:root {
    /* colors */
    --bg-primary: #0c1a35;
    --bg-secondary: rgba(12, 26, 53, 0.8);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --accent-blue: #3b82f6;
    --accent-light: #93c5fd;
    --border-color: rgba(147, 197, 253, 0.2);
    --card-bg: rgba(30, 64, 175, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    transition: all 0.3s ease;
}

/* Plexus Background */
.plexus-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.plexus-background canvas {
    width: 100%;
    height: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-size: 1.5em;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 20px;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.95em;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.2);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

/* PWA Install Button in Nav */
.install-nav-btn {
    background: var(--accent-blue);
    color: #fff;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.install-nav-btn:hover {
    background-color: #2563eb;
    transform: translateY(-2px);
}


/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5em;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.mobile-menu-toggle:hover {
    color: var(--accent-blue);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 80px 20px 20px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

.hero-subtitle {
    color: var(--accent-light);
    font-size: clamp(1em, 2vw, 1.1em);
    font-weight: 600;
    margin-bottom: 15px;
}

.hero-title {
    font-size: clamp(2em, 6vw, 3.5em);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: clamp(1em, 2.5vw, 1.2em);
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    padding: 12px 24px;
    border-radius: 12px;
    font-size: clamp(0.9em, 2vw, 1em);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, #1e40af, #1d4ed8);
    color: white;
    border: none;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

/* Hero Image */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-container {
    position: relative;
    width: min(350px, 80vw);
    height: min(350px, 80vw);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

.circle-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0090FF, #3b82f6);
    border-radius: 50%;
    box-shadow: 
        0 25px 50px rgba(30, 64, 175, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { 
        box-shadow: 
            0 25px 50px rgba(30, 64, 175, 0.3),
            inset 0 1px 0 rgba(255, 255, 255, 0.1),
            0 0 0 0 rgba(59, 130, 246, 0.4);
    }
    50% { 
        box-shadow: 
            0 35px 70px rgba(30, 64, 175, 0.4),
            inset 0 1px 0 rgba(255, 255, 255, 0.2),
            0 0 40px 10px rgba(59, 130, 246, 0.2);
    }
}

.profile-image {
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.2);
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    transition: transform 0.5s ease;
}

.profile-image:hover img {
    transform: scale(1.1);
}

.decorative-dots {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 60px;
    height: 60px;
    background-image: radial-gradient(circle, rgba(147, 197, 253, 0.6) 2px, transparent 2px);
    background-size: 12px 12px;
    border-radius: 12px;
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Generic Section Styles */
.section-padding {
    padding: clamp(60px, 10vw, 100px) 20px;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.section-title {
    font-size: clamp(2em, 5vw, 2.5em);
    font-weight: 800;
    margin-bottom: 40px;
    background: linear-gradient(135deg, var(--accent-light), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

/* About Section */
#about .section-title {
    text-align: left;
}

.about-grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
    gap: clamp(30px, 5vw, 60px);
    align-items: center;
}

.about-image-container {
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    border: 2px solid var(--border-color);
    transition: transform 0.4s ease-out;
}

.about-image-container:hover {
    transform: scale(1.03);
}

.about-image-container img {
    width: 100%;
    display: block;
}

.about-text-content .section-title {
    font-size: clamp(2em, 4vw, 2.8em);
    margin-bottom: 20px;
}

.about-text-content p {
    color: var(--text-secondary);
    font-size: clamp(1em, 2vw, 1.1em);
    line-height: 1.7;
    margin-bottom: 1em;
}

.about-text-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Contact Section */
#contact .container {
    max-width: 800px;
}

.contact-social-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 40px;
    padding: 40px 0;
}

.social-logo-link {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(30, 64, 175, 0.2);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-blue);
    font-size: 2.5em;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.social-logo-link::before {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-light));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.social-logo-link:hover {
    transform: translateY(-8px) scale(1.1);
    border-color: var(--accent-blue);
    box-shadow: 0 15px 30px rgba(59, 130, 246, 0.4);
    color: white;
}

.social-logo-link:hover::before {
    opacity: 1;
}

.contact-subtitle {
    font-size: clamp(1.3em, 3vw, 1.6em);
    font-weight: 700;
    color: var(--accent-light);
    margin-bottom: 25px;
    text-align: center;
}

