/* =======================
   HEADER SECTION
========================== */
.header-section {
    position: relative;
    width: 100%;
    height: 400px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.header-section img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.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, 0.4));
    z-index: 1;
}

.header-content {
    position: relative;
    z-index: 2;
    color: white;
    font-size: 3rem;
    font-weight: bold;
    text-align: left;
    padding: 0 5rem;
    width: 100%;
    box-sizing: border-box;
}

/* =======================
   GENERAL CONTENT SECTION
========================== */
.content-section {
    background-color: #f3f4f6;
    padding: 4rem 2rem;
    display: flex;
    flex-direction: column;
}

.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

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

.content-wrapper h3 {
    font-size: 2rem;
    font-weight: bold;
    color: #3498db;
    margin-top: 2.5rem;
    margin-bottom: 1.5rem;
}

.content-wrapper h4 {
    font-size: 1.5rem;
    font-weight: bold;
    color: #3498db;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}

.content-wrapper p {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: 1rem;
    color: #555;
    text-align: justify;
}

/* =======================
   IMAGE-TEXT SECTION
========================== */
.image-text-section {
    display: flex;
    flex-direction: row;
    gap: 3rem;
    align-items: flex-start;
    background-color: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.image-text-section .image-placeholder {
    flex: 1;
    min-width: 300px;
    max-width: 70%;
    height: 300px;
    overflow: hidden;
}

.image-text-section .image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 0.5rem;
}

.image-text-section .text-content {
    flex: 2;
    color: #555;
}

.image-text-section .text-content h3 {
    color: #2c3e50;
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

.image-text-section .text-content p {
    margin-bottom: 1rem;
}

/* =======================
   TWO-COLUMN SECTION
========================== */
.two-column-section {
    background-color: #f3f4f6;
    padding: 2rem;
}

.two-column-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
}

.column-box {
    background: linear-gradient(to right, #e0f7fa, #b2ebf2);
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.column-box h3 {
    color: #2c3e50;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.column-box ul {
    list-style: none;
    padding: 0;
    margin-bottom: 1rem;
}

.column-box ul li {
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    position: relative;
    color: #555;
}

.column-box ul li::before {
    content: '\2022';
    color: #3498db;
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1.5em;
    position: absolute;
    left: 0;
}

.column-box p {
    color: #555;
}

/* =======================
   CONTENT BLOCK BOX
========================== */
.content-block-box {
    background-color: white;
    border-radius: 0.5rem;
    padding: 2rem;
    width: 1200px;
    max-width: 1200px;
    margin: 0 auto 2rem auto;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    color: #555;
    box-sizing: border-box;
}

.content-block-box h3 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.content-block-box ul {
    list-style: disc;
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.content-block-box ul li {
    margin-bottom: 0.5rem;
}

/* =======================
   HORIZONTAL LINE
========================== */
.horizontal-line {
    border: none;
    border-top: 1px solid #3498db;
    margin: 2rem 0;
}

/* =======================
   RESPONSIVE DESIGN
========================== */
@media (max-width: 1240px) {
    .content-block-box {
        width: 95%;
        max-width: 1200px;
    }
}

@media (max-width: 1024px) {
    .header-content {
        font-size: 2.8rem;
        padding: 0 4rem;
    }
}

@media (max-width: 768px) {
    .header-section {
        height: 300px;
    }

    .header-section::before {
        background: linear-gradient(to right, rgba(41, 128, 185, 0.8), rgba(52, 152, 219, 0.3));
    }

    .header-content {
        font-size: 2.5rem;
        padding: 0 2rem;
    }

    .image-text-section {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
        padding: 1.5rem;
    }

    .image-text-section .image-placeholder {
        max-width: 80%;
        min-width: unset;
    }

    .two-column-grid {
        grid-template-columns: 1fr;
    }

    .content-block-box {
        width: 90%;
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .header-section {
        height: 250px;
    }

    .header-section::before {
        background: linear-gradient(to bottom, rgba(41, 128, 185, 0.8), rgba(52, 152, 219, 0.3));
    }

    .header-content {
        font-size: 2rem;
        text-align: center;
        padding: 0 1rem;
    }

    .content-section,
    .two-column-section {
        padding: 2rem 1rem;
    }

    .image-text-section .image-placeholder {
        max-width: 100%;
    }

    .image-text-section .text-content {
        text-align: center;
    }

    .image-text-section .text-content h3 {
        font-size: 1.6rem;
    }

    .image-text-section .text-content p {
        font-size: 0.95rem;
    }

    .column-box {
        padding: 1.5rem;
    }

    .column-box h3 {
        font-size: 1.5rem;
        text-align: center;
    }

    .column-box ul li {
        font-size: 0.95rem;
    }

    .content-block-box {
        width: 95%;
        padding: 1rem;
    }

    .content-block-box h3 {
        font-size: 1.5rem;
        text-align: center;
    }

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