:root {
    --bg-dark: #0a0a0a; 
    --bg-medium: #1a1a1a; 
    --bg-light: #2a2a2a; 
    --text-light: #f0f0f0; 
    --text-medium: #a0a0a0; 
    --neon-primary: #00e0ff; 
    --neon-secondary: #ff00bf; 
    --neon-accent: #39ff14;  

    --shadow-color-primary: rgba(0, 224, 255, 0.6);
    --shadow-color-secondary: rgba(255, 0, 191, 0.6);
    --shadow-color-accent: rgba(57, 255, 20, 0.6);

    
    --neon-primary-rgba: rgba(0, 224, 255, 0.7);
    --neon-secondary-rgba: rgba(255, 0, 191, 0.7);
    --neon-accent-rgba: rgba(57, 255, 20, 0.7);

    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Roboto', sans-serif;

    --transition-speed: 0.3s;
    --transition-effect: ease-in-out;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px; 
}

body {
    font-family: var(--font-secondary);
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden; 
}

a {
    color: var(--neon-primary);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-effect);
}

a:hover {
    color: var(--text-light);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.3;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.5rem; }

.section {
    padding: 100px 8% 60px; 
    min-height: 80vh;
    position: relative;
    overflow: hidden; 
    border-bottom: 1px solid rgba(255, 255, 255, 0.1); 
}

.section:last-of-type {
    border-bottom: none;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block; 
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-primary), var(--neon-secondary));
    box-shadow: 0 0 10px var(--shadow-color-primary), 0 0 10px var(--shadow-color-secondary);
    transition: width 0.5s var(--transition-effect);
}

.section-title:hover::after {
    width: 100%;
}


.neon-primary {
    color: var(--neon-primary);
    text-shadow: 0 0 5px var(--shadow-color-primary), 0 0 10px var(--shadow-color-primary);
}
.neon-secondary {
    color: var(--neon-secondary);
    text-shadow: 0 0 5px var(--shadow-color-secondary), 0 0 10px var(--shadow-color-secondary);
}
.neon-accent {
    color: var(--neon-accent);
    text-shadow: 0 0 5px var(--shadow-color-accent), 0 0 10px var(--shadow-color-accent);
}


.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(10, 10, 10, 0.8); 
    backdrop-filter: blur(10px); 
    transition: background-color var(--transition-speed) var(--transition-effect);
    border-bottom: 1px solid rgba(var(--neon-primary-rgba), 0.1); 
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 8%;
    height: 70px;
}

.nav-logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-light);
    transition: color var(--transition-speed) var(--transition-effect), text-shadow var(--transition-speed) var(--transition-effect);
}
.nav-logo:hover {
    color: var(--neon-primary);
    text-shadow: 0 0 8px var(--shadow-color-primary);
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-medium);
    font-weight: 400;
    position: relative;
    padding-bottom: 5px;
    transition: color var(--transition-speed) var(--transition-effect),
                text-shadow var(--transition-speed) var(--transition-effect),
                transform var(--transition-speed) var(--transition-effect); 
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--neon-primary);
    transition: width var(--transition-speed) var(--transition-effect);
    box-shadow: 0 0 8px var(--shadow-color-primary);
}

.nav-link:hover,
.nav-link.active 
 {
    color: var(--text-light);
    text-shadow: 0 0 5px var(--shadow-color-primary);
    transform: translateY(-2px); 
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}


.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-light);
    transition: all 0.3s ease-in-out;
    border-radius: 2px;
}


.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 5px;
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    font-size: 1rem;
    border: 2px solid transparent;
    transition: all var(--transition-speed) var(--transition-effect); 
}
.btn i {
    margin-right: 5px;
    
    transition: transform 0.2s ease-in-out; 
}

.btn:hover {
    transform: translateY(-3px) scale(1.02); 
    box-shadow: 0 8px 15px rgba(0,0,0,0.2); 
}
.btn:hover i {
    transform: translateX(3px); 
}


.btn-primary {
    background-color: var(--neon-primary);
    color: var(--bg-dark);
    border-color: var(--neon-primary);
    box-shadow: 0 0 10px var(--shadow-color-primary), inset 0 0 5px rgba(255, 255, 255, 0.3);
}
.btn-primary:hover {
    background-color: transparent;
    color: var(--neon-primary);
    box-shadow: 0 0 20px var(--shadow-color-primary), 0 5px 15px rgba(0,0,0,0.3);
}

