/* ============================================
   VARIABLES CSS - Colores y configuraciones
   ============================================ */
:root {
    /* Colores principales - Tema oscuro */
    --color-bg-primary: #000000;      /* Negro puro para fondo principal */
    --color-bg-secondary: #0a0a0a;    /* Negro suave para secciones alternas */
    --color-bg-card: #111111;         /* Negro grisáceo para cards */
    --color-text-primary: #ffffff;    /* Blanco para texto principal */
    --color-text-secondary: #e0e0e0;  /* Gris claro para texto secundario */
    --color-accent: #00ff88;          /* Verde neón para acentos */
    --color-accent-dark: #00cc6a;     /* Verde oscuro para hover */
    --color-border: #333333;          /* Gris oscuro para bordes */
    
    /* Tipografía */
    --font-family: 'Inter', sans-serif;
    --font-size-base: 16px;
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transiciones */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Sombras */
    --shadow-card: 0 4px 20px rgba(0, 255, 136, 0.1);
    --shadow-card-hover: 0 8px 30px rgba(0, 255, 136, 0.2);
}

/* ============================================
   RESET Y ESTILOS BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

html {
    scroll-padding-top: 80px;
}

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

/* Scrollbar personalizado */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-accent);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-dark);
}

/* Enlaces */
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

/* Listas */
ul {
    list-style: none;
}

/* Imágenes */
img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   CLASES UTILITARIAS
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    margin: 0 auto;
}

/* ============================================
   NAVEGACIÓN
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-accent);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-text-primary);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition-normal);
}

.nav-link:hover {
    color: var(--color-accent);
}

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

/* Botón hamburguesa (móvil) */
.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.nav-toggle-bar {
    width: 25px;
    height: 3px;
    background: var(--color-text-primary);
    transition: var(--transition-normal);
}

/* ============================================
   SECCIÓN HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #000000 0%, #0a0a0a 50%, #000000 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero-greeting {
    font-size: 1.2rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 1s ease forwards;
}

.hero-name {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 1s ease 0.2s forwards;
    opacity: 0;
}

.hero-title {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease 0.4s forwards;
    opacity: 0;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1s ease 0.6s forwards;
    opacity: 0;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    animation: fadeInUp 1s ease 0.8s forwards;
    opacity: 0;
    justify-content: center;
}

/* Elemento decorativo flotante */
.hero-decoration {
    position: absolute;
    width: 300px;
    height: 300px;
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.floating-element {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--color-accent);
    opacity: 0.05;
    animation: pulse 4s ease-in-out infinite;
}

/* Indicador de scroll */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 1.5rem;
    color: var(--color-accent);
}

/* ============================================
   BOTONES
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.8rem 2rem;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg-primary);
}

.btn-primary:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 255, 136, 0.3);
}

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

.btn-secondary:hover {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
    width: 100%;
    justify-content: center;
}

.btn-outline:hover {
    background: var(--color-accent);
    color: var(--color-bg-primary);
}

/* ============================================
   SECCIÓN SOBRE MÍ
   ============================================ */
.about {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-bg-secondary);
}

.about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: center;
}

.about-icon {
    font-size: 4rem;
    color: var(--color-accent);
    animation: float 4s ease-in-out infinite;
}

.about-text {
    max-width: 800px;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

/* ============================================
   SECCIÓN ESTADÍSTICAS
   ============================================ */
.stats {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: 10px;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-card-hover);
}

.stat-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    color: var(--color-text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* ============================================
   SECCIÓN TECNOLOGÍAS
   ============================================ */
.technologies {
    padding: var(--spacing-xl) var(--spacing-md);
}

.technologies-carousel {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.technologies-grid {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: var(--spacing-sm) 0;
}

.technologies-grid::-webkit-scrollbar {
    display: none;
}

.tech-card {
    flex: 0 0 auto;
    width: 280px;
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition-normal);
    z-index: 10;
}

.carousel-arrow:hover {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    border-color: var(--color-accent);
}

