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

/* Optimized Animations - GPU Accelerated */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Animation classes */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

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

/* Initial load animations */
nav {
    animation: fadeIn 0.6s ease;
}

.about {
    animation: fadeInUp 0.8s ease 0.2s both;
}

:root {
    --bg-color: hsl(214, 32%, 10%);
    --text-color: #fff;
    --text-light: rgba(255, 255, 255, 0.7);
    --border-color: rgba(255, 255, 255, 0.15);
    --bg-secondary: rgba(20, 30, 50, 0.18);
    --circle-1: hsl(217, 63%, 28%);
    --circle-2: hsl(314, 37%, 25%);
    --circle-3: hsl(217, 51%, 45%);
    --circle-4: hsl(315, 45%, 55%);
}

body.light-theme {
    --bg-color: hsl(0, 0%, 97%);
    --text-color: hsl(214, 32%, 15%);
    --text-light: rgba(0, 0, 0, 0.65);
    --border-color: rgba(0, 0, 0, 0.15);
    --bg-secondary: rgba(255, 255, 255, 0.4);
    --circle-1: hsl(217, 70%, 60%);
    --circle-2: hsl(314, 60%, 60%);
    --circle-3: hsl(217, 65%, 48%);
    --circle-4: hsl(315, 60%, 48%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    position: relative;
    padding-left: 30px;
    padding-right: 0;
    margin: 0;
    width: 100%;
    max-width: 100vw;
    transition: background-color 0.3s ease, color 0.3s ease;
}

@media (max-width: 968px) {
    body {
        padding-left: 8px;
    }
}

@media (max-width: 680px) {
    body {
        padding-left: 0;
    }
}

/* Background Circles - Starting from Skills Section */
.skills,
.projects,
.offer,
.contact {
    position: relative;
    z-index: 1;
}

.skills::before,
.projects::before,
.offer::before,
.contact::before,
.projects::after {
    content: '';
    position: absolute;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    filter: blur(200px);
    opacity: 0.6;
    pointer-events: none;
    z-index: -1;
}

/* Left corner circle - blue tone */
.skills::before,
.offer::before {
    background: radial-gradient(circle, var(--circle-3), var(--circle-1));
    left: -350px;
    top: 50%;
    transform: translateY(-50%);
}

/* Right corner circle - purple tone */
.projects::before {
    background: radial-gradient(circle, var(--circle-4), var(--circle-2));
    right: -350px;
    top: 25%;
    transform: translateY(-50%);
}

.contact::before {
    background: radial-gradient(circle, var(--circle-4), var(--circle-2));
    right: -350px;
    top: 75%;
    transform: translateY(-50%);
}

/* Additional blue circle for projects section (bottom-left) */
.projects::after {
    background: radial-gradient(circle, var(--circle-3), var(--circle-1));
    left: -250px;
    bottom: -300px;
    width: 650px;
    height: 650px;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background-color: transparent;
    position: relative;
    z-index: 100;
    margin-left: -36px;
    margin-right: 0;
}

@media (max-width: 968px) {
    nav {
        margin-left: -9px;
    }
}

@media (max-width: 680px) {
    nav {
        margin-left: -2px;
    }
}

.title-left h1 {
    font-size: 36px;
    color: var(--text-color);
    margin: 0;
    font-weight: 600;
}

/* Hamburger Menu - Mobile Only */
.hamburger {
    display: none;
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
        background: none;
        border: none;
        cursor: pointer;
        padding: 10px;
        z-index: 1001;
        -webkit-tap-highlight-color: transparent;
    }
    
    .hamburger .material-symbols-outlined {
        font-size: 32px;
        color: var(--text-color);
        transition: transform 0.2s ease;
    }
    
    .hamburger:active .material-symbols-outlined {
        transform: scale(0.9);
    }
    
    nav {
        padding: 15px 20px;
    }
    
    .title-left h1 {
        font-size: 24px;
    }
    
    .links-center {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-secondary);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        transition: right 0.3s ease;
        z-index: 1000;
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.3);
    }
    
