/* ==============================
   Estilos base
   ============================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background-color: #f3f4f6;
    color: #111827;
    line-height: 1.6;
}

/* ==============================
   Layout general
   ============================== */
.site-header {
    position: sticky;
    top: -80px; /* El encabezado se desplaza hacia arriba y queda oculto al hacer scroll */
    z-index: 20;
    background: rgba(17, 24, 39, 0.96);
    color: #f9fafb;
    border-bottom: 1px solid rgba(55, 65, 81, 0.7);
    backdrop-filter: blur(10px);
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.site-title {
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-size: 1rem;
}

.site-subtitle {
    font-size: 0.8rem;
    color: #9ca3af;
}

.main-nav {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.main-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    color: #e5e7eb;
    border: 1px solid transparent;
    transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.main-nav a:hover {
    background-color: #111827;
    border-color: #4b5563;
}

.main-nav a.active {
    background-color: #f97316;
    color: #111827;
    border-color: #f59e0b;
}

/* Contenido principal */
.page-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 5.5rem 1.25rem 3.5rem; /* espacio para el header sticky */
}

/* Secciones */
.hero {
    margin-bottom: 2.5rem;
    padding: 1.75rem 1.5rem;
    border-radius: 1.25rem;
    background: linear-gradient(135deg, #111827, #1f2937);
    color: #f9fafb;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.4);
}

.hero h1 {
    font-size: 1.9rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 0.98rem;
    color: #e5e7eb;
}

.content-section {
    margin-bottom: 2.5rem;
    padding: 1.75rem 1.5rem;
    border-radius: 1.25rem;
    background-color: #ffffff;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.content-section h1,
.content-section h2 {
    margin-bottom: 0.9rem;
    color: #111827;
}

.content-section h1 {
    font-size: 1.7rem;
}

.content-section h2 {
    font-size: 1.3rem;
}

.content-section p + p {
    margin-top: 0.75rem;
}

/* Preguntas frecuentes */
.faq-item {
    margin-top: 1.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid #e5e7eb;
}

.faq-item h2 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
}

/* Footer */
.site-footer {
    border-top: 1px solid #d1d5db;
    background-color: #f9fafb;
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.75rem 1.25rem 2.25rem;
    font-size: 0.85rem;
    color: #4b5563;
}

/* ==============================
   Responsivo
   ============================== */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .site-subtitle {
        max-width: 18rem;
    }

    .hero {
        padding: 1.5rem 1.25rem;
    }

    .content-section {
        padding: 1.4rem 1.25rem;
    }
}

@media (max-width: 480px) {
    .main-nav {
        width: 100%;
        justify-content: flex-start;
    }

    .main-nav a {
        font-size: 0.85rem;
        padding: 0.3rem 0.6rem;
    }

    .hero h1 {
        font-size: 1.6rem;
    }
}