.carousel-arrow-left {
    left: -25px;
}

.carousel-arrow-right {
    right: -25px;
}

.tech-card {
    background: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: 10px;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition-normal);
    opacity: 0;
    transform: translateY(30px);
}

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

.tech-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-card-hover);
}

.tech-icon {
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.tech-name {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.tech-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   SECCIÓN PORTAFOLIO
   ============================================ */
.portfolio {
    padding: var(--spacing-xl) var(--spacing-md);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.portfolio-card {
    background: var(--color-bg-card);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition-normal);
    opacity: 0;
    transform: translateY(30px);
}

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

.portfolio-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-card-hover);
}

.portfolio-image {
    height: 200px;
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.portfolio-placeholder {
    font-size: 4rem;
    color: var(--color-accent);
    opacity: 0.5;
}

.portfolio-content {
    padding: var(--spacing-md);
}

.portfolio-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.portfolio-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.portfolio-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.tag {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.portfolio-link {
    margin-top: var(--spacing-sm);
}

/* Card placeholder para futuros proyectos */
.portfolio-placeholder-card {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    border: 2px dashed var(--color-border);
    background: transparent;
}

.portfolio-placeholder-card:hover {
    border-color: var(--color-accent);
    transform: none;
    box-shadow: none;
}

.portfolio-placeholder-content {
    text-align: center;
    color: var(--color-text-secondary);
}

.portfolio-placeholder-content i {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-border);
}

/* ============================================
   SECCIÓN CONTACTO
   ============================================ */
.contact {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-bg-secondary);
}

.contact-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-lg);
}

.contact-heading {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
    font-weight: 700;
}

.contact-subheading {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
    font-weight: 600;
}

.contact-description {
    max-width: 700px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.contact-cta {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    font-weight: 500;
}

.contact-info > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 1rem 2rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text-primary);
    text-decoration: none;
    transition: var(--transition-normal);
    width: 100%;
    font-size: 1rem;
    font-weight: 500;
}

.contact-item:hover {
    border-color: var(--color-accent);
    background: rgba(0, 255, 136, 0.05);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0, 255, 136, 0.15);
}

.contact-item i {
    color: var(--color-accent);
    font-size: 1.5rem;
}

.contact-item span {
    color: var(--color-text-primary);
}

.contact-social {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-link {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    transition: var(--transition-normal);
}

.social-link:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

/* Formulario de contacto */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    color: var(--color-text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 5px;
    padding: 0.8rem;
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--spacing-md) var(--spacing-md);
    background: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    text-align: center;
    color: var(--color-text-secondary);
}

.footer-content p {
    margin-bottom: var(--spacing-xs);
}

.footer-content i {
    color: var(--color-accent);
}

/* ============================================
   BOTÓN VOLVER ARRIBA
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--color-accent);
    color: var(--color-bg-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-normal);
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.3);
}

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

.back-to-top:hover {
    background: var(--color-accent-dark);
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(0, 255, 136, 0.4);
}

/* ============================================
   LOADER INICIAL
   ============================================ */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    text-align: center;
}

.loader-text {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 20px;
    letter-spacing: 5px;
    animation: pulse 1.5s ease-in-out infinite;
}

.loader-bar {
    width: 200px;
    height: 3px;
    background: var(--color-bg-secondary);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.loader-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-accent);
    animation: loading 1.5s ease-in-out infinite;
}

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

.footer-contact {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-contact p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-secondary);
    transition: var(--transition-normal);
}

.contact-link:hover {
    color: var(--color-accent);
    transform: translateY(-2px);
}

.contact-link i {
    font-size: 1.2rem;
}

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.05;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.1;
    }
}

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .hero-name {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    /* Navegación móvil */
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--color-bg-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    /* Hero */
    .hero-name {
        font-size: 2.5rem;
    }
    
    .hero-title {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* Contacto */
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    /* Portafolio */
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 1rem;
    }
    
    .hero-greeting {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .technologies-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-icon {
        font-size: 2rem;
    }
    
    .contact-item {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
    
    .loader-text {
        font-size: 2rem;
    }
    
    .loader-bar {
        width: 150px;
    }
}