    .links-center.active {
        right: 0;
    }
    
    .links-center ul {
        flex-direction: column;
        align-items: center;
        gap: 35px;
    }
    
    .links-center ul li a {
        font-size: 22px;
    }
    
    .controls-right {
        position: fixed;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%);
        flex-direction: column;
        gap: 20px;
        z-index: 1001;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }
    
    .controls-right.active {
        opacity: 1;
        pointer-events: auto;
    }
}

.links-center {
    flex-grow: 1;
    display: flex;
    justify-content: center;
}

.links-center ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.links-center ul li a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 19px;
    transition: color 0.3s ease;
    font-weight: 400;
    position: relative;
}

.links-center ul li a:hover {
    color: var(--circle-4);
}

.links-center ul li a.active {
    color: var(--circle-3);
}

.links-center ul li a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--circle-3);
}

.controls-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.toggle-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Toggle Switches */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.2);
    transition: 0.4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: hsl(315, 32%, 20%);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.toggle-icon {
    color: var(--text-color);
    font-size: 18px;
}

body.light-theme .toggle-icon {
    color: var(--text-color);
}

body.light-theme .slider:before {
    background-color: var(--circle-4);
}

.hamburger-menu {
    display: none;
}

/* About Section */
.about {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 60px;
    min-height: calc(100vh - 80px);
    padding-top: 0;
    padding-bottom: 0;
    position: relative;
}

.hero_left {
    flex: 1;
    max-width: 600px;
}

.light_text {
    font-size: 15px;
    color: var(--text-light);
    letter-spacing: 3px;
    margin-bottom: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.name {
    font-size: 64px;
    color: var(--text-color);
    margin-bottom: 12px;
    line-height: 1.1;
    font-weight: 700;
}

.developer {
    font-size: 32px;
    color: var(--circle-4);
    margin-bottom: 20px;
    font-weight: 500;
    line-height: 1.4;
}

.description {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 28px;
    font-weight: 300;
    max-width: 550px;
}

.contact_button {
    display: inline-block;
    padding: 16px 40px;
    background-color: var(--circle-3);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 17px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.contact_button:hover {
    background-color: var(--circle-3);
    filter: brightness(1.2);
}

.hero_right {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero_right::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--circle-3) 0%, var(--circle-4) 100%);
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.7;
    z-index: -1;
}

body.light-theme .hero_right::before {
    opacity: 0.6;
    filter: blur(120px);
}

.hero_right img {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    object-fit: cover;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .about {
        flex-direction: column;
        margin-top: 60px;
    }

    .hero_left {
        max-width: 100%;
    }

    .name {
        font-size: 48px;
    }

    .developer {
        font-size: 26px;
    }

    .description {
        font-size: 17px;
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    opacity: 1;
    transition: opacity 0.5s ease;
    z-index: 50;
}

.scroll-indicator.hidden {
    opacity: 0;
    pointer-events: none;
}

.scroll-indicator .material-symbols-outlined {
    font-size: 48px;
    color: var(--text-light);
    animation: bounce 2s infinite;
}

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

/* Skills Section */
.skills {
    padding: 80px 0;
    max-width: 1000px;
}

.skills h1 {
    font-size: 42px;
    margin-bottom: 60px;
    font-weight: 700;
}

.skill_subtitle,
.gameservers {
    font-size: 24px;
    margin-top: 50px;
    margin-bottom: 20px;
    font-weight: 600;
    color: var(--text-color);
}

.skill_subtitle:first-of-type {
    margin-top: 0;
}

.skill_frontend_grid,
.skill_backend_grid,
.skill_tools_grid,
.skill_gameservers_grid,
.skill_learning_grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 20px;
}

