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

body {
    font-family: 'Roboto', 'SF Pro', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.tantrung-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.tantrung-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.tantrung-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
}

.tantrung-company-logo {
    width: 180px;
    height: 60px;
    background-image: url('img/company-logo.png');
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center;
}

.tantrung-nav-links {
    display: flex;
    list-style: none;
}

.tantrung-nav-item {
    position: relative;
    margin: 0 15px;
}

.tantrung-nav-item a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    padding: 10px 0;
    transition: color 0.3s ease;
}

.tantrung-nav-item a:hover {
    color: #0078d4;
}

.tantrung-nav-item.tantrung-active > a {
    color: #0078d4;
}

.tantrung-dropdown {
    position: relative;
}

.tantrung-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 240px;
    background-color: #fff;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    list-style: none;
}

.tantrung-dropdown:hover .tantrung-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.tantrung-dropdown-menu li {
    padding: 0;
}

.tantrung-dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: #333;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.tantrung-dropdown-menu li a:hover {
    background-color: #f5f9ff;
    color: #0078d4;
}

.tantrung-dropdown-menu li.tantrung-active a {
    background-color: #f0f5ff;
    color: #0078d4;
    font-weight: 600;
}

.tantrung-nav-cta {
    margin-left: 20px;
}

.tantrung-button {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s ease;
}

.tantrung-button-primary {
    background-color: #0078d4;
    color: #fff;
    border: 2px solid #0078d4;
}

.tantrung-button-primary:hover {
    background-color: #0062ad;
    border-color: #0062ad;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 120, 212, 0.2);
}

.tantrung-button-secondary {
    background-color: transparent;
    color: #0078d4;
    border: 2px solid #0078d4;
}

.tantrung-button-secondary:hover {
    background-color: #f0f8ff;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 120, 212, 0.1);
}

/* Hero Section */
.tantrung-hero {
    position: relative;
    height: 600px;
    margin-top: 90px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.tantrung-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

.tantrung-tech-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.4));
    z-index: -1;
}

.tantrung-hero-content {
    max-width: 800px;
    margin-left: 80px;
    padding: 40px;
    color: #fff;
    z-index: 1;
}

.tantrung-hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.tantrung-hero-subtitle {
    font-size: 1.4rem;
    font-weight: 400;
    max-width: 600px;
}

/* Section Common Styles */
.tantrung-section {
    padding: 80px 0;
}

.tantrung-section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px;
}

.tantrung-section-title {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #222;
}

.tantrung-section-subtitle {
    font-size: 1.2rem;
    color: #666;
}

/* Service Overview Styles */
.tantrung-service-overview-section {
    background-color: #f8fafb;
    padding: 90px 0;
}

.tantrung-tech-overview {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.tantrung-overview-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.tantrung-overview-content p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    color: #444;
}

.tantrung-tech-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.tantrung-tech-card {
    background-color: #fff;
    border-radius: 12px;
    padding: 40px 30px;
    width: 340px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tantrung-tech-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 120, 212, 0.15);
}

.tantrung-tech-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 25px;
}

.tantrung-tech-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #222;
}

.tantrung-tech-card p {
    color: #555;
    font-size: 1rem;
    line-height: 1.6;
}

/* Technology Service Sections */
.tantrung-tech-service-section {
    padding: 90px 0;
}

.tantrung-tech-service-section:nth-child(odd) {
    background-color: #f8fafb;
}

.tantrung-service-cols {
    display: flex;
    align-items: center;
    gap: 60px;
}

.tantrung-service-cols-reverse {
    flex-direction: row-reverse;
}

.tantrung-service-col-content {
    flex: 1;
}

.tantrung-service-col-image {
    flex: 1;
}

.tantrung-service-header {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.tantrung-service-header-icon {
    margin-right: 20px;
}

.tantrung-service-header-icon img {
    width: 80px;
    height: auto;
}

.tantrung-service-title {
    font-size: 2rem;
    font-weight: 700;
    color: #222;
    margin-bottom: 5px;
}

.tantrung-service-subtitle {
    color: #666;
    font-size: 1.1rem;
    max-width: 500px;
}

.tantrung-service-description p {
    margin-bottom: 25px;
    font-size: 1.05rem;
    color: #444;
    line-height: 1.7;
}

.tantrung-service-features {
    list-style: none;
}

.tantrung-service-features li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.tantrung-service-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 16px;
    height: 16px;
    background-color: #0078d4;
    border-radius: 50%;
    opacity: 0.15;
}

.tantrung-service-features li::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 13px;
    width: 6px;
    height: 6px;
    background-color: #0078d4;
    border-radius: 50%;
}

.tantrung-service-col-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tantrung-service-col-image img:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* Development Process Section */
.tantrung-development-process-section {
    background: linear-gradient(135deg, #f4f9ff, #e6efff);
    padding: 100px 0;
}

.tantrung-process-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.tantrung-process-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background-color: rgba(0, 120, 212, 0.2);
    transform: translateX(-50%);
}

.tantrung-timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 80px;
    position: relative;
}

.tantrung-timeline-item:last-child {
    margin-bottom: 0;
}

.tantrung-timeline-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: #0078d4;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.tantrung-timeline-content {
    width: calc(50% - 50px);
    padding: 25px;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tantrung-timeline-item:nth-child(odd) .tantrung-timeline-content {
    margin-right: auto;
}

