body {
    font-family: 'Segoe UI', sans-serif;
    background: #0f172a;
    color: #e2e8f0;
    margin: 0;
}

/* HEADER */
header {
    background: linear-gradient(90deg, #0ea5e9, #22c55e);
    text-align: center;
    padding: 20px;
    color: white;
    text-shadow: 0 0 10px rgba(0,0,0,0.5);
}

/* NAVBAR */
nav {
    background: #020617;
    padding: 10px;
    border-bottom: 2px solid #0ea5e9;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
    gap: 20px;
}

nav a {
    color: #38bdf8;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

nav a:hover {
    color: #22c55e;
    text-shadow: 0 0 5px #22c55e;
}

/* LAYOUT */
section {
    padding: 20px;
}

main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

/* CARDS */
article {
    background: #020617;
    border: 1px solid #0ea5e9;
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 0 10px rgba(14,165,233,0.3);
    transition: 0.3s;
}

article:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px #22c55e;
}

/* BOTONES */
button {
    background: #0ea5e9;
    border: none;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 10px;
    transition: 0.3s;
}

button:hover {
    background: #22c55e;
    box-shadow: 0 0 10px #22c55e;
}

/* INPUT */
input {
    width: 100%;
    padding: 8px;
    border-radius: 5px;
    border: none;
    margin-bottom: 10px;
    outline: none;
}

/* ASIDE */
aside {
    background: #020617;
    border-top: 2px solid #0ea5e9;
    padding: 15px;
    text-align: center;
    margin-top: 20px;
}

/* FOOTER */
footer {
    background: #020617;
    text-align: center;
    padding: 15px;
    border-top: 2px solid #22c55e;
    margin-top: 20px;
}

/* CLASES JS */
.rojo {
    color: #ef4444;
    font-weight: bold;
}

.fondo {
    background: #facc15;
    color: black;
    padding: 5px;
    border-radius: 5px;
}