:root {
    --color-fondo: #f4f4f4;
    --color-card: #ffffff;
    --color-texto: #222222;
    --color-primario: #333333;
    --color-borde: #cccccc;
    --color-item: #fafafa;
}

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

body {
    background-color: var(--color-fondo);
    color: var(--color-texto);
    font-family: sans-serif;
}

.marcas-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 15px;
}

.marcas-card {
    background: var(--color-card);
    border: 1px solid var(--color-borde);
    padding: 25px;
    width: 100%;
    max-width: 380px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

@media (min-width: 768px) {
    .marcas-card {
        max-width: 450px;
    }
}

.marcas-header {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.marcas-header p {
    color: #666;
    font-size: 14px;
}

.reloj-contenedor {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--color-item);
    border: 1px solid var(--color-borde);
    padding: 12px;
    gap: 4px;
}

#reloj-hora {
    font-size: 26px;
    font-weight: bold;
    color: var(--color-primario);
}

#reloj-fecha {
    font-size: 13px;
    color: #777;
    text-transform: capitalize;
}

.marcas-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-size: 14px;
    font-weight: bold;
}

.form-group input,
.form-group select {
    padding: 10px;
    border: 1px solid var(--color-borde);
    font-size: 14px;
}

.btn-marcar {
    background: var(--color-primario);
    color: var(--color-card);
    border: none;
    padding: 10px;
    font-size: 15px;
    cursor: pointer;
    margin-top: 5px;
}

.btn-marcar:hover {
    background: #555;
}

.mensaje-alerta {
    display: none;
    padding: 10px;
    font-size: 14px;
    text-align: center;
}

.aviso-privacidad {
    background: var(--color-item);
    border: 1px solid var(--color-borde);
    padding: 10px;
    font-size: 12px;
    color: #555;
    line-height: 1.4;
}

.aviso-privacidad a {
    color: #0056b3;
    text-decoration: underline;
}

.marcas-footer {
    display: flex;
    justify-content: center;
    border-top: 1px solid var(--color-borde);
    padding-top: 10px;
}

.marcas-footer a {
    text-decoration: none;
    color: #0056b3;
    font-size: 13px;
}