.tantrung-timeline-item:nth-child(even) .tantrung-timeline-content {
    margin-left: auto;
}

.tantrung-timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.tantrung-timeline-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 15px;
}

.tantrung-timeline-icon img {
    width: 60px;
    height: 60px;
}

.tantrung-timeline-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 15px;
    color: #222;
}

.tantrung-timeline-content p {
    color: #555;
    font-size: 1rem;
    line-height: 1.7;
    text-align: center;
}

/* Portfolio Section */
.tantrung-portfolio-section {
    background-color: #f8fafb;
    padding: 90px 0;
}

.tantrung-portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.tantrung-portfolio-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.tantrung-portfolio-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.tantrung-portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0));
    color: #fff;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.tantrung-portfolio-item:hover .tantrung-portfolio-overlay {
    transform: translateY(0);
}

.tantrung-portfolio-item:hover img {
    transform: scale(1.05);
}

.tantrung-portfolio-overlay h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.tantrung-portfolio-link {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    padding: 5px 0;
    border-bottom: 2px solid #0078d4;
}

.tantrung-portfolio-cta {
    text-align: center;
}

/* CTA Section */
.tantrung-cta-section {
    background: linear-gradient(135deg, #0078d4, #00a2ed);
    color: #fff;
    padding: 80px 0;
}

.tantrung-cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.tantrung-cta-content h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.tantrung-cta-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.tantrung-cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.tantrung-cta-section .tantrung-button-primary {
    background-color: #fff;
    color: #0078d4;
    border-color: #fff;
}

.tantrung-cta-section .tantrung-button-primary:hover {
    background-color: #f0f0f0;
    border-color: #f0f0f0;
    box-shadow: 0 6px 12px rgba(255, 255, 255, 0.2);
}

.tantrung-cta-section .tantrung-button-secondary {
    background-color: transparent;
    color: #fff;
    border-color: #fff;
}

.tantrung-cta-section .tantrung-button-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

/* Footer Styles */
.tantrung-footer {
    background-color: #222;
    color: #fff;
    padding: 60px 0 20px;
}

.tantrung-footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 50px;
    margin-bottom: 40px;
}

.tantrung-footer-brand {
    max-width: 400px;
}

.tantrung-footer .tantrung-company-logo {
    margin-bottom: 20px;
}

.tantrung-footer-desc {
    color: #bbb;
    font-size: 0.95rem;
    line-height: 1.6;
}

.tantrung-footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.tantrung-footer-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

.tantrung-footer-menu,
.tantrung-footer-contact {
    list-style: none;
}

.tantrung-footer-menu li,
.tantrung-footer-contact li {
    margin-bottom: 12px;
}

.tantrung-footer-menu a,
.tantrung-footer-contact a {
    color: #bbb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.tantrung-footer-menu a:hover,
.tantrung-footer-contact a:hover {
    color: #0078d4;
}

.tantrung-footer-contact li {
    color: #bbb;
    font-size: 0.95rem;
}

.tantrung-footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.tantrung-copyright {
    color: #999;
    font-size: 0.9rem;
}

.tantrung-social-links {
    display: flex;
    gap: 20px;
}

.tantrung-social-link {
    color: #bbb;
    text-decoration: none;
    transition: color 0.3s ease;
}

.tantrung-social-link:hover {
    color: #0078d4;
}

/* Responsive Styles */
@media screen and (max-width: 1024px) {
    .tantrung-navbar {
        padding: 15px 20px;
    }
    
    .tantrung-hero-content {
        margin-left: 40px;
    }
    
    .tantrung-hero-title {
        font-size: 2.5rem;
    }
    
    .tantrung-hero-subtitle {
        font-size: 1.2rem;
    }
    
    .tantrung-tech-cards {
        flex-direction: column;
        align-items: center;
    }
    
    .tantrung-service-cols {
        flex-direction: column;
        gap: 40px;
    }
    
    .tantrung-service-cols-reverse {
        flex-direction: column;
    }
    
    .tantrung-process-timeline::before {
        left: 20px;
    }
    
    .tantrung-timeline-dot {
        left: 20px;
    }
    
    .tantrung-timeline-content {
        width: calc(100% - 60px);
        margin-left: 40px !important;
    }
    
    .tantrung-portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (max-width: 768px) {
    .tantrung-hero {
        height: 500px;
    }
    
    .tantrung-hero-content {
        padding: 20px;
        margin-left: 20px;
    }
    
    .tantrung-section {
        padding: 60px 0;
    }
    
    .tantrung-section-title {
        font-size: 2rem;
    }
    
    .tantrung-tech-card {
        width: 100%;
        max-width: 340px;
    }
    
    .tantrung-footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .tantrung-footer-links {
        grid-template-columns: 1fr 1fr;
    }
    
    .tantrung-footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
}

@media screen and (max-width: 576px) {
    .tantrung-hero-title {
        font-size: 2rem;
    }
    
    .tantrung-portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .tantrung-cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .tantrung-footer-links {
        grid-template-columns: 1fr;
    }
    
    .tantrung-timeline-content {
        padding: 15px;
    }
}