.btn-secondary {
    background-color: var(--neon-secondary);
    color: var(--bg-dark);
    border-color: var(--neon-secondary);
    box-shadow: 0 0 10px var(--shadow-color-secondary), inset 0 0 5px rgba(255, 255, 255, 0.3);
}
.btn-secondary:hover {
    background-color: transparent;
    color: var(--neon-secondary);
    box-shadow: 0 0 20px var(--shadow-color-secondary), 0 5px 15px rgba(0,0,0,0.3);
}

.btn-outline {
    background-color: transparent;
    color: var(--neon-primary);
    border-color: var(--neon-primary);
}
.btn-outline:hover {
    background-color: var(--neon-primary);
    color: var(--bg-dark);
    box-shadow: 0 0 15px var(--shadow-color-primary), 0 5px 15px rgba(0,0,0,0.3);
}
.btn-outline i {
    margin-right: 5px; 
}



.home-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 100vh; 
    background: linear-gradient(rgba(10, 10, 10, 0.8), rgba(10, 10, 10, 0.9)), url('background-pattern.png') repeat; 
    position: relative; 
}


@keyframes rotateGlowBorder {
    0% { transform: rotate(0deg); opacity: 0.4; }
    50% { opacity: 0.8; }
    100% { transform: rotate(360deg); opacity: 0.4; }
}
.home-section::before,
.home-section::after { 
    content: '';
    position: absolute;
    width: 50px;
    height: 50px;
    border: 2px solid;
    opacity: 0.5;
    animation: rotateGlowBorder 12s linear infinite; 
}
.home-section::before {
    top: 80px;
    left: 20px;
    border-color: var(--neon-primary);
    box-shadow: 0 0 15px var(--shadow-color-primary);
    border-right: none;
    border-bottom: none;
}
.home-section::after {
    bottom: 60px;
    right: 20px;
    border-color: var(--neon-secondary);
    box-shadow: 0 0 15px var(--shadow-color-secondary);
    border-left: none;
    border-top: none;
}

.hero-content h1 {
    margin-bottom: 0.5rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.hero-content .subtitle {
    font-size: 1.5rem;
    color: var(--text-medium);
    margin-bottom: 1rem;
    font-weight: 300;
}
.hero-content .description {
     font-size: 1.1rem;
     color: var(--text-medium);
     max-width: 600px;
     margin: 0 auto 2rem;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap; 
    margin-top: 1rem;
}


.scroll-down-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 10;
}
.scroll-down-indicator a {
    color: var(--text-medium);
    font-size: 0.8rem;
    text-decoration: none;
    display: inline-block;
}
.scroll-down-indicator span {
    display: block;
    width: 1px;
    height: 30px;
    background: var(--neon-primary);
    margin: 0 auto 5px;
    animation: scrollPulse 2s infinite ease-in-out;
    box-shadow: 0 0 5px var(--shadow-color-primary);
}

@keyframes scrollPulse {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.5; transform: scaleY(0.7); }
}



.about-content {
    display: flex;
    flex-wrap: wrap; 
    gap: 3rem; 
    align-items: center; 
    max-width: 1000px;
    margin: 0 auto;
}

.about-text {
    flex: 2; 
    min-width: 300px; 
}
.about-text p {
    margin-bottom: 1rem;
    color: var(--text-medium);
}
.btn-cv-about {
    margin-top: 1.5rem; 
}

.about-image { 
    flex: 1; 
    min-width: 250px;
    text-align: center;
    max-width: 300px; 
    margin: 0 auto; 
}
.about-image img {
    border-radius: 10%;
    border: 3px solid var(--neon-secondary);
    box-shadow: 0 0 15px var(--shadow-color-secondary);
    width: 100%; 
    transition: transform var(--transition-speed) var(--transition-effect), box-shadow var(--transition-speed) var(--transition-effect), border-color var(--transition-speed) var(--transition-effect);
}
.about-image img:hover {
    transform: scale(1.05) rotate(3deg);
    box-shadow: 0 0 30px var(--shadow-color-secondary), 0 0 50px rgba(10, 10, 10, 0.4);
    border-color: var(--text-light); 
}


