:root {
    --bg-color-dark: #161625;
    --surface-color-dark: #1e1e30;
    --primary-color-dark: #ffffff;
    --secondary-color-dark: #a9a9d4;
    --accent-color: #00c7b3;
    --accent-color-hover: #00a090;

    --bg-color-light: #f5f5f5;
    --surface-color-light: #ffffff;
    --primary-color-light: #161625;
    --secondary-color-light: #4a4a68;
    
    --font-family: 'Poppins', sans-serif;
    --transition-speed: 0.3s ease;
}

[data-theme="dark"] {
    --bg-color: var(--bg-color-dark);
    --surface-color: var(--surface-color-dark);
    --primary-color: var(--primary-color-dark);
    --secondary-color: var(--secondary-color-dark);
}

[data-theme="light"] {
    --bg-color: var(--bg-color-light);
    --surface-color: var(--surface-color-light);
    --primary-color: var(--primary-color-light);
    --secondary-color: var(--secondary-color-light);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--primary-color);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

body.modal-active {
    overflow: hidden;
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.2;
}

header {
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 100;
    background-color: rgba(22, 22, 37, 0.8);
    backdrop-filter: blur(10px);
    transition: var(--transition-speed);
}
header.scrolled {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] header {
     background-color: rgba(255, 255, 255, 0.8);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
}

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

nav ul li a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 400;
    position: relative;
    padding-bottom: 5px;
    transition: color var(--transition-speed);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-color);
    transition: width var(--transition-speed);
}

nav ul li a:hover {
    color: var(--accent-color);
}

nav ul li a:hover::after {
    width: 100%;
}

.controls-container {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#lang-switcher {
    display: flex;
    gap: 0.5rem;
    background-color: var(--surface-color);
    border-radius: 20px;
    padding: 4px;
}
[data-theme="light"] #lang-switcher {
    background-color: var(--bg-color-light);
    border: 1px solid var(--surface-color-dark);
}


#lang-switcher button {
    background: none;
    border: none;
    color: var(--secondary-color);
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 16px;
    cursor: pointer;
    transition: all var(--transition-speed);
}

#lang-switcher button.active {
    background-color: var(--accent-color);
    color: #fff;
}
[data-theme="light"] #lang-switcher button.active {
    color: var(--bg-color-dark);
}
[data-theme="light"] #lang-switcher button {
    color: var(--secondary-color-light);
}

#theme-toggle {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color var(--transition-speed), transform var(--transition-speed);
}
#theme-toggle:hover {
    color: var(--accent-color);
    transform: rotate(15deg);
}

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 2.5rem; 
    margin-bottom: 1rem;
    font-weight: 400; 
    color: var(--secondary-color);
}

.hero h1 .hero-name {
    font-size: 4.5rem; 
    font-weight: 700;
    color: var(--primary-color);
    display: block; 
    line-height: 1.2;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="light"] .hero h1 .hero-name {
     background: none;
    -webkit-background-clip: initial;
    -webkit-text-fill-color: initial;
    background-clip: initial;
    color: var(--accent-color);
}

.hero p {
    font-size: 1.3rem; 
    color: var(--secondary-color);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.hero-cta-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.content-section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.content-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--accent-color);
}

.cta-button {
    display: inline-block;
    padding: 12px 28px;
    background-color: var(--accent-color);
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color var(--transition-speed), transform var(--transition-speed), box-shadow var(--transition-speed);
    border: 2px solid var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(0, 199, 179, 0.15);
}

.cta-button:hover {
    background-color: var(--accent-color-hover);
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 199, 179, 0.3);
}

.cta-button.secondary {
    background-color: transparent;
    color: var(--accent-color);
    box-shadow: none;
}

.cta-button.secondary:hover {
    background-color: rgba(0, 199, 179, 0.1);
    color: var(--accent-color);
    box-shadow: none;
    transform: translateY(-4px);
}

.about-container {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.about-image {
    flex-shrink: 0;
}

.about-image img {
    width: 250px;
    height: 250px;
    object-fit: cover;
    border-radius: 50%;
    border: 5px solid var(--surface-color);
    box-shadow: 0 0 20px rgba(0, 199, 179, 0.2);
}

.about-text h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: var(--accent-color);
}

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

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    background-color: var(--surface-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    aspect-ratio: 4 / 3;
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease-out;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(22, 22, 37, 0.95), rgba(22, 22, 37, 0.2));
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;
    text-align: left;
    padding: 1.5rem;
    opacity: 1; 
    transition: background var(--transition-speed);
}

.portfolio-item:hover .portfolio-overlay {
    background: linear-gradient(to top, rgba(0, 199, 179, 0.8), rgba(22, 22, 37, 0.1));
}

.portfolio-overlay h3 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.portfolio-overlay p {
    font-size: 0.9rem;
}

.contact-subtitle {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem auto;
    color: var(--secondary-color);
}
.contact-container {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
}
.contact-form {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--surface-color);
    background-color: var(--surface-color);
    border-radius: 5px;
    color: var(--primary-color);
    font-family: var(--font-family);
    transition: border-color var(--transition-speed);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.contact-form button {
    align-self: flex-start;
    border: none;
    cursor: pointer;
}

footer {
    text-align: center;
    padding: 2rem;
    background-color: var(--surface-color);
    color: var(--secondary-color);
    font-size: 0.9rem;
}

#scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background-color: var(--accent-color);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-speed);
}

#scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 200;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-speed), visibility var(--transition-speed);
}
.modal-backdrop.open {
    opacity: 1;
    visibility: visible;
}
.modal-content {
    background-color: var(--surface-color);
    padding: 2.5rem;
    border-radius: 10px;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.95);
    transition: transform var(--transition-speed);
}
.modal-backdrop.open .modal-content {
    transform: scale(1);
}
.close-modal-btn {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 2.5rem;
    cursor: pointer;
    line-height: 1;
}
.modal-content img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 1.5rem;
}
.modal-content h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}
.modal-content p {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}
.modal-content h4 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
}
.modal-content a.cta-button {
    margin-top: 2rem;
}

.fade-in {
    opacity: 0;
    animation: fadeInAnimation 1s ease-out forwards;
}

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

.scroll-down-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--primary-color);
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

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

.skills-section {
    background-color: var(--surface-color);
}
[data-theme="light"] .skills-section {
    background-color: #eef2f9;
}
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}
.skill-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: transform var(--transition-speed);
}
.skill-card:hover {
    transform: translateY(-5px);
}
.skill-card i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}
.skill-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}
.skill-card p {
    color: var(--secondary-color);
    font-size: 0.9rem;
}


.social-links-contact {
    flex-basis: 300px;
    padding-left: 2rem;
    margin-top: 2rem;
}
.social-links-contact p {
    font-weight: 600;
    margin-bottom: 1.5rem;
}
.social-links-contact a {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    transition: color var(--transition-speed);
}
.social-links-contact a:hover {
    color: var(--accent-color);
}
.social-links-contact i {
    font-size: 1.8rem;
    width: 30px; 
    text-align: center;
    color: var(--accent-color);
}

.modal-context {
    background-color: rgba(0, 199, 179, 0.1);
    border-left: 3px solid var(--accent-color);
    padding: 10px 15px;
    margin: 1.5rem 0;
    border-radius: 5px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.tech-tags span {
    background-color: var(--accent-color);
    color: #fff;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}
[data-theme="light"] .tech-tags span {
    background-color: var(--bg-color-dark);
}

#form-status { margin-top: 1rem; padding: 10px; border-radius: 5px; text-align: center; font-weight: 600; display: none; }
#form-status.success { display: block; background-color: rgba(0, 199, 179, 0.2); color: var(--accent-color); border: 1px solid var(--accent-color); }
#form-status.error { display: block; background-color: rgba(233, 69, 96, 0.2); color: #e94560; border: 1px solid #e94560; }

@media (max-width: 992px) {
    .hero h1 { font-size: 2rem; }
    .hero h1 .hero-name { font-size: 3.5rem; }
    .hero p { font-size: 1.2rem; }
    .about-container { flex-direction: column; text-align: center; }
    .about-image img { margin-bottom: 2rem; }
    .contact-container { flex-direction: column; align-items: center; }
    .social-links-contact { padding-left: 0; margin-top: 2rem; text-align: center; }
    .social-links-contact a { justify-content: center; }
}

@media (max-width: 768px) {
    nav ul { display: none; }
    nav { padding: 1rem; }
    .controls-container { gap: 1rem; }
    #lang-switcher { gap: 0.25rem; padding: 2px; }
    #lang-switcher button { padding: 4px 8px; font-size: 0.75rem; }
    #theme-toggle { font-size: 1.3rem; }
    .hero { padding: 0 1rem; }
    .hero h1 { font-size: 1.8rem; }
    .hero h1 .hero-name { font-size: 3rem; line-height: 1.1; }
    .hero p { font-size: 1.1rem; }
    .hero-cta-container { gap: 1rem; flex-direction: column; align-items: stretch; }
    .cta-button { width: 100%; text-align: center; }
    .section-title { font-size: 2rem; }
    .portfolio-grid { grid-template-columns: 1fr; }
    .modal-content { padding: 2rem 1.5rem; }
    .modal-content h3 { font-size: 1.5rem; }
}

/* Contact form and social links enhancements */
.contact-form { padding: 0; border: none; background: transparent; border-radius: 0; box-shadow: none; }
.contact-form input,
.contact-form textarea {
    padding: 14px 16px;
    font-size: 1rem;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 10px;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}
.contact-form button {
    width: auto;
}
[data-theme="light"] .contact-form input,
[data-theme="light"] .contact-form textarea {
    border-color: rgba(0,0,0,0.12);
    background: #fff;
}
.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 199, 179, 0.15);
}
.social-links-contact a {
    padding: 10px 14px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    background-color: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
}
[data-theme="light"] .social-links-contact a {
    border-color: #e9e9ef;
    background-color: #fff;
}
.social-links-contact a[aria-label="WhatsApp"] i { color: #25D366; }
.social-links-contact a[aria-label="Viber"] i { color: #7360F2; }
.social-links-contact a[aria-label="LinkedIn"] i { color: #0A66C2; }
.social-links-contact a[aria-label="Gmail"] i { color: #EA4335; }

@media (max-width: 768px) {
    .contact-form { padding: 0; }
    .contact-form button { width: 100%; margin-top: 0.25rem; }
    .social-links-contact { width: 100%; }
    .social-links-contact a { padding: 12px; }
}

@media (max-width: 600px) {
    .social-links-contact {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }
    .social-links-contact p {
        grid-column: 1 / -1;
    }
}