:root {
    --color-primary: #D97706; /* Naranja cálido para negocios */
    --color-primary-dark: #B45309;
    --color-text-main: #1F2937;
    --color-text-secondary: #4B5563;
    --color-bg-body: #F9FAFB;
    --color-bg-card: #FFFFFF;
    --color-border: #E5E7EB;
    --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-serif: "Merriweather", "Georgia", serif;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-body);
    margin: 0;
    padding: 0;
    color: var(--color-text-main);
    line-height: 1.5;
}

/* Header Sticky */
header {
    background-color: #FFFFFF;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-sitio {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 900;
    color: #111;
    text-decoration: none;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

/* Navegación */
nav.menu-principal {
    display: flex;
    gap: 20px;
}

nav.menu-principal a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

nav.menu-principal a:hover {
    color: var(--color-primary);
    background-color: #FFF7ED; /* Naranja muy claro */
}

/* Layout Principal */
.contenedor-principal {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
    min-height: calc(100vh - 200px);
}

/* Títulos de Sección */
.encabezado-seccion {
    margin-bottom: 30px;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 15px;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.encabezado-seccion h2 {
    font-size: 28px;
    color: #111;
    margin: 0;
    font-weight: 800;
    letter-spacing: -0.5px;
}

/* Grid de Noticias */
.contenedor-grid-fichas {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

/* Tarjeta de Noticia */
.ficha-noticia {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    height: 100%;
}

.ficha-noticia:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: #FED7AA;
}

.ficha-contenido {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.ficha-categoria {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.ficha-noticia h2 {
    margin: 0 0 12px 0;
    font-family: var(--font-serif);
    font-size: 20px;
    line-height: 1.4;
    font-weight: 700;
}

.ficha-noticia h2 a {
    color: #111;
    text-decoration: none;
    background-image: linear-gradient(transparent 95%, var(--color-primary) 5%);
    background-repeat: no-repeat;
    background-size: 0% 100%;
    transition: background-size .3s;
}

.ficha-noticia:hover h2 a {
    background-size: 100% 100%;
    color: var(--color-primary-dark);
}

.ficha-resumen {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
}

.ficha-footer {
    padding-top: 15px;
    border-top: 1px solid #F3F4F6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ficha-fecha {
    font-size: 13px;
    color: #9CA3AF;
}

.boton-leer-mas {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.boton-leer-mas::after {
    content: "→";
    margin-left: 4px;
    transition: transform 0.2s;
}

.boton-leer-mas:hover::after {
    transform: translateX(3px);
}

/* Página de Artículo Completo */
.articulo-contenedor {
    max-width: 950px;
    margin: 0 auto;
    background: white;
    padding: 60px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.articulo-header {
    margin-bottom: 40px;
    text-align: center;
}

.articulo-meta-top {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-primary);
}

.articulo-titulo {
    font-family: var(--font-serif);
    font-size: 42px;
    line-height: 1.2;
    color: #111;
    margin-bottom: 25px;
    font-weight: 800;
}

.articulo-bajada {
    font-size: 20px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    font-style: italic;
    margin-bottom: 30px;
}

.articulo-meta-autor {
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
    padding: 15px 0;
    color: #666;
    font-size: 14px;
    display: flex;
    justify-content: space-between;
}

.cuerpo-articulo {
    font-family: var(--font-serif);
    font-size: 19px;
    line-height: 1.8;
    color: #2D3748;
}

.cuerpo-articulo p {
    margin-bottom: 24px;
}

.cuerpo-articulo h2 {
    font-family: var(--font-sans);
    font-size: 26px;
    margin-top: 40px;
    margin-bottom: 20px;
    color: #111;
}

.cuerpo-articulo a {
    color: var(--color-primary);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;
}

.cuerpo-articulo a:hover {
    color: var(--color-primary-dark);
    background-color: #FFF7ED;
}

/* Footer */
footer {
    background-color: #111827;
    color: #9CA3AF;
    padding: 60px 0;
    margin-top: 80px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.footer-brand {
    color: white;
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
    display: block;
}

.footer-links {
    margin: 20px 0;
}

.footer-links a {
    color: #D1D5DB;
    text-decoration: none;
    margin: 0 10px;
    font-size: 14px;
}

.footer-links a:hover {
    color: white;
    text-decoration: underline;
}

/* Responsividad */
@media (max-width: 768px) {
    .header-container {
        height: auto;
        flex-direction: column;
        padding: 15px 20px;
        gap: 15px;
    }

    .contenedor-grid-fichas {
        grid-template-columns: 1fr;
    }

    .articulo-contenedor {
        padding: 30px 20px;
    }

    .articulo-titulo {
        font-size: 32px;
    }

    .menu-principal {
        flex-wrap: wrap;
        justify-content: center;
    }
}