/* riset dan style  base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #0a0a23 0%, #1a1a3e 50%, #000 100%);
    background-attachment: fixed;
    color: white;
    overflow-x: hidden;
    line-height: 1.6;
}

/* kegunaan clas */
.container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(45deg, #64ffda, #a8edea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(45deg, #64ffda, #a8edea);
    margin: 1rem auto;
    border-radius: 2px;
}

/* navigasi stel */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(15px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(100, 255, 218, 0.1);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    background: rgba(0, 0, 0, 0.98);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    font-size: 2rem;
    font-weight: bold;
    color: #64ffda;
    animation: glow 2s ease-in-out infinite alternate;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

@keyframes glow {
    from { 
        text-shadow: 0 0 5px #64ffda, 0 0 10px #64ffda; 
    }
    to { 
        text-shadow: 0 0 10px #64ffda, 0 0 20px #64ffda, 0 0 30px #64ffda; 
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    font-weight: 500;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(100, 255, 218, 0.2), transparent);
    transition: left 0.5s;
}

.nav-link:hover::before {
    left: 100%;
}

.nav-link:hover {
    color: #64ffda;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(100, 255, 218, 0.3);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.hamburger:hover {
    background: rgba(100, 255, 218, 0.1);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #64ffda;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* section style base */
section {
    min-height: 100vh;
    padding: 8rem 0 5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* bagian home */
.home-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.home-text h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #64ffda, #a8edea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.home-text h2 {
    font-size: 2.5rem;
    color: #64ffda;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.home-text p {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    color: #e0e0e0;
}

.social-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, #64ffda, #a8edea);
    color: #0a0a23;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 1.2rem;
    position: relative;
}

.social-link:hover {
    transform: scale(1.2) rotate(360deg);
    box-shadow: 0 0 25px rgba(100, 255, 218, 0.6);
}

.social-link::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #64ffda, #a8edea, #64ffda);
    border-radius: 50%;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.home-image {
    text-align: center;
}

.profile-pic {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    border: 5px solid #64ffda;
    object-fit: cover;
    box-shadow: 0 0 40px rgba(100, 255, 218, 0.4);
    transition: all 0.3s ease;
}

.profile-pic:hover {
    transform: scale(1.05);
    box-shadow: 0 0 60px rgba(100, 255, 218, 0.6);
}

/* tentang saya */
.about {
    background: rgba(255, 255, 255, 0.02);
}

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

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.9;
    color: #e0e0e0;
}

/* skill */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.skill-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(100, 255, 218, 0.1), transparent);
    transition: left 0.5s;
}

.skill-card:hover::before {
    left: 100%;
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: #64ffda;
}

.skill-icon {
    font-size: 3rem;
    color: #64ffda;
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #64ffda;
}

.skill-card p {
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

.skill-progress {
    background: rgba(255, 255, 255, 0.1);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(45deg, #64ffda, #a8edea);
    border-radius: 4px;
    width: 0;
    transition: width 2s ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* edukasi */
.education {
    background: rgba(255, 255, 255, 0.02);
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, #64ffda, #a8edea);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    width: 50%;
}

.timeline-item.left {
    left: 0;
    padding-right: 2rem;
}

.timeline-item.right {
    left: 50%;
    padding-left: 2rem;
}

.timeline-content {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(100, 255, 218, 0.1);
    position: relative;
    transition: all 0.3s ease;
}

.timeline-content:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 20px;
    background: #64ffda;
    border-radius: 50%;
    transform: translateY(-50%);
    z-index: 1;
    box-shadow: 0 0 15px rgba(100, 255, 218, 0.5);
}

.timeline-item.left .timeline-content::before {
    right: -2.5rem;
}

.timeline-item.right .timeline-content::before {
    left: -2.5rem;
}

.timeline-year {
    background: linear-gradient(45deg, #64ffda, #a8edea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-size: 1.5rem;
    color: #64ffda;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    font-size: 1.2rem;
    color: #a8edea;
    margin-bottom: 1rem;
}

.timeline-content p {
    opacity: 0.9;
    line-height: 1.6;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(100, 255, 218, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: #64ffda;
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 200px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.project-content {
    padding: 2rem;
}

.project-content h3 {
    font-size: 1.5rem;
    color: #64ffda;
    margin-bottom: 1rem;
}

.project-tech {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tech-tag {
    background: linear-gradient(45deg, #64ffda, #a8edea);
    color: #0a0a23;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.project-content p {
    opacity: 0.9;
    line-height: 1.6;
    margin-bottom: 2rem;
}

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

.btn-demo, .btn-github {
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 25px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-demo {
    background: linear-gradient(45deg, #64ffda, #a8edea);
    color: #0a0a23;
}

.btn-github {
    background: transparent;
    border: 2px solid #64ffda;
    color: #64ffda;
}

.btn-demo:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(100, 255, 218, 0.3);
}

.btn-github:hover {
    background: #64ffda;
    color: #0a0a23;
    transform: translateY(-2px);
}

/* kontak */
.contact {
    background: rgba(255, 255, 255, 0.02);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(100, 255, 218, 0.1);
    border-radius: 10px;
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #64ffda;
    box-shadow: 0 0 20px rgba(100, 255, 218, 0.3);
}

.form-group label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
    pointer-events: none;
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:valid + label,
.form-group textarea:valid + label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.8rem;
    color: #64ffda;
    background: #0a0a23;
    padding: 0 0.5rem;
}

.submit-btn {
    background: linear-gradient(45deg, #64ffda, #a8edea);
    color: #0a0a23;
    padding: 1rem 2rem;
    border: none;
    border-radius: 25px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    align-self: center;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(100, 255, 218, 0.4);
}

.contact-social {
    text-align: center;
    margin-top: 4rem;
}

.contact-social h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: #64ffda;
}

.social-links-contact {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-link-contact {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(100, 255, 218, 0.3);
    border-radius: 50%;
    color: #64ffda;
    text-decoration: none;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.social-link-contact:hover {
    background: linear-gradient(45deg, #64ffda, #a8edea);
    color: #0a0a23;
    transform: translateY(-5px) rotate(360deg);
    box-shadow: 0 15px 30px rgba(100, 255, 218, 0.4);
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.8);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(100, 255, 218, 0.1);
}

.footer p {
    opacity: 0.7;
}

/* animasi */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* skrol animasi */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* mobile responsif */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(0, 0, 0, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        backdrop-filter: blur(15px);
        padding: 2rem 0;
        gap: 1rem;
    }

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

    .hamburger {
        display: flex;
    }

    .home-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .home-text h1 {
        font-size: 2.5rem;
    }

    .home-text h2 {
        font-size: 2rem;
    }

    .profile-pic {
        width: 250px;
        height: 250px;
    }

    .section-title {
        font-size: 2rem;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 3rem;
        padding-right: 0;
    }

    .timeline-item.right {
        left: 0;
        padding-left: 3rem;
    }

    .timeline-content::before {
        left: -2.5rem !important;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .project-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }

    .social-links {
        justify-content: center;
    }

    section {
        padding: 6rem 0 3rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .home-text h1 {
        font-size: 2rem;
    }

    .home-text h2 {
        font-size: 1.5rem;
    }

    .profile-pic {
        width: 200px;
        height: 200px;
    }

    .skill-card,
    .project-card,
    .timeline-content {
        margin: 0 0.5rem;
    }
}