@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    background: #f8fafc;
    color: #0f172a;
    line-height: 1.6;
}

/* HEADER */
header {
    text-align: center;
    padding: 90px 20px;
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
}

header h1 {
    margin: 0;
    font-size: 2.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

header p {
    margin-top: 10px;
    color: #475569;
    font-size: 1.1rem;
}

/* SECTIONS */
section {
    max-width: 800px;
    margin: auto;
    padding: 50px 20px;
}

h1, h2 {
    color: #111827; /* casi negro elegante */
}

/* CARDS */
.card {
    background: #ffffff;
    padding: 20px;
    margin: 14px 0;
    border-radius: 14px;
    border: 1px solid #e2e8f0;
    transition: all 0.2s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

/* LINKS / BOTONES (gris elegante, no azul) */
a {
    display: inline-block;
    margin-top: 12px;
    padding: 10px 14px;
    background: #111827;
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    transition: all 0.2s ease;
}

a:hover {
    background: #374151;
    transform: scale(1.05);
}

/* FOOTER */
footer {
    text-align: center;
    padding: 30px;
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
    margin-top: 50px;
    color: #64748b;
}