.skill_item {
    padding: 16px 28px;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 17px;
    font-weight: 500;
    color: var(--text-color);
    transition: all 0.15s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.skill_item:hover {
    background-color: var(--bg-secondary);
    border-color: var(--circle-3);
    transform: translateY(-2px);
    filter: brightness(1.1);
}

@media (max-width: 768px) {
    .skills {
        padding: 60px 0;
    }

    .skills h1 {
        font-size: 32px;
        margin-bottom: 40px;
    }

    .skill_subtitle,
    .gameservers {
        font-size: 20px;
        margin-top: 40px;
    }

    .skill_item {
        font-size: 15px;
        padding: 12px 20px;
    }
}

/* Projects Section */
.projects {
    padding: 80px 0;
    background: none;
}

.projects h1 {
    font-size: 42px;
    margin-bottom: 60px;
    font-weight: 700;
    color: var(--text-color);
}

.project_grid {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.project_item {
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 40px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.project_item:nth-child(even) {
    flex-direction: row-reverse;
}

.project_content {
    flex: 1;
}

.project_image {
    flex-shrink: 0;
    width: 450px;
    height: auto;
    border-radius: 8px;
    object-fit: contain;
    max-height: 300px;
}

.portfolio-preview {
    object-fit: cover;
    height: 280px;
}

.project_title {
    font-size: 32px;
    margin-bottom: 10px;
    font-weight: 700;
    color: var(--text-color);
}

.project_techorposition {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 15px;
    font-weight: 400;
}

.project_description {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-light);
    margin-bottom: 25px;
    font-weight: 300;
}

.project_link {
    display: inline-block;
    padding: 14px 32px;
    background-color: var(--circle-3);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
}

.project_link:hover {
    background-color: var(--circle-3);
    filter: brightness(1.2);
}

@media (max-width: 768px) {
    .projects {
        padding: 60px 0;
    }

    .projects h1 {
        font-size: 32px;
        margin-bottom: 40px;
    }

    .project_item,
    .project_item:nth-child(even) {
        flex-direction: column;
        padding: 30px;
    }

    .project_image {
        width: 100%;
    }

    .project_title {
        font-size: 26px;
    }
}

/* Offer Section */
.offer {
    padding: 80px 0;
}

.offer h1 {
    font-size: 42px;
    margin-bottom: 60px;
    font-weight: 700;
    color: var(--text-color);
}

.offer_grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.offer_item {
    text-align: center;
    padding: 40px 30px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.offer_icon {
    font-size: 72px;
    color: var(--circle-4);
    margin-bottom: 30px;
    display: block;
}

.offer_title {
    font-size: 22px;
    margin-bottom: 15px;
    font-weight: 600;
    color: var(--text-color);
}

.offer_description {
    font-size: 16px;
    line-height: 1.6;
    color: hsl(214, 20%, 70%);
    font-weight: 300;
}

@media (max-width: 768px) {
    .offer {
        padding: 60px 0;
    }

    .offer h1 {
        font-size: 32px;
        margin-bottom: 40px;
    }

    .offer_grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .offer_icon {
        font-size: 64px;
        margin-bottom: 25px;
    }
}

/* Contact Section */
.contact {
    padding: 80px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.contact-title {
    font-size: 42px;
    margin-bottom: 15px;
    font-weight: 700;
    color: var(--text-color);
}

.contact-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 50px;
    font-weight: 300;
}

#form-message {
    width: 100%;
    max-width: 600px;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    font-size: 16px;
    text-align: center;
    font-weight: 500;
}

#form-message.success {
    background-color: rgba(76, 175, 80, 0.1);
    color: #4caf50;
    border: 1px solid #4caf50;
}

#form-message.error {
    background-color: rgba(244, 67, 54, 0.1);
    color: #f44336;
    border: 1px solid #f44336;
}

#contact-form {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

#contact-form label {
    text-align: left;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: -12px;
}

.field-helper {
    text-align: left;
    font-size: 13px;
    color: var(--text-light);
    margin-top: -15px;
    font-weight: 300;
}

