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

body {
    font-family: Arial, sans-serif;
    background: #f3f4f6;
    color: #1f2937;
    min-height: 100vh;
}

/* NAVBAR */

.navbar {
    background: #2563eb;
    color: white;

    padding: 18px 40px;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 22px;
    font-weight: bold;
}

.navbar nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.navbar a {
    color: white;
    text-decoration: none;
}

.navbar a:hover {
    text-decoration: underline;
}

/* CONTENEDOR */

.contenedor {
    width: 90%;
    max-width: 1100px;

    margin: 40px auto;

    min-height: 70vh;
}

/* INICIO */

.hero {
    background: white;

    padding: 60px 40px;

    border-radius: 18px;

    text-align: center;

    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.hero .icono {
    font-size: 70px;
}

.hero h1 {
    font-size: 42px;
    margin: 15px 0;
}

.hero p {
    color: #6b7280;
    font-size: 18px;

    margin-bottom: 30px;
}

/* BOTONES */

.boton {
    display: inline-block;

    padding: 13px 25px;

    background: #2563eb;

    color: white;

    text-decoration: none;

    border-radius: 8px;

    border: none;

    cursor: pointer;

    font-size: 16px;
}

.boton:hover {
    background: #1d4ed8;
}

/* LOGIN */

.login {
    max-width: 420px;

    margin: 60px auto;

    background: white;

    padding: 40px;

    border-radius: 15px;

    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.login h1 {
    text-align: center;

    margin-bottom: 10px;
}

.login .descripcion {
    text-align: center;

    color: #6b7280;

    margin-bottom: 30px;
}

.form-grupo {
    margin-bottom: 20px;
}

.form-grupo label {
    display: block;

    margin-bottom: 7px;

    font-weight: bold;
}

.form-grupo input {
    width: 100%;

    padding: 12px;

    border: 1px solid #d1d5db;

    border-radius: 8px;

    font-size: 15px;
}

.login button {
    width: 100%;
}

.error {
    background: #fee2e2;

    color: #b91c1c;

    padding: 12px;

    border-radius: 8px;

    margin-bottom: 20px;

    text-align: center;
}

/* TARJETAS */

.tarjetas {
    display: grid;

    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));

    gap: 20px;

    margin-top: 30px;
}

.tarjeta {
    background: white;

    padding: 25px;

    border-radius: 12px;

    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.tarjeta h3 {
    margin-bottom: 10px;
}

.tarjeta p {
    color: #6b7280;
}

/* TABLAS */

.tabla {
    width: 100%;

    border-collapse: collapse;

    background: white;

    margin-top: 25px;
}

.tabla th,
.tabla td {
    padding: 14px;

    border-bottom: 1px solid #e5e7eb;

    text-align: left;
}

.tabla th {
    background: #eff6ff;
}

/* FOOTER */

footer {
    text-align: center;

    padding: 25px;

    color: #6b7280;

    font-size: 14px;
}
html, body {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

.imagen-container {
    width: 100%;
    max-width: 100%;
    margin-top: 25px;
    text-align: center;
    overflow: hidden;
}

.imagen-aulacloud {
    display: block;
    width: 180px;
    max-width: 90%;
    height: auto;
    margin: 0 auto;
    border-radius: 10px;
}