/* ============================================================
   main.css — Estilos principales del portafolio DevOps
   Autor: Cristóbal Hernández
   
   ESTRUCTURA:
   1. Variables CSS (colores, fuentes, espaciados)
   2. Reset y base
   3. Navbar
   4. Hero (página principal)
   5. Secciones genéricas (section-dark, section-alt)
   6. Componentes: Proyectos, Stack, Blog, About
   7. Footer
   8. Animaciones
   9. Responsive (mobile)
============================================================ */


/* ============================================================
   1. VARIABLES CSS — Define el sistema de diseño completo
      Cambiar estas variables actualiza todo el sitio a la vez
============================================================ */
:root {
    /* Colores principales */
    --bg-dark: #141a24;          /* Fondo principal oscuro */
    --bg-card: #1c2433;          /* Fondo de tarjetas */
    --bg-alt: #19202e;           /* Fondo de secciones alternativas */
    --border: rgba(255,255,255,0.07); /* Bordes sutiles */
    
    /* Colores de texto */
    --text-primary: #e8edf5;     /* Texto principal (casi blanco) */
    --text-secondary: #8895a7;   /* Texto secundario (gris azulado) */
    --text-muted: #5a6a7a;       /* Texto apagado */
    
    /* Colores de acento */
    --accent: #4fa3e0;           /* Azul tecnológico principal */
    --accent-glow: rgba(79, 163, 224, 0.15); /* Glow azul */
    --green: #2dd4a0;            /* Verde para "disponible" */
    
    /* Tipografía */
    --font-display: 'Syne', sans-serif;       /* Títulos y display */
    --font-body: 'DM Sans', sans-serif;       /* Cuerpo de texto */
    --font-mono: 'JetBrains Mono', monospace; /* Código y badges técnicos */
    
    /* Espaciados */
    --section-py: 80px;
    --card-radius: 12px;
    --navbar-h: 70px;
}


/* ============================================================
   2. RESET Y BASE — Estilos base del documento
============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth; /* Desplazamiento suave al navegar */
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    /* Textura sutil de ruido de fondo */
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
}

a { text-decoration: none; }

/* Colores de acento en texto inline */
.accent { color: var(--accent); }


/* ============================================================
   3. NAVBAR — Barra de navegación fija superior
============================================================ */
#mainNav {
    height: var(--navbar-h);
    background: rgba(20, 26, 36, 0.7); /* Semi-transparente por defecto */
    backdrop-filter: blur(12px);        /* Blur de vidrio */
    border-bottom: 1px solid var(--border);
    transition: background 0.3s ease;
}

/* Cuando el usuario hace scroll, la navbar se vuelve más sólida */
#mainNav.scrolled {
    background: rgba(20, 26, 36, 0.97);
}

/* Logo: "CH | Devops" */
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
}
.brand-ch {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 1px;
}
.brand-sep {
    color: var(--text-muted);
    font-weight: 300;
}
.brand-title {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Links de navegación */
.navbar-nav .nav-link {
    color: var(--text-secondary) !important;
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    position: relative;
    transition: color 0.2s;
}
.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--text-primary) !important;
}
/* Subrayado animado para el link activo */
.navbar-nav .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

/* Botón hamburguesa: para mobile */
.navbar-toggler {
    border-color: var(--border);
}
.navbar-toggler-icon {
    filter: invert(0.7);
}


/* ============================================================
   4. HERO — Primera sección de la página Home
============================================================ */
.hero-section {
    min-height: 100vh;       /* Ocupa toda la pantalla */
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--navbar-h); /* Evita que el contenido quede bajo la navbar */
    /* Degradado de fondo */
    background: linear-gradient(135deg, #0d1320 0%, var(--bg-dark) 60%, #162035 100%);
}

/* Cuadrícula de puntos decorativos (efecto tech/grid) */
.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(79,163,224,0.08) 1px, transparent 0);
    background-size: 40px 40px;
    pointer-events: none; /* No interfiere con clics */
}

/* Layout del Hero: flex en dos columnas */
.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    padding: 60px 15px;
}

/* ---- Texto del Hero ---- */
.hero-text { flex: 1; }

.hero-available {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: var(--green);
    margin-bottom: 20px;
    text-transform: uppercase;
}

/* Punto verde parpadeante */
.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 6vw, 5rem); /* Responsive automático */
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-role {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

/* Badge "Junior" que acompaña al rol */
.role-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    padding: 3px 10px;
    border: 1px solid var(--accent);
    border-radius: 20px;
    color: var(--accent);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 480px;
    margin-bottom: 36px;
    line-height: 1.8;
}

/* Botones del Hero */
.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Botón primario: fondo azul */
.btn-primary-custom {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: #fff;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 12px 24px;
    border-radius: 8px;
    transition: all 0.2s;
    border: 2px solid var(--accent);
}
.btn-primary-custom:hover {
    background: transparent;
    color: var(--accent);
}