#contact-form input,
#contact-form select,
#contact-form textarea {
    width: 100%;
    padding: 14px 18px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    transition: border-color 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

#contact-form input:focus,
#contact-form select:focus,
#contact-form textarea:focus {
    outline: none;
    border-color: var(--circle-3);
}

#contact-form textarea {
    resize: none;
    min-height: 120px;
}

#contact-form select {
    cursor: pointer;
}

#contact-form option {
    background-color: var(--bg-color);
    color: var(--text-color);
}

.cf-turnstile {
    display: flex;
    justify-content: center;
}

#submit-btn {
    padding: 16px 40px;
    background-color: var(--circle-3);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 17px;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
}

#submit-btn:hover {
    filter: brightness(1.2);
}

@media (max-width: 768px) {
    .contact {
        padding: 60px 0;
    }

    .contact-title {
        font-size: 32px;
    }

    .contact-subtitle {
        font-size: 16px;
        margin-bottom: 35px;
    }

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

/* Social Links */
.menu_links_social {
    position: fixed;
    bottom: 40px;
    right: 40px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 100;
}

.menu_links_social h2 {
    display: none;
}

.social_link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social_link:hover {
    background-color: hsl(315, 32%, 20%);
    transform: translateY(-3px);
}

.social_icon {
    width: 24px;
    height: 24px;
    filter: invert(1);
}

body.light-theme .social_icon {
    filter: invert(0);
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 20px;
    background-color: transparent;
    color: var(--text-color);
    font-size: 14px;
    margin-top: 60px;
}

footer p {
    margin: 0;
    opacity: 0.8;
}

/* Move social links into contact section on small screens */
@media (max-width: 768px) {
    .menu_links_social {
        position: relative;
        bottom: auto;
        right: auto;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        margin-top: 30px;
    }

    .menu_links_social h2 {
        display: block;
        width: 100%;
        text-align: center;
        font-size: 18px;
        margin-bottom: 15px;
    }
}

/* Large Screen Optimization (2K and 4K) */
@media (min-width: 1923px) {
    body {
        padding-left: 80px;
        padding-right: 80px;
        font-size: 18px;
    }

    nav {
        padding: 25px 50px;
        margin-left: -80px;
        margin-right: -80px;
    }

    .title-left h1 {
        font-size: 42px;
    }

    .links-center ul li a {
        font-size: 21px;
    }

    .name {
        font-size: 76px;
    }

    .developer {
        font-size: 38px;
    }

    .description {
        font-size: 20px;
    }

    .contact_button {
        font-size: 19px;
        padding: 18px 48px;
    }

    .hero_right img {
        width: 400px;
        height: 400px;
    }

    .hero_right::before {
        width: 550px;
        height: 550px;
    }

    .skills h1,
    .projects h1,
    .offer h1,
    .contact-title {
        font-size: 48px;
    }

    .skill_subtitle,
    .gameservers {
        font-size: 28px;
    }

    .skill_item {
        font-size: 19px;
        padding: 18px 32px;
    }

    .project_title {
        font-size: 38px;
    }

    .project_techorposition {
        font-size: 17px;
    }

    .project_description {
        font-size: 20px;
    }

    .project_image {
        width: 350px;
        height: 240px;
    }

    .offer_icon {
        font-size: 80px;
    }

    .offer_title {
        font-size: 25px;
    }

    .offer_description {
        font-size: 18px;
    }

    .contact-subtitle {
        font-size: 20px;
    }

    #contact-form {
        max-width: 700px;
    }

    #contact-form label,
    #contact-form input,
    #contact-form select,
    #contact-form textarea {
        font-size: 18px;
    }
}

@media (min-width: 2563px) {
    body {
        padding-left: 100px;
        padding-right: 100px;
    }

    nav {
        margin-left: -100px;
        margin-right: -100px;
    }

    .name {
        font-size: 88px;
    }

    .developer {
        font-size: 44px;
    }

    .description {
        font-size: 22px;
    }
}