.education-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative; 
}





.education-item {
    background-color: var(--bg-medium);
    padding: 1.5rem 1.5rem 1.5rem 2rem; 
    margin-bottom: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--neon-primary);
    position: relative; 
    transition: transform var(--transition-speed) var(--transition-effect),
                box-shadow var(--transition-speed) var(--transition-effect),
                border-left-color var(--transition-speed) var(--transition-effect); 
}
.education-item:hover {
    transform: translateX(10px) scale(1.02); 
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4), 0 0 15px var(--shadow-color-primary);
    border-left-color: var(--neon-secondary); 
}

.education-item h3 {
    color: var(--neon-primary);
    margin-bottom: 0.3rem;
    font-size: 1.4rem;
}
.education-item .institution {
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 0.2rem;
}
.education-item .years {
    font-size: 0.9rem;
    color: var(--text-medium);
    margin-bottom: 0.5rem;
}


.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.skill-category {
    background-color: var(--bg-medium);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform var(--transition-speed) var(--transition-effect), box-shadow var(--transition-speed) var(--transition-effect);
}
.skill-category:hover {
    transform: translateY(-5px); 
    box-shadow: 0 10px 20px rgba(0,0,0, 0.3), 0 0 20px var(--shadow-color-accent);
}
.skill-category h3 {
    color: var(--neon-secondary);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--neon-secondary);
    padding-bottom: 0.5rem;
    display: inline-block;
    font-size: 1.3rem;
}
.skill-category ul li {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-medium);
    transition: color var(--transition-speed) var(--transition-effect), transform var(--transition-speed) var(--transition-effect);
     position: relative; 
}
.skill-category ul li:hover {
    color: var(--text-light);
    transform: translateX(5px); 
}
.skill-category ul li i {
    font-size: 1.2rem;
    width: 20px; 
    text-align: center;
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55); 
    
}
.skill-category ul li:hover i {
    transform: scale(1.3) rotate(5deg); 
}


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

.project-card {
    background-color: var(--bg-medium);
    border-radius: 8px;
    overflow: hidden; 
    border: 1px solid rgba(255, 255, 255, 0.1); 
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform var(--transition-speed) var(--transition-effect), box-shadow var(--transition-speed) var(--transition-effect), border-color var(--transition-speed) var(--transition-effect);
    display: flex;
    flex-direction: column;
}
.project-card:hover {
    transform: translateY(-12px) scale(1.01); 
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5), 0 0 25px var(--shadow-color-primary);
    border-color: var(--neon-primary-rgba); 
}

.project-image {
    width: 100%;
    height: 200px; 
    object-fit: cover; 
    opacity: 0.8;
    transition: opacity var(--transition-speed) var(--transition-effect), transform var(--transition-speed) var(--transition-effect);
}
.project-card:hover .project-image {
    opacity: 1;
    transform: scale(1.05); 
}

.project-info {
    padding: 1.5rem;
    flex-grow: 1; 
    display: flex;
    flex-direction: column;
}

.project-title {
    color: var(--neon-primary);
    margin-bottom: 0.5rem;
}
.project-description {
    color: var(--text-medium);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    flex-grow: 1; 
}
.project-tech {
    font-size: 0.85rem;
    color: var(--neon-secondary);
    margin-bottom: 1.5rem;
    font-weight: 500;
}
.project-tech strong {
    color: var(--text-light);
}
.project-links {
    display: flex;
    gap: 1rem;
    margin-top: auto; 
    flex-wrap: wrap; 
}
.project-links .btn {
    padding: 8px 18px;
    font-size: 0.9rem;
}
.project-links .btn i {
    margin-right: 5px;
}


.contact-section {
    padding-bottom: 100px; 
}

.contact-subtitle {
    text-align: center;
    color: var(--text-medium);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.contact-container {
    max-width: 1000px; 
    margin: 0 auto; 
    
}


.contact-links-wrapper {
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
    gap: 1.5rem; 
    margin-top: 2rem;
}

.contact-links-wrapper {
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
    gap: 1.5rem; 
    width: 100%; 
    padding: 1rem; 
}

.contact-link-item {
    background-color: var(--bg-medium);
    color: var(--text-medium);
    padding: 1.5rem 1rem;
    border-radius: 8px;
    text-align: center;
    border: 2px solid transparent; 
    transition: transform 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column; 
    justify-content: center; 
    align-items: center;
    gap: 0.75rem; 
    min-height: 150px; 
    flex: 0 0 auto; 
}

