flex-direction: column;
}

.content-wrapper {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 1rem;
}

.content-wrapper h2 {
    font-size: 2.5rem;
    font-weight: bold;
    color: #3498db;
    margin-bottom: 2rem;
    text-align: center;
}

/* INSTRUCTIONS BLOCKS */
.instructions-block {
    border-radius: 0.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    padding: 2.5rem;
    margin-bottom: 3rem;
    color: white;
}

.instructions-block h3 {
    font-size: 2.2rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    text-align: center;
    color: white;
}

.instructions-block ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.instructions-block ul li {
    position: relative;
    padding-left: 1.8rem;
    margin-bottom: 1rem;
    line-height: 1.6;
    font-size: 1rem;
    color: white;
}

.instructions-block ul li::before {
    content: '\2022';
    position: absolute;
    left: 0;
    font-weight: bold;
    font-size: 1.2em;
    line-height: 1;
    color: white;
}

/* GRADIENT BACKGROUNDS */
.before-operation {
    background: linear-gradient(to right, #a0aec0, #718096);
}

.after-operation {
    background: linear-gradient(to right, #3498db, #2980b9);
}

/* RESPONSIVE MEDIA QUERIES */
@media (max-width: 1024px) {
    .header-content {
        font-size: 2.5rem;
    }

    .instructions-block h3 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .header-section {
        padding: 3rem 1.5rem;
        min-height: 250px;
    }

    .header-content {
        font-size: 2.2rem;
    }

    .content-wrapper h2 {
        font-size: 2.2rem;
    }

    .instructions-block {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .header-section {
        padding: 2rem 1rem;
        min-height: 200px;
    }

    .header-content {
        font-size: 1.8rem;
    }

    .content-wrapper h2 {
        font-size: 1.8rem;
    }

    .instructions-block h3 {
        font-size: 1.6rem;
    }

    .instructions-block ul li {
        font-size: 0.95rem;
    }
}