/* Botón outline: solo borde */
.btn-outline-custom {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 12px 24px;
    border-radius: 8px;
    border: 2px solid var(--border);
    transition: all 0.2s;
}
.btn-outline-custom:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ---- Imagen del Hero (derecha) ---- */
.hero-img-wrap {
    flex: 0 0 auto;
    position: relative;
    width: 320px;
}

/* Placeholder de foto con iniciales CH */
.hero-photo-placeholder {
    width: 280px;
    height: 320px;
    border-radius: 20px;
    background: linear-gradient(135deg, #1c2a3e, #243047);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 4px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
    overflow: hidden; /* evita que la imagen se salga del contenedor */
}

/* Imagen de perfil real — recorta y encuadra correctamente */
.hero-photo-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;          /* recorta sin deformar la imagen */
    object-position: center top; /* enfoca la parte superior (cara) */
    border-radius: 20px;
}

/* Tarjetas flotantes de tecnologías sobre la foto */
.floating-badge {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(28, 36, 51, 0.95);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 16px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-primary);
    backdrop-filter: blur(8px);
    /* Animación flotante */
    animation: float 3s ease-in-out infinite;
}
.badge-k8s {
    top: 20px;
    right: -20px;
    animation-delay: 0s;
}
.badge-gcp {
    bottom: 40px;
    right: -30px;
    animation-delay: 1.5s;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}


/* ============================================================
   5. SECCIONES GENÉRICAS — Base para todas las secciones
============================================================ */
.section-dark {
    padding: var(--section-py) 0;
    background: var(--bg-dark);
}

.section-alt {
    padding: var(--section-py) 0;
    background: var(--bg-alt);
}

/* Encabezado de sección */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}
.section-subtitle {
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto;
}

/* Punto azul animado "en vivo" */
.live-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    display: inline-block;
    animation: pulse 2s infinite;
}

/* ---- Page Hero (banner interno de páginas) ---- */
.page-hero {
    padding: calc(var(--navbar-h) + 48px) 0 48px;
    background: linear-gradient(180deg, #0d1320 0%, var(--bg-dark) 100%);
    border-bottom: 1px solid var(--border);
}
.page-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: 12px;
}
.page-hero-sub {
    color: var(--text-secondary);
    max-width: 640px;
    margin-bottom: 8px;
}


/* ============================================================
   6. COMPONENTES
============================================================ */

/* ---- TARJETAS DE PROYECTO (Home preview) ---- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 28px;
    transition: border-color 0.2s, transform 0.2s;
}
.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
    gap: 12px;
}
.project-card-header h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
}
.project-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 3px 10px;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: 20px;
    white-space: nowrap;
}

.project-features {
    list-style: none;
    margin-bottom: 20px;
}
.project-features li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 4px 0;
    padding-left: 16px;
    position: relative;
}
/* Bullet decorativo con guión azul */
.project-features li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 0.7rem;
}

/* ---- PROYECTO DETALLE (página Proyectos) ---- */
.project-detail {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 40px;
    margin-bottom: 32px;
}
.project-detail-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.project-detail-desc {
    color: var(--text-secondary);
    margin-bottom: 28px;
    max-width: 700px;
}
.project-features-detail {
    list-style: none;
    margin: 24px 0;
}
.project-features-detail li {
    color: var(--text-secondary);
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
}
.project-features-detail li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* Diagrama de arquitectura */
.arch-diagram {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 28px;
    background: rgba(0,0,0,0.2);
    border-radius: 10px;
    border: 1px solid var(--border);
    margin: 24px 0;
    overflow-x: auto;
}
.arch-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    min-width: 80px;
    text-align: center;
}
.arch-node i { font-size: 1.4rem; }
.highlight-node {
    border-color: var(--accent);
    background: var(--accent-glow);
}
.arch-node .arch-label {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 2px;
}
.arch-arrow {
    color: var(--accent);
    font-size: 1.2rem;
    opacity: 0.6;
}
.user-node { border-color: var(--green); }

/* ---- TECH PILLS — Tags de tecnología ---- */
.project-tech-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}
.tech-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    padding: 5px 14px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-secondary);
}
.tech-pill i { font-size: 0.9rem; }

/* ---- PROJECT LINKS ---- */
.project-links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 20px;
}
.proj-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: all 0.2s;
}
.proj-link:hover { border-color: var(--accent); color: var(--accent); }
.accent-link { color: var(--accent); border-color: var(--accent); }


/* ---- STACK GRID (Home preview) ---- */
.stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    overflow: hidden;
}
.stack-category {
    padding: 28px;
    border-right: 1px solid var(--border);
}
.stack-category:last-child { border-right: none; }
.stack-cat-title {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}
.stack-icons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.stack-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.stack-item i { font-size: 1.3rem; }

