:root {
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --accent: #06b6d4;
    --accent-hover: #22d3ee;
    --font-mono: 'Courier New', Courier, monospace;
    --font-sans: system-ui, -apple-system, sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    /* Evita scroll horizontal no deseado */
}

h1,
h2,
h3,
.mono {
    font-family: var(--font-mono);
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* --- NAV --- */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 60px;
}

.logo {
    font-weight: bold;
    font-size: 1.2rem;
    color: var(--accent);
}

.nav-links a {
    margin-left: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.nav-links a:hover {
    color: var(--accent);
}

/* --- HERO --- */
.hero {
    padding: 60px 0;
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.1;
}

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

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-buttons {
    margin-top: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

/* --- BOTONES --- */
.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
}

.btn:hover {
    background-color: rgba(6, 182, 212, 0.1);
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    color: var(--bg-dark);
}

/* --- SECCIONES GENERALES --- */
section {
    padding: 60px 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
}

.section-title::after {
    content: "";
    display: block;
    height: 1px;
    background: var(--text-muted);
    flex-grow: 1;
    margin-left: 20px;
    opacity: 0.3;
}

/* --- GRID ESTÁTICO (Para logros) --- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

/* Estilos base de tarjetas */
.card,
.carousel-card {
    background-color: var(--bg-card);
    padding: 30px;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--accent);
}

.card h3,
.carousel-card h3 {
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.card p,
.carousel-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

/* --- CARRUSEL RESPONSIVE --- */
.carousel-container {
    position: relative;
    overflow: hidden;
    /* Padding lateral grande por defecto para escritorio */
    padding: 20px 60px;
}

.carousel-track {
    display: flex;
    gap: 30px;
    transition: transform 0.5s ease-in-out;
    width: 100%;
}

.carousel-card {
    /* Desktop: 3 tarjetas */
    flex: 0 0 calc(33.333% - 20px);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 320px;
}

/* Botones de navegación */
.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(15, 23, 42, 0.9);
    border: 1px solid var(--accent);
    color: var(--accent);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.3s;
}

.nav-btn:hover {
    background-color: var(--accent);
    color: var(--bg-dark);
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.5);
}

.prev-btn {
    left: 10px;
}

.next-btn {
    right: 10px;
}

/* --- TECH STACK --- */
.tech-stack {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.tech-tag {
    color: var(--accent);
}

/* --- ABOUT SECTION --- */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
}

.skills-list li {
    list-style: none;
    margin-bottom: 10px;
    color: var(--text-muted);
}

.skills-list li::before {
    content: "▹";
    color: var(--accent);
    margin-right: 10px;
}

/* --- STATS BOXES --- */
.stat-box {
    border: 1px solid var(--text-muted);
    padding: 20px;
    text-align: center;
    border-radius: 4px;
    margin-top: 20px;
}

.stat-number {
    display: block;
    font-size: 2rem;
    color: var(--accent);
    font-weight: bold;
}

.stat-label {
    font-size: 0.8rem;
    font-family: var(--font-mono);
}

/* --- FOOTER --- */
footer {
    text-align: center;
    padding: 50px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links {
    margin-bottom: 20px;
}

.social-links a {
    margin: 0 10px;
    font-size: 1.2rem;
}

/* --- ANIMACIONES --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================
   MEDIA QUERIES (RESPONSIVE)
   ========================================= */

/* Tablets y Pantallas medianas (menos de 900px) */
@media (max-width: 900px) {
    .carousel-card {
        flex: 0 0 100%;
        /* Una sola tarjeta */
    }
}

/* Móviles grandes y Tablets verticales (menos de 768px) */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.8rem;
        /* Reducir tamaño título */
    }

    .about-grid {
        grid-template-columns: 1fr;
        /* Columna única en About */
    }

    .about-grid .card {
        order: -1;
        /* Poner la foto primero en móvil */
        margin-bottom: 20px;
    }

    nav {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .nav-links a {
        margin-left: 0;
        /* Quitar margen izquierdo y usar gap */
    }
}

/* Móviles pequeños (menos de 480px) */
@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    /* Ajuste crítico para el carrusel en móvil */
    .carousel-container {
        padding: 20px 30px;
        /* Reducir padding lateral para dar espacio al contenido */
    }

    .nav-btn {
        width: 30px;
        height: 30px;
        font-size: 1rem;
    }

    .prev-btn {
        left: 0;
    }

    .next-btn {
        right: 0;
    }

    /* Botones del Hero uno debajo del otro */
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        margin-left: 0 !important;
        /* Forzar reset del margen inline */
        margin-bottom: 10px;
    }

    .skills-list {
        grid-template-columns: 1fr !important;
        /* Lista de skills en una columna */
    }
}