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

:root {
    /* Fuentes */
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;
    
    /* Tamaños de fuente base */
    --fs-xs: 0.75rem;    /* 12px */
    --fs-sm: 0.875rem;   /* 14px */
    --fs-base: 1rem;     /* 16px */
    --fs-lg: 1.125rem;   /* 18px */
    --fs-xl: 1.25rem;    /* 20px */
    --fs-2xl: 1.5rem;    /* 24px */
    --fs-3xl: 1.875rem;  /* 30px */
    --fs-4xl: 2.25rem;   /* 36px */
    
    /* Espaciado */
    --spacing-xs: 0.25rem;  /* 4px */
    --spacing-sm: 0.5rem;   /* 8px */
    --spacing-md: 1rem;     /* 16px */
    --spacing-lg: 1.5rem;   /* 24px */
    --spacing-xl: 2rem;     /* 32px */
    --spacing-2xl: 3rem;    /* 48px */
    
    /* Bordes */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-full: 9999px;
    
}

/* Estilos base del body */
body {
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* Contenedor principal */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== HEADER Y NAVEGACIÓN ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(var(--bg-color-rgb), 0.9);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo {
    display: flex;
    align-items: baseline;
    text-decoration: none;
    font-weight: 700;
    font-size: var(--fs-xl);
    gap: var(--spacing-xs);
}

.logo-text {
    color: var(--primary-color);
}

.logo-subtext {
    color: var(--text-color);
    font-weight: 500;
    font-size: var(--fs-lg);
}

/* Controles del navbar */
.navbar-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Selector de idioma */
.language-selector {
    display: flex;
    gap: var(--spacing-xs);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-full);
    padding: var(--spacing-xs);
}

.lang-btn {
    background: none;
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-full);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    color: var(--text-color);
}

.lang-btn.active {
    background-color: var(--primary-color);
    color: white;
}

/* Toggle de tema */
.theme-toggle {
    background: none;
    border: none;
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--hover-bg);
}

.theme-toggle i:last-child {
    display: none;
}

/* Botón descargar PDF */
.btn-download {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Menú hamburguesa (mobile) */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--fs-xl);
    color: var(--text-color);
    cursor: pointer;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
}

/* ===== SECCIÓN HERO ===== */
.hero-section {
    padding-top: 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

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

.hero-title {
    font-size: var(--fs-4xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-title .greeting {
    display: block;
    font-size: var(--fs-xl);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.hero-title .name {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: var(--fs-xl);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    font-size: var(--fs-lg);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    color: var(--text-color);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Botones */
.btn-primary, .btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 140px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* Avatar */
.hero-image {
    display: flex;
    justify-content: center;
}

.avatar-container {
    position: relative;
    width: 300px;
    height: 300px;
}

.avatar {
    width: 100%;
    height: 100%;
    border-radius: var(--border-radius-xl);
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

.avatar-status {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-color);
    padding: var(--spacing-xs) var(--spacing-lg);
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-md);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #10b981;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ===== SECCIONES COMUNES ===== */
section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    font-size: var(--fs-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.section-title i {
    color: var(--primary-color);
}

/* ===== SECCIÓN SOBRE MÍ ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.about-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.about-card-title {
    font-size: var(--fs-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.about-card-title i {
    color: var(--primary-color);
}

.info-list {
    list-style: none;
}

.info-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.info-list li:last-child {
    border-bottom: none;
}

.info-list i {
    width: 20px;
    color: var(--primary-color);
}

.info-list strong {
    margin-left: auto;
    color: var(--text-color);
    font-weight: 500;
}

.profile-content p {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.profile-content p:last-child {
    margin-bottom: 0;
}

/* ===== SECCIÓN EDUCACIÓN ===== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--primary-color);
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    padding-left: 50px;
    margin-bottom: var(--spacing-2xl);
}

.timeline-date {
    position: absolute;
    left: 0;
    top: 0;
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-full);
    font-size: var(--fs-sm);
    font-weight: 500;
}

.timeline-content {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.timeline-title {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.timeline-subtitle {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.timeline-list {
    list-style: none;
}

.timeline-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-color);
    position: relative;
    padding-left: var(--spacing-md);
}

.timeline-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* ===== SECCIÓN HABILIDADES ===== */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.skill-category {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.category-title {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skill-name {
    display: flex;
    justify-content: space-between;
    font-weight: 500;
    color: var(--text-color);
}

.skill-bar {
    height: 8px;
    background-color: var(--border-light);
    border-radius: var(--border-radius-full);
    overflow: hidden;
}

.skill-level {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius-full);
    transition: width 1s ease-in-out;
}

/* ===== SECCIÓN PROYECTOS ===== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.project-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.project-title {
    font-size: var(--fs-lg);
    font-weight: 600;
    color: var(--text-color);
    flex: 1;
}

.project-badge {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-full);
    font-size: var(--fs-xs);
    font-weight: 500;
    margin-left: var(--spacing-sm);
}

.project-description {
    color: var(--text-color);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.tech-tag {
    background-color: var(--bg-color);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-full);
    font-size: var(--fs-sm);
    font-weight: 500;
    border: 1px solid var(--primary-color);
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.project-link:hover {
    color: var(--secondary-color);
}

.project-link i {
    font-size: var(--fs-lg);
}

/* Proyecto destacado / en desarrollo */
.project-card--featured {
    border: 2px solid var(--primary-color);
    position: relative;
}

.project-card--featured::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.badge--wip {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ===== SECCIÓN CONTACTO ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.contact-subtitle {
    font-size: var(--fs-xl);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.contact-description {
    color: var(--text-color);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.2s ease;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-md);
}

.contact-item:hover {
    color: var(--primary-color);
    background-color: var(--hover-bg);
}

.contact-item i {
    width: 24px;
    color: var(--primary-color);
}

/* Formulario de contacto */
.contact-form {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.form-group {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-color);
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    transition: all 0.2s ease;
}

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

.form-group label {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    transition: all 0.2s ease;
    pointer-events: none;
    background-color: var(--card-bg);
    padding: 0 var(--spacing-xs);
}

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

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: 0;
    transform: translateY(-50%) scale(0.9);
    color: var(--primary-color);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

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

.footer-tagline {
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
    max-width: 300px;
    margin-left: auto;
    margin-right: auto;
}

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

.footer-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background-color: var(--bg-color);
    color: var(--text-color);
    border-radius: var(--border-radius-full);
    text-decoration: none;
    transition: all 0.2s ease;
}

.footer-social a:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
}

.copyright {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.footer-note {
    color: var(--text-secondary);
    font-size: var(--fs-sm);
}

/* ===== BOTÓN VOLVER ARRIBA ===== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== ESTADOS ACTIVOS Y HOVER ===== */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Transiciones suaves para cambios de tema */
* {
    transition: background-color 0.3s ease, 
                border-color 0.3s ease, 
                color 0.3s ease;
}

/* Mejoras de accesibilidad */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}