/* ========================================
   XAVIS3C - Landing Page + Blog Styles
   Tema: Negro oscuro + Rojo oscuro
   ======================================== */

/* === Reset & Base Styles === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --bg-primary: #0b0b0b;
    --bg-secondary: #151515;
    --bg-card: #1a1a1a;
    --color-primary: #8b0000;
    --color-primary-hover: #a30000;
    --color-primary-dark: #6b0000;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    --border-color: #2a2a2a;
    --shadow: rgba(139, 0, 0, 0.3);
    
    /* Typography */
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-code: 'Courier New', Courier, monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* === Header & Navigation === */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(11, 11, 11, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1.2rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    cursor: pointer;
    transition: color 0.3s ease;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

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

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    text-align: center;
    z-index: 2;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.title-line {
    display: block;
}

.highlight {
    color: var(--color-primary);
    position: relative;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Buttons === */
.btn {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    border-radius: 0;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 20px var(--shadow);
}

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

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

/* === Hero Decoration === */
.hero-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
    pointer-events: none;
}

.decoration-box {
    position: absolute;
    border: 1px solid var(--color-primary);
    background: rgba(139, 0, 0, 0.2);
    box-shadow:
        0 0 10px rgba(139, 0, 0, 0.6),
        0 0 25px rgba(139, 0, 0, 0.4),
        0 0 50px rgba(139, 0, 0, 0.2);
    opacity: 1;
}

.box-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 5%;
    animation: float 6s ease-in-out infinite;
}

.box-2 {
    width: 200px;
    height: 200px;
    bottom: 15%;
    right: 10%;
    animation: float 8s ease-in-out infinite;
}

.box-3 {
    width: 150px;
    height: 150px;
    top: 60%;
    left: 80%;
    animation: float 7s ease-in-out infinite;
}

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

/* === Sections === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-post {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
}

/* === About Section === */
.about-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

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

/* === Latest Posts Section === */
.latest-posts {
    padding: var(--spacing-xl) 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.view-all {
    color: var(--color-primary);
    font-size: 1.1rem;
    font-weight: 600;
    transition: color 0.3s ease;
}

.view-all:hover {
    color: var(--color-primary-hover);
}




/* === Posts Grid === */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.post-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2rem;
    transition: all 0.3s ease;
    cursor: pointer;
}






/* === Post Card Image === */
.post-card-image {
    width: 100%;
    height: 180px;          /* aquí controlas el tamaño */
    overflow: hidden;
    margin-bottom: 1rem;
}

.post-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;     /* evita que se deforme */
    display: block;
}




/* === Hacker style for post images === */
.post-card-image {
    position: relative;
    box-shadow:
        0 0 10px rgba(139, 0, 0, 0.4),
        0 0 25px rgba(139, 0, 0, 0.2);
}

/* zoom suave al pasar el mouse */
.post-card:hover .post-card-image img {
    transform: scale(1.1);
}

.post-card-image img {
    transition: transform 0.4s ease;
}

/* brillo rojo tipo cyber */
.post-card-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        120deg,
        transparent 30%,
        rgba(139,0,0,0.15),
        transparent 70%
    );
    pointer-events: none;
}







.post-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: 0 10px 30px var(--shadow);
}

.post-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.post-card-category {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.post-card-date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.post-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.post-card-description {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.post-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.post-card-difficulty {
    font-size: 0.9rem;
    padding: 0.3rem 0.8rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.read-more {
    color: var(--color-primary);
    font-weight: 600;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: var(--color-primary-hover);
}

/* === Blog Page Specific === */
.blog-hero {
    padding: 10rem 0 4rem;
    text-align: center;
    background-color: var(--bg-secondary);
}

.page-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* === Filter Section === */
.filter-section {
    padding: 3rem 0;
}

.filter-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.7rem 1.5rem;
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: var(--color-primary);
    color: var(--text-primary);
}

.filter-btn.active {
    background-color: var(--color-primary);
    color: var(--text-primary);
    border-color: var(--color-primary);
}

.blog-section {
    padding: 3rem 0 var(--spacing-xl);
}

.no-results {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-muted);
    font-size: 1.2rem;
}

/* === Post Article Page === */
.post-article {
    padding: 10rem 0 var(--spacing-xl);
}

.post-header {
    text-align: center;
    margin-bottom: 4rem;
}

.back-link {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 2rem;
    transition: color 0.3s ease;
}

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

.post-category {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.post-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.post-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 1rem;
}

.post-separator {
    color: var(--text-muted);
}

.post-difficulty {
    padding: 0.3rem 0.8rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.post-content {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--text-secondary);
}

.post-content h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-top: 3rem;
    margin-bottom: 1.5rem;
}

.post-content h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.post-content p {
    margin-bottom: 1.5rem;
}

.post-content ul,
.post-content ol {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content code {
    background-color: var(--bg-secondary);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-family: var(--font-code);
    color: var(--color-primary);
    font-size: 0.95rem;
}

.post-content pre {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-left: 3px solid var(--color-primary);
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.post-content pre code {
    background-color: transparent;
    padding: 0;
    color: var(--text-secondary);
}

.post-footer {
    margin-top: 4rem;
    text-align: center;
}

/* === Footer === */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* === Responsive Design === */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .post-title {
        font-size: 2rem;
    }
    
    .posts-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .section-header {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .container,
    .container-post {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 6rem 1rem 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .filter-controls {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

}