* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background-color: #f5f0ff;
    color: #2d1b4e;
    font-family: "Segoe UI", Arial, sans-serif;
    line-height: 1.6;
}

/* ---------- Encabezado ---------- */

header {
    background: linear-gradient(135deg, #5b2a9e, #8e44d9);
    color: white;
    text-align: center;
    padding: 40px 20px 30px;
}

header h1 {
    margin: 0;
    font-size: 36px;
}

header p {
    margin: 8px 0 0;
    font-size: 17px;
    opacity: 0.9;
}

/* ---------- Menú ---------- */

nav {
    position: sticky;
    top: 0;
    z-index: 10;
    background-color: #3d1a6e;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    padding: 10px;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 15px;
}

nav a:hover {
    background-color: #8e44d9;
}

nav a.activo {
    background-color: #b57bff;
    color: #2d1b4e;
    font-weight: bold;
}

/* ---------- Contenido ---------- */

main {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

section {
    background-color: white;
    border-radius: 16px;
    padding: 25px 30px;
    margin: 25px 0;
    box-shadow: 0 4px 14px rgba(91, 42, 158, 0.12);
    scroll-margin-top: 70px;
}

section > h2 {
    margin-top: 0;
    color: #5b2a9e;
    font-size: 28px;
    border-bottom: 3px solid #d9c2ff;
    padding-bottom: 8px;
}

h3 {
    color: #7b3fc4;
    margin-bottom: 6px;
}

a {
    color: #8e44d9;
}

a:hover {
    color: #5b2a9e;
}

ul, ol {
    padding-left: 22px;
}

li::marker {
    color: #8e44d9;
}

img, video {
    max-width: 100%;
    border-radius: 12px;
}

/* ---------- Tabla ---------- */

table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 10px;
}

th {
    background-color: #8e44d9;
    color: white;
    padding: 10px;
    text-align: left;
}

td {
    padding: 10px;
    border-bottom: 1px solid #e6d9ff;
}

tr:nth-child(even) td {
    background-color: #faf6ff;
}

/* ---------- Formulario ---------- */

form {
    background-color: #f5f0ff;
    padding: 20px;
    max-width: 420px;
    border-radius: 12px;
}

label {
    font-weight: bold;
    display: block;
    margin-top: 12px;
}

input, select, textarea {
    width: 100%;
    padding: 9px;
    margin-top: 5px;
    border-radius: 8px;
    border: 1px solid #c9a8ff;
    font-family: inherit;
    font-size: 15px;
}

.botones {
    display: flex;
    gap: 10px;
    margin-top: 18px;
}

input[type="submit"],
input[type="reset"] {
    width: auto;
    padding: 10px 22px;
    border: none;
    color: white;
    cursor: pointer;
    font-weight: bold;
}

input[type="submit"] {
    background-color: #7b3fc4;
}

input[type="reset"] {
    background-color: #b57bff;
}

/* ---------- Prácticas ---------- */

.practica {
    border: 2px solid #d9c2ff;
    border-left: 6px solid #8e44d9;
    border-radius: 12px;
    padding: 18px 22px;
    margin-top: 20px;
    background-color: #fcfaff;
}

.etiqueta {
    display: inline-block;
    background-color: #8e44d9;
    color: white;
    font-size: 13px;
    font-weight: bold;
    padding: 3px 12px;
    border-radius: 12px;
}

.practica h3 {
    margin-top: 10px;
}

.practica h4 {
    color: #5b2a9e;
    margin-bottom: 4px;
}

/* ---------- Pie de página ---------- */

footer {
    text-align: center;
    background-color: #3d1a6e;
    color: #e6d9ff;
    padding: 18px;
    font-size: 14px;
}

/* ---------- Celular ---------- */

@media (max-width: 600px) {
    header h1 {
        font-size: 28px;
    }

    section {
        padding: 20px 18px;
    }

    nav a {
        padding: 6px 12px;
        font-size: 14px;
    }
}


/* ---------- Tarjetas de prácticas ---------- */

.tarjetas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    margin-top: 20px;
}

.tarjeta {
    display: block;
    text-decoration: none;
    color: #2d1b4e;
    background-color: #fcfaff;
    border: 2px solid #d9c2ff;
    border-left: 6px solid #8e44d9;
    border-radius: 12px;
    padding: 18px 22px;
    transition: transform 0.15s, box-shadow 0.15s;
}

.tarjeta:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(91, 42, 158, 0.2);
    color: #2d1b4e;
}

.tarjeta h3 {
    margin: 10px 0 4px;
}

.tarjeta p {
    margin: 0;
    font-size: 15px;
}

.ver {
    display: inline-block;
    margin-top: 10px;
    color: #8e44d9;
    font-weight: bold;
}

.regresar {
    display: inline-block;
    margin-top: 10px;
    font-weight: bold;
}