/* ---- STACK FULL (página Stack) ---- */
.stack-full-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    overflow: hidden;
    margin-bottom: 24px;
}
.stack-full-category {
    padding: 32px;
    border-right: 1px solid var(--border);
}
.stack-full-category:last-child { border-right: none; }
.stack-item-lg {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 8px 0;
}
.stack-item-lg i { font-size: 1.6rem; }
.stack-sub-items {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 8px;
}
.stack-sub {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 2px 10px;
    background: var(--accent-glow);
    color: var(--accent);
    border-radius: 20px;
}

/* ---- LEARNING LIST (página Stack) ---- */
.learning-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 700px;
    margin: 0 auto;
}
.learning-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    transition: border-color 0.2s;
}
.learning-item:hover { border-color: var(--accent); }
.learning-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.learning-icon i { font-size: 2rem; }
.learning-name {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}


/* ---- BLOG GRID (Home preview) ---- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    overflow: hidden;
    transition: border-color 0.2s, transform 0.2s;
    color: var(--text-primary);
    display: block;
}
.blog-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}
/* Imágenes simuladas con degradados — se reemplazan cuando hay imagen real */
.blog-card-img {
    height: 140px;
    background: linear-gradient(135deg, #1a2a3f, #243050);
    background-size: cover;
    background-position: center;
}
/* Miniatura artículo 1 — guarda tu imagen como static/img/blog-img-1.jpg */
.blog-img-1 {
    background-image: url('/static/img/blog-img-1.jpg');
    background-color: #1a2a40; /* fallback si no hay imagen */
}
/* Miniatura artículo 2 — guarda tu imagen como static/img/blog-img-2.jpg */
.blog-img-2 {
    background-image: url('/static/img/blog-img-2.jpg');
    background-color: #1f2a1f;
}
.blog-img-3 {
    background-image: url('/static/img/blog-img-3.jpg');
    background-color: #1a1f2a;
}
.blog-card-body { padding: 20px; }
.blog-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 3px 10px;
    background: rgba(79,163,224,0.15);
    color: var(--accent);
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 10px;
}
.blog-tag.aws {
    background: rgba(255, 155, 50, 0.15);
    color: #ff9b32;
}
.blog-tag.cicd {
    background: rgba(255, 200, 50, 0.12);
    color: #f5c842;
}
.blog-card-body h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.blog-card-body p {
    font-size: 0.87rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}
.blog-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ---- BLOG LIST (página Blog, formato horizontal) ---- */
.blog-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 860px;
    margin: 0 auto;
}
.blog-list-item {
    display: flex;
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    overflow: hidden;
    transition: border-color 0.2s;
    align-items: stretch;
}
.blog-list-item:hover { border-color: var(--accent); }
.blog-list-img {
    width: 200px;
    flex-shrink: 0;
    min-height: 140px;
    background-size: cover;
    background-position: center;
    background-color: #1a2a40;
}
.blog-list-body {
    padding: 24px 20px;
    flex: 1;
}
.blog-list-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.blog-list-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}
.blog-list-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}
.blog-list-tag { padding: 16px; display: flex; align-items: center; }

/* Paginación del blog */
.blog-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}
.page-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.2s;
}
.page-btn:hover, .page-btn.active {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

/* ---- ABOUT (página Sobre Mí) ---- */
.about-layout {
    display: flex;
    gap: 48px;
    align-items: flex-start;
    max-width: 900px;
    margin: 0 auto;
}
.about-photo-wrap { flex-shrink: 0; }
.about-photo-placeholder {
    width: 180px;
    height: 180px;
    border-radius: 16px;
    background: linear-gradient(135deg, #1c2a3e, #243047);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    overflow: hidden; /* evita que la imagen se salga */
}
/* Imagen real dentro del placeholder */
.about-photo-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 16px;
}
.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}
.about-text strong { color: var(--text-primary); }
.inline-link { color: var(--accent); }
.about-goal { color: var(--text-primary) !important; font-size: 1rem; }
.about-connect {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--text-primary) !important;
    font-size: 1rem;
}

/* Botones de redes sociales */
.social-btns {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}
.social-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all 0.2s;
}
.social-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

/* ---- ABOUT MAIN LAYOUT: foto grande izquierda + texto derecha ---- */
.about-main-layout {
    display: flex;
    gap: 56px;
    align-items: flex-start;
    max-width: 1000px;
    margin: 0 auto;
}

/* Columna izquierda: foto grande */
.about-main-photo {
    flex: 0 0 360px; /* ancho fijo de 360px */
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Contenedor de la foto grande */
.about-big-photo {
    width: 100%;
    height: 460px;
    border-radius: 20px;
    border: 1px solid var(--border);
    overflow: hidden;
    position: relative;
    background: linear-gradient(135deg, #1c2a3e, #243047);
}

