/* Reset dan Base Styles */
:root {
    --primary: #1a5276;
    --primary-light: #2e86c1;
    --primary-dark: #154360;
    --secondary: #27ae60;
    --accent: #e67e22;
    --text: #2c3e50;
    --text-light: #566573;
    --background: #ffffff;
    --background-alt: #f8f9f9;
    --background-dark: #1b2631;
    --border: #d6dbdf;
}

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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: var(--background);
    overflow-x: hidden;
}

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

/* Header & Navigation */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-scrolled {
    padding: 5px 0;
    background-color: rgba(255, 255, 255, 0.98);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
    position: relative;
}

.nav-links a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a:hover:after {
    width: 100%;
}

.nav-links a.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-links a.active:after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
    color: white;
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%231a5276' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.1;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.2rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero p {
    font-size: 1.3rem;
    max-width: 600px;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--accent);
    color: white;
    box-shadow: 0 4px 12px rgba(230, 126, 34, 0.3);
}

.btn-primary:hover {
    background-color: #d35400;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(230, 126, 34, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* Sections */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
    position: relative;
    display: inline-block;
}

.section-header h2:after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.section-header p {
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* About Section */
.about {
    background-color: var(--background-alt);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.about-features {
    margin-top: 2rem;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.feature-icon {
    color: var(--secondary);
    font-weight: bold;
    margin-top: 3px;
    flex-shrink: 0;
}

.about-image {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    color: var(--text);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.08),
        0 0 0 1px rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

.about-image h4 {
    color: var(--primary-dark);
    margin-bottom: 2rem;
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    position: relative;
}

.about-image h4:after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
}

.about-image ul {
    list-style: none;
    display: grid;
    gap: 0.8rem;
}

.about-image li {
    padding: 1rem 1.2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 10px;
    border: 1px solid #f1f3f4;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.about-image li:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-light);
}

.about-image li:before {
    content: '•';
    margin-right: 12px;
    color: var(--secondary);
    font-weight: bold;
    font-size: 1.5rem;
}

/* Applications Section */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.application-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid var(--border);
}

.application-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.card-header {
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
}

.card-header h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.card-body {
    padding: 1.5rem;
}

.card-body p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.card-features {
    list-style: none;
}

.card-features li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-light);
}

.card-features li:before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* Research Section */
.research {
    background-color: var(--background-alt);
}

.research-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.research-text h3 {
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.research-text p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.research-areas {
    margin-top: 2rem;
}

.research-areas h4 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.area-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.area-item {
    background: white;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    border-left: 4px solid var(--secondary);
}

.research-image {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    color: var(--text);
    box-shadow: 
        0 4px 20px rgba(0, 0, 0, 0.08),
        0 0 0 1px rgba(0, 0, 0, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    height: fit-content;
}

.research-image h4 {
    color: var(--primary-dark);
    margin-bottom: 2rem;
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.research-image h4:before {
    content: '';
    font-size: 1.2rem;
}

.research-image h4:after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
}

.research-image ul {
    list-style: none;
    display: grid;
    gap: 0.8rem;
}

.research-image li {
    padding: 1rem 1.2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 10px;
    border: 1px solid #f1f3f4;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.research-image li:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-light);
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
}

.research-image li:before {
    content: '•';
    margin-right: 12px;
    font-size: 1.1rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: white;
    text-align: center;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%231a5276' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.1;
}

.cta-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* Footer */
footer {
    background-color: var(--background-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
    color: var(--accent);
}

.footer-section p, .footer-section a {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.8rem;
    display: block;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 992px) {
    .about-content, .research-content {
        grid-template-columns: 1fr;
    }

    .about-image, .research-image {
        order: -1;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        padding: 1rem 0;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        text-align: center;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .area-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero {
        padding: 140px 0 80px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    section {
        padding: 70px 0;
    }

    .section-header {
        margin-bottom: 3rem;
    }
}