:root {

    --color-primary: #539dff; 
    --color-secondary: #c8c8c8; 
    --color-accent: #539dff; 
    
    --color-bg-main: #1e1e1e;
    --color-bg-light: #252526; 
    --color-text-dark: #d4d4d4; 
    --color-text-light: #fff; 
    
    --color-vsc-cyan: #4ec9b0; 
    --color-vsc-purple: #c586c0;

    --font-primary: 'Arial', sans-serif;
    --font-secondary: 'Helvetica Neue', sans-serif;

    --spacing-lg: 3rem;
    --spacing-md: 2rem;
    --spacing-sm: 1rem;
    --border-radius: 8px;
    --transition-speed: 0.3s;
}

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

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

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

a:hover {
    color: #fff;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-lg) 0;
}

.bg-light {
    background-color: var(--color-bg-light);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.section-subtitle {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-secondary);
    font-size: 1.1rem;
}

.navbar {
    background-color: var(--color-bg-main);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-primary);
}

.nav-links {
    list-style: none;
    display: none; 
    flex-direction: column;
    width: 100%;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-bg-main);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-links.active {
    display: flex; 
}

.nav-links li a {
    display: block;
    padding: 0.75rem var(--spacing-md);
    color: var(--color-text-dark);
    font-weight: 500;
}
.nav-links li a:hover {
    color: #fff;
}

.hamburger {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 10;
}

.hamburger .bar {
    width: 100%;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 10px;
    transition: all var(--transition-speed) ease-in-out;
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}
.hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.hero-section {
    /* background: ; */
    position: relative;
    color: var(--color-text-light);
    padding: 8rem 0;
    text-align: center;
    min-height: 80vh; 
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.hero-section video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -1;
    transform: translate(-50%, -50%);
    object-fit: cover;
    opacity: .1;
}

.hero-content {
    animation: fadeIn 1.5s ease-out;
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: 0.5rem;
    font-family: var(--font-secondary);
}

.highlight-name {
    color: var(--color-accent);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--color-accent);
    display: inline-block;
    padding-bottom: 5px;
}

.hero-hook {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-group {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.form-message {
    display: none;
    text-align: center;
}
.form-message.success {
    display: block;
    color: #4ec9b0;
}
.form-message.error {
    display: block;
    color:#dc3545;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: bold;
    text-transform: uppercase;
    transition: all var(--transition-speed);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-text-dark);
    border-color: var(--color-accent);
    cursor: pointer;
}

.btn-primary:hover {
    background-color: #4796fd; 
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-light);
    border-color: var(--color-text-light);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

@keyframes float {
    0% {
        transform: translateY(0); 
    }
    50% {
        transform: translateY(-8px); 
    }
    100% {
        transform: translateY(0); 
    }
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: 0.5rem;
    font-family: var(--font-secondary);
    display: inline-block; 
    animation: float 4s ease-in-out infinite; 
}

.highlight-name {
    color: var(--color-accent);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.acerca-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: justify;
    padding: 0 var(--spacing-sm);
}

.acerca-content p {
    margin-bottom: 1rem;
}

.key-skills {
    list-style: none;
    padding-left: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1rem;
    justify-content: center;
}

.key-skills li {
    font-weight: 600;
    color: var(--color-primary);
}

.key-skills i {
    margin-right: 0.5rem;
}


.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.skill-item {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    background-color: var(--color-bg-main);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: transform var(--transition-speed);
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.html-color { color: #e34c26; }
.css-color { color: #264de4; }
.bootstrap-color { color: #7952b3; }
.js-color { color: #f7df1e; }
.php-color { color: #777bb4; }
.mysql-color { color: #00758f; }
.api-color { color: var(--color-primary); }

.progress-bar-container {
    height: 6px;
    background-color: var(--color-bg-light);
    border-radius: 3px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--color-accent);
    transition: width 1s ease-out; 
    border-radius: 3px;
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr; 
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.project-card {
    background-color: var(--color-bg-main);
    border-radius: var(--border-radius);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.4s, box-shadow 0.4s;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
}

.project-img {
    width: 100%;
    height: 250px; 
    object-fit: cover;
    transition: transform 0.5s;
}

.project-card:hover .project-img {
    transform: scale(1.05);
}

.project-info {
    padding: 12px;
}

.project-title {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.project-desc {
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.project-links {
    display: flex;
    gap: 10px;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.link-btn {
    flex-grow: 1;
    text-align: center;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    font-weight: 600;
    font-size: 0.9rem;
    border: 2px solid;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.live-demo {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    border-color: var(--color-primary);
}

.live-demo:hover {
    background-color: #0056b3;
    color: var(--color-text-light);
}

.github-code {
    background-color: var(--color-bg-main);
    color: var(--color-text-dark);
    border-color: var(--color-secondary);
}

.github-code:hover {
    background-color: var(--color-bg-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.link-btn i {
    margin-right: 5px;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
}

.contact-form-container, .social-links-container {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    background-color: var(--color-bg-main);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.contact-form-container h3, .social-links-container h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-bg-light);
    padding-bottom: 0.5rem;
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.contact-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ced4da;
    background-color: var(--color-bg-light);
    color: var(--color-secondary);
    border-radius: 4px;
    font-family: var(--font-primary);
    transition: border-color var(--transition-speed);
    font-size: 1rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.contact-form textarea {
    height: 200px;
    resize: none;
}

.contact-form .btn-primary {
    width: 100%;
    margin-top: var(--spacing-sm);
}

.form-note {
    font-size: 0.8rem;
    color: var(--color-secondary);
    text-align: center;
    margin-top: 10px;
}

.social-links {
    list-style: none;
    padding: 0;
}

.social-links li {
    margin-bottom: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    font-size: 1.1rem;
    color: var(--color-text-dark);
    padding: 0.5rem;
    border-radius: var(--border-radius);
}

.social-links a:hover {
    background-color: var(--color-bg-light);
    color: var(--color-primary);
}

.social-icon {
    font-size: 1.5rem;
    width: 30px;
    text-align: center;
    margin-right: 1rem;
}

.footer {
    background-color: var(--color-text-dark);
    color: var(--color-bg-main);
    text-align: center;
    padding: var(--spacing-sm) 0;
    font-size: 0.9rem;
}

.footer i {
    color: #dc3545; 
    margin: 0 5px;
}

@media (min-width: 768px) {
    .navbar .container {
        padding: var(--spacing-sm) var(--spacing-lg);
    }
    .hamburger {
        display: none; 
    }
    .nav-links {
        display: flex; 
        flex-direction: row;
        width: auto;
        position: static;
        box-shadow: none;
    }
    .nav-links li a {
        padding: 0.5rem 1rem;
    }

    .hero-section {
        padding: 8rem 0;
    }
    .hero-title {
        font-size: 4rem;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr); 
    }
    .project-img {
        height: 300px; 
    }
    .project-links {
        justify-content: space-between;
    }

    .contact-grid {
        grid-template-columns: 2fr 1fr; 
    }
}

@media (min-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.fade-in-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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