/* Imagen real */
.about-big-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;          /* recorta sin deformar */
    object-position: center top; /* enfoca cara/parte superior */
    border-radius: 20px;
    position: relative;
    z-index: 1;
}

/* Fallback "CH" visible solo cuando no hay imagen */
.about-photo-fallback {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 800;
    color: var(--accent);
    z-index: 0; /* queda detrás de la imagen */
}

/* Cuando no carga la imagen, se muestra el fallback */
.about-big-photo.no-photo img { display: none; }
.about-big-photo.no-photo .about-photo-fallback { z-index: 1; }

/* Columna derecha: texto */
.about-main-text {
    flex: 1;
    padding-top: 8px;
}

/* ---- ABOUT CARDS (Stack + Filosofía) ---- */
.about-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
}
.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 32px;
    transition: border-color 0.2s;
}
.about-card:hover { border-color: var(--accent); }
.about-card-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}
.about-card-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}
/* Lista de items dentro de cada tarjeta */
.about-card-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.about-card-list li {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.about-card-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}
/* Etiqueta en azul (ej: "Cloud & Orquestación") */
.about-card-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
}
/* Valor descriptivo debajo de la etiqueta */
.about-card-value {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}
/* Texto introductorio del about */
.about-intro {
    font-size: 1.05rem !important;
    color: var(--text-secondary);
    line-height: 1.9 !important;
    margin-bottom: 20px;
}
/* Párrafos de cuerpo del about */
.about-body {
    font-size: 0.97rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 18px;
}
.about-body strong { color: var(--text-primary); }
.about-connect {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--text-primary) !important;
    font-size: 1rem;
    margin-bottom: 0;
}

/* ---- CV WRAP — Visualizador de PDF ---- */
.cv-wrap {
    max-width: 900px;
    margin: 0 auto;
}
.cv-wrap iframe {
    display: block;
    width: 100%;
}

/* ---- CERTIFICACIONES ---- */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}
.cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 28px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    transition: border-color 0.2s, transform 0.2s;
}
.cert-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}
.cert-icon { font-size: 2.5rem; }
.cert-body { flex: 1; }
.cert-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}
.cert-issuer {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--accent);
}
.cert-btn {
    padding: 8px 18px;
    font-size: 0.82rem;
    align-self: flex-start;
}


/* ============================================================
   7. FOOTER
============================================================ */
.site-footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
    background: var(--bg-dark);
}
.site-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
}
.footer-name {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--text-primary);
}
.footer-sep { color: var(--text-muted); }
.footer-role { color: var(--text-muted); font-size: 0.82rem; }
.footer-links {
    display: flex;
    gap: 16px;
}
.footer-links a {
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }


/* ============================================================
   8. ANIMACIONES DE SCROLL
   Los elementos con clase "fade-in" aparecen al entrar en pantalla
============================================================ */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}


/* ============================================================
   9. RESPONSIVE — Ajustes para pantallas pequeñas (mobile)
============================================================ */
/* Imagen principal del artículo de blog */
.blog-article-img {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 32px;
    border: 1px solid var(--border);
}
@media (max-width: 768px) {
    /* Hero se apila en columna en móvil */
    .hero-container {
        flex-direction: column;
        text-align: center;
        padding: 40px 15px;
    }
    .hero-img-wrap { width: 100%; display: flex; justify-content: center; }
    .hero-photo-placeholder { width: 220px; height: 240px; }
    .hero-btns { justify-content: center; }
    .hero-desc { margin: 0 auto 32px; }
    .hero-available { justify-content: center; }
    .hero-role { justify-content: center; }

    /* Stack grid en 2 columnas */
    .stack-grid,
    .stack-full-grid {
        grid-template-columns: 1fr 1fr;
    }
    .stack-category,
    .stack-full-category {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    /* Blog list en columna */
    .blog-list-item {
        flex-direction: column;
    }
    .blog-list-img { width: 100%; height: 160px; }
    .blog-list-tag { display: none; }

    /* About apilado */
    .about-main-layout {
        flex-direction: column;
        align-items: center;
    }
    .about-main-photo {
        flex: 0 0 auto;
        width: 100%;
        max-width: 360px;
    }
    .about-layout {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .social-btns { justify-content: center; }

    /* Diagrama con scroll horizontal */
    .arch-diagram { overflow-x: auto; flex-wrap: nowrap; }
}

@media (max-width: 480px) {
    .stack-grid, .stack-full-grid { grid-template-columns: 1fr; }
    .project-card-header { flex-direction: column; }
    .hero-name { font-size: 2.4rem; }
}