* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #3498db;
    --secondary-turquoise: #1abc9c;
    --dark-blue: #2980b9;
    --light-blue: #85c1e9;
    --background-light: #f8f9fa;
    --background-white: #ffffff;
    --text-dark: #2c3e50;
    --text-medium: #5d6d7e;
    --text-light: #95a5a6;
    --border-light: #e0e0e0;
    --accent-blue: #5dade2;
    --hover-blue: #2874a6;
    --shadow-soft: rgba(52, 152, 219, 0.15);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-light);
    color: var(--text-dark);
    line-height: 1.6;
    font-size: 15px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.site-header {
    background: linear-gradient(180deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--background-white);
    padding: 18px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px var(--shadow-soft);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    color: var(--background-white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.main-nav {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.main-nav a {
    color: var(--background-white);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.25s;
}

.main-nav a:hover {
    border-bottom-color: var(--background-white);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--background-white);
    font-size: 22px;
    cursor: pointer;
    padding: 5px;
}

.banner-area {
    background: var(--primary-blue);
    color: var(--background-white);
    padding: 75px 0;
    text-align: center;
    margin-bottom: 45px;
}

.banner-area h1 {
    font-size: 42px;
    margin-bottom: 22px;
    font-weight: 700;
}

.banner-area p {
    font-size: 18px;
    opacity: 0.95;
    max-width: 850px;
    margin: 0 auto;
}

.banner-visual {
    width: 100%;
    max-width: 1200px;
    height: 400px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.column-image {
    width: 100%;
    max-width: 900px;
    height: 500px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 320px 280px;
    gap: 30px;
    margin-bottom: 50px;
}

.main-column {
    background: var(--background-white);
    padding: 40px;
    border-radius: 6px;
    box-shadow: 0 2px 10px var(--shadow-soft);
}

.main-column h2 {
    font-size: 30px;
    color: var(--primary-blue);
    margin-bottom: 24px;
    font-weight: 600;
}

.main-column h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin-top: 28px;
    margin-bottom: 16px;
    font-weight: 600;
}

.main-column h4 {
    font-size: 18px;
    color: var(--dark-blue);
    margin-top: 22px;
    margin-bottom: 12px;
    font-weight: 600;
}

.main-column p {
    margin-bottom: 16px;
    color: var(--text-medium);
}

.sidebar-left {
    background: var(--background-white);
    padding: 35px 28px;
    border-radius: 6px;
    box-shadow: 0 2px 10px var(--shadow-soft);
    height: fit-content;
}

.sidebar-right {
    background: var(--background-white);
    padding: 35px 28px;
    border-radius: 6px;
    box-shadow: 0 2px 10px var(--shadow-soft);
    height: fit-content;
}

.sidebar-title {
    font-size: 20px;
    color: var(--primary-blue);
    margin-bottom: 20px;
    font-weight: 600;
}

.sidebar-content {
    font-size: 14px;
    color: var(--text-medium);
    line-height: 1.7;
}

.cta-button {
    display: inline-block;
    background: var(--secondary-turquoise);
    color: var(--background-white);
    padding: 14px 32px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    font-size: 15px;
    transition: background 0.3s;
    margin-top: 20px;
}

.cta-button:hover {
    background: var(--primary-blue);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
    margin-top: 35px;
}

.blog-item {
    background: var(--background-white);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 10px var(--shadow-soft);
    transition: transform 0.3s, box-shadow 0.3s;
}

.blog-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px var(--shadow-soft);
}

.blog-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.blog-content {
    padding: 24px;
}

.blog-date {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.blog-title {
    font-size: 19px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
    line-height: 1.4;
}

.blog-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s;
}

.blog-title a:hover {
    color: var(--primary-blue);
}

.blog-excerpt {
    font-size: 14px;
    color: var(--text-medium);
    line-height: 1.6;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 35px;
}

.gallery-item {
    background: var(--background-white);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 10px var(--shadow-soft);
    transition: transform 0.3s;
}

.gallery-item:hover {
    transform: scale(1.03);
}

.gallery-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.gallery-caption {
    padding: 16px;
    font-size: 14px;
    color: var(--text-medium);
    text-align: center;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 26px;
    margin-top: 35px;
}

.contact-card {
    background: var(--background-white);
    padding: 32px 28px;
    border-radius: 6px;
    box-shadow: 0 2px 10px var(--shadow-soft);
    text-align: center;
}

.contact-icon {
    font-size: 40px;
    color: var(--primary-blue);
    margin-bottom: 16px;
}

