/* =========================================
   VARIABLES & DESIGN TOKENS
   ========================================= */
:root {
    /* Paleta de Colores */
    --color-bg-dark: #050505;
    --color-surface: #111111;
    --color-surface-hover: #1a1a1a;
    --color-text-main: #ffffff;
    --color-text-muted: #a1a1aa;
    --color-primary: #0070f3;
    --color-primary-hover: #0056b3;
    --color-primary-glow: rgba(0, 112, 243, 0.3);
    --color-border: #222222;

    /* Tipografía */
    --font-main: 'Space Grotesk', system-ui, -apple-system, sans-serif;

    /* Espaciados y Layout */
    --space-sm: 0.75rem;
    --space-md: 1.5rem;
    --space-lg: 3rem;
    --space-xl: 5rem;
    --container-max-width: 1200px;

    /* Estilos Visuales */
    --radius-sm: 8px;
    --radius-md: 16px;
    --transition-base: 0.3s ease;
}

/* =========================================
   RESET & BASE
   ========================================= */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg-dark);
    color: var(--color-text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.container {
    width: 90%;
    max-width: var(--container-max-width);
    margin: 0 auto;
}

.section {
    padding: var(--space-xl) 0;
}

/* =========================================
   COMPONENTES
   ========================================= */
/* Botones */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    cursor: pointer;
    border: 1px solid transparent;
}

/* Accesibilidad (a11y) */
.btn:focus-visible, a:focus-visible {
    outline: 2px dashed var(--color-text-main);
    outline-offset: 4px;
}

.btn--primary {
    background-color: var(--color-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--color-primary-glow);
}

.btn--primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--color-primary-glow);
}

.btn--outline {
    background-color: transparent;
    border-color: var(--color-border);
    color: var(--color-text-main);
}

.btn--outline:hover {
    border-color: var(--color-text-main);
    background-color: rgba(255,255,255,0.05);
}

.btn--large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* Texto Gradiente (Modern Tech Vibe) */
.text-gradient {
    background: linear-gradient(135deg, #0070f3 0%, #00c6ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* =========================================
   LAYOUT
   ========================================= */
/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
}

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

.header__logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header__logo-leads {
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    text-align: center;
    padding-top: calc(var(--space-xl) * 1.5);
    padding-bottom: var(--space-xl);
}

.hero__container {
    max-width: 800px;
}

.hero__title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -1px;
}

.hero__subtitle {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    font-weight: 300;
}

/* Services Grid */
.services__title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--space-lg);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
}

.service-card {
    background-color: var(--color-surface);
    padding: var(--space-lg) var(--space-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.service-card:hover {
    background-color: var(--color-surface-hover);
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.service-card__icon {
    font-size: 2.5rem;
}

.service-card__title {
    font-size: 1.25rem;
    font-weight: 600;
}

.service-card__desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Footer */
.footer {
    text-align: center;
    border-top: 1px solid var(--color-border);
    background: linear-gradient(to bottom, transparent, rgba(0, 112, 243, 0.03));
}

.footer__title {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.footer__email {
    display: inline-block;
    font-size: 1.75rem;
    color: var(--color-primary);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    transition: color var(--transition-base);
}

.footer__email:hover {
    color: var(--color-text-main);
}

.footer__copyright {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* =========================================
   MEDIA QUERIES
   ========================================= */
@media (max-width: 768px) {
    .section {
        padding: var(--space-lg) 0;
    }
    
    .hero__title {
        margin-bottom: 1rem;
    }

    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .header__nav .btn {
        width: auto;
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.logo .nodo { color: var(--text-main); }
.logo .leads { color: var(--accent-blue); }

/* Botones */
.btn-primary {
    background-color: var(--accent-blue);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: 0.3s ease;
}

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

.btn-primary.large {
    padding: 15px 30px;
    font-size: 1.1rem;
    display: inline-block;
    margin-top: 20px;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 100px 5% 80px;
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
}

.highlight {
    color: var(--accent-blue);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

/* Servicios */
.services {
    padding: 60px 5%;
    text-align: center;
}

.services h2 {
    font-size: 2rem;
    margin-bottom: 40px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid #222;
    text-align: left;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-blue);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--accent-blue);
}

.card p {
    color: var(--text-muted);
}

/* Footer */
footer {
    text-align: center;
    padding: 80px 5% 40px;
    border-top: 1px solid #222;
    margin-top: 40px;
}

footer h2 { margin-bottom: 20px; }
footer a { color: var(--accent-blue); text-decoration: none; font-weight: bold;}
.copyright { color: var(--text-muted); margin-top: 30px; font-size: 0.9rem; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
}