/* ===================================================
   VARIABLES
   =================================================== */
:root {
    --primary: #0a3997;
    --secondary: #0574f3;
    --accent: #b02222;
    --text: #2c2b2b;
    --bg: #f8faff;
    --white: #ffffff;
    --shadow: 0 10px 25px rgba(0,0,0,.12);
    --radius: 18px;
    --transition: all .3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* ===================================================
   HEADER
   =================================================== */
.top-header {
    background: var(--white);
    border-bottom: 3px solid var(--accent);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    color: var(--primary);
    gap: 10px;
}

.logo span {
    font-size: .85rem;
    color: var(--accent);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 10px;
}

nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    padding: 10px 16px;
    border-radius: 10px;
    transition: var(--transition);
}

nav a:hover {
    background: var(--primary);
    color: white;
}

/* ===================================================
   HERO
   =================================================== */
.hero {
    background: linear-gradient(135deg, var(--primary), #4a6fa5);
    color: white;
    text-align: center;
    padding: 80px 20px;
    border-radius: 0 0 30px 30px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 15px;
}

.hero p {
    max-width: 700px;
    margin: auto;
    opacity: .9;
}

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

.btn {
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

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

.btn-secondary {
    background: var(--accent);
    color: white;
}

.btn:hover {
    transform: translateY(-3px);
}

/* ===================================================
   SECTION TITLE
   =================================================== */
.section-title {
    text-align: center;
    margin: 60px 0 40px;
}

.section-title h2 {
    font-size: 2.4rem;
    color: var(--primary);
}

/* ===================================================
   ARTÍCULOS
   =================================================== */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.featured-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.featured-card:hover {
    transform: translateY(-8px);
}

.card-img img {
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: 25px;
}

.category {
    background: var(--accent);
    color: white;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: .8rem;
}

.card-content h3 {
    margin: 15px 0 10px;
    font-size: 1.4rem;
}

.author {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
}

.author-img {
    width: 40px;
    height: 40px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: bold;
}

/* ===================================================
   CATEGORÍAS
   =================================================== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
}

.category-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.category-card:hover {
    background: var(--primary);
    color: white;
}

.category-card i {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 15px;
}

.category-card:hover i {
    color: white;
}

/* ===================================================
   FOOTER
   =================================================== */
footer {
    background: var(--white);
    margin-top: 80px;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 40px;
}

.footer-col h3 {
    color: var(--primary);
    margin-bottom: 20px;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
    align-items: flex-start;
}

.footer-col i {
    color: var(--accent);
    margin-top: 4px;
}

.footer-col a {
    color: var(--text);
    text-decoration: none;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 15px;
}

.social-links a {
    width: 38px;
    height: 38px;
    background: var(--primary);
    color: white;
    display: grid;
    place-items: center;
    border-radius: 50%;
}

.copyright {
    text-align: center;
    margin-top: 30px;
    font-size: .9rem;
    opacity: .7;
}

/* ===================================================
   RESPONSIVE
   =================================================== */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }
}