/* ==========================================================================
   VARIABLES Y TEMA (Light / Dark)
   ========================================================================== */
:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --text-muted: #666666;
    --card-bg: #fdfdfd;
    --border-color: #eaeaea;
    --accent-cyan: #00c2cb;
    --accent-lime: #c9e265;
    --header-bg: rgba(255, 255, 255, 0.85);
    --node-color: rgba(0, 194, 203, 0.2);
    --line-color: rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body.dark-mode {
    --bg-color: #050505;
    --text-color: #f5f5f5;
    --text-muted: #999999;
    --card-bg: #0f0f0f;
    --border-color: #222222;
    --header-bg: rgba(5, 5, 5, 0.85);
    --node-color: rgba(201, 226, 101, 0.2);
    --line-color: rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   RESETEO Y TIPOGRAFÍA MINIMALISTA
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-cyan);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   ESTRUCTURA Y COMPONENTES
   ========================================================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 7rem 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 3.5rem;
    display: inline-block;
    position: relative;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 50px;
    height: 4px;
    background: var(--accent-cyan);
    transition: width 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    border-radius: 2px;
}

.section-title:hover::after {
    width: 100%;
    background: var(--accent-lime);
}

/* ==========================================================================
   HEADER Y NAVEGACIÓN
   ========================================================================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.25rem 0;
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.4s ease, border-color 0.4s ease;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    /* Ajusta según necesidad */
    width: auto;
}

.logo-dark {
    display: none;
}

body.dark-mode .logo-light {
    display: none;
}

body.dark-mode .logo-dark {
    display: block;
}

.logo span {
    color: var(--accent-cyan);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-cyan);
    transition: var(--transition);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--card-bg);
    color: var(--accent-lime);
    transform: rotate(15deg);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    height: 2px;
    width: 100%;
    background-color: var(--text-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==========================================================================
   HERO SECTION (Con Canvas de Red Neuronal)
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding-top: 140px;
    padding-bottom: 5rem;
    overflow: hidden;
}

#network-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    max-width: 1200px;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
    display: block;
    font-weight: 700;
}

.hero-col-left h1 {
    font-size: clamp(2.8rem, 5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 0;
    letter-spacing: -2px;
}

.hero-col-left h1 span {
    color: var(--accent-lime);
}

.hero-col-right p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.btn {
    display: inline-block;
    padding: 1.2rem 2.5rem;
    background: var(--text-color);
    color: var(--bg-color);
    font-weight: 600;
    font-size: 1rem;
    border-radius: 6px;
    transition: var(--transition);
    border: 2px solid var(--text-color);
}

.btn:hover {
    background: transparent;
    color: var(--text-color);
    border-color: var(--text-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

body.dark-mode .btn:hover {
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   SOBRE MÍ Y ESPECIALIDADES
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.8rem;
    color: var(--text-muted);
    font-size: 1.15rem;
    line-height: 1.8;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2.5rem;
}

.skill-tag {
    padding: 0.6rem 1.2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    transition: var(--transition);
}

.skill-tag:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 194, 203, 0.1);
}

/* ==========================================================================
   PROYECTOS Y LABS (Grid System)
   ========================================================================== */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 3rem 2.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    z-index: 1;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--text-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: 2;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--text-color);
}

body.dark-mode .card:hover {
    box-shadow: 0 20px 40px rgba(255, 255, 255, 0.03);
}

.card:hover::before {
    transform: scaleX(1);
    background: var(--accent-cyan);
}

.card-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: var(--border-color);
    color: var(--text-color);
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
}

.card h3 {
    font-size: 1.6rem;
    margin-bottom: 1.2rem;
    margin-top: 1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.card p {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    flex-grow: 1;
    font-size: 1.05rem;
    line-height: 1.7;
}

.card-link {
    display: inline-flex;
    align-items: center;
    font-weight: 700;
    font-size: 0.95rem;
    margin-top: auto;
}

.card-link svg {
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.card:hover .card-link svg {
    transform: translateX(6px);
    fill: var(--accent-lime);
}

/* ==========================================================================
   SECCIÓN BLOG (Substack Dinámico)
   ========================================================================== */
.blog-card {
    padding: 0;
}

.blog-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
    transition: transform 0.5s ease;
}

.blog-card:hover img {
    transform: scale(1.03);
}

.blog-image-wrapper {
    overflow: hidden;
    width: 100%;
    border-radius: 12px 12px 0 0;
}

.blog-content {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    background: var(--card-bg);
}

.blog-meta {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 700;
}

.blog-card h3 {
    font-size: 1.4rem;
    line-height: 1.4;
    margin-bottom: 1.2rem;
    margin-top: 0;
}

#blog-loading {
    text-align: center;
    padding: 5rem 2rem;
    color: var(--text-muted);
    grid-column: 1 / -1;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px dashed var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

#blog-error {
    text-align: center;
    padding: 4rem;
    color: var(--text-muted);
    grid-column: 1 / -1;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px dashed var(--border-color);
}

/* ==========================================================================
   SUBSTACK TAGS Y SCROLL INFINITO
   ========================================================================== */
.tags-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
    justify-content: center;
}

.tag-btn {
    padding: 0.6rem 1.2rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.tag-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.tag-btn.active {
    background: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
}

.fade-in {
    animation: fadeIn 0.5s ease-in forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
footer {
    border-top: 1px solid var(--border-color);
    padding: 3rem 0;
    background: var(--card-bg);
}

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

.footer-logo {
    display: flex;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 2rem;
    margin-bottom: 0;
}

.social-links a {
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.social-links a:hover {
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

.footer-copy {
    text-align: right;
}

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

/* ==========================================================================
   MEDIA QUERIES
   ========================================================================== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-col-left h1 {
        margin-bottom: 1rem;
        font-size: 3.5rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 5rem 0;
    }

    .hero-col-left h1 {
        font-size: 2.8rem;
    }

    .hero-content {
        padding-top: 4rem;
    }

    .header-actions {
        gap: 1rem;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 320px;
        height: 100vh;
        background: var(--header-bg);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
        z-index: 1000;
        border-left: 1px solid var(--border-color);
    }

    .nav-links.active {
        right: 0;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .grid-cards {
        grid-template-columns: 1fr;
    }

    .blog-content {
        padding: 2rem;
    }

    .footer-content {
        flex-direction: column;
        justify-content: center;
        text-align: center;
    }

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