/* ============================================================
   VARIABLES & RESET
   ============================================================ */

:root {
    /* Colores principales - EDITAR AQUÍ para cambiar toda la paleta */
    --primary: #2563eb;      /* Azul principal - botones primarios */
    --primary-dark: #1e40af; /* Azul oscuro - hover estados */
    --secondary: #f3f4f6;    /* Gris claro - botones secundarios */
    --accent: #10b981;       /* Verde - acentos y tags */
    
    /* Colores de texto */
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    
    /* Colores de fondo */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-dark: #1f2937;
    
    /* Bordes y sombras */
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    /* Espaciado */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Tipografía */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Courier New', monospace;
    
    /* Transiciones */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-top: 70px; /* Espacio para navbar fijo */
}

/* ============================================================
   NAVBAR
   ============================================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    border-bottom-color: var(--border-color);
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    position: relative;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: transform var(--transition-base);
}

.nav-logo:hover {
    transform: translateY(-2px);
}

.logo-text {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.02em;
}

.logo-name {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    margin: 0;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width var(--transition-base);
}

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

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

.nav-link-cta {
    background-color: var(--primary);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 0.5rem;
    transition: all var(--transition-base);
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background-color: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    position: relative;
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-base);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    bottom: -7px;
}

.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle.active .hamburger::after {
    transform: rotate(-45deg);
    bottom: 0;
}

/* Mobile Menu */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--bg-primary);
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: var(--shadow-lg);
        transform: translateX(100%);
        transition: transform var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-link {
        font-size: 1.125rem;
        width: 100%;
        text-align: center;
        padding: 0.5rem;
    }
    
    .nav-link-cta {
        width: 100%;
        text-align: center;
    }
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 1.0625rem;
}

strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================================
   LAYOUT
   ============================================================ */

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

section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

/* ============================================================
   HERO SECTION
   ============================================================ */

#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    padding: var(--spacing-xl) 0;
    margin-top: -70px;
    padding-top: calc(70px + var(--spacing-xl));
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background-color: #e5e7eb;
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-light);
    font-size: 0.875rem;
    animation: bounce 2s infinite;
}

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

/* ============================================================
   SOBRE MÍ SECTION
   ============================================================ */

#sobre {
    background-color: var(--bg-primary);
}

.sobre-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.sobre-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.sobre-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    aspect-ratio: 1 / 1;
    border-radius: 1rem;
    object-fit: cover;
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-base);
}

.profile-image:hover {
    transform: scale(1.02);
}

/* ============================================================
   SERVICIOS SECTION
   ============================================================ */

#servicios {
    background-color: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
}

.service-card > p {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
}

.service-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.service-features li {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================================
   PORTFOLIO SECTION
   ============================================================ */

#portfolio {
    background-color: var(--bg-primary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-xl);
}

.portfolio-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 650px;
}

.portfolio-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.portfolio-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.portfolio-header h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.375rem;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    position: relative;
    max-height: 2rem; /* Altura de una fila de tags */
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.portfolio-tags.expanded {
    max-height: none;
}

.tag {
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-secondary);
    color: var(--primary);
    font-size: 0.8125rem;
    font-weight: 600;
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
}

.tag-more {
    padding: 0.25rem 0.75rem;
    background-color: var(--primary);
    color: white;
    font-size: 0.8125rem;
    font-weight: 600;
    border-radius: 0.375rem;
    border: 1px solid var(--primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.tag-more:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

.tag-more.hidden {
    display: none;
}

.portfolio-body {
    padding: var(--spacing-lg);
    flex-grow: 1;
    max-height: 550px;
    overflow-y: auto;
}

.portfolio-item {
    margin-bottom: var(--spacing-md);
    position: relative;
}

.portfolio-item:last-child {
    margin-bottom: 0;
}

.portfolio-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.portfolio-item p {
    margin-bottom: 0;
    font-size: 0.9375rem;
    line-height: 1.8;
}

/* Contenedor de contenido expandible */
.portfolio-item-content {
    position: relative;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-item-content.collapsed {
    max-height: 4.5em; /* Aproximadamente 2-3 líneas */
}

.portfolio-item-content.collapsed::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2.5em;
    background: linear-gradient(to bottom, transparent, var(--bg-primary));
    pointer-events: none;
}

.portfolio-item-content.expanded::after {
    display: none;
}

/* Botón Ver más/Ver menos */
.portfolio-item-toggle {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.375rem 0;
    margin-top: 0.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    transition: all var(--transition-fast);
}

.portfolio-item-toggle:hover {
    color: var(--primary-dark);
    transform: translateX(2px);
}

.portfolio-item-toggle svg {
    width: 12px;
    height: 12px;
    transition: transform var(--transition-fast);
}

.portfolio-item-toggle.expanded svg {
    transform: rotate(180deg);
}

.resultado-item {
    font-size: 0.9375rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 0.4rem 0;
}

.resultado-item strong {
    display: inline;
    margin-bottom: 0;
}

.portfolio-links {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: var(--spacing-md);
}

.btn-link {
    flex: 1;
    text-align: center;
    padding: 0.625rem 1rem;
    background-color: var(--bg-secondary);
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: 0.5rem;
    transition: all var(--transition-base);
    border: 1px solid var(--border-color);
}

.btn-link:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-1px);
}

/* ============================================================
   CONTACTO SECTION
   ============================================================ */

#contacto {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

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

.contacto-intro {
    font-size: 1.125rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.contacto-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    text-decoration: none;
    transition: all var(--transition-base);
}

.contact-method:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon.whatsapp {
    background-color: #25D366;
    color: white;
}

.contact-icon.email {
    background-color: var(--primary);
    color: white;
}

.contact-icon.linkedin {
    background-color: #0077B5;
    color: white;
}

.contact-icon.github {
    background-color: #181717;
    color: white;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.contact-details strong {
    font-size: 1rem;
    color: var(--text-primary);
}

.contact-details span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Formulario */
.contacto-form-wrapper {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

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

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

.form-group label {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all var(--transition-base);
    background-color: var(--bg-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ============================================================
   FOOTER
   ============================================================ */

footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: var(--spacing-lg) 0;
}

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

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

.footer-location {
    font-size: 1.125rem;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

.fade-in {
    animation: fadeIn var(--transition-slow) ease-in;
}

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

/* Intersection Observer animations (aplicadas por JS) */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

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

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (min-width: 768px) {
    .sobre-content {
        grid-template-columns: 1.5fr 1fr;
        gap: var(--spacing-2xl);
    }
    
    .contacto-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 767px) {
    section {
        padding: var(--spacing-xl) 0;
    }
    
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .sobre-content {
        grid-template-columns: 1fr;
    }
    
    .sobre-image {
        order: -1;
        margin-bottom: var(--spacing-md);
    }
    
    .profile-image {
        max-width: 280px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-card {
        min-height: auto;
    }
    
    .portfolio-body {
        max-height: none;
    }
    
    .contacto-methods {
        grid-template-columns: 1fr;
    }
    
    .portfolio-links {
        flex-direction: column;
    }
    
    .hero-scroll {
        display: none;
    }
}

/* ============================================================
   ACCESSIBILITY
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible para navegación por teclado */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Skip to main content link (para screen readers) */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    z-index: 100;
}

.skip-to-main:focus {
    top: 0;
}