.contact-link-item i {
     
     margin-bottom: 0.5rem; 
     transition: transform 0.3s ease;
}

.contact-link-item span {
    font-size: 1rem;
    word-break: break-word; 
}
.contact-link-item span.contact-platform {
    font-size: 0.85rem;
    font-weight: 300;
    color: var(--text-medium);
    margin-top: auto; 
    padding-top: 0.5rem; 
}

.contact-link-item:hover {
    transform: translateY(-8px) scale(1.03);
    background-color: var(--bg-light);
    color: var(--text-light);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}
.contact-link-item:hover i {
    transform: scale(1.1);
}


.contact-link-item.neon-border-primary:hover {
    border-color: var(--neon-primary-rgba);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3), 0 0 15px var(--shadow-color-primary);
}
.contact-link-item.neon-border-secondary:hover {
    border-color: var(--neon-secondary-rgba);
     box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3), 0 0 15px var(--shadow-color-secondary);
}
.contact-link-item.neon-border-accent:hover {
    border-color: var(--neon-accent-rgba);
     box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3), 0 0 15px var(--shadow-color-accent);
}



.footer {
    text-align: center;
    padding: 2rem 5%;
    background-color: var(--bg-medium);
    color: var(--text-medium);
    font-size: 0.9rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.footer p {
    margin-bottom: 0.5rem;
}



@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in-down { animation: fadeInDown 0.8s ease-out forwards; opacity: 0; }
.animate-fade-in-up { animation: fadeInUp 0.8s ease-out forwards; opacity: 0; }

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }




@media (max-width: 992px) {
    html { font-size: 15px; }
    .section { padding: 80px 5% 50px; }
    .navbar { padding: 1rem 5%; }
    .project-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
    .contact-links-wrapper { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); } 
}


@media (max-width: 768px) {
    html { font-size: 14px; }
    h1 { font-size: 2.5rem; }
    h2 { font-size: 1.9rem; }

    
    .nav-menu {
        position: fixed;
        left: -100%; 
        top: 70px; 
        flex-direction: column;
        background-color: var(--bg-medium);
        width: 100%;
        height: calc(100vh - 70px);
        text-align: center;
        transition: left 0.4s ease-out; 
        gap: 1.5rem;
        padding-top: 2rem;
        z-index: 999; 
        box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        overflow-y: auto; 
    }
    .nav-menu.active {
        left: 0;
    }
    .nav-item {
        margin: 1rem 0;
    }
    .nav-link {
        font-size: 1.2rem;
        color: var(--text-light); 
    }
    .nav-link::after{ 
        left: 50%;
        transform: translateX(-50%);
    }
    .hamburger {
        display: block; 
    }
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
        background-color: var(--neon-primary);
    }
    .hamburger.active .bar:nth-child(3) {
         transform: translateY(-8px) rotate(-45deg);
         background-color: var(--neon-primary);
    }

    .home-section { min-height: 90vh; padding-top: 70px;} 
    .hero-content h1 { font-size: 2.8rem; }
    .hero-content .subtitle { font-size: 1.3rem; }

    .about-content { flex-direction: column; text-align: center; gap: 2rem; }
    .about-image img { margin: 0 auto 1.5rem; } 

    .skills-container { grid-template-columns: 1fr; } 
    .project-grid { grid-template-columns: 1fr; } 

    .contact-links-wrapper {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); 
        gap: 1rem;
    }
    .contact-link-item {
        padding: 1.2rem 0.8rem;
        min-height: 130px; 
    }
    .contact-link-item span {
        font-size: 0.9rem;
    }
     .contact-link-item span.contact-platform {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    html { font-size: 13px; }
    h1 { font-size: 2.2rem; }
    .section { padding: 60px 4% 40px; }
    .btn { padding: 10px 20px; font-size: 0.9rem;}
    .project-links { flex-direction: column; gap: 0.5rem; align-items: stretch;}
    .project-links .btn { width: 100%; }
    .contact-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 1.5rem;
    }

    @media (min-width: 992px) {
        .contact-container {
            display: flex;
            flex-wrap: nowrap;
            justify-content: space-between;
        }
            grid-template-columns: 1fr;
        }
    }
    .contact-container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 1rem;
    }
    .contact-links-wrapper {
        grid-template-columns: 1fr; 
        gap: 1rem;
    }
    .contact-link-item {
        padding: 1rem; 
        min-height: auto; 
    }
     .hero-buttons {
        flex-direction: column; 
        align-items: center; 
        gap: 0.8rem;
    }
     .hero-buttons .btn {
        width: 80%; 
        max-width: 300px;
    }
}