.contact-card h3 {
    font-size: 17px;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.contact-card p {
    color: var(--text-medium);
    font-size: 14px;
}

.map-container {
    margin-top: 40px;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 10px var(--shadow-soft);
    height: 450px;
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.site-footer {
    background: var(--text-dark);
    color: var(--background-white);
    padding: 55px 0 25px;
    border-top: 4px solid var(--primary-blue);
    margin-top: 65px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 45px;
    margin-bottom: 32px;
}

.footer-section h4 {
    color: var(--accent-blue);
    font-size: 19px;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-size: 14px;
    line-height: 2.2;
    display: block;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: var(--accent-blue);
}

.social-icons {
    display: flex;
    gap: 12px;
    margin-top: 18px;
}

.social-icons a {
    width: 38px;
    height: 38px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
    font-size: 17px;
}

.social-icons a:hover {
    background: var(--primary-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 25px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.error-page {
    text-align: center;
    padding: 100px 0;
}

.error-number {
    font-size: 140px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 24px;
    line-height: 1;
}

.error-title {
    font-size: 36px;
    color: var(--text-dark);
    margin-bottom: 18px;
    font-weight: 600;
}

.error-text {
    font-size: 17px;
    color: var(--text-medium);
    margin-bottom: 32px;
}

@media (max-width: 1200px) {
    .content-wrapper {
        grid-template-columns: 1fr 280px;
    }
    
    .sidebar-right {
        display: none;
    }
}

@media (max-width: 992px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .sidebar-left {
        order: 2;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }

    .main-nav {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        background: var(--dark-blue);
        flex-direction: column;
        padding: 24px 0;
        transition: left 0.3s;
        gap: 0;
        box-shadow: 0 4px 12px var(--shadow-soft);
    }

    .main-nav.active {
        left: 0;
    }

    .main-nav li {
        width: 100%;
        text-align: center;
    }

    .main-nav a {
        display: block;
        padding: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .banner-area h1 {
        font-size: 28px;
    }

    .banner-area p {
        font-size: 16px;
    }

    .main-column {
        padding: 28px 22px;
    }

    .main-column h2 {
        font-size: 26px;
    }

    .blog-grid,
    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .error-number {
        font-size: 100px;
    }
}

.blog-detail {
    background: var(--background-white);
    padding: 45px 40px;
    border-radius: 6px;
    box-shadow: 0 2px 10px var(--shadow-soft);
    margin-top: 30px;
    margin-bottom: 50px;
}

.blog-header {
    margin-bottom: 30px;
}

.blog-meta-detail {
    display: flex;
    gap: 20px;
    margin-bottom: 18px;
    align-items: center;
}

.blog-date-detail {
    font-size: 14px;
    color: var(--text-light);
}

.blog-category {
    background: var(--secondary-turquoise);
    color: var(--background-white);
    padding: 5px 16px;
    border-radius: 22px;
    font-size: 13px;
    font-weight: 600;
}

.blog-detail h1 {
    font-size: 34px;
    color: var(--primary-blue);
    margin-bottom: 18px;
    font-weight: 600;
    line-height: 1.3;
}

.blog-subtitle {
    font-size: 18px;
    color: var(--text-medium);
    line-height: 1.7;
}

.blog-image-wrapper {
    margin: 30px 0;
    border-radius: 6px;
    overflow: hidden;
}

.blog-detail-image {
    width: 100%;
    height: auto;
    display: block;
}

.blog-content-detail {
    margin-top: 30px;
}

.blog-content-detail h2 {
    font-size: 28px;
    color: var(--primary-blue);
    margin-top: 30px;
    margin-bottom: 18px;
    font-weight: 600;
}

.blog-content-detail h3 {
    font-size: 22px;
    color: var(--text-dark);
    margin-top: 26px;
    margin-bottom: 15px;
    font-weight: 600;
}

.blog-content-detail p {
    margin-bottom: 18px;
    color: var(--text-medium);
    line-height: 1.8;
    text-align: justify;
}

.blog-footer {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--border-light);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--secondary-turquoise);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.back-link:hover {
    color: var(--primary-blue);
}

@media (max-width: 480px) {
    .banner-area {
        padding: 50px 0;
    }

    .banner-area h1 {
        font-size: 24px;
    }

    .main-column {
        padding: 22px 18px;
    }

    .main-column h2 {
        font-size: 22px;
    }

    .blog-detail {
        padding: 28px 22px;
    }

    .blog-detail h1 {
        font-size: 28px;
    }

    .blog-subtitle {
        font-size: 16px;
    }
}