.contact-form-container {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: clamp(25px, 5vw, 40px);
}

.contact-form {
    max-width: 100%;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label,
.form-label {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
    font-size: clamp(0.9em, 2vw, 1em);
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form select,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: clamp(0.95em, 2vw, 1em);
    transition: all 0.3s ease;
}

.contact-form input[type="text"]:focus,
.contact-form input[type="email"]:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.contact-form select {
    cursor: pointer;
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.radio-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: clamp(0.9em, 2vw, 1em);
}

.radio-label input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-blue);
}

.form-submit-btn {
    width: 100%;
    justify-content: center;
    font-size: clamp(1em, 2vw, 1.1em);
    padding: 14px 24px;
    margin-top: 10px;
}

/* Footer */
.footer {
    padding: 30px 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1;
}

.footer-text {
    color: var(--text-secondary);
    font-size: clamp(0.85em, 1.5vw, 0.95em);
}

/* Animations */
@keyframes fadeInUp {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
    0% { opacity: 0; transform: translateX(-50px); }
    100% { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    0% { opacity: 0; transform: translateX(50px); }
    100% { opacity: 1; transform: translateX(0); }
}

/* PWA Features Badges */
.pwa-features {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.pwa-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(30, 64, 175, 0.2);
    border: 1px solid rgba(147, 197, 253, 0.3);
    border-radius: 20px;
    color: var(--accent-light);
    font-size: 0.9em;
    font-weight: 600;
    transition: all 0.3s ease;
}

.pwa-badge:hover {
    background: rgba(59, 130, 246, 0.3);
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.pwa-badge i {
    font-size: 1.1em;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .nav-links {
        gap: 15px;
    }
    .nav-links a {
        font-size: 0.9em;
        padding: 6px 12px;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 60px; /* Sesuaikan dengan tinggi navbar Anda */
        left: 0;
        right: 0;
        background: var(--bg-primary);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        
        /* Tambahkan ini untuk animasi */
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: max-height 0.4s ease-out, opacity 0.4s ease-out;
    }
    
    .nav-links.active {
        max-height: 500px; /* Atau tinggi lain yang cukup */
        opacity: 1;
    }
    
    .nav-links li {
        width: 100%;
    }
    
    .nav-links a, .install-nav-btn {
        display: block;
        padding: 15px 20px;
        width: 100%;
        text-align: center;
        border-radius: 8px;
        margin-bottom: 5px;
    }
    
    .install-nav-btn {
        justify-content: center;
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-image {
        order: -1;
    }

    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    #about .section-title {
        text-align: center;
    }
    
    .about-text-content p {
        text-align: justify !important;
        text-justify: inter-word;
        hyphens: auto;
        -webkit-hyphens: auto;
        -moz-hyphens: auto;
        -ms-hyphens: auto;
    }
    
    .about-image-container {
        max-width: 300px;
        margin: 0 auto;
    }

    .hero-buttons {
        justify-content: center;
    }
    
    .pwa-features {
        justify-content: center;
    }

    .social-logo-link {
        width: 70px;
        height: 70px;
        font-size: 2.2em;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 15px;
    }
    
    .hero-section {
        padding-top: 80px;
    }

    .section-padding {
        padding: 60px 15px;
    }
    
    .hero-buttons {
        gap: 15px;
    }
    
    .btn-primary, .btn-secondary {
        padding: 10px 20px;
        font-size: 0.9em;
    }
    
    .image-container {
        width: min(250px, 70vw);
        height: min(250px, 70vw);
    }
    
    .decorative-dots {
        width: 40px;
        height: 40px;
        top: -15px;
        right: -15px;
        background-size: 8px 8px;
    }
    
    .contact-card {
        padding: 25px 15px;
    }

    .social-logo-link {
        width: 60px;
        height: 60px;
        font-size: 2em;
    }
}

/* High DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 2dppx) {
    .profile-image img,
    .about-image-container img {
        image-rendering: -webkit-optimize-contrast;
    }
}

/* Reduced motion accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .image-container {
        animation: none;
    }
    
    .decorative-dots {
        animation: none;
    }
}